1# acx_nlnetlabs.m4 - common macros for configure checks 2# Copyright 2009, Wouter Wijngaards, NLnet Labs. 3# BSD licensed. 4# 5# Version 41 6# 2021-07-30 fix for openssl use of lib64 directory. 7# 2021-06-14 fix nonblocking test to use host instead of target for mingw test. 8# 2021-05-17 fix nonblocking socket test from grep on mingw32 to mingw for 9# 64bit compatibility. 10# 2021-03-24 fix ACX_FUNC_DEPRECATED to use CPPFLAGS and CFLAGS. 11# 2021-01-05 fix defun for aclocal 12# 2021-01-05 autoconf 2.70 autoupdate and fixes, no AC_TRY_COMPILE 13# 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0). 14# 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0. 15# 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0). 16# 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20 17# 2015-12-11 FLTO check for new OSX, clang. 18# 2015-11-18 spelling check fix. 19# 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly. 20# 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added. 21# 2015-03-17 AHX_CONFIG_REALLOCARRAY added 22# 2013-09-19 FLTO help text improved. 23# 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes 24# 2013-06-25 FLTO has --disable-flto option. 25# 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it. 26# 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers. 27# 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h. 28# 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns. 29# 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc. 30# Fix ACX_MALLOC for redefined malloc error. 31# Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32 32# 2011-11-10 Fix FLTO test to not drop a.out in current directory. 33# 2011-11-01 Fix FLTO test for llvm on Lion. 34# 2011-08-01 Fix nonblock test (broken at v13). 35# 2011-08-01 Fix autoconf 2.68 warnings 36# 2011-06-23 Add ACX_CHECK_FLTO to check -flto. 37# 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66. 38# 2010-07-02 Add check for ss_family (for minix). 39# 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS. 40# 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end. 41# 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl 42# 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN 43# 2010-01-20 added AHX_COONFIG_STRLCAT 44# 2009-07-14 U_CHAR detection improved for windows crosscompile. 45# added ACX_FUNC_MALLOC 46# fixup some #if to #ifdef 47# NONBLOCKING test for mingw crosscompile. 48# 2009-07-13 added ACX_WITH_SSL_OPTIONAL 49# 2009-07-03 fixup LDFLAGS for empty ssl dir. 50# 51# Automates some of the checking constructs. Aims at portability for POSIX. 52# Documentation for functions is below. 53# 54# the following macro's are provided in this file: 55# (see below for details on each macro). 56# 57# ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc. 58# ACX_RSRC_VERSION - create windows resource version number. 59# ACX_CHECK_COMPILER_FLAG - see if cc supports a flag. 60# ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below). 61# ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly. 62# ACX_DEPFLAG - find cc dependency flags. 63# ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX. 64# ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax. 65# ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax. 66# ACX_CHECK_FLTO - see if cc supports -flto and use it if so. 67# ACX_LIBTOOL_C_ONLY - create libtool for C only, improved. 68# ACX_TYPE_U_CHAR - u_char type. 69# ACX_TYPE_RLIM_T - rlim_t type. 70# ACX_TYPE_SOCKLEN_T - socklen_t type. 71# ACX_TYPE_IN_ADDR_T - in_addr_t type. 72# ACX_TYPE_IN_PORT_T - in_port_t type. 73# ACX_ARG_RPATH - add --disable-rpath option. 74# ACX_WITH_SSL - add --with-ssl option, link -lcrypto. 75# ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto, 76# where --without-ssl is also accepted 77# ACX_LIB_SSL - setup to link -lssl. 78# ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files. 79# ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably. 80# ACX_FUNC_DEPRECATED - see if func is deprecated. 81# ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work. 82# ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments. 83# ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably. 84# ACX_FUNC_MALLOC - check malloc, define replacement . 85# AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format. 86# AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused. 87# AHX_CONFIG_FSEEKO - define fseeko, ftello fallback. 88# AHX_CONFIG_RAND_MAX - define RAND_MAX if needed. 89# AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed. 90# AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed. 91# AHX_CONFIG_SNPRINTF - snprintf compat prototype 92# AHX_CONFIG_INET_PTON - inet_pton compat prototype 93# AHX_CONFIG_INET_NTOP - inet_ntop compat prototype 94# AHX_CONFIG_INET_ATON - inet_aton compat prototype 95# AHX_CONFIG_MEMMOVE - memmove compat prototype 96# AHX_CONFIG_STRLCAT - strlcat compat prototype 97# AHX_CONFIG_STRLCPY - strlcpy compat prototype 98# AHX_CONFIG_GMTIME_R - gmtime_r compat prototype 99# AHX_CONFIG_W32_SLEEP - w32 compat for sleep 100# AHX_CONFIG_W32_USLEEP - w32 compat for usleep 101# AHX_CONFIG_W32_RANDOM - w32 compat for random 102# AHX_CONFIG_W32_SRANDOM - w32 compat for srandom 103# AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T. 104# ACX_CFLAGS_STRIP - strip one flag from CFLAGS 105# ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS 106# AHX_CONFIG_FLAG_OMITTED - define omitted flag 107# AHX_CONFIG_FLAG_EXT - define omitted extension flag 108# AHX_CONFIG_EXT_FLAGS - define the stripped extension flags 109# ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters. 110# AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED. 111# ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family 112# ACX_CHECK_PIE - add --enable-pie option and check if works 113# ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it 114# 115 116dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines. 117dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var) 118dnl $1: the text to change. 