xref: /freebsd/crypto/openssl/Configure (revision 37c8ee8847faa53432809cae2ecc11b80c4eab2f) 
1#! /usr/bin/env perl
2# -*- mode: perl; -*-
3# Copyright 2016-2023 The OpenSSL Project Authors. All Rights Reserved.
4#
5# Licensed under the Apache License 2.0 (the "License").  You may not use
6# this file except in compliance with the License.  You can obtain a copy
7# in the file LICENSE in the source distribution or at
8# https://www.openssl.org/source/license.html
9
10##  Configure -- OpenSSL source tree configuration script
11
12use 5.10.0;
13use strict;
14use Config;
15use FindBin;
16use lib "$FindBin::Bin/util/perl";
17use File::Basename;
18use File::Spec::Functions qw/:DEFAULT abs2rel rel2abs splitdir/;
19use File::Path qw/mkpath/;
20use OpenSSL::fallback "$FindBin::Bin/external/perl/MODULES.txt";
21use OpenSSL::Glob;
22use OpenSSL::Template;
23use OpenSSL::config;
24
25# see INSTALL.md for instructions.
26
27my $orig_death_handler = $SIG{__DIE__};
28$SIG{__DIE__} = \&death_handler;
29
30my $usage="Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-egd] [sctp] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [--config=FILE] os/compiler[:flags]\n";
31
32my $banner = <<"EOF";
33
34**********************************************************************
35***                                                                ***
36***   OpenSSL has been successfully configured                     ***
37***                                                                ***
38***   If you encounter a problem while building, please open an    ***
39***   issue on GitHub <https://github.com/openssl/openssl/issues>  ***
40***   and include the output from the following command:           ***
41***                                                                ***
42***       perl configdata.pm --dump                                ***
43***                                                                ***
44***   (If you are new to OpenSSL, you might want to consult the    ***
45***   'Troubleshooting' section in the INSTALL.md file first)      ***
46***                                                                ***
47**********************************************************************
48EOF
49
50# Options:
51#
52# --config      add the given configuration file, which will be read after
53#               any "Configurations*" files that are found in the same
54#               directory as this script.
55# --prefix      prefix for the OpenSSL installation, which includes the
56#               directories bin, lib, include, share/man, share/doc/openssl
57#               This becomes the value of INSTALLTOP in Makefile
58#               (Default: /usr/local)
59# --openssldir  OpenSSL data area, such as openssl.cnf, certificates and keys.
60#               If it's a relative directory, it will be added on the directory
61#               given with --prefix.
62#               This becomes the value of OPENSSLDIR in Makefile and in C.
63#               (Default: PREFIX/ssl)
64# --banner=".." Output specified text instead of default completion banner
65#
66# -w            Don't wait after showing a Configure warning
67#
68# --cross-compile-prefix Add specified prefix to binutils components.
69#
70# --api         One of 0.9.8, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, or 3.0
71#               Define the public APIs as they were for that version
72#               including patch releases.  If 'no-deprecated' is also
73#               given, do not compile support for interfaces deprecated
74#               up to and including the specified OpenSSL version.
75#
76# no-hw-xxx     do not compile support for specific crypto hardware.
77#               Generic OpenSSL-style methods relating to this support
78#               are always compiled but return NULL if the hardware
79#               support isn't compiled.
80# no-hw         do not compile support for any crypto hardware.
81# [no-]threads  [don't] try to create a library that is suitable for
82#               multithreaded applications (default is "threads" if we
83#               know how to do it)
84# [no-]shared   [don't] try to create shared libraries when supported.
85# [no-]pic      [don't] try to build position independent code when supported.
86#               If disabled, it also disables shared and dynamic-engine.
87# no-asm        do not use assembler
88# no-egd        do not compile support for the entropy-gathering daemon APIs
89# [no-]zlib     [don't] compile support for zlib compression.
90# zlib-dynamic  Like "zlib", but the zlib library is expected to be a shared
91#               library and will be loaded in run-time by the OpenSSL library.
92# sctp          include SCTP support
93# no-uplink     Don't build support for UPLINK interface.
94# enable-weak-ssl-ciphers
95#               Enable weak ciphers that are disabled by default.
96# 386           generate 80386 code in assembly modules
97# no-sse2       disables IA-32 SSE2 code in assembly modules, the above
98#               mentioned '386' option implies this one
99# no-<cipher>   build without specified algorithm (dsa, idea, rc5, ...)
100# -<xxx> +<xxx> All options which are unknown to the 'Configure' script are
101# /<xxx>        passed through to the compiler. Unix-style options beginning
102#               with a '-' or '+' are recognized, as well as Windows-style
103#               options beginning with a '/'. If the option contains arguments
104#               separated by spaces, then the URL-style notation %20 can be
105#               used for the space character in order to avoid having to quote
106#               the option. For example, -opt%20arg gets expanded to -opt arg.
107#               In fact, any ASCII character can be encoded as %xx using its
108#               hexadecimal encoding.
109# -static       while -static is also a pass-through compiler option (and
110#               as such is limited to environments where it's actually
111#               meaningful), it triggers a number configuration options,
112#               namely no-pic, no-shared and no-threads. It is
113#               argued that the only reason to produce statically linked
114#               binaries (and in context it means executables linked with
115#               -static flag, and not just executables linked with static
116#               libcrypto.a) is to eliminate dependency on specific run-time,
117#               a.k.a. libc version. The mentioned config options are meant
118#               to achieve just that. Unfortunately on Linux it's impossible
119#               to eliminate the dependency completely for openssl executable
120#               because of getaddrinfo and gethostbyname calls, which can
121#               invoke dynamically loadable library facility anyway to meet
122#               the lookup requests. For this reason on Linux statically
123#               linked openssl executable has rather debugging value than
124#               production quality.
125#
126# BN_LLONG      use the type 'long long' in crypto/bn/bn.h
127# RC4_CHAR      use 'char' instead of 'int' for RC4_INT in crypto/rc4/rc4.h
128# Following are set automatically by this script
129#
130# MD5_ASM       use some extra md5 assembler,
131# SHA1_ASM      use some extra sha1 assembler, must define L_ENDIAN for x86
132# RMD160_ASM    use some extra ripemd160 assembler,
133# SHA256_ASM    sha256_block is implemented in assembler
134# SHA512_ASM    sha512_block is implemented in assembler
135# AES_ASM       AES_[en|de]crypt is implemented in assembler
136
137# Minimum warning options... any contributions to OpenSSL should at least
138# get past these.  Note that we only use these with C compilers, not with
139# C++ compilers.
140
141# -DPEDANTIC complements -pedantic and is meant to mask code that
142# is not strictly standard-compliant and/or implementation-specific,
143# e.g. inline assembly, disregards to alignment requirements, such
144# that -pedantic would complain about. Incidentally -DPEDANTIC has
145# to be used even in sanitized builds, because sanitizer too is
146# supposed to and does take notice of non-standard behaviour. Then
147# -pedantic with pre-C9x compiler would also complain about 'long
148# long' not being supported. As 64-bit algorithms are common now,
149# it grew impossible to resolve this without sizeable additional
150# code, so we just tell compiler to be pedantic about everything
151# but 'long long' type.
152
153my @gcc_devteam_warn = qw(
154    -DPEDANTIC -pedantic -Wno-long-long -DUNUSEDRESULT_DEBUG
155    -Wall
156    -Wmissing-declarations
157    -Wextra
158    -Wno-unused-parameter
159    -Wno-missing-field-initializers
160    -Wswitch
161    -Wsign-compare
162    -Wshadow
163    -Wformat
164    -Wtype-limits
165    -Wundef
166    -Werror
167    -Wmissing-prototypes
168    -Wstrict-prototypes
169);
170
171# These are used in addition to $gcc_devteam_warn when the compiler is clang.
172# TODO(openssl-team): fix problems and investigate if (at least) the
173# following warnings can also be enabled:
174#       -Wcast-align
175#       -Wunreachable-code -- no, too ugly/compiler-specific
176#       -Wlanguage-extension-token -- no, we use asm()
177#       -Wunused-macros -- no, too tricky for BN and _XOPEN_SOURCE etc
178#       -Wextended-offsetof -- no, needed in CMS ASN1 code
179my @clang_devteam_warn = qw(
180    -Wno-unknown-warning-option
181    -Wswitch-default
182    -Wno-parentheses-equality
183    -Wno-language-extension-token
184    -Wno-extended-offsetof
185    -Wconditional-uninitialized
186    -Wincompatible-pointer-types-discards-qualifiers
187    -Wmissing-variable-declarations
188);
189
190my @cl_devteam_warn = qw(
191    /WX
192);
193
194my $strict_warnings = 0;
195
196# As for $BSDthreads. Idea is to maintain "collective" set of flags,
197# which would cover all BSD flavors. -pthread applies to them all,
198# but is treated differently. OpenBSD expands is as -D_POSIX_THREAD
199# -lc_r, which is sufficient. FreeBSD 4.x expands it as -lc_r,
200# which has to be accompanied by explicit -D_THREAD_SAFE and
201# sometimes -D_REENTRANT. FreeBSD 5.x expands it as -lc_r, which
202# seems to be sufficient?
203our $BSDthreads="-pthread -D_THREAD_SAFE -D_REENTRANT";
204
205#
206# API compatibility name to version number mapping.
207#
208my $apitable = {
209    # This table expresses when API additions or changes can occur.
210    # The numbering used changes from 3.0 and on because we updated
211    # (solidified) our version numbering scheme at that point.
212
213    # From 3.0 and on, we internalise the given version number in decimal
214    # as MAJOR * 10000 + MINOR * 100 + 0
215    "3.0.0" => 30000,
216    "3.0"   => 30000,
217
218    # Note that before 3.0, we didn't have the same version number scheme.
219    # Still, the numbering we use here covers what we need.
220    "1.1.1" => 10101,
221    "1.1.0" => 10100,
222    "1.0.2" => 10002,
223    "1.0.1" => 10001,
224    "1.0.0" => 10000,
225    "0.9.8" =>   908,
226};
227
228# For OpenSSL::config::get_platform
229my %guess_opts = ();
230
231my $dryrun = 0;
232
233our %table = ();
234our %config = ();
235our %withargs = ();
236our $now_printing;      # set to current entry's name in print_table_entry
237                        # (todo: right thing would be to encapsulate name
238                        # into %target [class] and make print_table_entry
239                        # a method)
240
241# Forward declarations ###############################################
242
243# read_config(filename)
244#
245# Reads a configuration file and populates %table with the contents
246# (which the configuration file places in %targets).
247sub read_config;
248
249# resolve_config(target)
250#
251# Resolves all the late evaluations, inheritances and so on for the
252# chosen target and any target it inherits from.
253sub resolve_config;
254
255
256# Information collection #############################################
257
258# Unified build supports separate build dir
259my $srcdir = catdir(absolutedir(dirname($0))); # catdir ensures local syntax
260my $blddir = catdir(absolutedir("."));         # catdir ensures local syntax
261
262# File::Spec::Unix doesn't detect case insensitivity, so we make sure to
263# check if the source and build directory are really the same, and make
264# them so.  This avoids all kinds of confusion later on.
265# We must check @File::Spec::ISA rather than using File::Spec->isa() to
266# know if File::Spec ended up loading File::Spec::Unix.
267$srcdir = $blddir
268    if (grep(/::Unix$/, @File::Spec::ISA)
269        && samedir($srcdir, $blddir));
270
271my $dofile = abs2rel(catfile($srcdir, "util/dofile.pl"));
272
273my $local_config_envname = 'OPENSSL_LOCAL_CONFIG_DIR';
274
275$config{sourcedir} = abs2rel($srcdir, $blddir);
276$config{builddir} = abs2rel($blddir, $blddir);
277# echo -n 'holy hand grenade of antioch' | openssl sha256
278$config{FIPSKEY} =
279    'f4556650ac31d35461610bac4ed81b1a181b2d8a43ea2854cbae22ca74560813';
280
281# Collect reconfiguration information if needed
282my @argvcopy=@ARGV;
283
284if (grep /^reconf(igure)?$/, @argvcopy) {
285    die "reconfiguring with other arguments present isn't supported"
286        if scalar @argvcopy > 1;
287    if (-f "./configdata.pm") {
288        my $file = "./configdata.pm";
289        unless (my $return = do $file) {
290            die "couldn't parse $file: $@" if $@;
291            die "couldn't do $file: $!"    unless defined $return;
292            die "couldn't run $file"       unless $return;
293        }
294
295        @argvcopy = defined($configdata::config{perlargv}) ?
296            @{$configdata::config{perlargv}} : ();
297        die "Incorrect data to reconfigure, please do a normal configuration\n"
298            if (grep(/^reconf/,@argvcopy));
299        $config{perlenv} = $configdata::config{perlenv} // {};
300    } else {
301        die "Insufficient data to reconfigure, please do a normal configuration\n";
302    }
303}
304
305$config{perlargv} = [ @argvcopy ];
306
307# Historical: if known directories in crypto/ have been removed, it means
308# that those sub-systems are disabled.
309# (the other option would be to removed them from the SUBDIRS statement in
310# crypto/build.info)
311# We reverse the input list for cosmetic purely reasons, to compensate that
312# 'unshift' adds at the front of the list (i.e. in reverse input order).
313foreach ( reverse sort( 'aes', 'aria', 'bf', 'camellia', 'cast', 'des', 'dh',
314                        'dsa', 'ec', 'hmac', 'idea', 'md2', 'md5', 'mdc2',
315                        'rc2', 'rc4', 'rc5', 'ripemd', 'seed', 'sha',
316                        'sm2', 'sm3', 'sm4') ) {
317    unshift @argvcopy, "no-$_" if ! -d catdir($srcdir, 'crypto', $_);
318}
319
320# Collect version numbers
321my %version = ();
322
323collect_information(
324    collect_from_file(catfile($srcdir,'VERSION.dat')),
325    qr/\s*(\w+)\s*=\s*(.*?)\s*$/ =>
326        sub {
327            # Only define it if there is a value at all
328            if ($2 ne '') {
329                my $k = $1;
330                my $v = $2;
331                # Some values are quoted.  Trim the quotes
332                $v = $1 if $v =~ /^"(.*)"$/;
333                $version{uc $k} = $v;
334            }
335        },
336    "OTHERWISE" =>
337        sub { die "Something wrong with this line:\n$_\nin $srcdir/VERSION.dat" },
338    );
339
340$config{major} = $version{MAJOR} // 'unknown';
341$config{minor} = $version{MINOR} // 'unknown';
342$config{patch} = $version{PATCH} // 'unknown';
343$config{prerelease} =
344    defined $version{PRE_RELEASE_TAG} ? "-$version{PRE_RELEASE_TAG}" : '';
345$config{build_metadata} =
346    defined $version{BUILD_METADATA} ? "+$version{BUILD_METADATA}" : '';
347$config{shlib_version} = $version{SHLIB_VERSION} // 'unknown';
348$config{release_date} = $version{RELEASE_DATE} // 'xx XXX xxxx';
349
350$config{version} = "$config{major}.$config{minor}.$config{patch}";
351$config{full_version} = "$config{version}$config{prerelease}$config{build_metadata}";
352
353die "erroneous version information in VERSION.dat: ",
354    "$config{version}, $config{shlib_version}\n"
355    unless (defined $version{MAJOR}
356            && defined $version{MINOR}
357            && defined $version{PATCH}
358            && defined $version{SHLIB_VERSION});
359
360# Collect target configurations
361
362my $pattern = catfile(dirname($0), "Configurations", "*.conf");
363foreach (sort glob($pattern)) {
364    &read_config($_);
365}
366
367if (defined env($local_config_envname)) {
368    if ($^O eq 'VMS') {
369        # VMS environment variables are logical names,
370        # which can be used as is
371        $pattern = $local_config_envname . ':' . '*.conf';
372    } else {
373        $pattern = catfile(env($local_config_envname), '*.conf');
374    }
375
376    foreach (sort glob($pattern)) {
377        &read_config($_);
378    }
379}
380
381# Save away perl command information
382$config{perl_cmd} = $^X;
383$config{perl_version} = $Config{version};
384$config{perl_archname} = $Config{archname};
385
386$config{prefix}="";
387$config{openssldir}="";
388$config{processor}="";
389$config{libdir}="";
390my $auto_threads=1;    # enable threads automatically? true by default
391my $default_ranlib;
392
393# Known TLS and DTLS protocols
394my @tls = qw(ssl3 tls1 tls1_1 tls1_2 tls1_3);
395my @dtls = qw(dtls1 dtls1_2);
396
397# Explicitly known options that are possible to disable.  They can
398# be regexps, and will be used like this: /^no-${option}$/
399# For developers: keep it sorted alphabetically
400
401my @disablables = (
402    "acvp-tests",
403    "afalgeng",
404    "aria",
405    "asan",
406    "asm",
407    "async",
408    "autoalginit",
409    "autoerrinit",
410    "autoload-config",
411    "bf",
412    "blake2",
413    "buildtest-c++",
414    "bulk",
415    "cached-fetch",
416    "camellia",
417    "capieng",
418    "cast",
419    "chacha",
420    "cmac",
421    "cmp",
422    "cms",
423    "comp",
424    "crypto-mdebug",
425    "ct",
426    "deprecated",
427    "des",
428    "devcryptoeng",
429    "dgram",
430    "dh",
431    "dsa",
432    "dso",
433    "dtls",
434    "dynamic-engine",
435    "ec",
436    "ec2m",
437    "ec_nistp_64_gcc_128",
438    "ecdh",
439    "ecdsa",
440    "egd",
441    "engine",
442    "err",
443    "external-tests",
444    "filenames",
445    "fips",
446    "fips-securitychecks",
447    "fuzz-afl",
448    "fuzz-libfuzzer",
449    "gost",
450    "idea",
451    "ktls",
452    "legacy",
453    "loadereng",
454    "makedepend",
455    "md2",
456    "md4",
457    "mdc2",
458    "module",
459    "msan",
460    "multiblock",
461    "nextprotoneg",
462    "ocb",
463    "ocsp",
464    "padlockeng",
465    "pic",
466    "pinshared",
467    "poly1305",
468    "posix-io",
469    "psk",
470    "rc2",
471    "rc4",
472    "rc5",
473    "rdrand",
474    "rfc3779",
475    "rmd160",
476    "scrypt",
477    "sctp",
478    "secure-memory",
479    "seed",
480    "shared",
481    "siphash",
482    "siv",
483    "sm2",
484    "sm3",
485    "sm4",
486    "sock",
487    "srp",
488    "srtp",
489    "sse2",
490    "ssl",
491    "ssl-trace",
492    "static-engine",
493    "stdio",
494    "tests",
495    "threads",
496    "tls",
497    "trace",
498    "ts",
499    "ubsan",
500    "ui-console",
501    "unit-test",
502    "uplink",
503    "weak-ssl-ciphers",
504    "whirlpool",
505    "zlib",
506    "zlib-dynamic",
507    );
508foreach my $proto ((@tls, @dtls))
509        {
510        push(@disablables, $proto);
511        push(@disablables, "$proto-method") unless $proto eq "tls1_3";
512        }
513
514# Internal disablables, for aliasing purposes.  They serve no special
515# purpose here, but allow scripts to get to know them through configdata.pm,
516# where these are merged with @disablables.
