xref: /freebsd/contrib/expat/configure.ac (revision 2eb4d8dc723da3cf7d735a3226ae49da4c8c5dbc)
1dnl   configuration script for expat
2dnl   Process this file with autoconf to produce a configure script.
3dnl
4dnl   Copyright 2000 Clark Cooper
5dnl
6dnl   This file is part of EXPAT.
7dnl
8dnl   EXPAT is free software; you can redistribute it and/or modify it
9dnl   under the terms of the License (based on the MIT/X license) contained
10dnl   in the file COPYING that comes with this distribution.
11dnl
12
13dnl Ensure that Expat is configured with autoconf 2.69 or newer.
14AC_PREREQ(2.69)
15
16dnl Get the version number of Expat, using m4's esyscmd() command to run
17dnl the command at m4-generation time. This allows us to create an m4
18dnl symbol holding the correct version number. AC_INIT() requires the
19dnl version number at m4-time, rather than when ./configure is run, so
20dnl all this must happen as part of m4, not as part of the shell code
21dnl contained in ./configure.
22dnl
23dnl NOTE: esyscmd() is a GNU M4 extension. Thus, we wrap it in an appropriate
24dnl test. I believe this test will work, but I don't have a place with non-
25dnl GNU M4 to test it right now.
26m4_define([expat_version],
27  m4_ifdef([__gnu__],
28           [esyscmd(conftools/get-version.sh lib/expat.h)],
29           [2.2.x]))
30AC_INIT(expat, expat_version, expat-bugs@libexpat.org)
31m4_undefine([expat_version])
32
33AC_CONFIG_SRCDIR([Makefile.in])
34AC_CONFIG_AUX_DIR([conftools])
35AC_CONFIG_MACRO_DIR([m4])
36AC_CANONICAL_HOST
37AM_INIT_AUTOMAKE
38
39
40dnl
41dnl Increment LIBREVISION if source code has changed at all
42dnl
43dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0
44dnl
45dnl If the API changes compatibly (i.e. simply adding a new function
46dnl without changing or removing earlier interfaces), then increment LIBAGE.
47dnl
48dnl If the API changes incompatibly set LIBAGE back to 0
49dnl
50
51LIBCURRENT=7    # sync
52LIBREVISION=11  # with
53LIBAGE=6        # CMakeLists.txt!
54
55AX_APPEND_FLAG([-DHAVE_EXPAT_CONFIG_H], [CPPFLAGS])
56AC_CONFIG_HEADER([expat_config.h])
57
58AM_PROG_AR
59AC_PROG_INSTALL
60AC_PROG_LN_S
61AC_PROG_MAKE_SET
62
63LT_PREREQ([2.4])
64LT_INIT([win32-dll])
65
66AC_SUBST(LIBCURRENT)
67AC_SUBST(LIBREVISION)
68AC_SUBST(LIBAGE)
69
70AC_LANG([C])
71AC_PROG_CC_C99
72AS_IF([test "$GCC" = yes],
73  [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CFLAGS])
74   dnl Be careful about adding the -fexceptions option; some versions of
75   dnl GCC don't support it and it causes extra warnings that are only
76   dnl distracting; avoid.
77   AX_APPEND_COMPILE_FLAGS([-fexceptions], [CFLAGS])
78   AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [CFLAGS])
79   AX_APPEND_COMPILE_FLAGS([-pedantic -Wduplicated-cond -Wduplicated-branches -Wlogical-op], [CFLAGS])
80   AX_APPEND_COMPILE_FLAGS([-Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-promotion], [CFLAGS])
81   AX_APPEND_COMPILE_FLAGS([-Wshadow -Wformat=2 -Wmisleading-indentation], [CFLAGS])])
82
83AC_LANG_PUSH([C++])
84AC_PROG_CXX
85AS_IF([test "$GCC" = yes],
86  [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [CXXFLAGS])
87   dnl Be careful about adding the -fexceptions option; some versions of
88   dnl GCC don't support it and it causes extra warnings that are only
89   dnl distracting; avoid.
90   AX_APPEND_COMPILE_FLAGS([-fexceptions], [CXXFLAGS])
91   AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [CXXFLAGS])])
92AC_LANG_POP([C++])
93
94AS_IF([test "$GCC" = yes],
95  [AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[LDFLAGS])])
96
97dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang (issue #312)
98AS_CASE(["$LD"],[*clang*],
99  [AS_CASE(["${host_os}"],
100     [*linux*],[archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'])])
101
102EXPATCFG_COMPILER_SUPPORTS_VISIBILITY([
103  AX_APPEND_FLAG([-fvisibility=hidden],       [CFLAGS])
104  AX_APPEND_FLAG([-DXML_ENABLE_VISIBILITY=1], [CFLAGS])])
105
106dnl Checks for header files.
107AC_HEADER_STDC
108
109dnl Checks for typedefs, structures, and compiler characteristics.