119dnl $2: the result. 120AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`" 121]) 122 123dnl Calculate comma separated windows-resource numbers from package version. 124dnl Picks the first three(,0) or four numbers out of the name. 125dnl $1: variable for the result 126AC_DEFUN([ACX_RSRC_VERSION], 127[$1=[`echo $PACKAGE_VERSION | sed -e 's/^[^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\).*$/\1,\2,\3,\4/' -e 's/^[^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9]*$/\1,\2,\3,0/' `] 128]) 129 130dnl Routine to help check for compiler flags. 131dnl Checks if the compiler will accept the flag. 132dnl $1: the flag without a - in front, so g to check -g. 133dnl $2: executed if yes 134dnl $3: executed if no 135AC_DEFUN([ACX_CHECK_COMPILER_FLAG], 136[ 137AC_REQUIRE([AC_PROG_CC]) 138AC_MSG_CHECKING(whether $CC supports -$1) 139cache=`echo $1 | sed 'y%.=/+-%___p_%'` 140AC_CACHE_VAL(cv_prog_cc_flag_$cache, 141[ 142echo 'void f(void){}' >conftest.c 143if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then 144eval "cv_prog_cc_flag_$cache=yes" 145else 146eval "cv_prog_cc_flag_$cache=no" 147fi 148rm -f conftest conftest.o conftest.c 149]) 150if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then 151AC_MSG_RESULT(yes) 152: 153$2 154else 155AC_MSG_RESULT(no) 156: 157$3 158fi 159]) 160 161dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED 162dnl ERRFLAG: result, compiler flag to turn warnings into errors 163AC_DEFUN([ACX_CHECK_ERROR_FLAGS], 164[ 165ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"]) 166ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"], 167 [ERRFLAG="$ERRFLAG -errfmt"]) 168]) 169 170dnl Routine to help check for needed compiler flags. 171dnl $1: flags for CC 172dnl $2: the includes and code 173dnl $3: if the given code only compiles with the flag, execute argument 3 174dnl $4: if the given code compiles without the flag, execute argument 4 175dnl $5: with and without flag the compile fails, execute argument 5. 176AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED], 177[ 178AC_REQUIRE([AC_PROG_CC]) 179AC_REQUIRE([ACX_CHECK_ERROR_FLAGS]) 180AC_MSG_CHECKING(whether we need $1 as a flag for $CC) 181cache=AS_TR_SH($1) 182dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'` 183AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache, 184[ 185echo '$2' > conftest.c 186echo 'void f(){}' >>conftest.c 187if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then 188eval "cv_prog_cc_flag_needed_$cache=no" 189else 190[ 191if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then 192eval "cv_prog_cc_flag_needed_$cache=yes" 193else 194eval "cv_prog_cc_flag_needed_$cache=fail" 195#echo 'Test with flag fails too!' 196#cat conftest.c 197#echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1" 198#echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1` 199#exit 1 200fi 201] 202fi 203rm -f conftest conftest.c conftest.o 204]) 205if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then 206AC_MSG_RESULT(yes) 207: 208$3 209else 210if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then 211AC_MSG_RESULT(no) 212#echo 'Test with flag is no!' 213#cat conftest.c 214#echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1" 215#echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1` 216#exit 1 217: 218$4 219else 220AC_MSG_RESULT(failed) 221: 222$5 223fi 224fi 225]) 226 227dnl Check for CC dependency flag 228dnl DEPFLAG: set to flag that generates dependencies. 229AC_DEFUN([ACX_DEPFLAG], 230[ 231AC_MSG_CHECKING([$CC dependency flag]) 232echo 'void f(){}' >conftest.c 233if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then 234 DEPFLAG="-MM" 235else 236 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then 237 DEPFLAG="-xM1" 238 else 239 DEPFLAG="-MM" # dunno do something 240 fi 241fi 242AC_MSG_RESULT($DEPFLAG) 243rm -f conftest.c 244AC_SUBST(DEPFLAG) 245]) 246 247dnl Determine flags that gives POSIX and BSD functionality. 248dnl CFLAGS is modified for the result. 249AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND], 250[ 251ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"]) 252ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"]) 253 254AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT]) 255 256ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE, 257[ 258#include "confdefs.h" 259#include <stdlib.h> 260#include <ctype.h> 261#include <sys/time.h> 262#ifdef HAVE_TIME_H 263#include <time.h> 264#endif 265#include <unistd.h> 266#include <netdb.h> 267#ifdef HAVE_GETOPT_H 268#include <getopt.h> 269#endif 270 271int test() { 272 int a; 273 char **opts = NULL; 274 struct timeval tv; 275 char *t; 276 time_t time = 0; 277 char *buf = NULL; 278 const char* str = NULL; 279 struct msghdr msg; 280 msg.msg_control = 0; 281 t = ctime_r(&time, buf); 282 tv.tv_usec = 10; 283 srandom(32); 284 a = getopt(2, opts, "a"); 285 a = isascii(32); 286 str = gai_strerror(0); 287 if(str && t && tv.tv_usec && msg.msg_control) 288 a = 0; 289 return a; 290} 291], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"]) 292 293ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE, 294[ 295#include "confdefs.h" 296#include <stdlib.h> 297#include <ctype.h> 298#include <sys/time.h> 299#ifdef HAVE_TIME_H 300#include <time.h> 301#endif 302#include <unistd.h> 303#include <netdb.h> 304#ifdef HAVE_GETOPT_H 305#include <getopt.h> 306#endif 307 308int test() { 309 int a; 310 char **opts = NULL; 311 struct timeval tv; 312 char *t; 313 time_t time = 0; 314 char *buf = NULL; 315 const char* str = NULL; 316 struct msghdr msg; 317 msg.msg_control = 0; 318 t = ctime_r(&time, buf); 319 tv.tv_usec = 10; 320 srandom(32); 321 a = getopt(2, opts, "a"); 322 a = isascii(32); 323 str = gai_strerror(0); 324 if(str && t && tv.tv_usec && msg.msg_control) 325 a = 0; 326 return a; 327} 328], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"]) 329 330ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG, 331[ 332#include <stdbool.h> 333#include <ctype.h> 334int test() { 335 int a = 0; 336 return a; 337} 338], [CFLAGS="$CFLAGS $C99FLAG"]) 339 340ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE, 341[ 342#include <ctype.h> 343 344int test() { 345 int a; 346 a = isascii(32); 347 return a; 348} 349], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"]) 350 351ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE, 352[ 353#include <netinet/in.h> 354 355int test() { 356 struct in6_pktinfo inf; 357 int a = (int)sizeof(inf); 358 return a; 359} 360], [CFLAGS="$CFLAGS -D_GNU_SOURCE"]) 361 362# check again for GNU_SOURCE for setresgid. May fail if setresgid 363# is not available at all. -D_FRSRESGID is to make this check unique. 364# otherwise we would get the previous cached result. 365ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID, 366[ 367#include <unistd.h> 368 369int test() { 370 int a = setresgid(0,0,0); 371 a = setresuid(0,0,0); 372 return a; 373} 374], [CFLAGS="$CFLAGS -D_GNU_SOURCE"]) 375 376ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112, 377[ 378#include "confdefs.h" 379#ifdef HAVE_TIME_H 380#include <time.h> 381#endif 382#include <netdb.h> 383 384int test() { 385 int a = 0; 386 char *t; 387 time_t time = 0; 388 char *buf = NULL; 389 const char* str = NULL; 390 t = ctime_r(&time, buf); 391 str = gai_strerror(0); 392 if(t && str) 393 a = 0; 394 return a; 395} 396], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"]) 397 398ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__, 399[ 400#include "confdefs.h" 401#include <stdlib.h> 402#include <ctype.h> 403#include <sys/time.h> 404#ifdef HAVE_TIME_H 405#include <time.h> 406#endif 407#include <unistd.h> 408#ifdef HAVE_GETOPT_H 409#include <getopt.h> 410#endif 411 412int test() { 413 int a; 414 char **opts = NULL; 415 struct timeval tv; 416 tv.tv_usec = 10; 417 srandom(32); 418 a = getopt(2, opts, "a"); 419 a = isascii(32); 420 if(tv.tv_usec) 421 a = 0; 422 return a; 423} 424], [CFLAGS="$CFLAGS -D__EXTENSIONS__"]) 425 426])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND 427 428dnl Check if CC supports -flto. 429dnl in a way that supports clang and suncc (that flag does something else, 430dnl but fails to link). It sets it in CFLAGS if it works. 431AC_DEFUN([ACX_CHECK_FLTO], [ 432 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)])) 433 AS_IF([test "x$enable_flto" != "xno"], [ 434 AC_MSG_CHECKING([if $CC supports -flto]) 435 BAKCFLAGS="$CFLAGS" 436 CFLAGS="$CFLAGS -flto" 437 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 438 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then 439 CFLAGS="$BAKCFLAGS" 440 AC_MSG_RESULT(no) 441 else 442 AC_MSG_RESULT(yes) 443 fi 444 rm -f conftest conftest.c conftest.o 445 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)]) 446 ]) 447]) 448 449dnl Check the printf-format attribute (if any) 450dnl result in HAVE_ATTR_FORMAT. 451dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE. 452AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE], 453[AC_REQUIRE([AC_PROG_CC]) 454AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute) 455AC_CACHE_VAL(ac_cv_c_format_attribute, 456[ac_cv_c_format_attribute=no 457AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> 458void f (char *format, ...) __attribute__ ((format (printf, 1, 2))); 459void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2))); 460]], [[ 461 f ("%s", "str"); 462]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"]) 463]) 464 465AC_MSG_RESULT($ac_cv_c_format_attribute) 466if test $ac_cv_c_format_attribute = yes; then 467 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute]) 468fi 469])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE 470 471dnl Setup ATTR_FORMAT config.h parts. 472dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also. 473AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE], 474[ 475#ifdef HAVE_ATTR_FORMAT 476# define ATTR_FORMAT(archetype, string_index, first_to_check) \ 477 __attribute__ ((format (archetype, string_index, first_to_check))) 478#else /* !HAVE_ATTR_FORMAT */ 479# define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */ 480#endif /* !HAVE_ATTR_FORMAT */ 481]) 482 483dnl Check how to mark function arguments as unused. 484dnl result in HAVE_ATTR_UNUSED. 485dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also. 486AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE], 487[AC_REQUIRE([AC_PROG_CC]) 488AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute) 489AC_CACHE_VAL(ac_cv_c_unused_attribute, 490[ac_cv_c_unused_attribute=no 491AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> 492void f (char *u __attribute__((unused))); 493]], [[ 494 f ("x"); 495]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"]) 496]) 497 498dnl Setup ATTR_UNUSED config.h parts. 499dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also. 500AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE], 501[ 502#if defined(DOXYGEN) 503# define ATTR_UNUSED(x) x 504#elif defined(__cplusplus) 505# define ATTR_UNUSED(x) 506#elif defined(HAVE_ATTR_UNUSED) 507# define ATTR_UNUSED(x) x __attribute__((unused)) 508#else /* !HAVE_ATTR_UNUSED */ 509# define ATTR_UNUSED(x) x 510#endif /* !HAVE_ATTR_UNUSED */ 511]) 512 513AC_MSG_RESULT($ac_cv_c_unused_attribute) 514if test $ac_cv_c_unused_attribute = yes; then 515 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute]) 516fi 517])dnl 518 519dnl Pre-fun for ACX_LIBTOOL_C_ONLY 520AC_DEFUN([ACX_LIBTOOL_C_PRE], [ 521# skip these tests, we do not need them. 522AC_DEFUN([AC_PROG_F77], [:]) 523AC_DEFUN([AC_PROG_FC], [:]) 524AC_DEFUN([AC_PROG_CXX], [:]) 525AC_DEFUN([AC_PROG_CXXCPP], [:]) 526AC_DEFUN([AC_PROG_OBJC], [:]) 527AC_DEFUN([AC_PROG_OBJCCPP], [:]) 528AC_DEFUN([AC_LIBTOOL_CXX], [:]) 529AC_DEFUN([AC_LIBTOOL_F77], [:]) 530# always use ./libtool unless override from commandline (libtool=mylibtool) 531if test -z "$libtool"; then 532 libtool="./libtool" 533fi 534AC_SUBST(libtool) 535# avoid libtool max commandline length test on systems that fork slowly. 536AC_CANONICAL_HOST 537if echo "$host_os" | grep "sunos4" >/dev/null; then 538 lt_cv_sys_max_cmd_len=32750; 539fi 540AC_PATH_TOOL(AR, ar, [false]) 541if test $AR = false; then 542 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it]) 543fi 544]) 545 546dnl Perform libtool check, portably, only for C 547AC_DEFUN([ACX_LIBTOOL_C_ONLY], [ 548dnl as a requirement so that is gets called before LIBTOOL 549dnl because libtools 'AC_REQUIRE' names are right after this one, before 550dnl this function contents. 551AC_REQUIRE([ACX_LIBTOOL_C_PRE]) 552LT_INIT 553]) 554 555dnl Detect if u_char type is defined, otherwise define it. 556AC_DEFUN([ACX_TYPE_U_CHAR], 557[AC_CHECK_TYPE([u_char], , 558 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [ 559AC_INCLUDES_DEFAULT 560#ifdef HAVE_WINSOCK2_H 561# include <winsock2.h> 562#endif 563]) ]) 564 565dnl Detect if rlim_t type is defined, otherwise define it. 566AC_DEFUN([ACX_TYPE_RLIM_T], 567[AC_CHECK_TYPE(rlim_t, , 568 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [ 569AC_INCLUDES_DEFAULT 570#ifdef HAVE_SYS_RESOURCE_H 571# include <sys/resource.h> 572#endif 573]) ]) 574 575dnl Detect if socklen_t type is defined, otherwise define it. 576AC_DEFUN([ACX_TYPE_SOCKLEN_T], 577[ 578AC_CHECK_TYPE(socklen_t, , 579 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [ 580AC_INCLUDES_DEFAULT 581#ifdef HAVE_SYS_SOCKET_H 582# include <sys/socket.h> 583#endif 584#ifdef HAVE_WS2TCPIP_H 585# include <ws2tcpip.h> 586#endif 587]) ]) 588 589dnl Detect if in_addr_t type is defined, otherwise define it. 590AC_DEFUN([ACX_TYPE_IN_ADDR_T], 591[ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [ 592AC_INCLUDES_DEFAULT 593#ifdef HAVE_SYS_TYPES_H 594# include <sys/types.h> 595#endif 596#ifdef HAVE_NETINET_IN_H 597# include <netinet/in.h> 598#endif 599]) ]) 600 601dnl Detect if in_port_t type is defined, otherwise define it. 602AC_DEFUN([ACX_TYPE_IN_PORT_T], 603[ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [ 604AC_INCLUDES_DEFAULT 605#ifdef HAVE_SYS_TYPES_H 606# include <sys/types.h> 607#endif 608#ifdef HAVE_NETINET_IN_H 609# include <netinet/in.h> 610#endif 611]) ]) 612 613dnl Add option to disable the evil rpath. Check whether to use rpath or not. 614dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool. 615AC_DEFUN([ACX_ARG_RPATH], 616[ 617AC_ARG_ENABLE(rpath, 618 [ --disable-rpath disable hardcoded rpath (default=enabled)], 619 enable_rpath=$enableval, enable_rpath=yes) 620if test "x$enable_rpath" = xno; then 621 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.]) 622 AC_CONFIG_COMMANDS([disable-rpath], [ 623 sed < libtool > libtool-2 \ 624 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/' 625 mv libtool-2 libtool 626 chmod 755 libtool 627 libtool="./libtool" 628 ]) 629fi 630]) 631 632dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is 633dnl an absolute path. 634dnl $1: the pathname to add. 635AC_DEFUN([ACX_RUNTIME_PATH_ADD], [ 636 if test "x$enable_rpath" = xyes; then 637 if echo "$1" | grep "^/" >/dev/null; then 638 RUNTIME_PATH="$RUNTIME_PATH -R$1" 639 fi 640 fi 641]) 642 643dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL 644dnl Takes one argument; the withval checked in those 2 functions 645dnl sets up the environment for the given openssl path 646AC_DEFUN([ACX_SSL_CHECKS], [ 647 withval=$1 648 if test x_$withval != x_no; then 649 AC_MSG_CHECKING(for SSL) 650 if test x_$withval = x_ -o x_$withval = x_yes; then 651 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr" 652 fi 653 for dir in $withval; do 654 ssldir="$dir" 655 if test -f "$dir/include/openssl/ssl.h"; then 656 found_ssl="yes" 657 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.]) 658 dnl assume /usr/include is already in the include-path. 659 if test "$ssldir" != "/usr"; then 660 CPPFLAGS="$CPPFLAGS -I$ssldir/include" 661 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include" 662 fi 663 break; 664 fi 665 done 666 if test x_$found_ssl != x_yes; then 667 AC_MSG_ERROR(Cannot find the SSL libraries in $withval) 668 else 669 AC_MSG_RESULT(found in $ssldir) 670 HAVE_SSL=yes 671 dnl assume /usr is already in the lib and dynlib paths. 