517# The actual aliasing mechanism is done via %disable_cascades
518my @disablables_int = qw(
519    crmf
520    );
521
522my %deprecated_disablables = (
523    "ssl2" => undef,
524    "buf-freelists" => undef,
525    "crypto-mdebug-backtrace" => undef,
526    "hw" => "hw",               # causes cascade, but no macro
527    "hw-padlock" => "padlockeng",
528    "ripemd" => "rmd160",
529    "ui" => "ui-console",
530    "heartbeats" => undef,
531    );
532
533# All of the following are disabled by default:
534
535our %disabled = ( # "what"         => "comment"
536                  "fips"                => "default",
537                  "asan"                => "default",
538                  "buildtest-c++"       => "default",
539                  "crypto-mdebug"       => "default",
540                  "crypto-mdebug-backtrace" => "default",
541                  "devcryptoeng"        => "default",
542                  "ec_nistp_64_gcc_128" => "default",
543                  "egd"                 => "default",
544                  "external-tests"      => "default",
545                  "fuzz-afl"            => "default",
546                  "fuzz-libfuzzer"      => "default",
547                  "ktls"                => "default",
548                  "md2"                 => "default",
549                  "msan"                => "default",
550                  "rc5"                 => "default",
551                  "sctp"                => "default",
552                  "ssl3"                => "default",
553                  "ssl3-method"         => "default",
554                  "trace"               => "default",
555                  "ubsan"               => "default",
556                  "unit-test"           => "default",
557                  "weak-ssl-ciphers"    => "default",
558                  "zlib"                => "default",
559                  "zlib-dynamic"        => "default",
560                );
561
562# Note: => pair form used for aesthetics, not to truly make a hash table
563my @disable_cascades = (
564    # "what"            => [ "cascade", ... ]
565    "bulk"              => [ "shared", "dso",
566                             "aria", "async", "autoload-config",
567                             "blake2", "bf", "camellia", "cast", "chacha",
568                             "cmac", "cms", "cmp", "comp", "ct",
569                             "des", "dgram", "dh", "dsa",
570                             "ec", "engine",
571                             "filenames",
572                             "idea", "ktls",
573                             "md4", "multiblock", "nextprotoneg",
574                             "ocsp", "ocb", "poly1305", "psk",
575                             "rc2", "rc4", "rmd160",
576                             "seed", "siphash", "siv",
577                             "sm3", "sm4", "srp",
578                             "srtp", "ssl3-method", "ssl-trace",
579                             "ts", "ui-console", "whirlpool",
580                             "fips-securitychecks" ],
581    sub { $config{processor} eq "386" }
582                        => [ "sse2" ],
583    "ssl"               => [ "ssl3" ],
584    "ssl3-method"       => [ "ssl3" ],
585    "zlib"              => [ "zlib-dynamic" ],
586    "des"               => [ "mdc2" ],
587    "ec"                => [ "ec2m", "ecdsa", "ecdh", "sm2", "gost" ],
588    "dgram"             => [ "dtls", "sctp" ],
589    "sock"              => [ "dgram" ],
590    "dtls"              => [ @dtls ],
591    sub { 0 == scalar grep { !$disabled{$_} } @dtls }
592                        => [ "dtls" ],
593
594    "tls"               => [ @tls ],
595    sub { 0 == scalar grep { !$disabled{$_} } @tls }
596                        => [ "tls" ],
597
598    "crypto-mdebug"     => [ "crypto-mdebug-backtrace" ],
599
600    # If no modules, then no dynamic engines either
601    "module"            => [ "dynamic-engine" ],
602
603    # Without shared libraries, dynamic engines aren't possible.
604    # This is due to them having to link with libcrypto and register features
605    # using the ENGINE functionality, and since that relies on global tables,
606    # those *have* to be exacty the same as the ones accessed from the app,
607    # which cannot be guaranteed if shared libraries aren't present.
608    # (note that even with shared libraries, both the app and dynamic engines
609    # must be linked with the same library)
610    "shared"            => [ "dynamic-engine", "uplink" ],
611    "dso"               => [ "dynamic-engine", "module" ],
612    # Other modules don't necessarily have to link with libcrypto, so shared
613    # libraries do not have to be a condition to produce those.
614
615    # Without position independent code, there can be no shared libraries
616    # or modules.
617    "pic"               => [ "shared", "module" ],
618
619    "module"            => [ "fips", "dso" ],
620
621    "engine"            => [ "dynamic-engine", grep(/eng$/, @disablables) ],
622    "dynamic-engine"    => [ "loadereng" ],
623    "hw"                => [ "padlockeng" ],
624
625    # no-autoalginit is only useful when building non-shared
626    "autoalginit"       => [ "shared", "apps", "fips" ],
627
628    "stdio"             => [ "apps", "capieng", "egd" ],
629    "apps"              => [ "tests" ],
630    "tests"             => [ "external-tests" ],
631    "comp"              => [ "zlib" ],
632    "sm3"               => [ "sm2" ],
633    sub { !$disabled{"unit-test"} } => [ "heartbeats" ],
634
635    sub { !$disabled{"msan"} } => [ "asm" ],
636
637    "cmac"              => [ "siv" ],
638    "legacy"            => [ "md2" ],
639
640    "cmp"               => [ "crmf" ],
641
642    "fips"              => [ "fips-securitychecks", "acvp-tests" ],
643
644    "deprecated-3.0"    => [ "engine", "srp" ]
645    );
646
647# Avoid protocol support holes.  Also disable all versions below N, if version
648# N is disabled while N+1 is enabled.
649#
650my @list = (reverse @tls);
651while ((my $first, my $second) = (shift @list, shift @list)) {
652    last unless @list;
653    push @disable_cascades, ( sub { !$disabled{$first} && $disabled{$second} }
654                              => [ @list ] );
655    unshift @list, $second;
656}
657my @list = (reverse @dtls);
658while ((my $first, my $second) = (shift @list, shift @list)) {
659    last unless @list;
660    push @disable_cascades, ( sub { !$disabled{$first} && $disabled{$second} }
661                              => [ @list ] );
662    unshift @list, $second;
663}
664
665# Explicit "no-..." options will be collected in %disabled along with the defaults.
666# To remove something from %disabled, use "enable-foo".
667# For symmetry, "disable-foo" is a synonym for "no-foo".
668
669# For the "make variables" CPPINCLUDES and CPPDEFINES, we support lists with
670# platform specific list separators.  Users from those platforms should
671# recognise those separators from how you set up the PATH to find executables.
672# The default is the Unix like separator, :, but as an exception, we also
673# support the space as separator.
674my $list_separator_re =
675    { VMS           => qr/(?<!\^),/,
676      MSWin32       => qr/(?<!\\);/ } -> {$^O} // qr/(?<!\\)[:\s]/;
677# All the "make variables" we support
678# Some get pre-populated for the sake of backward compatibility
679# (we supported those before the change to "make variable" support.
680my %user = (
681    AR          => env('AR'),
682    ARFLAGS     => [],
683    AS          => undef,
684    ASFLAGS     => [],
685    CC          => env('CC'),
686    CFLAGS      => [ env('CFLAGS') || () ],
687    CXX         => env('CXX'),
688    CXXFLAGS    => [ env('CXXFLAGS') || () ],
689    CPP         => undef,
690    CPPFLAGS    => [ env('CPPFLAGS') || () ],  # -D, -I, -Wp,
691    CPPDEFINES  => [],  # Alternative for -D
692    CPPINCLUDES => [],  # Alternative for -I
693    CROSS_COMPILE => env('CROSS_COMPILE'),
694    HASHBANGPERL=> env('HASHBANGPERL') || env('PERL'),
695    LD          => undef,
696    LDFLAGS     => [ env('LDFLAGS') || () ],  # -L, -Wl,
697    LDLIBS      => [ env('LDLIBS') || () ],  # -l
698    MT          => undef,
699    MTFLAGS     => [],
700    PERL        => env('PERL') || ($^O ne "VMS" ? $^X : "perl"),
701    RANLIB      => env('RANLIB'),
702    RC          => env('RC') || env('WINDRES'),
703    RCFLAGS     => [ env('RCFLAGS') || () ],
704    RM          => undef,
705   );
706# Info about what "make variables" may be prefixed with the cross compiler
707# prefix.  This should NEVER mention any such variable with a list for value.
708my @user_crossable = qw ( AR AS CC CXX CPP LD MT RANLIB RC );
709# The same but for flags given as Configure options.  These are *additional*
710# input, as opposed to the VAR=string option that override the corresponding
711# config target attributes
712my %useradd = (
713    CPPDEFINES  => [],
714    CPPINCLUDES => [],
715    CPPFLAGS    => [],
716    CFLAGS      => [],
717    CXXFLAGS    => [],
718    LDFLAGS     => [],
719    LDLIBS      => [],
720    RCFLAGS     => [],
721   );
722
723my %user_synonyms = (
724    HASHBANGPERL=> 'PERL',
725    RC          => 'WINDRES',
726   );
727
728# Some target attributes have been renamed, this is the translation table
729my %target_attr_translate =(
730    ar          => 'AR',
731    as          => 'AS',
732    cc          => 'CC',
733    cxx         => 'CXX',
734    cpp         => 'CPP',
735    hashbangperl => 'HASHBANGPERL',
736    ld          => 'LD',
737    mt          => 'MT',
738    ranlib      => 'RANLIB',
739    rc          => 'RC',
740    rm          => 'RM',
741   );
742
743# Initialisers coming from 'config' scripts
744$config{defines} = [ split(/$list_separator_re/, env('__CNF_CPPDEFINES')) ];
745$config{includes} = [ split(/$list_separator_re/, env('__CNF_CPPINCLUDES')) ];
746$config{cppflags} = [ env('__CNF_CPPFLAGS') || () ];
747$config{cflags} = [ env('__CNF_CFLAGS') || () ];
748$config{cxxflags} = [ env('__CNF_CXXFLAGS') || () ];
749$config{lflags} = [ env('__CNF_LDFLAGS') || () ];
750$config{ex_libs} = [ env('__CNF_LDLIBS') || () ];
751
752$config{openssl_api_defines}=[];
753$config{openssl_sys_defines}=[];
754$config{openssl_feature_defines}=[];
755$config{options}="";
756$config{build_type} = "release";
757my $target="";
758
759my %cmdvars = ();               # Stores FOO='blah' type arguments
760my %unsupported_options = ();
761my %deprecated_options = ();
762# If you change this, update apps/version.c
763my @known_seed_sources = qw(getrandom devrandom os egd none rdcpu librandom);
764my @seed_sources = ();
765while (@argvcopy)
766        {
767        $_ = shift @argvcopy;
768
769        # Support env variable assignments among the options
770        if (m|^(\w+)=(.+)?$|)
771                {
772                $cmdvars{$1} = $2;
773                # Every time a variable is given as a configuration argument,
774                # it acts as a reset if the variable.
775                if (exists $user{$1})
776                        {
777                        $user{$1} = ref $user{$1} eq "ARRAY" ? [] : undef;
778                        }
779                #if (exists $useradd{$1})
780                #       {
781                #       $useradd{$1} = [];
782                #       }
783                next;
784                }
785
786        # VMS is a case insensitive environment, and depending on settings
787        # out of our control, we may receive options uppercased.  Let's
788        # downcase at least the part before any equal sign.
789        if ($^O eq "VMS")
790                {
791                s/^([^=]*)/lc($1)/e;
792                }
793
794        # some people just can't read the instructions, clang people have to...
795        s/^-no-(?!integrated-as)/no-/;
796
797        # rewrite some options in "enable-..." form
798        s /^-?-?shared$/enable-shared/;
799        s /^sctp$/enable-sctp/;
800        s /^threads$/enable-threads/;
801        s /^zlib$/enable-zlib/;
802        s /^zlib-dynamic$/enable-zlib-dynamic/;
803        s /^fips$/enable-fips/;
804
805        if (/^(no|disable|enable)-(.+)$/)
806                {
807                my $word = $2;
808                if ($word !~ m|hw(?:-.+)| # special treatment for hw regexp opt
809                        && !exists $deprecated_disablables{$word}
810                        && !grep { $word eq $_ } @disablables)
811                        {
812                        $unsupported_options{$_} = 1;
813                        next;
814                        }
815                }
816        if (/^no-(.+)$/ || /^disable-(.+)$/)
817                {
818                foreach my $proto ((@tls, @dtls))
819                        {
820                        if ($1 eq "$proto-method")
821                                {
822                                $disabled{"$proto"} = "option($proto-method)";
823                                last;
824                                }
825                        }
826                if ($1 eq "dtls")
827                        {
828                        foreach my $proto (@dtls)
829                                {
830                                $disabled{$proto} = "option(dtls)";
831                                }
832                        $disabled{"dtls"} = "option(dtls)";
833                        }
834                elsif ($1 eq "ssl")
835                        {
836                        # Last one of its kind
837                        $disabled{"ssl3"} = "option(ssl)";
838                        }
839                elsif ($1 eq "tls")
840                        {
841                        # XXX: Tests will fail if all SSL/TLS
842                        # protocols are disabled.
843                        foreach my $proto (@tls)
844                                {
845                                $disabled{$proto} = "option(tls)";
846                                }
847                        }
848                elsif ($1 eq "static-engine")
849                        {
850                        delete $disabled{"dynamic-engine"};
851                        }
852                elsif ($1 eq "dynamic-engine")
853                        {
854                        $disabled{"dynamic-engine"} = "option";
855                        }
856                elsif (exists $deprecated_disablables{$1})
857                        {
858                        $deprecated_options{$_} = 1;
859                        if (defined $deprecated_disablables{$1})
860                                {
861                                $disabled{$deprecated_disablables{$1}} = "option";
862                                }
863                        }
864                elsif ($1 =~ m|hw(?:-.+)|) # deprecate hw options in regexp form
865                        {
866                        $deprecated_options{$_} = 1;
867                        }
868                else
869                        {
870                        $disabled{$1} = "option";
871                        }
872                # No longer an automatic choice
873                $auto_threads = 0 if ($1 eq "threads");
874                }
875        elsif (/^enable-(.+)$/)
876                {
877                if ($1 eq "static-engine")
878                        {
879                        $disabled{"dynamic-engine"} = "option";
880                        }
881                elsif ($1 eq "dynamic-engine")
882                        {
883                        delete $disabled{"dynamic-engine"};
884                        }
885                elsif ($1 eq "zlib-dynamic")
886                        {
887                        delete $disabled{"zlib"};
888                        }
889                my $algo = $1;
890                delete $disabled{$algo};
891
892                # No longer an automatic choice
893                $auto_threads = 0 if ($1 eq "threads");
894                }
895        elsif (/^-d$/)          # From older 'config'
896                {
897                $config{build_type} = "debug";
898                }
899        elsif (/^-v$/)          # From older 'config'
900                {
901                $guess_opts{verbose} = 1;
902                }
903        elsif (/^-w$/)
904                {
905                $guess_opts{nowait} = 1;
906                }
907        elsif (/^-t$/)          # From older 'config'
908                {
909                $dryrun = 1;
910                }
911        elsif (/^--strict-warnings$/)
912                {
913                # Pretend that our strict flags is a C flag, and replace it
914                # with the proper flags later on
915                push @{$useradd{CFLAGS}}, '--ossl-strict-warnings';
916                $strict_warnings=1;
917                }
918        elsif (/^--debug$/)
919                {
920                $config{build_type} = "debug";
921                }
922        elsif (/^--release$/)
923                {
924                $config{build_type} = "release";
925                }
926        elsif (/^386$/)
927                { $config{processor}=386; }
928        elsif (/^rsaref$/)
929                {
930                # No RSAref support any more since it's not needed.