110
111dnl We define BYTEORDER to 1234 when the platform is little endian; it
112dnl defines it to 4321 when the  platform is big endian.  We also define
113dnl WORDS_BIGENDIAN to 1 when the platform is big endian.
114dnl
115dnl A  long time  ago (early 2000  years) AC_C_BIGENDIAN  was considered
116dnl wrong when cross compiling, now (2018, GNU Autoconf 2.69) we assume
117dnl it is fine.
118AC_C_BIGENDIAN([AC_DEFINE([WORDS_BIGENDIAN], 1)
119                AS_VAR_SET([BYTEORDER], 4321)],
120               [AS_VAR_SET([BYTEORDER], 1234)])
121AC_DEFINE_UNQUOTED([BYTEORDER], $BYTEORDER, [1234 = LILENDIAN, 4321 = BIGENDIAN])
122
123AC_C_CONST
124AC_TYPE_SIZE_T
125
126AC_ARG_WITH([xmlwf],
127  [AS_HELP_STRING([--without-xmlwf], [do not build xmlwf])],
128  [],
129  [with_xmlwf=yes])
130AM_CONDITIONAL([WITH_XMLWF], [test x${with_xmlwf} = xyes])
131
132AC_ARG_WITH([examples],
133  [AS_HELP_STRING([--without-examples], [do not build examples @<:@default=included@:>@])],
134  [],
135  [with_examples=yes])
136AM_CONDITIONAL([WITH_EXAMPLES], [test x${with_examples} = xyes])
137
138AC_ARG_WITH([tests],
139  [AS_HELP_STRING([--without-tests], [do not build tests @<:@default=included@:>@])],
140  [],
141  [with_tests=yes])
142AM_CONDITIONAL([WITH_TESTS], [test x${with_tests} = xyes])
143
144
145AS_VAR_SET([EXPATCFG_ON_MINGW],[no])
146AS_CASE("${host_os}",
147  [mingw*],
148  [AS_VAR_SET([EXPATCFG_ON_MINGW],[yes])
149   AC_MSG_NOTICE([detected OS: MinGW])])
150AM_CONDITIONAL([MINGW], [test x${EXPATCFG_ON_MINGW} = xyes])
151
152AM_CONDITIONAL([UNICODE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE >/dev/null])
153
154
155AC_ARG_WITH([libbsd],
156  [AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])],
157  [],
158  [with_libbsd=no])
159AS_IF([test "x${with_libbsd}" != xno],
160  [AC_CHECK_LIB([bsd],
161     [arc4random_buf],
162     [],
163     [AS_IF([test "x${with_libbsd}" = xyes],
164        [AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])])
165AC_MSG_CHECKING([for arc4random_buf (BSD or libbsd)])
166AC_LINK_IFELSE([AC_LANG_SOURCE([
167    #include <stdlib.h>  /* for arc4random_buf on BSD, for NULL */
168    #if defined(HAVE_LIBBSD)
169    # include <bsd/stdlib.h>
170    #endif
171    int main() {
172      arc4random_buf(NULL, 0U);
173      return 0;
174    }
175  ])],
176  [AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.])
177   AC_MSG_RESULT([yes])],
178  [AC_MSG_RESULT([no])
179
180   AC_MSG_CHECKING([for arc4random (BSD, macOS or libbsd)])
181   AC_LINK_IFELSE([AC_LANG_SOURCE([
182       #if defined(HAVE_LIBBSD)
183       # include <bsd/stdlib.h>
184       #else
185       # include <stdlib.h>
186       #endif
187       int main() {
188          arc4random();
189          return 0;
190       }
191     ])],
192     [AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.])
193      AC_MSG_RESULT([yes])],
194     [AC_MSG_RESULT([no])])])
195
196AC_ARG_WITH([getrandom],
197  [AS_HELP_STRING([--with-getrandom],
198                  [enforce the use of getrandom function in the system @<:@default=check@:>@])
199AS_HELP_STRING([--without-getrandom],
200               [skip auto detect of getrandom @<:@default=check@:>@])],
201  [],
202  [with_getrandom=check])
203
204AS_IF([test "x$with_getrandom" != xno],
205  [AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
206   AC_LINK_IFELSE([AC_LANG_SOURCE([
207       #include <stdlib.h>  /* for NULL */
208       #include <sys/random.h>
209       int main() {
210         return getrandom(NULL, 0U, 0U);
211       }
212     ])],
213     [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.])