672 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then 673 if test ! -d "$ssldir/lib" -a -d "$ssldir/lib64"; then 674 LDFLAGS="$LDFLAGS -L$ssldir/lib64" 675 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib64" 676 ACX_RUNTIME_PATH_ADD([$ssldir/lib64]) 677 else 678 LDFLAGS="$LDFLAGS -L$ssldir/lib" 679 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib" 680 ACX_RUNTIME_PATH_ADD([$ssldir/lib]) 681 fi 682 fi 683 684 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto]) 685 LIBS="$LIBS -lcrypto" 686 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto" 687 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 688 int EVP_sha256(void); 689 (void)EVP_sha256(); 690 ]])],[ 691 AC_MSG_RESULT(yes) 692 AC_DEFINE([HAVE_EVP_SHA256], 1, 693 [If you have EVP_sha256]) 694 ],[ 695 AC_MSG_RESULT(no) 696 # check if -lwsock32 or -lgdi32 are needed. 697 BAKLIBS="$LIBS" 698 BAKSSLLIBS="$LIBSSL_LIBS" 699 LIBS="$LIBS -lgdi32 -lws2_32" 700 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32" 701 AC_MSG_CHECKING([if -lcrypto needs -lgdi32]) 702 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 703 int EVP_sha256(void); 704 (void)EVP_sha256(); 705 ]])],[ 706 AC_DEFINE([HAVE_EVP_SHA256], 1, 707 [If you have EVP_sha256]) 708 AC_MSG_RESULT(yes) 709 ],[ 710 AC_MSG_RESULT(no) 711 LIBS="$BAKLIBS" 712 LIBSSL_LIBS="$BAKSSLLIBS" 713 LIBS="$LIBS -ldl" 714 LIBSSL_LIBS="$LIBSSL_LIBS -ldl" 715 AC_MSG_CHECKING([if -lcrypto needs -ldl]) 716 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 717 int EVP_sha256(void); 718 (void)EVP_sha256(); 719 ]])],[ 720 AC_DEFINE([HAVE_EVP_SHA256], 1, 721 [If you have EVP_sha256]) 722 AC_MSG_RESULT(yes) 723 ],[ 724 AC_MSG_RESULT(no) 725 LIBS="$BAKLIBS" 726 LIBSSL_LIBS="$BAKSSLLIBS" 727 LIBS="$LIBS -ldl -pthread" 728 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread" 729 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread]) 730 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 731 int EVP_sha256(void); 732 (void)EVP_sha256(); 733 ]])],[ 734 AC_DEFINE([HAVE_EVP_SHA256], 1, 735 [If you have EVP_sha256]) 736 AC_MSG_RESULT(yes) 737 ],[ 738 AC_MSG_RESULT(no) 739 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required]) 740 ]) 741 ]) 742 ]) 743 ]) 744 fi 745 AC_SUBST(HAVE_SSL) 746 AC_SUBST(RUNTIME_PATH) 747 fi 748AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT]) 749AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT]) 750AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT]) 751])dnl End of ACX_SSL_CHECKS 752 753dnl Check for SSL, where SSL is mandatory 754dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found 755dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS. 756dnl Checks main header files of SSL. 757dnl 758AC_DEFUN([ACX_WITH_SSL], 759[ 760AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl 761 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[ 762 ],[ 763 withval="yes" 764 ]) 765 if test x_$withval = x_no; then 766 AC_MSG_ERROR([Need SSL library to do digital signature cryptography]) 767 fi 768 ACX_SSL_CHECKS($withval) 769])dnl End of ACX_WITH_SSL 770 771dnl Check for SSL, where ssl is optional (--without-ssl is allowed) 772dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found 773dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS. 774dnl Checks main header files of SSL. 775dnl 776AC_DEFUN([ACX_WITH_SSL_OPTIONAL], 777[ 778AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl 779 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[ 780 ],[ 781 withval="yes" 782 ]) 783 ACX_SSL_CHECKS($withval) 784])dnl End of ACX_WITH_SSL_OPTIONAL 785 786dnl Setup to use -lssl 787dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one). 788AC_DEFUN([ACX_LIB_SSL], 789[ 790# check if libssl needs libdl 791BAKLIBS="$LIBS" 792LIBS="-lssl $LIBS" 793AC_MSG_CHECKING([if libssl needs libdl]) 794AC_TRY_LINK_FUNC([SSL_CTX_new], [ 795 AC_MSG_RESULT([no]) 796 LIBS="$BAKLIBS" 797] , [ 798 AC_MSG_RESULT([yes]) 799 LIBS="$BAKLIBS" 800 AC_SEARCH_LIBS([dlopen], [dl]) 801]) ])dnl End of ACX_LIB_SSL 802 803dnl Setup to use very large files (>2Gb). 804dnl setups fseeko and its own 805AC_DEFUN([ACX_SYS_LARGEFILE], 806[ 807AC_SYS_LARGEFILE 808dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko 809ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1, 810[ 811#include <stdio.h> 812int test() { 813 int a = fseeko(stdin, 0, 0); 814 return a; 815} 816], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"]) 817]) 818 819dnl Check getaddrinfo. 820dnl Works on linux, solaris, bsd and windows(links winsock). 821dnl defines HAVE_GETADDRINFO, USE_WINSOCK. 822AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES], 823[AC_REQUIRE([AC_PROG_CC]) 824AC_MSG_CHECKING(for getaddrinfo) 825ac_cv_func_getaddrinfo=no 826AC_LINK_IFELSE( 827[AC_LANG_SOURCE([[ 828#ifdef __cplusplus 829extern "C" 830{ 831#endif 832char* getaddrinfo(); 833char* (*f) () = getaddrinfo; 834#ifdef __cplusplus 835} 836#endif 837int main() { 838 ; 839 return 0; 840} 841]])], 842dnl this case on linux, solaris, bsd 843[ac_cv_func_getaddrinfo="yes" 844dnl see if on windows 845if test "$ac_cv_header_windows_h" = "yes"; then 846 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used]) 847 USE_WINSOCK="1" 848 if echo $LIBS | grep 'lws2_32' >/dev/null; then 849 : 850 else 851 LIBS="$LIBS -lws2_32" 852 fi 853fi 854], 855dnl no quick getaddrinfo, try mingw32 and winsock2 library. 856ORIGLIBS="$LIBS" 857LIBS="$LIBS -lws2_32" 858AC_LINK_IFELSE( 859[AC_LANG_PROGRAM( 860[ 861#ifdef HAVE_WS2TCPIP_H 862#include <ws2tcpip.h> 863#endif 864], 865[ 866 (void)getaddrinfo(NULL, NULL, NULL, NULL); 867] 868)], 869[ 870ac_cv_func_getaddrinfo="yes" 871dnl already: LIBS="$LIBS -lws2_32" 872AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used]) 873USE_WINSOCK="1" 874], 875[ 876ac_cv_func_getaddrinfo="no" 877LIBS="$ORIGLIBS" 878]) 879) 880 881AC_MSG_RESULT($ac_cv_func_getaddrinfo) 882if test $ac_cv_func_getaddrinfo = yes; then 883 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available]) 884fi 885])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES 886 887dnl check if a function is deprecated. defines DEPRECATED_func in config.h. 888dnl $1: function name 889dnl $2: C-statement that calls the function. 