931                # The check for the option is there so scripts aren't
932                # broken
933                }
934        elsif (m|^[-+/]|)
935                {
936                if (/^--prefix=(.*)$/)
937                        {
938                        $config{prefix}=$1;
939                        die "Directory given with --prefix MUST be absolute\n"
940                                unless file_name_is_absolute($config{prefix});
941                        }
942                elsif (/^--api=(.*)$/)
943                        {
944                        my $api = $1;
945                        die "Unknown API compatibility level $api"
946                                unless defined $apitable->{$api};
947                        $config{api}=$apitable->{$api};
948                        }
949                elsif (/^--libdir=(.*)$/)
950                        {
951                        $config{libdir}=$1;
952                        }
953                elsif (/^--openssldir=(.*)$/)
954                        {
955                        $config{openssldir}=$1;
956                        }
957                elsif (/^--with-zlib-lib=(.*)$/)
958                        {
959                        $withargs{zlib_lib}=$1;
960                        }
961                elsif (/^--with-zlib-include=(.*)$/)
962                        {
963                        $withargs{zlib_include}=$1;
964                        }
965                elsif (/^--with-fuzzer-lib=(.*)$/)
966                        {
967                        $withargs{fuzzer_lib}=$1;
968                        }
969                elsif (/^--with-fuzzer-include=(.*)$/)
970                        {
971                        $withargs{fuzzer_include}=$1;
972                        }
973                elsif (/^--with-rand-seed=(.*)$/)
974                        {
975                        foreach my $x (split(m|,|, $1))
976                            {
977                            die "Unknown --with-rand-seed choice $x\n"
978                                if ! grep { $x eq $_ } @known_seed_sources;
979                            push @seed_sources, $x;
980                            }
981                        }
982                elsif (/^--fips-key=(.*)$/)
983                        {
984                        $user{FIPSKEY}=lc($1);
985                        die "Non-hex character in FIPS key\n"
986                           if $user{FIPSKEY} =~ /[^a-f0-9]/;
987                        die "FIPS key must have even number of characters\n"
988                           if length $1 & 1;
989                        die "FIPS key too long (64 bytes max)\n"
990                           if length $1 > 64;
991                        }
992                elsif (/^--banner=(.*)$/)
993                        {
994                        $banner = $1 . "\n";
995                        }
996                elsif (/^--cross-compile-prefix=(.*)$/)
997                        {
998                        $user{CROSS_COMPILE}=$1;
999                        }
1000                elsif (/^--config=(.*)$/)
1001                        {
1002                        read_config $1;
1003                        }
1004                elsif (/^-l(.*)$/)
1005                        {
1006                        push @{$useradd{LDLIBS}}, $_;
1007                        }
1008                elsif (/^-framework$/)
1009                        {
1010                        push @{$useradd{LDLIBS}}, $_, shift(@argvcopy);
1011                        }
1012                elsif (/^-L(.*)$/ or /^-Wl,/)
1013                        {
1014                        push @{$useradd{LDFLAGS}}, $_;
1015                        }
1016                elsif (/^-rpath$/ or /^-R$/)
1017                        # -rpath is the OSF1 rpath flag
1018                        # -R is the old Solaris rpath flag
1019                        {
1020                        my $rpath = shift(@argvcopy) || "";
1021                        $rpath .= " " if $rpath ne "";
1022                        push @{$useradd{LDFLAGS}}, $_, $rpath;
1023                        }
1024                elsif (/^-static$/)
1025                        {
1026                        push @{$useradd{LDFLAGS}}, $_;
1027                        }
1028                elsif (m|^[-/]D(.*)$|)
1029                        {
1030                        push @{$useradd{CPPDEFINES}}, $1;
1031                        }
1032                elsif (m|^[-/]I(.*)$|)
1033                        {
1034                        push @{$useradd{CPPINCLUDES}}, $1;
1035                        }
1036                elsif (/^-Wp,$/)
1037                        {
1038                        push @{$useradd{CPPFLAGS}}, $1;
1039                        }
1040                else    # common if (/^[-+]/), just pass down...
1041                        {
1042                        # Treat %xx as an ASCII code (e.g. replace %20 by a space character).
1043                        # This provides a simple way to pass options with arguments separated
1044                        # by spaces without quoting (e.g. -opt%20arg translates to -opt arg).
1045                        $_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
1046                        push @{$useradd{CFLAGS}}, $_;
1047                        push @{$useradd{CXXFLAGS}}, $_;
1048                        }
1049                }
1050        elsif (m|^/|)
1051                {
1052                # Treat %xx as an ASCII code (e.g. replace %20 by a space character).
1053                # This provides a simple way to pass options with arguments separated
1054                # by spaces without quoting (e.g. /opt%20arg translates to /opt arg).
1055                $_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
1056                push @{$useradd{CFLAGS}}, $_;
1057                push @{$useradd{CXXFLAGS}}, $_;
1058                }
1059        else
1060                {
1061                die "target already defined - $target (offending arg: $_)\n" if ($target ne "");
1062                $target=$_;
1063                }
1064        unless ($_ eq $target || /^no-/ || /^disable-/)
1065                {
1066                # "no-..." follows later after implied deactivations
1067                # have been derived.  (Don't take this too seriously,
1068                # we really only write OPTIONS to the Makefile out of
1069                # nostalgia.)
1070
1071                if ($config{options} eq "")
1072                        { $config{options} = $_; }
1073                else
1074                        { $config{options} .= " ".$_; }
1075                }
1076        }
1077
1078if (keys %deprecated_options)
1079        {
1080        warn "***** Deprecated options: ",
1081                join(", ", keys %deprecated_options), "\n";
1082        }
1083if (keys %unsupported_options)
1084        {
1085        die "***** Unsupported options: ",
1086                join(", ", keys %unsupported_options), "\n";
1087        }
1088
1089# If any %useradd entry has been set, we must check that the "make
1090# variables" haven't been set.  We start by checking of any %useradd entry
1091# is set.
1092if (grep { scalar @$_ > 0 } values %useradd) {
1093    # Hash of env / make variables names.  The possible values are:
1094    # 1 - "make vars"
1095    # 2 - %useradd entry set
1096    # 3 - both set
1097    my %detected_vars =
1098        map { my $v = 0;
1099              $v += 1 if $cmdvars{$_};
1100              $v += 2 if @{$useradd{$_}};
1101              $_ => $v }
1102        keys %useradd;
1103
1104    # If any of the corresponding "make variables" is set, we error
1105    if (grep { $_ & 1 } values %detected_vars) {
1106        my $names = join(', ', grep { $detected_vars{$_} > 0 }
1107                               sort keys %detected_vars);
1108        die <<"_____";
1109***** Mixing make variables and additional compiler/linker flags as
1110***** configure command line option is not permitted.
1111***** Affected make variables: $names
1112_____
1113    }
1114}
1115
1116# Check through all supported command line variables to see if any of them
1117# were set, and canonicalise the values we got.  If no compiler or linker
1118# flag or anything else that affects %useradd was set, we also check the
1119# environment for values.
1120my $anyuseradd =
1121    grep { defined $_ && (ref $_ ne 'ARRAY' || @$_) } values %useradd;
1122foreach (keys %user) {
1123    my $value = $cmdvars{$_};
1124    $value //= env($_) unless $anyuseradd;
1125    $value //=
1126        defined $user_synonyms{$_} ? $cmdvars{$user_synonyms{$_}} : undef;
1127    $value //= defined $user_synonyms{$_} ? env($user_synonyms{$_}) : undef
1128        unless $anyuseradd;
1129
1130    if (defined $value) {
1131        if (ref $user{$_} eq 'ARRAY') {
1132            if ($_ eq 'CPPDEFINES' || $_ eq 'CPPINCLUDES') {
1133                $user{$_} = [ split /$list_separator_re/, $value ];
1134            } else {
1135                $user{$_} = [ $value ];
1136            }
1137        } elsif (!defined $user{$_}) {
1138            $user{$_} = $value;
1139        }
1140    }
1141}
1142
1143if (grep { /-rpath\b/ } ($user{LDFLAGS} ? @{$user{LDFLAGS}} : ())
1144    && !$disabled{shared}
1145    && !($disabled{asan} && $disabled{msan} && $disabled{ubsan})) {
1146    die "***** Cannot simultaneously use -rpath, shared libraries, and\n",
1147        "***** any of asan, msan or ubsan\n";
1148}
1149
1150# If no target was given, try guessing.
1151unless ($target) {
1152    my %system_config = OpenSSL::config::get_platform(%guess_opts, %user);
1153
1154    # The $system_config{disable} is used to populate %disabled with
1155    # entries that aren't already there.
1156    foreach ( @{$system_config{disable} // []} ) {
1157        $disabled{$_} = 'system' unless defined $disabled{$_};
1158    }
1159    delete $system_config{disable};
1160
1161    # Override config entries with stuff from the guesser.
1162    # It's assumed that this really is nothing new.
1163    %config = ( %config, %system_config );
1164    $target = $system_config{target};
1165}
1166
1167sub disable {
1168    my $disable_type = shift;
1169
1170    for (@_) {
1171        $disabled{$_} = $disable_type;
1172    }
1173
1174    my @tocheckfor = (@_ ? @_ : keys %disabled);
1175    while (@tocheckfor) {
1176        my %new_tocheckfor = ();
1177        my @cascade_copy = (@disable_cascades);
1178        while (@cascade_copy) {
1179            my ($test, $descendents) =
1180                (shift @cascade_copy, shift @cascade_copy);
1181            if (ref($test) eq "CODE" ? $test->() : defined($disabled{$test})) {
1182                foreach (grep { !defined($disabled{$_}) } @$descendents) {
1183                    $new_tocheckfor{$_} = 1; $disabled{$_} = "cascade";
1184                }
1185            }
1186        }
1187        @tocheckfor = (keys %new_tocheckfor);
1188    }
1189}
1190disable();                     # First cascade run
1191
1192our $die = sub { die @_; };
1193if ($target eq "TABLE") {
1194    local $die = sub { warn @_; };
1195    foreach (sort keys %table) {
1196        print_table_entry($_, "TABLE");
1197    }
1198    exit 0;
1199}
1200
1201if ($target eq "LIST") {
1202    foreach (sort keys %table) {
1203        print $_,"\n" unless $table{$_}->{template};
1204    }
1205    exit 0;
1206}
1207
1208if ($target eq "HASH") {
1209    local $die = sub { warn @_; };
1210    print "%table = (\n";
1211    foreach (sort keys %table) {
1212        print_table_entry($_, "HASH");
1213    }
1214    exit 0;
1215}
1216
1217print "Configuring OpenSSL version $config{full_version} ";
1218print "for target $target\n";
1219
1220if (scalar(@seed_sources) == 0) {
1221    print "Using os-specific seed configuration\n";
1222    push @seed_sources, 'os';
1223}
1224if (scalar(grep { $_ eq 'egd' } @seed_sources) > 0) {
1225    delete $disabled{'egd'};
1226}
1227if (scalar(grep { $_ eq 'none' } @seed_sources) > 0) {
1228    die "Cannot seed with none and anything else" if scalar(@seed_sources) > 1;
1229    warn <<_____ if scalar(@seed_sources) == 1;
1230
1231============================== WARNING ===============================
1232You have selected the --with-rand-seed=none option, which effectively
1233disables automatic reseeding of the OpenSSL random generator.
1234All operations depending on the random generator such as creating keys
1235will not work unless the random generator is seeded manually by the
1236application.
1237
1238Please read the 'Note on random number generation' section in the
1239INSTALL.md instructions and the RAND_DRBG(7) manual page for more
1240details.
1241============================== WARNING ===============================
1242
1243_____
1244}
1245push @{$config{openssl_feature_defines}},
1246     map { (my $x = $_) =~ tr|[\-a-z]|[_A-Z]|; "OPENSSL_RAND_SEED_$x" }
1247        @seed_sources;
1248
1249# Backward compatibility?
1250if ($target =~ m/^CygWin32(-.*)$/) {
1251    $target = "Cygwin".$1;
1252}
1253
1254# Support for legacy targets having a name starting with 'debug-'
1255my ($d, $t) = $target =~ m/^(debug-)?(.*)$/;
1256if ($d) {
1257    $config{build_type} = "debug";
1258
1259    # If we do not find debug-foo in the table, the target is set to foo.
1260    if (!$table{$target}) {
1261        $target = $t;
1262    }
1263}
1264
1265if ($target) {
1266    # It's possible that we have different config targets for specific
1267    # toolchains, so we try to detect them, and go for the plain config
1268    # target if not.
1269    my $found;
1270    foreach ( ( "$target-$user{CC}", "$target", undef ) ) {
1271        $found=$_ if $table{$_} && !$table{$_}->{template};
1272        last if $found;
1273    }
1274    $target = $found;
1275} else {
1276    # If we don't have a config target now, we try the C compiler as we
1277    # fallback
1278    my $cc = $user{CC} // 'cc';
1279    $target = $cc if $table{$cc} && !$table{$cc}->{template};
1280}
1281
1282&usage unless $target;
1283
1284exit 0 if $dryrun;              # From older 'config'
1285
1286$config{target} = $target;
1287my %target = resolve_config($target);
1288
1289foreach (keys %target_attr_translate) {
1290    $target{$target_attr_translate{$_}} = $target{$_}
1291        if $target{$_};
1292    delete $target{$_};
1293}
1294
1295%target = ( %{$table{DEFAULTS}}, %target );
1296
1297my %conf_files = map { $_ => 1 } (@{$target{_conf_fname_int}});
1298$config{conf_files} = [ sort keys %conf_files ];
1299
1300# Using sub disable within these loops may prove fragile, so we run
1301# a cascade afterwards
1302foreach my $feature (@{$target{disable}}) {
1303    if (exists $deprecated_disablables{$feature}) {
1304        warn "***** config $target disables deprecated feature $feature\n";
1305    } elsif (!grep { $feature eq $_ } @disablables) {
1306        die "***** config $target disables unknown feature $feature\n";
1307    }
1308    $disabled{$feature} = 'config';
1309}
1310foreach my $feature (@{$target{enable}}) {
1311    if ("default" eq ($disabled{$feature} // "")) {
1312        if (exists $deprecated_disablables{$feature}) {
1313            warn "***** config $target enables deprecated feature $feature\n";
1314        } elsif (!grep { $feature eq $_ } @disablables) {
1315            die "***** config $target enables unknown feature $feature\n";
1316        }
1317        delete $disabled{$feature};
1318    }
1319}
1320
1321# If uplink_arch isn't defined, disable uplink
1322$disabled{uplink} = 'no uplink_arch' unless (defined $target{uplink_arch});
1323# If asm_arch isn't defined, disable asm
1324$disabled{asm} = 'no asm_arch' unless (defined $target{asm_arch});
1325
1326disable();                      # Run a cascade now
1327
1328$target{CXXFLAGS}//=$target{CFLAGS} if $target{CXX};
1329$target{cxxflags}//=$target{cflags} if $target{CXX};
1330$target{exe_extension}=".exe" if ($config{target} eq "DJGPP");
1331$target{exe_extension}=".pm"  if ($config{target} =~ /vos/);
1332
1333# Fill %config with values from %user, and in case those are undefined or
1334# empty, use values from %target (acting as a default).
1335foreach (keys %user) {
1336    my $ref_type = ref $user{$_};
1337
1338    # Temporary function.  Takes an intended ref type (empty string or "ARRAY")
1339    # and a value that's to be coerced into that type.
1340    my $mkvalue = sub {
1341        my $type = shift;
1342        my $value = shift;
1343        my $undef_p = shift;
1344
1345        die "Too many arguments for \$mkvalue" if @_;
1346
1347        while (ref $value eq 'CODE') {
1348            $value = $value->();
1349        }
1350
1351        if ($type eq 'ARRAY') {
1352            return undef unless defined $value;
1353            return undef if ref $value ne 'ARRAY' && !$value;
1354            return undef if ref $value eq 'ARRAY' && !@$value;
1355            return [ $value ] unless ref $value eq 'ARRAY';
1356        }
1357        return undef unless $value;
1358        return $value;
1359    };
1360
1361    $config{$_} =
1362        $mkvalue->($ref_type, $user{$_})
1363        || $mkvalue->($ref_type, $target{$_});
1364    delete $config{$_} unless defined $config{$_};
1365}
1366
1367# Finish up %config by appending things the user gave us on the command line
1368# apart from "make variables"
1369foreach (keys %useradd) {
1370    # The must all be lists, so we assert that here
1371    die "internal error: \$useradd{$_} isn't an ARRAY\n"
1372        unless ref $useradd{$_} eq 'ARRAY';
1373
1374    if (defined $config{$_}) {
1375        push @{$config{$_}}, @{$useradd{$_}};
1376    } else {
1377        $config{$_} = [ @{$useradd{$_}} ];
1378    }
1379}
1380# At this point, we can forget everything about %user and %useradd,
1381# because it's now all been merged into the corresponding $config entry
1382
1383if (grep { $_ =~ /(?:^|\s)-static(?:\s|$)/ } @{$config{LDFLAGS}}) {
1384    disable('static', 'pic', 'threads');
1385}
1386
1387# Allow overriding the build file name
1388$config{build_file} = env('BUILDFILE') || $target{build_file} || "Makefile";
1389
1390# Make sure build_scheme is consistent.