214      AC_MSG_RESULT([yes])],
215     [AC_MSG_RESULT([no])
216      AS_IF([test "x$with_getrandom" = xyes],
217        [AC_MSG_ERROR([enforced the use of getrandom --with-getrandom, but not detected])])])])
218
219AC_ARG_WITH([sys_getrandom],
220  [AS_HELP_STRING([--with-sys-getrandom],
221                  [enforce the use of syscall SYS_getrandom function in the system @<:@default=check@:>@])
222AS_HELP_STRING([--without-sys-getrandom],
223               [skip auto detect of syscall SYS_getrandom @<:@default=check@:>@])],
224  [],
225  [with_sys_getrandom=check])
226
227AS_IF([test "x$with_sys_getrandom" != xno],
228  [AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)])
229   AC_LINK_IFELSE([AC_LANG_SOURCE([
230       #include <stdlib.h>  /* for NULL */
231       #include <unistd.h>  /* for syscall */
232       #include <sys/syscall.h>  /* for SYS_getrandom */
233       int main() {
234         syscall(SYS_getrandom, NULL, 0, 0);
235         return 0;
236     }
237   ])],
238     [AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.])
239      AC_MSG_RESULT([yes])],
240     [AC_MSG_RESULT([no])
241      AS_IF([test "x$with_sys_getrandom" = xyes],
242        [AC_MSG_ERROR([enforced the use of syscall SYS_getrandom --with-sys-getrandom, but not detected])])])])
243
244dnl Only needed for xmlwf:
245AC_CHECK_HEADERS(fcntl.h unistd.h)
246AC_TYPE_OFF_T
247AC_FUNC_MMAP
248
249AS_IF([test "$ac_cv_func_mmap_fixed_mapped" = "yes"],
250  [AS_VAR_SET(FILEMAP,unixfilemap)],
251  [AS_VAR_SET(FILEMAP,readfilemap)])
252AC_SUBST(FILEMAP)
253
254
255dnl Some basic configuration:
256AC_DEFINE([XML_NS], 1,
257          [Define to make XML Namespaces functionality available.])
258AC_DEFINE([XML_DTD], 1,
259          [Define to make parameter entity parsing functionality available.])
260AC_DEFINE([XML_DEV_URANDOM], 1,
261          [Define to include code reading entropy from `/dev/urandom'.])
262
263AC_ARG_ENABLE([xml-attr-info],
264  [AS_HELP_STRING([--enable-xml-attr-info],
265     [Enable retrieving the byte offsets for attribute names and values @<:@default=no@:>@])],
266  [],
267  [enable_xml_attr_info=no])
268AS_IF([test "x${enable_xml_attr_info}" = "xyes"],
269      [AC_DEFINE([XML_ATTR_INFO], 1,
270         [Define to allow retrieving the byte offsets for attribute names and values.])])
271
272AC_ARG_ENABLE([xml-context],
273  AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@],
274    [Retain context around the current parse point;
275     default is enabled and a size of 1024 bytes])
276AS_HELP_STRING([--disable-xml-context],
277    [Do not retain context around the current parse point]),
278    [enable_xml_context=${enableval}])
279AS_IF([test "x${enable_xml_context}" != "xno"],
280  [AS_IF([test "x${enable_xml_context}" = "xyes" \
281            -o "x${enable_xml_context}" = "x"],
282     [AS_VAR_SET(enable_xml_context,1024)])
283   AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}],
284     [Define to specify how much context to retain around the current parse point.])])
285
286AC_ARG_WITH([docbook],
287  [AS_HELP_STRING([--with-docbook],
288                  [enforce XML to man page compilation @<:@default=check@:>@])
289AS_HELP_STRING([--without-docbook],
290               [skip XML to man page compilation @<:@default=check@:>@])],
291  [],
292  [with_docbook=check])
293
294AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command])
295AS_IF([test "x$with_docbook" != xno],
296  [AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man db2x_docbook2man docbook2man docbook-to-man])])
297AS_IF([test "x${DOCBOOK_TO_MAN}" = x -a "x$with_docbook" = xyes],
298  [AC_MSG_ERROR([Required program 'docbook2x-man' not found.])])
299AS_IF([test "x${DOCBOOK_TO_MAN}" != x -a "x$with_docbook" != xno],
300  [AS_IF([${DOCBOOK_TO_MAN} --help | grep -i -q -F sgmlbase],
301    [AC_MSG_ERROR([Your local ${DOCBOOK_TO_MAN} was found to work with SGML rather
302  than XML. Please install docbook2X and use variable DOCBOOK_TO_MAN to point
303  configure to command docbook2x-man of docbook2X.
304  Or use DOCBOOK_TO_MAN="xmlto man --skip-validation" if you have xmlto around.
305  You can also configure using --without-docbook if you can do without a man
306  page for xmlwf.])])])
307
308AM_CONDITIONAL(WITH_DOCBOOK, [test "x${DOCBOOK_TO_MAN}" != x])
309
310AC_CONFIG_FILES([Makefile]
311  [expat.pc]
312  [doc/Makefile]
313  [examples/Makefile]
314  [lib/Makefile]
315  [tests/Makefile]
316  [tests/benchmark/Makefile]
317  [xmlwf/Makefile])
318AC_CONFIG_FILES([run.sh], [chmod +x run.sh])
319AC_OUTPUT
320