890dnl $3: includes for the program. 891dnl $4: executes if yes 892dnl $5: executes if no 893AC_DEFUN([ACX_FUNC_DEPRECATED], 894[ 895AC_REQUIRE([AC_PROG_CC]) 896AC_MSG_CHECKING(if $1 is deprecated) 897cache=`echo $1 | sed 'y%.=/+-%___p_%'` 898AC_CACHE_VAL(cv_cc_deprecated_$cache, 899[ 900echo '$3' >conftest.c 901echo 'void f(){ $2 }' >>conftest.c 902if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then 903eval "cv_cc_deprecated_$cache=no" 904else 905eval "cv_cc_deprecated_$cache=yes" 906fi 907rm -f conftest conftest.o conftest.c 908]) 909if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then 910AC_MSG_RESULT(yes) 911AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated]) 912: 913$4 914else 915AC_MSG_RESULT(no) 916: 917$5 918fi 919])dnl end of ACX_FUNC_DEPRECATED 920 921dnl check if select and nonblocking sockets actually work. 922dnl Needs fork(2) and select(2). 923dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from 924dnl a nonblocking socket do not work, a new call to select is necessary. 925AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN], 926[ 927AC_MSG_CHECKING([if nonblocking sockets work]) 928if echo $host | grep mingw >/dev/null; then 929 AC_MSG_RESULT([no (windows)]) 930 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).]) 931else 932AC_RUN_IFELSE([ 933AC_LANG_SOURCE([[ 934#include <stdio.h> 935#include <string.h> 936#include <stdlib.h> 937#include <fcntl.h> 938#include <errno.h> 939#ifdef HAVE_SYS_TYPES_H 940#include <sys/types.h> 941#endif 942#ifdef HAVE_SYS_SOCKET_H 943#include <sys/socket.h> 944#endif 945#ifdef HAVE_NETINET_IN_H 946#include <netinet/in.h> 947#endif 948#ifdef HAVE_ARPA_INET_H 949#include <arpa/inet.h> 950#endif 951#ifdef HAVE_UNISTD_H 952#include <unistd.h> 953#endif 954#ifdef HAVE_TIME_H 955#include <time.h> 956#endif 957 958int main(void) 959{ 960 int port; 961 int sfd, cfd; 962 int num = 10; 963 int i, p; 964 struct sockaddr_in a; 965 /* test if select and nonblocking reads work well together */ 966 /* open port. 967 fork child to send 10 messages. 968 select to read. 969 then try to nonblocking read the 10 messages 970 then, nonblocking read must give EAGAIN 971 */ 972 973 port = 12345 + (time(0)%32); 974 sfd = socket(PF_INET, SOCK_DGRAM, 0); 975 if(sfd == -1) { 976 perror("socket"); 977 return 1; 978 } 979 memset(&a, 0, sizeof(a)); 980 a.sin_family = AF_INET; 981 a.sin_port = htons(port); 982 a.sin_addr.s_addr = inet_addr("127.0.0.1"); 983 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) { 984 perror("bind"); 985 return 1; 986 } 987 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) { 988 perror("fcntl"); 989 return 1; 990 } 991 992 cfd = socket(PF_INET, SOCK_DGRAM, 0); 993 if(cfd == -1) { 994 perror("client socket"); 995 return 1; 996 } 997 a.sin_port = 0; 998 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) { 999 perror("client bind"); 1000 return 1; 1001 } 1002 a.sin_port = htons(port); 1003 1004 /* no handler, causes exit in 10 seconds */ 1005 alarm(10); 1006 1007 /* send and receive on the socket */ 1008 if((p=fork()) == 0) { 1009 for(i=0; i<num; i++) { 1010 if(sendto(cfd, &i, sizeof(i), 0, 1011 (struct sockaddr*)&a, sizeof(a)) < 0) { 1012 perror("sendto"); 1013 return 1; 1014 } 1015 } 1016 } else { 1017 /* parent */ 1018 fd_set rset; 1019 int x; 1020 if(p == -1) { 1021 perror("fork"); 1022 return 1; 1023 } 1024 FD_ZERO(&rset); 1025 FD_SET(sfd, &rset); 1026 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) { 1027 perror("select"); 1028 return 1; 1029 } 1030 i = 0; 1031 while(i < num) { 1032 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) { 1033 if(errno == EAGAIN) 1034 continue; 1035 perror("recv"); 1036 return 1; 1037 } 1038 i++; 1039 } 1040 /* now we want to get EAGAIN: nonblocking goodness */ 1041 errno = 0; 1042 recv(sfd, &x, sizeof(x), 0); 1043 if(errno != EAGAIN) { 1044 perror("trying to recv again"); 1045 return 1; 1046 } 1047 /* EAGAIN encountered */ 1048 } 1049 1050 close(sfd); 1051 close(cfd); 1052 return 0; 1053} 1054]])], [ 1055 AC_MSG_RESULT([yes]) 1056], [ 1057 AC_MSG_RESULT([no]) 1058 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).]) 1059], [ 1060 AC_MSG_RESULT([crosscompile(yes)]) 1061]) 1062fi 1063])dnl End of ACX_CHECK_NONBLOCKING_BROKEN 1064 1065dnl Check if mkdir has one or two arguments. 1066dnl defines MKDIR_HAS_ONE_ARG 1067AC_DEFUN([ACX_MKDIR_ONE_ARG], 1068[ 1069AC_MSG_CHECKING([whether mkdir has one arg]) 1070AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 1071#include <stdio.h> 1072#include <unistd.h> 1073#ifdef HAVE_WINSOCK2_H 1074#include <winsock2.h> 1075#endif 1076#ifdef HAVE_SYS_STAT_H 1077#include <sys/stat.h> 1078#endif 1079]], [[ 1080 (void)mkdir("directory"); 1081]])],[AC_MSG_RESULT(yes) 1082AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.]) 1083],[AC_MSG_RESULT(no) 1084]) 1085])dnl end of ACX_MKDIR_ONE_ARG 1086 1087dnl Check for ioctlsocket function. works on mingw32 too. 1088AC_DEFUN([ACX_FUNC_IOCTLSOCKET], 1089[ 1090# check ioctlsocket 1091AC_MSG_CHECKING(for ioctlsocket) 1092AC_LINK_IFELSE([AC_LANG_PROGRAM([ 1093#ifdef HAVE_WINSOCK2_H 1094#include <winsock2.h> 1095#endif 1096], [ 1097 (void)ioctlsocket(0, 0, NULL); 1098])], [ 1099AC_MSG_RESULT(yes) 1100AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available]) 1101],[AC_MSG_RESULT(no)]) 1102])dnl end of ACX_FUNC_IOCTLSOCKET 1103 1104dnl detect malloc and provide malloc compat prototype. 