1391$target{build_scheme} = [ $target{build_scheme} ]
1392    if ref($target{build_scheme}) ne "ARRAY";
1393
1394my ($builder, $builder_platform, @builder_opts) =
1395    @{$target{build_scheme}};
1396
1397foreach my $checker (($builder_platform."-".$config{build_file}."-checker.pm",
1398                      $builder_platform."-checker.pm")) {
1399    my $checker_path = catfile($srcdir, "Configurations", $checker);
1400    if (-f $checker_path) {
1401        my $fn = $ENV{CONFIGURE_CHECKER_WARN}
1402            ? sub { warn $@; } : sub { die $@; };
1403        if (! do $checker_path) {
1404            if ($@) {
1405                $fn->($@);
1406            } elsif ($!) {
1407                $fn->($!);
1408            } else {
1409                $fn->("The detected tools didn't match the platform\n");
1410            }
1411        }
1412        last;
1413    }
1414}
1415
1416push @{$config{defines}}, "NDEBUG"    if $config{build_type} eq "release";
1417
1418if ($target =~ /^mingw/ && `$config{CC} --target-help 2>&1` =~ m/-mno-cygwin/m)
1419        {
1420        push @{$config{cflags}}, "-mno-cygwin";
1421        push @{$config{cxxflags}}, "-mno-cygwin" if $config{CXX};
1422        push @{$config{shared_ldflag}}, "-mno-cygwin";
1423        }
1424
1425if ($target =~ /linux.*-mips/ && !$disabled{asm}
1426        && !grep { $_ =~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})) {
1427        # minimally required architecture flags for assembly modules
1428        my $value;
1429        $value = '-mips2' if ($target =~ /mips32/);
1430        $value = '-mips3' if ($target =~ /mips64/);
1431        unshift @{$config{cflags}}, $value;
1432        unshift @{$config{cxxflags}}, $value if $config{CXX};
1433}
1434
1435# If threads aren't disabled, check how possible they are
1436unless ($disabled{threads}) {
1437    if ($auto_threads) {
1438        # Enabled by default, disable it forcibly if unavailable
1439        if ($target{thread_scheme} eq "(unknown)") {
1440            disable("unavailable", 'threads');
1441        }
1442    } else {
1443        # The user chose to enable threads explicitly, let's see
1444        # if there's a chance that's possible
1445        if ($target{thread_scheme} eq "(unknown)") {
1446            # If the user asked for "threads" and we don't have internal
1447            # knowledge how to do it, [s]he is expected to provide any
1448            # system-dependent compiler options that are necessary.  We
1449            # can't truly check that the given options are correct, but
1450            # we expect the user to know what [s]He is doing.
1451            if (!@{$config{CFLAGS}} && !@{$config{CPPDEFINES}}) {
1452                die "You asked for multi-threading support, but didn't\n"
1453                    ,"provide any system-specific compiler options\n";
1454            }
1455        }
1456    }
1457}
1458
1459# Find out if clang's sanitizers have been enabled with -fsanitize
1460# flags and ensure that the corresponding %disabled elements area
1461# removed to reflect that the sanitizers are indeed enabled.
1462my %detected_sanitizers = ();
1463foreach (grep /^-fsanitize=/, @{$config{CFLAGS} || []}) {
1464    (my $checks = $_) =~ s/^-fsanitize=//;
1465    foreach (split /,/, $checks) {
1466        my $d = { address       => 'asan',
1467                  undefined     => 'ubsan',
1468                  memory        => 'msan' } -> {$_};
1469        next unless defined $d;
1470
1471        $detected_sanitizers{$d} = 1;
1472        if (defined $disabled{$d}) {
1473            die "***** Conflict between disabling $d and enabling $_ sanitizer"
1474                if $disabled{$d} ne "default";
1475            delete $disabled{$d};
1476        }
1477    }
1478}
1479
1480# If threads still aren't disabled, add a C macro to ensure the source
1481# code knows about it.  Any other flag is taken care of by the configs.
1482unless($disabled{threads}) {
1483    push @{$config{openssl_feature_defines}}, "OPENSSL_THREADS";
1484}
1485
1486my $no_shared_warn=0;
1487if (($target{shared_target} // '') eq "")
1488        {
1489        $no_shared_warn = 1
1490            if (!$disabled{shared} || !$disabled{"dynamic-engine"});
1491        disable('no-shared-target', 'pic');
1492        }
1493
1494if ($disabled{"dynamic-engine"}) {
1495        $config{dynamic_engines} = 0;
1496} else {
1497        $config{dynamic_engines} = 1;
1498}
1499
1500unless ($disabled{asan} || defined $detected_sanitizers{asan}) {
1501    push @{$config{cflags}}, "-fsanitize=address";
1502}
1503
1504unless ($disabled{ubsan} || defined $detected_sanitizers{ubsan}) {
1505    push @{$config{cflags}}, "-fsanitize=undefined", "-fno-sanitize-recover=all", "-DPEDANTIC";
1506}
1507
1508unless ($disabled{msan} || defined $detected_sanitizers{msan}) {
1509  push @{$config{cflags}}, "-fsanitize=memory";
1510}
1511
1512unless ($disabled{"fuzz-libfuzzer"} && $disabled{"fuzz-afl"}
1513        && $disabled{asan} && $disabled{ubsan} && $disabled{msan}) {
1514    push @{$config{cflags}}, "-fno-omit-frame-pointer", "-g";
1515    push @{$config{cxxflags}}, "-fno-omit-frame-pointer", "-g" if $config{CXX};
1516}
1517#
1518# Platform fix-ups
1519#
1520
1521# This saves the build files from having to check
1522if ($disabled{pic})
1523        {
1524        foreach (qw(shared_cflag shared_cxxflag shared_cppflag
1525                    shared_defines shared_includes shared_ldflag
1526                    module_cflags module_cxxflags module_cppflags
1527                    module_defines module_includes module_lflags))
1528                {
1529                delete $config{$_};
1530                $target{$_} = "";
1531                }
1532        }
1533else
1534        {
1535        push @{$config{lib_defines}}, "OPENSSL_PIC";
1536        }
1537
1538if ($target{sys_id} ne "")
1539        {
1540        push @{$config{openssl_sys_defines}}, "OPENSSL_SYS_$target{sys_id}";
1541        }
1542
1543my %predefined_C = compiler_predefined($config{CROSS_COMPILE}.$config{CC});
1544my %predefined_CXX = $config{CXX}
1545    ? compiler_predefined($config{CROSS_COMPILE}.$config{CXX})
1546    : ();
1547
1548unless ($disabled{asm}) {
1549    # big endian systems can use ELFv2 ABI
1550    if ($target eq "linux-ppc64") {
1551        $target{perlasm_scheme} = "linux64v2" if ($predefined_C{_CALL_ELF} == 2);
1552    }
1553}
1554
1555# Check for makedepend capabilities.
1556if (!$disabled{makedepend}) {
1557    # If the attribute makedep_scheme is defined, then we assume that the
1558    # config target and its associated build file are programmed to deal
1559    # with it.
1560    # If makedep_scheme is undefined, we go looking for GCC compatible
1561    # dependency making, and if that's not available, we try to fall back
1562    # on 'makedepend'.
1563    if ($target{makedep_scheme}) {
1564        $config{makedep_scheme} = $target{makedep_scheme};
1565        # If the makedepcmd attribute is defined, copy it.  If not, the
1566        # build files will have to fend for themselves.
1567        $config{makedepcmd} = $target{makedepcmd} if $target{makedepcmd};
1568    } elsif (($predefined_C{__GNUC__} // -1) >= 3
1569             && !($predefined_C{__APPLE_CC__} && !$predefined_C{__clang__})) {
1570        # We know that GNU C version 3 and up as well as all clang
1571        # versions support dependency generation, but Xcode did not
1572        # handle $cc -M before clang support (but claims __GNUC__ = 3)
1573        $config{makedep_scheme} = 'gcc';
1574    } else {
1575        # In all other cases, we look for 'makedepend', and set the
1576        # makedep_scheme value if we found it.
1577        $config{makedepcmd} = which('makedepend');
1578        $config{makedep_scheme} = 'makedepend' if $config{makedepcmd};
1579    }
1580
1581    # If no depend scheme is set, we disable makedepend
1582    disable('unavailable', 'makedepend') unless $config{makedep_scheme};
1583}
1584
1585if (!$disabled{asm} && !$predefined_C{__MACH__} && $^O ne 'VMS') {
1586    # probe for -Wa,--noexecstack option...
1587    if ($predefined_C{__clang__}) {
1588        # clang has builtin assembler, which doesn't recognize --help,
1589        # but it apparently recognizes the option in question on all
1590        # supported platforms even when it's meaningless. In other words
1591        # probe would fail, but probed option always accepted...
1592        push @{$config{cflags}}, "-Wa,--noexecstack", "-Qunused-arguments";
1593    } else {
1594        my $cc = $config{CROSS_COMPILE}.$config{CC};
1595        open(PIPE, "$cc -Wa,--help -c -o null.$$.o -x assembler /dev/null 2>&1 |");
1596        while(<PIPE>) {
1597            if (m/--noexecstack/) {
1598                push @{$config{cflags}}, "-Wa,--noexecstack";
1599                last;
1600            }
1601        }
1602        close(PIPE);
1603        unlink("null.$$.o");
1604    }
1605}
1606
1607# Deal with bn_ops ###################################################
1608
1609$config{bn_ll}                  =0;
1610my $def_int="unsigned int";
1611$config{rc4_int}                =$def_int;
1612($config{b64l},$config{b64},$config{b32})=(0,0,1);
1613
1614my $count = 0;
1615foreach (sort split(/\s+/,$target{bn_ops})) {
1616    $count++ if /SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT/;
1617    $config{bn_ll}=1                            if $_ eq 'BN_LLONG';
1618    $config{rc4_int}="unsigned char"            if $_ eq 'RC4_CHAR';
1619    ($config{b64l},$config{b64},$config{b32})
1620        =(0,1,0)                                if $_ eq 'SIXTY_FOUR_BIT';
1621    ($config{b64l},$config{b64},$config{b32})
1622        =(1,0,0)                                if $_ eq 'SIXTY_FOUR_BIT_LONG';
1623    ($config{b64l},$config{b64},$config{b32})
1624        =(0,0,1)                                if $_ eq 'THIRTY_TWO_BIT';
1625}
1626die "Exactly one of SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT can be set in bn_ops\n"
1627    if $count > 1;
1628
1629$config{api} = $config{major} * 10000 + $config{minor} * 100
1630    unless $config{api};
1631foreach (keys %$apitable) {
1632    $disabled{"deprecated-$_"} = "deprecation"
1633        if $disabled{deprecated} && $config{api} >= $apitable->{$_};
1634}
1635
1636disable();                      # Run a cascade now
1637
1638# Hack cflags for better warnings (dev option) #######################
1639
1640# "Stringify" the C and C++ flags string.  This permits it to be made part of
1641# a string and works as well on command lines.
1642$config{cflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
1643                        @{$config{cflags}} ];
1644$config{cxxflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
1645                          @{$config{cxxflags}} ] if $config{CXX};
1646
1647$config{openssl_api_defines} = [
1648    "OPENSSL_CONFIGURED_API=".$config{api},
1649];
1650
1651my @strict_warnings_collection=();
1652if ($strict_warnings)
1653        {
1654        my $wopt;
1655        my $gccver = $predefined_C{__GNUC__} // -1;
1656
1657        if ($gccver >= 4)
1658                {
1659                push @strict_warnings_collection, @gcc_devteam_warn;
1660                push @strict_warnings_collection, @clang_devteam_warn
1661                    if (defined($predefined_C{__clang__}));
1662                }
1663        elsif ($config{target} =~ /^VC-/)
1664                {
1665                push @strict_warnings_collection, @cl_devteam_warn;
1666                }
1667        else
1668                {
1669                warn "WARNING --strict-warnings requires gcc[>=4] or gcc-alike, or MSVC"
1670                }
1671        }
1672
1673$config{CFLAGS} = [ map { $_ eq '--ossl-strict-warnings'
1674                              ? @strict_warnings_collection
1675                              : ( $_ ) }
1676                    @{$config{CFLAGS}} ];
1677
1678unless ($disabled{afalgeng}) {
1679    $config{afalgeng}="";
1680    if (grep { $_ eq 'afalgeng' } @{$target{enable}}) {
1681        my $minver = 4*10000 + 1*100 + 0;
1682        if ($config{CROSS_COMPILE} eq "") {
1683            my $verstr = `uname -r`;
1684            my ($ma, $mi1, $mi2) = split("\\.", $verstr);
1685            ($mi2) = $mi2 =~ /(\d+)/;
1686            my $ver = $ma*10000 + $mi1*100 + $mi2;
1687            if ($ver < $minver) {
1688                disable('too-old-kernel', 'afalgeng');
1689            } else {
1690                push @{$config{engdirs}}, "afalg";
1691            }
1692        } else {
1693            disable('cross-compiling', 'afalgeng');
1694        }
1695    } else {
1696        disable('not-linux', 'afalgeng');
1697    }
1698}
1699
1700unless ($disabled{devcryptoeng}) {
1701    if ($target =~ m/^BSD/) {
1702        my $maxver = 5*100 + 7;
1703        my $sysstr = `uname -s`;
1704        my $verstr = `uname -r`;
1705        $sysstr =~ s|\R$||;
1706        $verstr =~ s|\R$||;
1707        my ($ma, $mi, @rest) = split m|\.|, $verstr;
1708        my $ver = $ma*100 + $mi;
1709        if ($sysstr eq 'OpenBSD' && $ver >= $maxver) {
1710            disable('too-new-kernel', 'devcryptoeng');
1711        }
1712    }
1713}
1714
1715unless ($disabled{ktls}) {
1716    $config{ktls}="";
1717    my $cc = $config{CROSS_COMPILE}.$config{CC};
1718    if ($target =~ m/^linux/) {
1719        system("printf '#include <sys/types.h>\n#include <linux/tls.h>' | $cc -E - >/dev/null 2>&1");
1720        if ($? != 0) {
1721            disable('too-old-kernel', 'ktls');
1722        }
1723    } elsif ($target =~ m/^BSD/) {
1724        system("printf '#include <sys/types.h>\n#include <sys/ktls.h>' | $cc -E - >/dev/null 2>&1");
1725        if ($? != 0) {
1726            disable('too-old-freebsd', 'ktls');
1727        }
1728    } else {
1729        disable('not-linux-or-freebsd', 'ktls');
1730    }
1731}
1732
1733push @{$config{openssl_other_defines}}, "OPENSSL_NO_KTLS" if ($disabled{ktls});
1734
1735# Get the extra flags used when building shared libraries and modules.  We
1736# do this late because some of them depend on %disabled.
1737
1738# Make the flags to build DSOs the same as for shared libraries unless they
1739# are already defined
1740$target{module_cflags} = $target{shared_cflag} unless defined $target{module_cflags};
1741$target{module_cxxflags} = $target{shared_cxxflag} unless defined $target{module_cxxflags};
1742$target{module_ldflags} = $target{shared_ldflag} unless defined $target{module_ldflags};
1743{
1744    my $shared_info_pl =
1745        catfile(dirname($0), "Configurations", "shared-info.pl");
1746    my %shared_info = read_eval_file($shared_info_pl);
1747    push @{$target{_conf_fname_int}}, $shared_info_pl;
1748    my $si = $target{shared_target};
1749    while (ref $si ne "HASH") {
1750        last if ! defined $si;
1751        if (ref $si eq "CODE") {
1752            $si = $si->();
1753        } else {
1754            $si = $shared_info{$si};
1755        }
1756    }
1757
1758    # Some of the 'shared_target' values don't have any entries in
1759    # %shared_info.  That's perfectly fine, AS LONG AS the build file
1760    # template knows how to handle this.  That is currently the case for
1761    # Windows and VMS.
1762    if (defined $si) {
1763        # Just as above, copy certain shared_* attributes to the corresponding
1764        # module_ attribute unless the latter is already defined
1765        $si->{module_cflags} = $si->{shared_cflag} unless defined $si->{module_cflags};
1766        $si->{module_cxxflags} = $si->{shared_cxxflag} unless defined $si->{module_cxxflags};
1767        $si->{module_ldflags} = $si->{shared_ldflag} unless defined $si->{module_ldflags};
1768        foreach (sort keys %$si) {
1769            $target{$_} = defined $target{$_}
1770                ? add($si->{$_})->($target{$_})
1771                : $si->{$_};
1772        }
1773    }
1774}
1775
1776# ALL MODIFICATIONS TO %disabled, %config and %target MUST BE DONE FROM HERE ON
1777
1778######################################################################
1779# Build up information for skipping certain directories depending on disabled
1780# features, as well as setting up macros for disabled features.
1781
1782# This is a tentative database of directories to skip.  Some entries may not
1783# correspond to anything real, but that's ok, they will simply be ignored.
1784# The actual processing of these entries is done in the build.info lookup
1785# loop further down.
1786#
1787# The key is a Unix formatted path in the source tree, the value is an index
1788# into %disabled_info, so any existing path gets added to a corresponding
1789# 'skipped' entry in there with the list of skipped directories.
1790my %skipdir = ();
1791my %disabled_info = ();         # For configdata.pm
1792foreach my $what (sort keys %disabled) {
1793    # There are deprecated disablables that translate to themselves.
1794    # They cause disabling cascades, but should otherwise not regiter.
1795    next if $deprecated_disablables{$what};
1796    # The generated $disabled{"deprecated-x.y"} entries are special
1797    # and treated properly elsewhere
1798    next if $what =~ m|^deprecated-|;
1799
1800    $config{options} .= " no-$what";
1801
1802    if (!grep { $what eq $_ } ( 'buildtest-c++', 'fips', 'threads', 'shared',
1803                                'module', 'pic', 'dynamic-engine', 'makedepend',
1804                                'zlib-dynamic', 'zlib', 'sse2', 'legacy' )) {
1805        (my $WHAT = uc $what) =~ s|-|_|g;
1806        my $skipdir = $what;
1807
1808        # fix-up crypto/directory name(s)
1809        $skipdir = "ripemd" if $what eq "rmd160";
1810        $skipdir = "whrlpool" if $what eq "whirlpool";
1811
1812        my $macro = $disabled_info{$what}->{macro} = "OPENSSL_NO_$WHAT";
1813        push @{$config{openssl_feature_defines}}, $macro;
1814
1815        $skipdir{engines} = $what if $what eq 'engine';
1816        $skipdir{"crypto/$skipdir"} = $what
1817            unless $what eq 'async' || $what eq 'err' || $what eq 'dso';
1818    }
1819}
1820
1821if ($disabled{"dynamic-engine"}) {
1822    push @{$config{openssl_feature_defines}}, "OPENSSL_NO_DYNAMIC_ENGINE";
1823} else {
1824    push @{$config{openssl_feature_defines}}, "OPENSSL_NO_STATIC_ENGINE";
1825}
1826
1827# If we use the unified build, collect information from build.info files
1828my %unified_info = ();
1829
1830my $buildinfo_debug = defined($ENV{CONFIGURE_DEBUG_BUILDINFO});
1831if ($builder eq "unified") {
1832    use Text::Template 1.46;
1833
1834    sub cleandir {
1835        my $base = shift;
1836        my $dir = shift;
1837        my $relativeto = shift || ".";
1838
1839        $dir = catdir($base,$dir) unless isabsolute($dir);
1840
1841        # Make sure the directories we're building in exists
1842        mkpath($dir);
1843
1844        my $res = abs2rel(absolutedir($dir), rel2abs($relativeto));
1845        #print STDERR "DEBUG[cleandir]: $dir , $base => $res\n";
1846        return $res;
1847    }
1848
1849    sub cleanfile {
1850        my $base = shift;
1851        my $file = shift;
1852        my $relativeto = shift || ".";
1853
1854        $file = catfile($base,$file) unless isabsolute($file);
1855
1856        my $d = dirname($file);
1857        my $f = basename($file);
1858
1859        # Make sure the directories we're building in exists
1860        mkpath($d);
1861
1862        my $res = abs2rel(catfile(absolutedir($d), $f), rel2abs($relativeto));
1863        #print STDERR "DEBUG[cleanfile]: $d , $f => $res\n";
1864        return $res;
1865    }
1866
1867    # Store the name of the template file we will build the build file from
1868    # in %config.  This may be useful for the build file itself.
1869    my @build_file_template_names =
1870        ( $builder_platform."-".$config{build_file}.".tmpl",
1871          $config{build_file}.".tmpl" );
1872    my @build_file_templates = ();
1873
1874    # First, look in the user provided directory, if given
1875    if (defined env($local_config_envname)) {
1876        @build_file_templates =
1877            map {
1878                if ($^O eq 'VMS') {
1879                    # VMS environment variables are logical names,
1880                    # which can be used as is
1881                    $local_config_envname . ':' . $_;
1882                } else {
1883                    catfile(env($local_config_envname), $_);
1884                }
1885            }
1886            @build_file_template_names;
1887    }
1888    # Then, look in our standard directory
1889    push @build_file_templates,
1890        ( map { cleanfile($srcdir, catfile("Configurations", $_), $blddir) }
1891          @build_file_template_names );
1892
1893    my $build_file_template;
1894    for $_ (@build_file_templates) {
1895        $build_file_template = $_;
1896        last if -f $build_file_template;
1897
1898        $build_file_template = undef;
1899    }
1900    if (!defined $build_file_template) {
1901        die "*** Couldn't find any of:\n", join("\n", @build_file_templates), "\n";
1902    }
1903    $config{build_file_templates}
1904      = [ cleanfile($srcdir, catfile("Configurations", "common0.tmpl"),
1905                    $blddir),
1906           $build_file_template ];
1907
1908    my @build_dirs = ( [ ] );   # current directory
1909
1910    $config{build_infos} = [ ];
1911
1912    # We want to detect configdata.pm in the source tree, so we
1913    # don't use it if the build tree is different.
1914    my $src_configdata = cleanfile($srcdir, "configdata.pm", $blddir);
1915
1916    # Any source file that we recognise is placed in this hash table, with
1917    # the list of its intended destinations as value.  When everything has
1918    # been collected, there's a routine that checks that these source files
1919    # exist, or if they are generated, that the generator exists.
1920    my %check_exist = ();
1921    my %check_generate = ();
1922
1923    my %ordinals = ();
1924    while (@build_dirs) {
1925        my @curd = @{shift @build_dirs};
1926        my $sourced = catdir($srcdir, @curd);
1927        my $buildd = catdir($blddir, @curd);
1928
1929        my $unixdir = join('/', @curd);
1930        if (exists $skipdir{$unixdir}) {
1931            my $what = $skipdir{$unixdir};
1932            push @{$disabled_info{$what}->{skipped}}, catdir(@curd);
1933            next;
1934        }
1935
1936        mkpath($buildd);
1937
1938        my $f = 'build.info';
1939        # The basic things we're trying to build
1940        my @programs = ();
1941        my @libraries = ();
1942        my @modules = ();
1943        my @scripts = ();
1944
1945        my %sources = ();
1946        my %shared_sources = ();
1947        my %includes = ();
1948        my %defines = ();
1949        my %depends = ();
1950        my %generate = ();
1951        my %imagedocs = ();
1952        my %htmldocs = ();
1953        my %mandocs = ();
1954
1955        # Support for $variablename in build.info files.
1956        # Embedded perl code is the ultimate master, still.  If its output
1957        # contains a dollar sign, it had better be escaped, or it will be
1958        # taken for a variable name prefix.
1959        my %variables = ();
1960        # Variable name syntax
1961        my $variable_name_re = qr/(?P<VARIABLE>[[:alpha:]][[:alnum:]_]*)/;
1962        # Value modifier syntaxes
1963        my $variable_subst_re = qr/\/(?P<RE>(?:\\\/|.)*?)\/(?P<SUBST>.*?)/;
1964        # Variable reference
1965        my $variable_simple_re = qr/(?<!\\)\$${variable_name_re}/;
1966        my $variable_w_mod_re =
1967            qr/(?<!\\)\$\{${variable_name_re}(?P<MOD>(?:\\\/|.)*?)\}/;
1968        # Tie it all together
1969        my $variable_re = qr/${variable_simple_re}|${variable_w_mod_re}/;
1970
1971        my $expand_variables = sub {
1972            my $value = '';
1973            my $value_rest = shift;
1974
1975            if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
1976                print STDERR
1977                    "DEBUG[\$expand_variables] Parsed '$value_rest' ...\n"
1978            }
1979
1980            while ($value_rest =~ /${variable_re}/) {
1981                # We must save important regexp values, because the next
1982                # regexp clears them
1983                my $mod = $+{MOD};
1984                my $variable_value = $variables{$+{VARIABLE}};
1985
1986                $value_rest = $';
1987                $value .= $`;
1988
1989                # Process modifier expressions, if present
1990                if (defined $mod) {
1991                    if ($mod =~ /^${variable_subst_re}$/) {
1992                        my $re = $+{RE};
1993                        my $subst = $+{SUBST};
1994
1995                        $variable_value =~ s/\Q$re\E/$subst/g;
1996
1997                        if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
1998                            print STDERR
1999                                "DEBUG[\$expand_variables] ... and substituted ",
2000                                "'$re' with '$subst'\n";
2001                        }
2002                    }
2003                }
2004
2005                $value .= $variable_value;
2006            }
2007            if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
2008                print STDERR
2009                    "DEBUG[\$expand_variables] ... into: '$value$value_rest'\n";
2010            }
2011            return $value . $value_rest;
2012        };
2013
2014        # Support for attributes in build.info files
2015        my %attributes = ();
2016        my $handle_attributes = sub {
2017            my $attr_str = shift;
2018            my $ref = shift;
2019            my @goals = @_;
2020
2021            return unless defined $attr_str;
2022
2023            my @a = tokenize($attr_str, qr|\s*,\s*|);
2024            foreach my $a (@a) {
2025                my $ac = 1;
2026                my $ak = $a;
2027                my $av = 1;
2028                if ($a =~ m|^(!)?(.*?)\s* = \s*(.*?)$|x) {
2029                    $ac = ! $1;
2030                    $ak = $2;
2031                    $av = $3;
2032                }
2033                foreach my $g (@goals) {
2034                    if ($ac) {
2035                        $$ref->{$g}->{$ak} = $av;
2036                    } else {
2037                        delete $$ref->{$g}->{$ak};
2038                    }
2039                }
2040            }
2041        };
2042
2043        # Support for pushing values on multiple indexes of a given hash
2044        # array.
2045        my $push_to = sub {
2046            my $valueref = shift;
2047            my $index_str = shift; # May be undef or empty
2048            my $attrref = shift;   # May be undef
2049            my $attr_str = shift;
2050            my @values = @_;
2051
2052            if (defined $index_str) {
2053                my @indexes = ( '' );
2054                if ($index_str !~ m|^\s*$|) {
2055                    @indexes = tokenize($index_str);
2056                }
2057                foreach (@indexes) {
2058                    push @{$valueref->{$_}}, @values;
2059                    if (defined $attrref) {
2060                        $handle_attributes->($attr_str, \$$attrref->{$_},
2061                                             @values);
2062                    }
2063                }
2064            } else {
2065                push @$valueref, @values;
2066                $handle_attributes->($attr_str, $attrref, @values)
2067                    if defined $attrref;
2068            }
2069        };
2070
2071        if ($buildinfo_debug) {
2072            print STDERR "DEBUG: Reading ",catfile($sourced, $f),"\n";
2073        }
2074        push @{$config{build_infos}}, catfile(abs2rel($sourced, $blddir), $f);
2075        my $template =
2076            Text::Template->new(TYPE => 'FILE',
2077                                SOURCE => catfile($sourced, $f),
2078                                PREPEND => qq{use lib "$FindBin::Bin/util/perl";});
2079        die "Something went wrong with $sourced/$f: $!\n" unless $template;
2080        my @text =
2081            split /^/m,
2082            $template->fill_in(HASH => { config => \%config,
2083                                         target => \%target,
2084                                         disabled => \%disabled,
2085                                         withargs => \%withargs,
2086                                         builddir => abs2rel($buildd, $blddir),
2087                                         sourcedir => abs2rel($sourced, $blddir),
2088                                         buildtop => abs2rel($blddir, $blddir),
2089                                         sourcetop => abs2rel($srcdir, $blddir) },
2090                               DELIMITERS => [ "{-", "-}" ]);
2091
2092        # The top item of this stack has the following values
2093        # -2 positive already run and we found ELSE (following ELSIF should fail)
2094        # -1 positive already run (skip until ENDIF)
2095        # 0 negatives so far (if we're at a condition, check it)
2096        # 1 last was positive (don't skip lines until next ELSE, ELSIF or ENDIF)
2097        # 2 positive ELSE (following ELSIF should fail)
2098        my @skip = ();
2099
2100        # A few useful generic regexps
2101        my $index_re = qr/\[\s*(?P<INDEX>(?:\\.|.)*?)\s*\]/;
2102        my $cond_re = qr/\[\s*(?P<COND>(?:\\.|.)*?)\s*\]/;
2103        my $attribs_re = qr/(?:\{\s*(?P<ATTRIBS>(?:\\.|.)*?)\s*\})?/;
2104        my $value_re = qr/(?P<VALUE>.*?)/;
2105        collect_information(
2106            collect_from_array([ @text ],
2107                               qr/\\$/ => sub { my $l1 = shift; my $l2 = shift;
2108                                                $l1 =~ s/\\$//; $l1.$l2 }),
2109            # Info we're looking for
2110            qr/^\s* IF ${cond_re} \s*$/x
2111            => sub {
2112                if (! @skip || $skip[$#skip] > 0) {
2113                    push @skip, !! $expand_variables->($+{COND});
2114                } else {
2115                    push @skip, -1;
2116                }
2117            },
2118            qr/^\s* ELSIF ${cond_re} \s*$/x
2119            => sub { die "ELSIF out of scope" if ! @skip;
2120                     die "ELSIF following ELSE" if abs($skip[$#skip]) == 2;
2121                     $skip[$#skip] = -1 if $skip[$#skip] != 0;
2122                     $skip[$#skip] = !! $expand_variables->($+{COND})
2123                         if $skip[$#skip] == 0; },
2124            qr/^\s* ELSE \s*$/x
2125            => sub { die "ELSE out of scope" if ! @skip;
2126                     $skip[$#skip] = -2 if $skip[$#skip] != 0;
2127                     $skip[$#skip] = 2 if $skip[$#skip] == 0; },
2128            qr/^\s* ENDIF \s*$/x
2129            => sub { die "ENDIF out of scope" if ! @skip;
2130                     pop @skip; },
2131            qr/^\s* ${variable_re} \s* = \s* ${value_re} \s* $/x
2132            => sub {
2133                if (!@skip || $skip[$#skip] > 0) {
2134                    $variables{$+{VARIABLE}} = $expand_variables->($+{VALUE});
2135                }
2136            },
2137            qr/^\s* SUBDIRS \s* = \s* ${value_re} \s* $/x
2138            => sub {
2139                if (!@skip || $skip[$#skip] > 0) {
2140                    foreach (tokenize($expand_variables->($+{VALUE}))) {
2141                        push @build_dirs, [ @curd, splitdir($_, 1) ];
2142                    }
2143                }
2144            },
2145            qr/^\s* PROGRAMS ${attribs_re} \s* =  \s* ${value_re} \s* $/x
2146            => sub { $push_to->(\@programs, undef,
2147                                \$attributes{programs}, $+{ATTRIBS},
2148                                tokenize($expand_variables->($+{VALUE})))
2149                         if !@skip || $skip[$#skip] > 0; },
2150            qr/^\s* LIBS ${attribs_re} \s* =  \s* ${value_re} \s* $/x
2151            => sub { $push_to->(\@libraries, undef,
2152                                \$attributes{libraries}, $+{ATTRIBS},
2153                                tokenize($expand_variables->($+{VALUE})))
2154                         if !@skip || $skip[$#skip] > 0; },
2155            qr/^\s* MODULES ${attribs_re} \s* =  \s* ${value_re} \s* $/x
2156            => sub { $push_to->(\@modules, undef,
2157                                \$attributes{modules}, $+{ATTRIBS},
2158                                tokenize($expand_variables->($+{VALUE})))
2159                         if !@skip || $skip[$#skip] > 0; },
2160            qr/^\s* SCRIPTS ${attribs_re} \s* = \s* ${value_re} \s* $/x
2161            => sub { $push_to->(\@scripts, undef,
2162                                \$attributes{scripts}, $+{ATTRIBS},
2163                                tokenize($expand_variables->($+{VALUE})))
2164                         if !@skip || $skip[$#skip] > 0; },
2165            qr/^\s* IMAGEDOCS ${index_re} \s* = \s* ${value_re} \s* $/x
2166            => sub { $push_to->(\%imagedocs, $expand_variables->($+{INDEX}),
2167                                undef, undef,
2168                                tokenize($expand_variables->($+{VALUE})))
2169                         if !@skip || $skip[$#skip] > 0; },
2170            qr/^\s* HTMLDOCS ${index_re} \s* = \s* ${value_re} \s* $/x
2171            => sub { $push_to->(\%htmldocs, $expand_variables->($+{INDEX}),
2172                                undef, undef,
2173                                tokenize($expand_variables->($+{VALUE})))
2174                         if !@skip || $skip[$#skip] > 0; },
2175            qr/^\s* MANDOCS ${index_re} \s* = \s* ${value_re} \s* $/x
2176            => sub { $push_to->(\%mandocs, $expand_variables->($+{INDEX}),
2177                                undef, undef,
2178                                tokenize($expand_variables->($+{VALUE})))
2179                         if !@skip || $skip[$#skip] > 0; },
2180            qr/^\s* SOURCE ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2181            => sub { $push_to->(\%sources, $expand_variables->($+{INDEX}),
2182                                \$attributes{sources}, $+{ATTRIBS},
2183                                tokenize($expand_variables->($+{VALUE})))
2184                         if !@skip || $skip[$#skip] > 0; },
2185            qr/^\s* SHARED_SOURCE ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2186            => sub { $push_to->(\%shared_sources, $expand_variables->($+{INDEX}),
2187                                \$attributes{sources}, $+{ATTRIBS},
2188                                tokenize($expand_variables->($+{VALUE})))
2189                         if !@skip || $skip[$#skip] > 0; },
2190            qr/^\s* INCLUDE ${index_re} \s* = \s* ${value_re} \s* $/x
2191            => sub { $push_to->(\%includes, $expand_variables->($+{INDEX}),
2192                                undef, undef,
2193                                tokenize($expand_variables->($+{VALUE})))
2194                         if !@skip || $skip[$#skip] > 0; },
2195            qr/^\s* DEFINE ${index_re} \s* = \s* ${value_re} \s* $/x
2196            => sub { $push_to->(\%defines, $expand_variables->($+{INDEX}),
2197                                undef, undef,
2198                                tokenize($expand_variables->($+{VALUE})))
2199                         if !@skip || $skip[$#skip] > 0; },
2200            qr/^\s* DEPEND ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2201            => sub { $push_to->(\%depends, $expand_variables->($+{INDEX}),
2202                                \$attributes{depends}, $+{ATTRIBS},
2203                                tokenize($expand_variables->($+{VALUE})))
2204                         if !@skip || $skip[$#skip] > 0; },
2205            qr/^\s* GENERATE ${index_re} ${attribs_re} \s* = \s* ${value_re} \s* $/x
2206            => sub { $push_to->(\%generate, $expand_variables->($+{INDEX}),
2207                                \$attributes{generate}, $+{ATTRIBS},
2208                                $expand_variables->($+{VALUE}))
2209                         if !@skip || $skip[$#skip] > 0; },
2210            qr/^\s* (?:\#.*)? $/x => sub { },
2211            "OTHERWISE" => sub { die "Something wrong with this line:\n$_\nat $sourced/$f" },
2212            "BEFORE" => sub {
2213                if ($buildinfo_debug) {
2214                    print STDERR "DEBUG: Parsing ",join(" ", @_),"\n";
2215                    print STDERR "DEBUG: ... before parsing, skip stack is ",join(" ", map { int($_) } @skip),"\n";
2216                }
2217            },
2218            "AFTER" => sub {
2219                if ($buildinfo_debug) {
2220                    print STDERR "DEBUG: .... after parsing, skip stack is ",join(" ", map { int($_) } @skip),"\n";
2221                }
2222            },
2223            );
2224        die "runaway IF?" if (@skip);
2225
2226        if (grep { defined $attributes{modules}->{$_}->{engine} } keys %attributes
2227                and !$config{dynamic_engines}) {
2228            die <<"EOF"
2229ENGINES can only be used if configured with 'dynamic-engine'.