1105dnl $1: unique name for compat code 1106AC_DEFUN([ACX_FUNC_MALLOC], 1107[ 1108 AC_MSG_CHECKING([for GNU libc compatible malloc]) 1109 AC_RUN_IFELSE([AC_LANG_PROGRAM( 1110[[#if defined STDC_HEADERS || defined HAVE_STDLIB_H 1111#include <stdlib.h> 1112#else 1113char *malloc (); 1114#endif 1115]], [ if(malloc(0) != 0) return 1;]) 1116], 1117 [AC_MSG_RESULT([no]) 1118 AC_LIBOBJ(malloc) 1119 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] , 1120 [AC_MSG_RESULT([yes]) 1121 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])], 1122 [AC_MSG_RESULT([no (crosscompile)]) 1123 AC_LIBOBJ(malloc) 1124 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ) 1125]) 1126 1127dnl Define fallback for fseeko and ftello if needed. 1128AC_DEFUN([AHX_CONFIG_FSEEKO], 1129[ 1130#ifndef HAVE_FSEEKO 1131#define fseeko fseek 1132#define ftello ftell 1133#endif /* HAVE_FSEEKO */ 1134]) 1135 1136dnl Define RAND_MAX if not defined 1137AC_DEFUN([AHX_CONFIG_RAND_MAX], 1138[ 1139#ifndef RAND_MAX 1140#define RAND_MAX 2147483647 1141#endif 1142]) 1143 1144dnl Define MAXHOSTNAMELEN if not defined 1145AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN], 1146[ 1147#ifndef MAXHOSTNAMELEN 1148#define MAXHOSTNAMELEN 256 1149#endif 1150]) 1151 1152dnl Define IPV6_MIN_MTU if not defined 1153AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU], 1154[ 1155#ifndef IPV6_MIN_MTU 1156#define IPV6_MIN_MTU 1280 1157#endif /* IPV6_MIN_MTU */ 1158]) 1159 1160dnl provide snprintf, vsnprintf compat prototype 1161dnl $1: unique name for compat code 1162AC_DEFUN([AHX_CONFIG_SNPRINTF], 1163[ 1164#ifndef HAVE_SNPRINTF 1165#define snprintf snprintf_$1 1166#define vsnprintf vsnprintf_$1 1167#include <stdarg.h> 1168int snprintf (char *str, size_t count, const char *fmt, ...); 1169int vsnprintf (char *str, size_t count, const char *fmt, va_list arg); 1170#endif /* HAVE_SNPRINTF */ 1171]) 1172 1173dnl provide inet_pton compat prototype. 1174dnl $1: unique name for compat code 1175AC_DEFUN([AHX_CONFIG_INET_PTON], 1176[ 1177#ifndef HAVE_INET_PTON 1178#define inet_pton inet_pton_$1 1179int inet_pton(int af, const char* src, void* dst); 1180#endif /* HAVE_INET_PTON */ 1181]) 1182 1183dnl provide inet_ntop compat prototype. 1184dnl $1: unique name for compat code 1185AC_DEFUN([AHX_CONFIG_INET_NTOP], 1186[ 1187#ifndef HAVE_INET_NTOP 1188#define inet_ntop inet_ntop_$1 1189const char *inet_ntop(int af, const void *src, char *dst, size_t size); 1190#endif 1191]) 1192 1193dnl provide inet_aton compat prototype. 1194dnl $1: unique name for compat code 1195AC_DEFUN([AHX_CONFIG_INET_ATON], 1196[ 1197#ifndef HAVE_INET_ATON 1198#define inet_aton inet_aton_$1 1199int inet_aton(const char *cp, struct in_addr *addr); 1200#endif 1201]) 1202 1203dnl provide memmove compat prototype. 1204dnl $1: unique name for compat code 1205AC_DEFUN([AHX_CONFIG_MEMMOVE], 1206[ 1207#ifndef HAVE_MEMMOVE 1208#define memmove memmove_$1 1209void *memmove(void *dest, const void *src, size_t n); 1210#endif 1211]) 1212 1213dnl provide strlcat compat prototype. 1214dnl $1: unique name for compat code 1215AC_DEFUN([AHX_CONFIG_STRLCAT], 1216[ 1217#ifndef HAVE_STRLCAT 1218#define strlcat strlcat_$1 1219size_t strlcat(char *dst, const char *src, size_t siz); 1220#endif 1221]) 1222 1223dnl provide strlcpy compat prototype. 1224dnl $1: unique name for compat code 1225AC_DEFUN([AHX_CONFIG_STRLCPY], 1226[ 1227#ifndef HAVE_STRLCPY 1228#define strlcpy strlcpy_$1 1229size_t strlcpy(char *dst, const char *src, size_t siz); 1230#endif 1231]) 1232 1233dnl provide gmtime_r compat prototype. 1234dnl $1: unique name for compat code 1235AC_DEFUN([AHX_CONFIG_GMTIME_R], 1236[ 1237#ifndef HAVE_GMTIME_R 1238#define gmtime_r gmtime_r_$1 1239struct tm *gmtime_r(const time_t *timep, struct tm *result); 1240#endif 1241]) 1242 1243dnl provide reallocarray compat prototype. 1244dnl $1: unique name for compat code 1245AC_DEFUN([AHX_CONFIG_REALLOCARRAY], 1246[ 1247#ifndef HAVE_REALLOCARRAY 1248#define reallocarray reallocarray$1 1249void* reallocarray(void *ptr, size_t nmemb, size_t size); 1250#endif 1251]) 1252 1253dnl provide w32 compat definition for sleep 1254AC_DEFUN([AHX_CONFIG_W32_SLEEP], 1255[ 1256#if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H) 1257#define sleep(x) Sleep((x)*1000) /* on win32 */ 1258#endif /* HAVE_SLEEP */ 1259]) 1260 1261dnl provide w32 compat definition for usleep 1262AC_DEFUN([AHX_CONFIG_W32_USLEEP], 1263[ 1264#ifndef HAVE_USLEEP 1265#define usleep(x) Sleep((x)/1000 + 1) /* on win32 */ 1266#endif /* HAVE_USLEEP */ 1267]) 1268 1269dnl provide w32 compat definition for random 1270AC_DEFUN([AHX_CONFIG_W32_RANDOM], 1271[ 1272#ifndef HAVE_RANDOM 1273#define random rand /* on win32, for tests only (bad random) */ 1274#endif /* HAVE_RANDOM */ 1275]) 1276 1277dnl provide w32 compat definition for srandom 1278AC_DEFUN([AHX_CONFIG_W32_SRANDOM], 1279[ 1280#ifndef HAVE_SRANDOM 1281#define srandom(x) srand(x) /* on win32, for tests only (bad random) */ 1282#endif /* HAVE_SRANDOM */ 1283]) 1284 1285dnl provide w32 compat definition for FD_SET_T 1286AC_DEFUN([AHX_CONFIG_W32_FD_SET_T], 1287[ 1288/* detect if we need to cast to unsigned int for FD_SET to avoid warnings */ 1289#ifdef HAVE_WINSOCK2_H 1290#define FD_SET_T (u_int) 1291#else 1292#define FD_SET_T 1293#endif 1294]) 1295 1296dnl Remove an extension flag from CFLAGS, define replacement to be made. 1297dnl Used by ACX_STRIP_EXT_FLAGS. 