2230This is usually a fault in a build.info file.
2231EOF
2232        }
2233
2234        {
2235            my %infos = ( programs  => [ @programs  ],
2236                          libraries => [ @libraries ],
2237                          modules   => [ @modules   ],
2238                          scripts   => [ @scripts   ] );
2239            foreach my $k (keys %infos) {
2240                foreach (@{$infos{$k}}) {
2241                    my $item = cleanfile($buildd, $_, $blddir);
2242                    $unified_info{$k}->{$item} = 1;
2243
2244                    # Fix up associated attributes
2245                    $unified_info{attributes}->{$k}->{$item} =
2246                        $attributes{$k}->{$_}
2247                        if defined $attributes{$k}->{$_};
2248                }
2249            }
2250        }
2251
2252        # Check that we haven't defined any library as both shared and
2253        # explicitly static.  That is forbidden.
2254        my @doubles = ();
2255        foreach (grep /\.a$/, keys %{$unified_info{libraries}}) {
2256            (my $l = $_) =~ s/\.a$//;
2257            push @doubles, $l if defined $unified_info{libraries}->{$l};
2258        }
2259        die "these libraries are both explicitly static and shared:\n  ",
2260            join(" ", @doubles), "\n"
2261            if @doubles;
2262
2263        foreach (keys %sources) {
2264            my $dest = $_;
2265            my $ddest = cleanfile($buildd, $_, $blddir);
2266            foreach (@{$sources{$dest}}) {
2267                my $s = cleanfile($sourced, $_, $blddir);
2268
2269                # If it's generated or we simply don't find it in the source
2270                # tree, we assume it's in the build tree.
2271                if ($s eq $src_configdata || $generate{$_} || ! -f $s) {
2272                    $s = cleanfile($buildd, $_, $blddir);
2273                }
2274                my $o = $_;
2275                # We recognise C++, C and asm files
2276                if ($s =~ /\.(cc|cpp|c|s|S)$/) {
2277                    push @{$check_exist{$s}}, $ddest;
2278                    $o =~ s/\.[csS]$/.o/; # C and assembler
2279                    $o =~ s/\.(cc|cpp)$/_cc.o/; # C++
2280                    $o = cleanfile($buildd, $o, $blddir);
2281                    $unified_info{sources}->{$ddest}->{$o} = -1;
2282                    $unified_info{sources}->{$o}->{$s} = -1;
2283                } elsif ($s =~ /\.rc$/) {
2284                    # We also recognise resource files
2285                    push @{$check_exist{$s}}, $ddest;
2286                    $o =~ s/\.rc$/.res/; # Resource configuration
2287                    $o = cleanfile($buildd, $o, $blddir);
2288                    $unified_info{sources}->{$ddest}->{$o} = -1;
2289                    $unified_info{sources}->{$o}->{$s} = -1;
2290                } else {
2291                    push @{$check_exist{$s}}, $ddest;
2292                    $unified_info{sources}->{$ddest}->{$s} = 1;
2293                }
2294                # Fix up associated attributes
2295                if ($o ne $_) {
2296                    $unified_info{attributes}->{sources}->{$ddest}->{$o} =
2297                        $unified_info{attributes}->{sources}->{$o}->{$s} =
2298                        $attributes{sources}->{$dest}->{$_}
2299                        if defined $attributes{sources}->{$dest}->{$_};
2300                } else {
2301                    $unified_info{attributes}->{sources}->{$ddest}->{$s} =
2302                        $attributes{sources}->{$dest}->{$_}
2303                        if defined $attributes{sources}->{$dest}->{$_};
2304                }
2305            }
2306        }
2307
2308        foreach (keys %shared_sources) {
2309            my $dest = $_;
2310            my $ddest = cleanfile($buildd, $_, $blddir);
2311            foreach (@{$shared_sources{$dest}}) {
2312                my $s = cleanfile($sourced, $_, $blddir);
2313
2314                # If it's generated or we simply don't find it in the source
2315                # tree, we assume it's in the build tree.
2316                if ($s eq $src_configdata || $generate{$_} || ! -f $s) {
2317                    $s = cleanfile($buildd, $_, $blddir);
2318                }
2319
2320                my $o = $_;
2321                if ($s =~ /\.(cc|cpp|c|s|S)$/) {
2322                    # We recognise C++, C and asm files
2323                    push @{$check_exist{$s}}, $ddest;
2324                    $o =~ s/\.[csS]$/.o/; # C and assembler
2325                    $o =~ s/\.(cc|cpp)$/_cc.o/; # C++
2326                    $o = cleanfile($buildd, $o, $blddir);
2327                    $unified_info{shared_sources}->{$ddest}->{$o} = -1;
2328                    $unified_info{sources}->{$o}->{$s} = -1;
2329                } elsif ($s =~ /\.rc$/) {
2330                    # We also recognise resource files
2331                    push @{$check_exist{$s}}, $ddest;
2332                    $o =~ s/\.rc$/.res/; # Resource configuration
2333                    $o = cleanfile($buildd, $o, $blddir);
2334                    $unified_info{shared_sources}->{$ddest}->{$o} = -1;
2335                    $unified_info{sources}->{$o}->{$s} = -1;
2336                } elsif ($s =~ /\.ld$/) {
2337                    # We also recognise linker scripts (or corresponding)
2338                    # We know they are generated files
2339                    push @{$check_exist{$s}}, $ddest;
2340                    $o = cleanfile($buildd, $_, $blddir);
2341                    $unified_info{shared_sources}->{$ddest}->{$o} = 1;
2342                } else {
2343                    die "unrecognised source file type for shared library: $s\n";
2344                }
2345                # Fix up associated attributes
2346                if ($o ne $_) {
2347                    $unified_info{attributes}->{shared_sources}->{$ddest}->{$o} =
2348                        $unified_info{attributes}->{sources}->{$o}->{$s} =
2349                        $attributes{sources}->{$dest}->{$_}
2350                        if defined $attributes{sources}->{$dest}->{$_};
2351                } else {
2352                    $unified_info{attributes}->{shared_sources}->{$ddest}->{$o} =
2353                        $attributes{sources}->{$dest}->{$_}
2354                        if defined $attributes{sources}->{$dest}->{$_};
2355                }
2356            }
2357        }
2358
2359        foreach (keys %generate) {
2360            my $dest = $_;
2361            my $ddest = cleanfile($buildd, $_, $blddir);
2362            die "more than one generator for $dest: "
2363                ,join(" ", @{$generate{$_}}),"\n"
2364                if scalar @{$generate{$_}} > 1;
2365            my @generator = split /\s+/, $generate{$dest}->[0];
2366            my $gen = $generator[0];
2367            $generator[0] = cleanfile($sourced, $gen, $blddir);
2368
2369            # If the generator is itself generated, it's in the build tree
2370            if ($generate{$gen} || ! -f $generator[0]) {
2371                $generator[0] = cleanfile($buildd, $gen, $blddir);
2372            }
2373            $check_generate{$ddest}->{$generator[0]}++;
2374
2375            $unified_info{generate}->{$ddest} = [ @generator ];
2376            # Fix up associated attributes
2377            $unified_info{attributes}->{generate}->{$ddest} =
2378                $attributes{generate}->{$dest}->{$gen}
2379                if defined $attributes{generate}->{$dest}->{$gen};
2380        }
2381
2382        foreach (keys %depends) {
2383            my $dest = $_;
2384            my $ddest = $dest;
2385
2386            if ($dest =~ /^\|(.*)\|$/) {
2387                # Collect the raw target
2388                $unified_info{targets}->{$1} = 1;
2389                $ddest = $1;
2390            } elsif ($dest eq '') {
2391                $ddest = '';
2392            } else {
2393                $ddest = cleanfile($sourced, $_, $blddir);
2394
2395                # If the destination doesn't exist in source, it can only be
2396                # a generated file in the build tree.
2397                if ($ddest eq $src_configdata || ! -f $ddest) {
2398                    $ddest = cleanfile($buildd, $_, $blddir);
2399                }
2400            }
2401            foreach (@{$depends{$dest}}) {
2402                my $d = cleanfile($sourced, $_, $blddir);
2403                my $d2 = cleanfile($buildd, $_, $blddir);
2404
2405                # If we know it's generated, or assume it is because we can't
2406                # find it in the source tree, we set file we depend on to be
2407                # in the build tree rather than the source tree.
2408                if ($d eq $src_configdata
2409                    || (grep { $d2 eq $_ }
2410                        keys %{$unified_info{generate}})
2411                    || ! -f $d) {
2412                    $d = $d2;
2413                }
2414                $unified_info{depends}->{$ddest}->{$d} = 1;
2415
2416                # Fix up associated attributes
2417                $unified_info{attributes}->{depends}->{$ddest}->{$d} =
2418                    $attributes{depends}->{$dest}->{$_}
2419                    if defined $attributes{depends}->{$dest}->{$_};
2420            }
2421        }
2422
2423        foreach (keys %includes) {
2424            my $dest = $_;
2425            my $ddest = cleanfile($sourced, $_, $blddir);
2426
2427            # If the destination doesn't exist in source, it can only be
2428            # a generated file in the build tree.
2429            if ($ddest eq $src_configdata || ! -f $ddest) {
2430                $ddest = cleanfile($buildd, $_, $blddir);
2431            }
2432            foreach (@{$includes{$dest}}) {
2433                my $is = cleandir($sourced, $_, $blddir);
2434                my $ib = cleandir($buildd, $_, $blddir);
2435                push @{$unified_info{includes}->{$ddest}->{source}}, $is
2436                    unless grep { $_ eq $is } @{$unified_info{includes}->{$ddest}->{source}};
2437                push @{$unified_info{includes}->{$ddest}->{build}}, $ib
2438                    unless grep { $_ eq $ib } @{$unified_info{includes}->{$ddest}->{build}};
2439            }
2440        }
2441
2442        foreach my $dest (keys %defines) {
2443            my $ddest;
2444
2445            if ($dest ne "") {
2446                $ddest = cleanfile($sourced, $dest, $blddir);
2447
2448                # If the destination doesn't exist in source, it can only
2449                # be a generated file in the build tree.
2450                if (! -f $ddest) {
2451                    $ddest = cleanfile($buildd, $dest, $blddir);
2452                }
2453            }
2454            foreach my $v (@{$defines{$dest}}) {
2455                $v =~ m|^([^=]*)(=.*)?$|;
2456                die "0 length macro name not permitted\n" if $1 eq "";
2457                if ($dest ne "") {
2458                    die "$1 defined more than once\n"
2459                        if defined $unified_info{defines}->{$ddest}->{$1};
2460                    $unified_info{defines}->{$ddest}->{$1} = $2;
2461                } else {
2462                    die "$1 defined more than once\n"
2463                        if grep { $v eq $_ } @{$config{defines}};
2464                    push @{$config{defines}}, $v;
2465                }
2466            }
2467        }
2468
2469        foreach my $section (keys %imagedocs) {
2470            foreach (@{$imagedocs{$section}}) {
2471                my $imagedocs = cleanfile($buildd, $_, $blddir);
2472                $unified_info{imagedocs}->{$section}->{$imagedocs} = 1;
2473            }
2474        }
2475
2476        foreach my $section (keys %htmldocs) {
2477            foreach (@{$htmldocs{$section}}) {
2478                my $htmldocs = cleanfile($buildd, $_, $blddir);
2479                $unified_info{htmldocs}->{$section}->{$htmldocs} = 1;
2480            }
2481        }
2482
2483        foreach my $section (keys %mandocs) {
2484            foreach (@{$mandocs{$section}}) {
2485                my $mandocs = cleanfile($buildd, $_, $blddir);
2486                $unified_info{mandocs}->{$section}->{$mandocs} = 1;
2487            }
2488        }
2489    }
2490
2491    my $ordinals_text = join(', ', sort keys %ordinals);
2492    warn <<"EOF" if $ordinals_text;
2493
2494WARNING: ORDINALS were specified for $ordinals_text
2495They are ignored and should be replaced with a combination of GENERATE,
2496DEPEND and SHARED_SOURCE.
2497EOF
2498
2499    # Check that each generated file is only generated once
2500    my $ambiguous_generation = 0;
2501    foreach (sort keys %check_generate) {
2502        my @generators = sort keys %{$check_generate{$_}};
2503        my $generators_txt = join(', ', @generators);
2504        if (scalar @generators > 1) {
2505            warn "$_ is GENERATEd by more than one generator ($generators_txt)\n";
2506            $ambiguous_generation++;
2507        }
2508        if ($check_generate{$_}->{$generators[0]} > 1) {
2509            warn "INFO: $_ has more than one GENERATE declaration (same generator)\n"
2510        }
2511    }
2512    die "There are ambiguous source file generations\n"
2513        if $ambiguous_generation > 0;
2514
2515    # All given source files should exist, or if generated, their
2516    # generator should exist.  This loop ensures this is true.
2517    my $missing = 0;
2518    foreach my $orig (sort keys %check_exist) {
2519        foreach my $dest (@{$check_exist{$orig}}) {
2520            if ($orig ne $src_configdata) {
2521                if ($orig =~ /\.a$/) {
2522                    # Static library names may be used as sources, so we
2523                    # need to detect those and give them special treatment.
2524                    unless (grep { $_ eq $orig }
2525                            keys %{$unified_info{libraries}}) {
2526                        warn "$orig is given as source for $dest, but no such library is built\n";
2527                        $missing++;
2528                    }
2529                } else {
2530                    # A source may be generated, and its generator may be
2531                    # generated as well.  We therefore loop to dig out the
2532                    # first generator.
2533                    my $gen = $orig;
2534
2535                    while (my @next = keys %{$check_generate{$gen}}) {
2536                        $gen = $next[0];
2537                    }
2538
2539                    if (! -f $gen) {
2540                        if ($gen ne $orig) {
2541                            $missing++;
2542                            warn "$orig is given as source for $dest, but its generator (leading to $gen) is missing\n";
2543                        } else {
2544                            $missing++;
2545                            warn "$orig is given as source for $dest, but is missing\n";
2546                        }
2547                    }
2548                }
2549            }
2550        }
2551    }
2552    die "There are files missing\n" if $missing > 0;
2553
2554    # Go through the sources of all libraries and check that the same basename
2555    # doesn't appear more than once.  Some static library archivers depend on
2556    # them being unique.
2557    {
2558        my $err = 0;
2559        foreach my $prod (keys %{$unified_info{libraries}}) {
2560            my @prod_sources =
2561                map { keys %{$unified_info{sources}->{$_}} }
2562                keys %{$unified_info{sources}->{$prod}};
2563            my %srccnt = ();
2564
2565            # Count how many times a given each source basename
2566            # appears for each product.
2567            foreach my $src (@prod_sources) {
2568                $srccnt{basename $src}++;
2569            }
2570
2571            foreach my $src (keys %srccnt) {
2572                if ((my $cnt = $srccnt{$src}) > 1) {
2573                    print STDERR "$src appears $cnt times for the product $prod\n";
2574                    $err++
2575                }
2576            }
2577        }
2578        die if $err > 0;
2579    }
2580
2581    # Massage the result
2582
2583    # If we depend on a header file or a perl module, add an inclusion of
2584    # its directory to allow smoothe inclusion
2585    foreach my $dest (keys %{$unified_info{depends}}) {
2586        next if $dest eq "";
2587        foreach my $d (keys %{$unified_info{depends}->{$dest}}) {
2588            next unless $d =~ /\.(h|pm)$/;
2589            my $i = dirname($d);
2590            my $spot =
2591                $d eq "configdata.pm" || defined($unified_info{generate}->{$d})
2592                ? 'build' : 'source';
2593            push @{$unified_info{includes}->{$dest}->{$spot}}, $i
2594                unless grep { $_ eq $i } @{$unified_info{includes}->{$dest}->{$spot}};
2595        }
2596    }
2597
2598    # Go through all intermediary files and change their names to something that
2599    # reflects what they will be built for.  Note that for some source files,
2600    # this leads to duplicate object files because they are used multiple times.
2601    # the goal is to rename all object files according to this scheme:
2602    #    {productname}-{midfix}-{origobjname}.[o|res]
2603    # the {midfix} is a keyword indicating the type of product, which is mostly
2604    # valuable for libraries since they come in two forms.
2605    #
2606    # This also reorganises the {sources} and {shared_sources} so that the
2607    # former only contains ALL object files that are supposed to end up in
2608    # static libraries and programs, while the latter contains ALL object files
2609    # that are supposed to end up in shared libraries and DSOs.
2610    # The main reason for having two different source structures is to allow
2611    # the same name to be used for the static and the shared variants of a
2612    # library.
2613    {
2614        # Take copies so we don't get interference from added stuff
2615        my %unified_copy = ();
2616        foreach (('sources', 'shared_sources')) {
2617            $unified_copy{$_} = { %{$unified_info{$_}} }
2618                if defined($unified_info{$_});
2619            delete $unified_info{$_};
2620        }
2621        foreach my $prodtype (('programs', 'libraries', 'modules', 'scripts')) {
2622            # $intent serves multi purposes:
2623            # - give a prefix for the new object files names
2624            # - in the case of libraries, rearrange the object files so static
2625            #   libraries use the 'sources' structure exclusively, while shared
2626            #   libraries use the 'shared_sources' structure exclusively.
2627            my $intent = {
2628                programs  => { bin    => { src => [ 'sources' ],
2629                                           dst => 'sources' } },
2630                libraries => { lib    => { src => [ 'sources' ],
2631                                           dst => 'sources' },
2632                               shlib  => { prodselect =>
2633                                               sub { grep !/\.a$/, @_ },
2634                                           src => [ 'sources',
2635                                                    'shared_sources' ],
2636                                           dst => 'shared_sources' } },
2637                modules   => { dso    => { src => [ 'sources' ],
2638                                           dst => 'sources' } },
2639                scripts   => { script => { src => [ 'sources' ],
2640                                           dst => 'sources' } }
2641               } -> {$prodtype};
2642            foreach my $kind (keys %$intent) {
2643                next if ($intent->{$kind}->{dst} eq 'shared_sources'
2644                             && $disabled{shared});
2645
2646                my @src = @{$intent->{$kind}->{src}};
2647                my $dst = $intent->{$kind}->{dst};
2648                my $prodselect = $intent->{$kind}->{prodselect} // sub { @_ };
2649                foreach my $prod ($prodselect->(keys %{$unified_info{$prodtype}})) {
2650                    # %prod_sources has all applicable objects as keys, and
2651                    # their corresponding sources as values
2652                    my %prod_sources =
2653                        map { $_ => [ keys %{$unified_copy{sources}->{$_}} ] }
2654                        map { keys %{$unified_copy{$_}->{$prod}} }
2655                        @src;
2656                    foreach (keys %prod_sources) {
2657                        # Only affect object files and resource files,
2658                        # the others simply get a new value
2659                        # (+1 instead of -1)
2660                        if ($_ =~ /\.(o|res)$/) {
2661                            (my $prodname = $prod) =~ s|\.a$||;
2662                            my $newobj =
2663                                catfile(dirname($_),
2664                                        basename($prodname)
2665                                            . '-' . $kind
2666                                            . '-' . basename($_));
2667                            $unified_info{$dst}->{$prod}->{$newobj} = 1;
2668                            foreach my $src (@{$prod_sources{$_}}) {
2669                                $unified_info{sources}->{$newobj}->{$src} = 1;
2670                                # Adjust source attributes
2671                                my $attrs = $unified_info{attributes}->{sources};
2672                                if (defined $attrs->{$prod}
2673                                    && defined $attrs->{$prod}->{$_}) {
2674                                    $attrs->{$prod}->{$newobj} =
2675                                        $attrs->{$prod}->{$_};
2676                                    delete $attrs->{$prod}->{$_};
2677                                }
2678                                foreach my $objsrc (keys %{$attrs->{$_} // {}}) {
2679                                    $attrs->{$newobj}->{$objsrc} =
2680                                        $attrs->{$_}->{$objsrc};
2681                                    delete $attrs->{$_}->{$objsrc};
2682                                }
2683                            }
2684                            # Adjust dependencies
2685                            foreach my $deps (keys %{$unified_info{depends}->{$_}}) {
2686                                $unified_info{depends}->{$_}->{$deps} = -1;
2687                                $unified_info{depends}->{$newobj}->{$deps} = 1;
2688                            }
2689                            # Adjust includes
2690                            foreach my $k (('source', 'build')) {
2691                                next unless
2692                                    defined($unified_info{includes}->{$_}->{$k});
2693                                my @incs = @{$unified_info{includes}->{$_}->{$k}};
2694                                $unified_info{includes}->{$newobj}->{$k} = [ @incs ];
2695                            }
2696                        } else {
2697                            $unified_info{$dst}->{$prod}->{$_} = 1;
2698                        }
2699                    }
2700                }
2701            }
2702        }
2703    }
2704
2705    # At this point, we have a number of sources with the value -1.  They
2706    # aren't part of the local build and are probably meant for a different
2707    # platform, and can therefore be cleaned away.  That happens when making
2708    # %unified_info more efficient below.
2709
2710    ### Make unified_info a bit more efficient
2711    # One level structures
2712    foreach (("programs", "libraries", "modules", "scripts", "targets")) {
2713        $unified_info{$_} = [ sort keys %{$unified_info{$_}} ];
2714    }
2715    # Two level structures
2716    foreach my $l1 (("sources", "shared_sources", "ldadd", "depends",
2717                     "imagedocs", "htmldocs", "mandocs")) {
2718        foreach my $l2 (sort keys %{$unified_info{$l1}}) {
2719            my @items =
2720                sort
2721                grep { $unified_info{$l1}->{$l2}->{$_} > 0 }
2722                keys %{$unified_info{$l1}->{$l2}};
2723            if (@items) {
2724                $unified_info{$l1}->{$l2} = [ @items ];
2725            } else {
2726                delete $unified_info{$l1}->{$l2};
2727            }
2728        }
2729    }
2730    # Defines
2731    foreach my $dest (sort keys %{$unified_info{defines}}) {
2732        $unified_info{defines}->{$dest}
2733            = [ map { $_.$unified_info{defines}->{$dest}->{$_} }
2734                sort keys %{$unified_info{defines}->{$dest}} ];
2735    }
2736    # Includes
2737    foreach my $dest (sort keys %{$unified_info{includes}}) {
2738        if (defined($unified_info{includes}->{$dest}->{build})) {
2739            my @source_includes = ();
2740            @source_includes = ( @{$unified_info{includes}->{$dest}->{source}} )
2741                if defined($unified_info{includes}->{$dest}->{source});
2742            $unified_info{includes}->{$dest} =
2743                [ @{$unified_info{includes}->{$dest}->{build}} ];
2744            foreach my $inc (@source_includes) {
2745                push @{$unified_info{includes}->{$dest}}, $inc
2746                    unless grep { $_ eq $inc } @{$unified_info{includes}->{$dest}};
2747            }
2748        } elsif (defined($unified_info{includes}->{$dest}->{source})) {
2749            $unified_info{includes}->{$dest} =
2750                [ @{$unified_info{includes}->{$dest}->{source}} ];
2751        } else {
2752            delete $unified_info{includes}->{$dest};
2753        }
2754    }
2755
2756    # For convenience collect information regarding directories where
2757    # files are generated, those generated files and the end product
2758    # they end up in where applicable.  Then, add build rules for those
2759    # directories
2760    my %loopinfo = ( "lib" => [ @{$unified_info{libraries}} ],
2761                     "dso" => [ @{$unified_info{modules}} ],
2762                     "bin" => [ @{$unified_info{programs}} ],
2763                     "script" => [ @{$unified_info{scripts}} ],
2764                     "docs" => [ (map { @{$unified_info{imagedocs}->{$_} // []} }
2765                                  keys %{$unified_info{imagedocs} // {}}),
2766                                 (map { @{$unified_info{htmldocs}->{$_} // []} }
2767                                  keys %{$unified_info{htmldocs} // {}}),
2768                                 (map { @{$unified_info{mandocs}->{$_} // []} }
2769                                  keys %{$unified_info{mandocs} // {}}) ] );
2770    foreach my $type (sort keys %loopinfo) {
2771        foreach my $product (@{$loopinfo{$type}}) {
2772            my %dirs = ();
2773            my $pd = dirname($product);
2774
2775            foreach (@{$unified_info{sources}->{$product} // []},
2776                     @{$unified_info{shared_sources}->{$product} // []}) {
2777                my $d = dirname($_);
2778
2779                # We don't want to create targets for source directories
2780                # when building out of source
2781                next if ($config{sourcedir} ne $config{builddir}
2782                             && $d =~ m|^\Q$config{sourcedir}\E|);
2783                # We already have a "test" target, and the current directory
2784                # is just silly to make a target for
2785                next if $d eq "test" || $d eq ".";
2786
2787                $dirs{$d} = 1;
2788                push @{$unified_info{dirinfo}->{$d}->{deps}}, $_
2789                    if $d ne $pd;
2790            }
2791            foreach (sort keys %dirs) {
2792                push @{$unified_info{dirinfo}->{$_}->{products}->{$type}},
2793                    $product;
2794            }
2795        }
2796    }
2797}
2798
2799# For the schemes that need it, we provide the old *_obj configs
2800# from the *_asm_obj ones
2801foreach (grep /_(asm|aux)_src$/, keys %target) {
2802    my $src = $_;
2803    (my $obj = $_) =~ s/_(asm|aux)_src$/_obj/;
2804    $target{$obj} = $target{$src};
2805    $target{$obj} =~ s/\.[csS]\b/.o/g; # C and assembler
2806    $target{$obj} =~ s/\.(cc|cpp)\b/_cc.o/g; # C++
2807}
2808
2809# Write down our configuration where it fits #########################
2810
2811my %template_vars = (
2812    config => \%config,
2813    target => \%target,
2814    disablables => \@disablables,
2815    disablables_int => \@disablables_int,
2816    disabled => \%disabled,
2817    withargs => \%withargs,
2818    unified_info => \%unified_info,
2819    tls => \@tls,
2820    dtls => \@dtls,
2821    makevars => [ sort keys %user ],
2822    disabled_info => \%disabled_info,
2823    user_crossable => \@user_crossable,
2824);
2825my $configdata_outname = 'configdata.pm';
2826open CONFIGDATA, ">$configdata_outname.new"
2827    or die "Trying to create $configdata_outname.new: $!";
2828my $configdata_tmplname = cleanfile($srcdir, "configdata.pm.in", $blddir);
2829my $configdata_tmpl =
2830    OpenSSL::Template->new(TYPE => 'FILE', SOURCE => $configdata_tmplname);
2831$configdata_tmpl->fill_in(
2832    FILENAME => $configdata_tmplname,
2833    OUTPUT => \*CONFIGDATA,
2834    HASH => { %template_vars,
2835              autowarntext => [
2836                  'WARNING: do not edit!',
2837                  "Generated by Configure from $configdata_tmplname",
2838              ] }
2839) or die $Text::Template::ERROR;
2840close CONFIGDATA;
2841
2842rename "$configdata_outname.new", $configdata_outname;
2843if ($builder_platform eq 'unix') {
2844    my $mode = (0755 & ~umask);
2845    chmod $mode, 'configdata.pm'
2846        or warn sprintf("WARNING: Couldn't change mode for 'configdata.pm' to 0%03o: %s\n",$mode,$!);
2847}
2848print "Created $configdata_outname\n";
2849
2850print "Running $configdata_outname\n";
2851my $perlcmd = (quotify("maybeshell", $config{PERL}))[0];
2852my $cmd = "$perlcmd $configdata_outname";
2853#print STDERR "DEBUG[run_dofile]: \$cmd = $cmd\n";
2854system($cmd);
2855exit 1 if $? != 0;
2856
2857$SIG{__DIE__} = $orig_death_handler;
2858
2859print <<"EOF" if ($disabled{threads} eq "unavailable");
2860
2861The library could not be configured for supporting multi-threaded
2862applications as the compiler options required on this system are not known.
2863See file INSTALL.md for details if you need multi-threading.
2864EOF
2865
2866print <<"EOF" if ($no_shared_warn);
2867
2868The options 'shared', 'pic' and 'dynamic-engine' aren't supported on this
2869platform, so we will pretend you gave the option 'no-pic', which also disables
2870'shared' and 'dynamic-engine'.  If you know how to implement shared libraries
2871or position independent code, please let us know (but please first make sure
2872you have tried with a current version of OpenSSL).
2873EOF
2874
2875print $banner;
2876
2877exit(0);
2878
2879######################################################################
2880#
2881# Helpers and utility functions
2882#
2883
2884# Death handler, to print a helpful message in case of failure #######
2885#
2886sub death_handler {
2887    die @_ if $^S;              # To prevent the added message in eval blocks
2888    my $build_file = $config{build_file} // "build file";
2889    my @message = ( <<"_____", @_ );
2890
2891Failure!  $build_file wasn't produced.
2892Please read INSTALL.md and associated NOTES-* files.  You may also have to
2893look over your available compiler tool chain or change your configuration.
2894
2895_____
2896
2897    # Dying is terminal, so it's ok to reset the signal handler here.
2898    $SIG{__DIE__} = $orig_death_handler;
2899    die @message;
2900}
2901
2902# Configuration file reading #########################################
2903
2904# Note: All of the helper functions are for lazy evaluation.  They all
2905# return a CODE ref, which will return the intended value when evaluated.
2906# Thus, whenever there's mention of a returned value, it's about that
2907# intended value.
2908
2909# Helper function to implement conditional value variants, with a default
2910# plus additional values based on the value of $config{build_type}.
2911# Arguments are given in hash table form:
2912#
2913#       picker(default => "Basic string: ",
2914#              debug   => "debug",
2915#              release => "release")
2916#
2917# When configuring with --debug, the resulting string will be
2918# "Basic string: debug", and when not, it will be "Basic string: release"
2919#
2920# This can be used to create variants of sets of flags according to the
2921# build type:
2922#
2923#       cflags => picker(default => "-Wall",
2924#                        debug   => "-g -O0",
2925#                        release => "-O3")
2926#
2927sub picker {
2928    my %opts = @_;
2929    return sub { add($opts{default} || (),
2930                     $opts{$config{build_type}} || ())->(); }
2931}
2932
2933# Helper function to combine several values of different types into one.
2934# This is useful if you want to combine a string with the result of a
2935# lazy function, such as:
2936#
2937#       cflags => combine("-Wall", sub { $disabled{zlib} ? () : "-DZLIB" })
2938#
2939sub combine {
2940    my @stuff = @_;
2941    return sub { add(@stuff)->(); }
2942}
2943
2944# Helper function to implement conditional values depending on the value
2945# of $disabled{threads}.  Can be used as follows:
2946#
2947#       cflags => combine("-Wall", threads("-pthread"))
2948#
2949sub threads {
2950    my @flags = @_;
2951    return sub { add($disabled{threads} ? () : @flags)->(); }
2952}
2953
2954sub shared {
2955    my @flags = @_;
2956    return sub { add($disabled{shared} ? () : @flags)->(); }
2957}
2958
2959our $add_called = 0;
2960# Helper function to implement adding values to already existing configuration
2961# values.  It handles elements that are ARRAYs, CODEs and scalars
2962sub _add {
2963    my $separator = shift;
2964
2965    # If there's any ARRAY in the collection of values OR the separator
2966    # is undef, we will return an ARRAY of combined values, otherwise a
2967    # string of joined values with $separator as the separator.
2968    my $found_array = !defined($separator);
2969
2970    my @values =
2971        map {
2972            my $res = $_;
2973            while (ref($res) eq "CODE") {
2974                $res = $res->();
2975            }
2976            if (defined($res)) {
2977                if (ref($res) eq "ARRAY") {
2978                    $found_array = 1;
2979                    @$res;
2980                } else {
2981                    $res;
2982                }
2983            } else {
2984                ();
2985            }
2986    } (@_);
2987
2988    $add_called = 1;
2989
2990    if ($found_array) {
2991        [ @values ];
2992    } else {
2993        join($separator, grep { defined($_) && $_ ne "" } @values);
2994    }
2995}
2996sub add_before {
2997    my $separator = " ";
2998    if (ref($_[$#_]) eq "HASH") {
2999        my $opts = pop;
3000        $separator = $opts->{separator};
3001    }
3002    my @x = @_;
3003    sub { _add($separator, @x, @_) };
3004}
3005sub add {
3006    my $separator = " ";
3007    if (ref($_[$#_]) eq "HASH") {
3008        my $opts = pop;
3009        $separator = $opts->{separator};
3010    }
3011    my @x = @_;
3012    sub { _add($separator, @_, @x) };
3013}
3014
3015sub read_eval_file {
3016    my $fname = shift;
3017    my $content;
3018    my @result;
3019
3020    open F, "< $fname" or die "Can't open '$fname': $!\n";
3021    {
3022        undef local $/;
3023        $content = <F>;
3024    }
3025    close F;
3026    {
3027        local $@;
3028
3029        @result = ( eval $content );
3030        warn $@ if $@;
3031    }
3032    return wantarray ? @result : $result[0];
3033}
3034
3035# configuration reader, evaluates the input file as a perl script and expects
3036# it to fill %targets with target configurations.  Those are then added to
3037# %table.
3038sub read_config {
3039    my $fname = shift;
3040    my %targets;
3041
3042    {
3043        # Protect certain tables from tampering
3044        local %table = ();
3045
3046        %targets = read_eval_file($fname);
3047    }
3048    my %preexisting = ();
3049    foreach (sort keys %targets) {
3050        $preexisting{$_} = 1 if $table{$_};
3051    }
3052    die <<"EOF",
3053The following config targets from $fname
3054shadow pre-existing config targets with the same name:
3055EOF
3056        map { "  $_\n" } sort keys %preexisting
3057        if %preexisting;
3058
3059
3060    # For each target, check that it's configured with a hash table.
3061    foreach (keys %targets) {
3062        if (ref($targets{$_}) ne "HASH") {
3063            if (ref($targets{$_}) eq "") {
3064                warn "Deprecated target configuration for $_, ignoring...\n";
3065            } else {
3066                warn "Misconfigured target configuration for $_ (should be a hash table), ignoring...\n";
3067            }
3068            delete $targets{$_};
3069        } else {
3070            $targets{$_}->{_conf_fname_int} = add([ $fname ]);
3071        }
3072    }
3073
3074    %table = (%table, %targets);
3075
3076}
3077
3078# configuration resolver.  Will only resolve all the lazy evaluation
3079# codeblocks for the chosen target and all those it inherits from,
3080# recursively
3081sub resolve_config {
3082    my $target = shift;
3083    my @breadcrumbs = @_;
3084
3085#    my $extra_checks = defined($ENV{CONFIGURE_EXTRA_CHECKS});
3086
3087    if (grep { $_ eq $target } @breadcrumbs) {
3088        die "inherit_from loop!  target backtrace:\n  "
3089            ,$target,"\n  ",join("\n  ", @breadcrumbs),"\n";
3090    }
3091
3092    if (!defined($table{$target})) {
3093        warn "Warning! target $target doesn't exist!\n";
3094        return ();
3095    }
3096    # Recurse through all inheritances.  They will be resolved on the
3097    # fly, so when this operation is done, they will all just be a
3098    # bunch of attributes with string values.