1298dnl $1: the name of the flag, for example -D_GNU_SOURCE. 1299AC_DEFUN([ACX_CFLAGS_STRIP], 1300[ 1301 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then 1302 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`" 1303 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h) 1304 fi 1305]) 1306 1307dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h 1308dnl use with ACX_DETERMINE_EXT_FLAGS. 1309AC_DEFUN([ACX_STRIP_EXT_FLAGS], 1310[ 1311 AC_MSG_NOTICE([Stripping extension flags...]) 1312 ACX_CFLAGS_STRIP(-D_GNU_SOURCE) 1313 ACX_CFLAGS_STRIP(-D_BSD_SOURCE) 1314 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE) 1315 ACX_CFLAGS_STRIP(-D__EXTENSIONS__) 1316 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112) 1317 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600) 1318 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1) 1319 ACX_CFLAGS_STRIP(-D_ALL_SOURCE) 1320 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1) 1321]) dnl End of ACX_STRIP_EXT_FLAGS 1322 1323dnl define one omitted flag for config.h 1324dnl $1: flag name. -D_GNU_SOURCE 1325dnl $2: replacement define. _GNU_SOURCE 1326dnl $3: define value, 1 1327AC_DEFUN([AHX_CONFIG_FLAG_OMITTED], 1328[#if defined($1) && !defined($2) 1329#define $2 $3 1330[#]endif ]) 1331 1332dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags 1333dnl $1: the -DNAME or -DNAME=value string. 1334AC_DEFUN([AHX_CONFIG_FLAG_EXT], 1335[AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,))) 1336]) 1337 1338dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS. 1339AC_DEFUN([AHX_CONFIG_EXT_FLAGS], 1340[AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE) 1341AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE) 1342AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE) 1343AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__) 1344AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112) 1345AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600) 1346AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1) 1347AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE) 1348AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1) 1349]) 1350 1351dnl check if memcmp is using signed characters and replace if so. 1352AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED], 1353[AC_MSG_CHECKING([if memcmp compares unsigned]) 1354AC_RUN_IFELSE([AC_LANG_SOURCE([[ 1355#include <stdio.h> 1356#include <stdlib.h> 1357#include <string.h> 1358int main(void) 1359{ 1360 char a = 255, b = 0; 1361 if(memcmp(&a, &b, 1) < 0) 1362 return 1; 1363 return 0; 1364} 1365]])], [AC_MSG_RESULT([yes]) ], 1366[ AC_MSG_RESULT([no]) 1367 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes]) 1368 AC_LIBOBJ([memcmp]) 1369], [ AC_MSG_RESULT([cross-compile no]) 1370 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes]) 1371 AC_LIBOBJ([memcmp]) 1372]) ]) 1373 1374dnl define memcmp to its replacement, pass unique id for program as arg 1375AC_DEFUN([AHX_MEMCMP_BROKEN], [ 1376#ifdef MEMCMP_IS_BROKEN 1377#include "compat/memcmp.h" 1378#define memcmp memcmp_$1 1379int memcmp(const void *x, const void *y, size_t n); 1380#endif 1381]) 1382 1383dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family 1384AC_DEFUN([ACX_CHECK_SS_FAMILY], 1385[AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [ 1386 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [ 1387 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage]) 1388 ],, [AC_INCLUDES_DEFAULT 1389#ifdef HAVE_NETINET_IN_H 1390#include <netinet/in.h> 1391#endif 1392#ifdef HAVE_SYS_SOCKET_H 1393#include <sys/socket.h> 1394#endif 1395#ifdef HAVE_NETDB_H 1396#include <netdb.h> 1397#endif 1398#ifdef HAVE_ARPA_INET_H 1399#include <arpa/inet.h> 1400#endif 1401 ]) 1402], [AC_INCLUDES_DEFAULT 1403#ifdef HAVE_NETINET_IN_H 1404#include <netinet/in.h> 1405#endif 1406#ifdef HAVE_SYS_SOCKET_H 1407#include <sys/socket.h> 1408#endif 1409#ifdef HAVE_NETDB_H 1410#include <netdb.h> 1411#endif 1412#ifdef HAVE_ARPA_INET_H 1413#include <arpa/inet.h> 1414#endif 1415]) ]) 1416 1417dnl Check if CC and linker support -fPIE and -pie. 1418dnl If so, sets them in CFLAGS / LDFLAGS. 1419AC_DEFUN([ACX_CHECK_PIE], [ 1420 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)])) 1421 AS_IF([test "x$enable_pie" = "xyes"], [ 1422 AC_MSG_CHECKING([if $CC supports PIE]) 1423 BAKLDFLAGS="$LDFLAGS" 1424 BAKCFLAGS="$CFLAGS" 1425 LDFLAGS="$LDFLAGS -pie" 1426 CFLAGS="$CFLAGS -fPIE" 1427 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 1428 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then 1429 LDFLAGS="$BAKLDFLAGS" 1430 AC_MSG_RESULT(no) 1431 else 1432 AC_MSG_RESULT(yes) 1433 fi 1434 rm -f conftest conftest.c conftest.o 1435 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)]) 1436 ]) 1437]) 1438 1439dnl Check if linker supports -Wl,-z,relro,-z,now. 1440dnl If so, adds it to LDFLAGS. 1441AC_DEFUN([ACX_CHECK_RELRO_NOW], [ 1442 AC_ARG_ENABLE([relro_now], AS_HELP_STRING([--enable-relro-now], [Enable full relocation binding at load-time (RELRO NOW, to protect GOT and .dtor areas)])) 1443 AS_IF([test "x$enable_relro_now" = "xyes"], [ 1444 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now]) 1445 BAKLDFLAGS="$LDFLAGS" 1446 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now" 1447 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 1448 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then 1449 LDFLAGS="$BAKLDFLAGS" 1450 AC_MSG_RESULT(no) 1451 else 1452 AC_MSG_RESULT(yes) 1453 fi 1454 rm -f conftest conftest.c conftest.o 1455 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)]) 1456 ]) 1457]) 1458 1459dnl End of file 1460