3099    # What we get here, though, are keys with references to lists of
3100    # the combined values of them all.  We will deal with lists after
3101    # this stage is done.
3102    my %combined_inheritance = ();
3103    if ($table{$target}->{inherit_from}) {
3104        my @inherit_from =
3105            map { ref($_) eq "CODE" ? $_->() : $_ } @{$table{$target}->{inherit_from}};
3106        foreach (@inherit_from) {
3107            my %inherited_config = resolve_config($_, $target, @breadcrumbs);
3108
3109            # 'template' is a marker that's considered private to
3110            # the config that had it.
3111            delete $inherited_config{template};
3112
3113            foreach (keys %inherited_config) {
3114                if (!$combined_inheritance{$_}) {
3115                    $combined_inheritance{$_} = [];
3116                }
3117                push @{$combined_inheritance{$_}}, $inherited_config{$_};
3118            }
3119        }
3120    }
3121
3122    # We won't need inherit_from in this target any more, since we've
3123    # resolved all the inheritances that lead to this
3124    delete $table{$target}->{inherit_from};
3125
3126    # Now is the time to deal with those lists.  Here's the place to
3127    # decide what shall be done with those lists, all based on the
3128    # values of the target we're currently dealing with.
3129    # - If a value is a coderef, it will be executed with the list of
3130    #   inherited values as arguments.
3131    # - If the corresponding key doesn't have a value at all or is the
3132    #   empty string, the inherited value list will be run through the
3133    #   default combiner (below), and the result becomes this target's
3134    #   value.
3135    # - Otherwise, this target's value is assumed to be a string that
3136    #   will simply override the inherited list of values.
3137    my $default_combiner = add();
3138
3139    my %all_keys =
3140        map { $_ => 1 } (keys %combined_inheritance,
3141                         keys %{$table{$target}});
3142
3143    sub process_values {
3144        my $object    = shift;
3145        my $inherited = shift;  # Always a [ list ]
3146        my $target    = shift;
3147        my $entry     = shift;
3148
3149        $add_called = 0;
3150
3151        while(ref($object) eq "CODE") {
3152            $object = $object->(@$inherited);
3153        }
3154        if (!defined($object)) {
3155            return ();
3156        }
3157        elsif (ref($object) eq "ARRAY") {
3158            local $add_called;  # To make sure recursive calls don't affect it
3159            return [ map { process_values($_, $inherited, $target, $entry) }
3160                     @$object ];
3161        } elsif (ref($object) eq "") {
3162            return $object;
3163        } else {
3164            die "cannot handle reference type ",ref($object)
3165                ," found in target ",$target," -> ",$entry,"\n";
3166        }
3167    }
3168
3169    foreach my $key (sort keys %all_keys) {
3170        my $previous = $combined_inheritance{$key};
3171
3172        # Current target doesn't have a value for the current key?
3173        # Assign it the default combiner, the rest of this loop body
3174        # will handle it just like any other coderef.
3175        if (!exists $table{$target}->{$key}) {
3176            $table{$target}->{$key} = $default_combiner;
3177        }
3178
3179        $table{$target}->{$key} = process_values($table{$target}->{$key},
3180                                               $combined_inheritance{$key},
3181                                               $target, $key);
3182        unless(defined($table{$target}->{$key})) {
3183            delete $table{$target}->{$key};
3184        }
3185#        if ($extra_checks &&
3186#            $previous && !($add_called ||  $previous ~~ $table{$target}->{$key})) {
3187#            warn "$key got replaced in $target\n";
3188#        }
3189    }
3190
3191    # Finally done, return the result.
3192    return %{$table{$target}};
3193}
3194
3195sub usage
3196        {
3197        print STDERR $usage;
3198        print STDERR "\npick os/compiler from:\n";
3199        my $j=0;
3200        my $i;
3201        my $k=0;
3202        foreach $i (sort keys %table)
3203                {
3204                next if $table{$i}->{template};
3205                next if $i =~ /^debug/;
3206                $k += length($i) + 1;
3207                if ($k > 78)
3208                        {
3209                        print STDERR "\n";
3210                        $k=length($i);
3211                        }
3212                print STDERR $i . " ";
3213                }
3214        foreach $i (sort keys %table)
3215                {
3216                next if $table{$i}->{template};
3217                next if $i !~ /^debug/;
3218                $k += length($i) + 1;
3219                if ($k > 78)
3220                        {
3221                        print STDERR "\n";
3222                        $k=length($i);
3223                        }
3224                print STDERR $i . " ";
3225                }
3226        exit(1);
3227        }
3228
3229sub compiler_predefined {
3230    state %predefined;
3231    my $cc = shift;
3232
3233    return () if $^O eq 'VMS';
3234
3235    die 'compiler_predefined called without a compiler command'
3236        unless $cc;
3237
3238    if (! $predefined{$cc}) {
3239
3240        $predefined{$cc} = {};
3241
3242        # collect compiler pre-defines from gcc or gcc-alike...
3243        open(PIPE, "$cc -dM -E -x c /dev/null 2>&1 |");
3244        while (my $l = <PIPE>) {
3245            $l =~ m/^#define\s+(\w+(?:\(\w+\))?)(?:\s+(.+))?/ or last;
3246            $predefined{$cc}->{$1} = $2 // '';
3247        }
3248        close(PIPE);
3249    }
3250
3251    return %{$predefined{$cc}};
3252}
3253
3254sub which
3255{
3256    my ($name)=@_;
3257
3258    if (eval { require IPC::Cmd; 1; }) {
3259        IPC::Cmd->import();
3260        return scalar IPC::Cmd::can_run($name);
3261    } else {
3262        # if there is $directories component in splitpath,
3263        # then it's not something to test with $PATH...
3264        return $name if (File::Spec->splitpath($name))[1];
3265
3266        foreach (File::Spec->path()) {
3267            my $fullpath = catfile($_, "$name$target{exe_extension}");
3268            if (-f $fullpath and -x $fullpath) {
3269                return $fullpath;
3270            }
3271        }
3272    }
3273}
3274
3275sub env
3276{
3277    my $name = shift;
3278    my %opts = @_;
3279
3280    unless ($opts{cacheonly}) {
3281        # Note that if $ENV{$name} doesn't exist or is undefined,
3282        # $config{perlenv}->{$name} will be created with the value
3283        # undef.  This is intentional.
3284
3285        $config{perlenv}->{$name} = $ENV{$name}
3286            if ! exists $config{perlenv}->{$name};
3287    }
3288    return $config{perlenv}->{$name};
3289}
3290
3291# Configuration printer ##############################################
3292
3293sub print_table_entry
3294{
3295    local $now_printing = shift;
3296    my %target = resolve_config($now_printing);
3297    my $type = shift;
3298
3299    # Don't print the templates
3300    return if $target{template};
3301
3302    my @sequence = (
3303        "sys_id",
3304        "cpp",
3305        "cppflags",
3306        "defines",
3307        "includes",
3308        "cc",
3309        "cflags",
3310        "ld",
3311        "lflags",
3312        "loutflag",
3313        "ex_libs",
3314        "bn_ops",
3315        "enable",
3316        "disable",
3317        "poly1035_asm_src",
3318        "thread_scheme",
3319        "perlasm_scheme",
3320        "dso_scheme",
3321        "shared_target",
3322        "shared_cflag",
3323        "shared_defines",
3324        "shared_ldflag",
3325        "shared_rcflag",
3326        "shared_extension",
3327        "dso_extension",
3328        "obj_extension",
3329        "exe_extension",
3330        "ranlib",
3331        "ar",
3332        "arflags",
3333        "aroutflag",
3334        "rc",
3335        "rcflags",
3336        "rcoutflag",
3337        "mt",
3338        "mtflags",
3339        "mtinflag",
3340        "mtoutflag",
3341        "multilib",
3342        "build_scheme",
3343        );
3344
3345    if ($type eq "TABLE") {
3346        print "\n";
3347        print "*** $now_printing\n";
3348        foreach (@sequence) {
3349            if (ref($target{$_}) eq "ARRAY") {
3350                printf "\$%-12s = %s\n", $_, join(" ", @{$target{$_}});
3351            } else {
3352                printf "\$%-12s = %s\n", $_, $target{$_};
3353            }
3354        }
3355    } elsif ($type eq "HASH") {
3356        my $largest =
3357            length((sort { length($a) <=> length($b) } @sequence)[-1]);
3358        print "    '$now_printing' => {\n";
3359        foreach (@sequence) {
3360            if ($target{$_}) {
3361                if (ref($target{$_}) eq "ARRAY") {
3362                    print "      '",$_,"'"," " x ($largest - length($_))," => [ ",join(", ", map { "'$_'" } @{$target{$_}})," ],\n";
3363                } else {
3364                    print "      '",$_,"'"," " x ($largest - length($_))," => '",$target{$_},"',\n";
3365                }
3366            }
3367        }
3368        print "    },\n";
3369    }
3370}
3371
3372# Utility routines ###################################################
3373
3374# On VMS, if the given file is a logical name, File::Spec::Functions
3375# will consider it an absolute path.  There are cases when we want a
3376# purely syntactic check without checking the environment.
3377sub isabsolute {
3378    my $file = shift;
3379
3380    # On non-platforms, we just use file_name_is_absolute().
3381    return file_name_is_absolute($file) unless $^O eq "VMS";
3382
3383    # If the file spec includes a device or a directory spec,
3384    # file_name_is_absolute() is perfectly safe.
3385    return file_name_is_absolute($file) if $file =~ m|[:\[]|;
3386
3387    # Here, we know the given file spec isn't absolute
3388    return 0;
3389}
3390
3391# Makes a directory absolute and cleans out /../ in paths like foo/../bar
3392# On some platforms, this uses rel2abs(), while on others, realpath() is used.
3393# realpath() requires that at least all path components except the last is an
3394# existing directory.  On VMS, the last component of the directory spec must
3395# exist.
3396sub absolutedir {
3397    my $dir = shift;
3398
3399    # realpath() is quite buggy on VMS.  It uses LIB$FID_TO_NAME, which
3400    # will return the volume name for the device, no matter what.  Also,
3401    # it will return an incorrect directory spec if the argument is a
3402    # directory that doesn't exist.
3403    if ($^O eq "VMS") {
3404        return rel2abs($dir);
3405    }
3406
3407    # We use realpath() on Unix, since no other will properly clean out
3408    # a directory spec.
3409    use Cwd qw/realpath/;
3410
3411    return realpath($dir);
3412}
3413
3414# Check if all paths are one and the same, using stat.  They must both exist
3415# We need this for the cases when File::Spec doesn't detect case insensitivity
3416# (File::Spec::Unix assumes case sensitivity)
3417sub samedir {
3418    die "samedir expects two arguments\n" unless scalar @_ == 2;
3419
3420    my @stat0 = stat($_[0]);    # First argument
3421    my @stat1 = stat($_[1]);    # Second argument
3422
3423    die "Couldn't stat $_[0]" unless @stat0;
3424    die "Couldn't stat $_[1]" unless @stat1;
3425
3426    # Compare device number
3427    return 0 unless ($stat0[0] == $stat1[0]);
3428    # Compare "inode".  The perl manual recommends comparing as
3429    # string rather than as number.
3430    return 0 unless ($stat0[1] eq $stat1[1]);
3431
3432    return 1;                   # All the same
3433}
3434
3435sub quotify {
3436    my %processors = (
3437        perl    => sub { my $x = shift;
3438                         $x =~ s/([\\\$\@"])/\\$1/g;
3439                         return '"'.$x.'"'; },
3440        maybeshell => sub { my $x = shift;
3441                            (my $y = $x) =~ s/([\\\"])/\\$1/g;
3442                            if ($x ne $y || $x =~ m|\s|) {
3443                                return '"'.$y.'"';
3444                            } else {
3445                                return $x;
3446                            }
3447                        },
3448        );
3449    my $for = shift;
3450    my $processor =
3451        defined($processors{$for}) ? $processors{$for} : sub { shift; };
3452
3453    return map { $processor->($_); } @_;
3454}
3455
3456# collect_from_file($filename, $line_concat_cond_re, $line_concat)
3457# $filename is a file name to read from
3458# $line_concat_cond_re is a regexp detecting a line continuation ending
3459# $line_concat is a CODEref that takes care of concatenating two lines
3460sub collect_from_file {
3461    my $filename = shift;
3462    my $line_concat_cond_re = shift;
3463    my $line_concat = shift;
3464
3465    open my $fh, $filename || die "unable to read $filename: $!\n";
3466    return sub {
3467        my $saved_line = "";
3468        $_ = "";
3469        while (<$fh>) {
3470            s|\R$||;
3471            if (defined $line_concat) {
3472                $_ = $line_concat->($saved_line, $_);
3473                $saved_line = "";
3474            }
3475            if (defined $line_concat_cond_re && /$line_concat_cond_re/) {
3476                $saved_line = $_;
3477                next;
3478            }
3479            return $_;
3480        }
3481        die "$filename ending with continuation line\n" if $_;
3482        close $fh;
3483        return undef;
3484    }
3485}
3486
3487# collect_from_array($array, $line_concat_cond_re, $line_concat)
3488# $array is an ARRAYref of lines
3489# $line_concat_cond_re is a regexp detecting a line continuation ending
3490# $line_concat is a CODEref that takes care of concatenating two lines
3491sub collect_from_array {
3492    my $array = shift;
3493    my $line_concat_cond_re = shift;
3494    my $line_concat = shift;
3495    my @array = (@$array);
3496
3497    return sub {
3498        my $saved_line = "";
3499        $_ = "";
3500        while (defined($_ = shift @array)) {
3501            s|\R$||;
3502            if (defined $line_concat) {
3503                $_ = $line_concat->($saved_line, $_);
3504                $saved_line = "";
3505            }
3506            if (defined $line_concat_cond_re && /$line_concat_cond_re/) {
3507                $saved_line = $_;
3508                next;
3509            }
3510            return $_;
3511        }
3512        die "input text ending with continuation line\n" if $_;
3513        return undef;
3514    }
3515}
3516
3517# collect_information($lineiterator, $line_continue, $regexp => $CODEref, ...)
3518# $lineiterator is a CODEref that delivers one line at a time.
3519# All following arguments are regex/CODEref pairs, where the regexp detects a
3520# line and the CODEref does something with the result of the regexp.
3521sub collect_information {
3522    my $lineiterator = shift;
3523    my %collectors = @_;
3524
3525    while(defined($_ = $lineiterator->())) {
3526        s|\R$||;
3527        my $found = 0;
3528        if ($collectors{"BEFORE"}) {
3529            $collectors{"BEFORE"}->($_);
3530        }
3531        foreach my $re (keys %collectors) {
3532            if ($re !~ /^OTHERWISE|BEFORE|AFTER$/ && /$re/) {
3533                $collectors{$re}->($lineiterator);
3534                $found = 1;
3535            };
3536        }
3537        if ($collectors{"OTHERWISE"}) {
3538            $collectors{"OTHERWISE"}->($lineiterator, $_)
3539                unless $found || !defined $collectors{"OTHERWISE"};
3540        }
3541        if ($collectors{"AFTER"}) {
3542            $collectors{"AFTER"}->($_);
3543        }
3544    }
3545}
3546
3547# tokenize($line)
3548# tokenize($line,$separator)
3549# $line is a line of text to split up into tokens
3550# $separator [optional] is a regular expression that separates the tokens,
3551# the default being spaces.  Do not use quotes of any kind as separators,
3552# that will give undefined results.
3553# Returns a list of tokens.
3554#
3555# Tokens are divided by separator (spaces by default).  If the tokens include
3556# the separators, they have to be quoted with single or double quotes.
3557# Double quotes inside a double quoted token must be escaped.  Escaping is done
3558# with backslash.
3559# Basically, the same quoting rules apply for " and ' as in any
3560# Unix shell.
3561sub tokenize {
3562    my $line = my $debug_line = shift;
3563    my $separator = shift // qr|\s+|;
3564    my @result = ();
3565
3566    if ($ENV{CONFIGURE_DEBUG_TOKENIZE}) {
3567        print STDERR "DEBUG[tokenize]: \$separator = $separator\n";
3568    }
3569
3570    while ($line =~ s|^${separator}||, $line ne "") {
3571        my $token = "";
3572    again:
3573        $line =~ m/^(.*?)(${separator}|"|'|$)/;
3574        $token .= $1;
3575        $line = $2.$';
3576
3577        if ($line =~ m/^"((?:[^"\\]+|\\.)*)"/) {
3578            $token .= $1;
3579            $line = $';
3580            goto again;
3581        } elsif ($line =~ m/^'([^']*)'/) {
3582            $token .= $1;
3583            $line = $';
3584            goto again;
3585        }
3586        push @result, $token;
3587    }
3588
3589    if ($ENV{CONFIGURE_DEBUG_TOKENIZE}) {
3590        print STDERR "DEBUG[tokenize]: Parsed '$debug_line' into:\n";
3591        print STDERR "DEBUG[tokenize]: ('", join("', '", @result), "')\n";
3592    }
3593    return @result;
3594}
3595