1 # acx_nlnetlabs.m4 - common macros for configure checks 2 # Copyright 2009, Wouter Wijngaards, NLnet Labs. 3 # BSD licensed. 4 # 5 # Version 48 6 # 2024-01-16 fix to add -l:libssp.a to -lcrypto link check. 7 # and check for getaddrinfo with only header. 8 # 2024-01-15 fix to add crypt32 to -lcrypto link check when checking for gdi32. 9 # 2023-05-04 fix to remove unused whitespace. 10 # 2023-01-26 fix -Wstrict-prototypes. 11 # 2022-09-01 fix checking if nonblocking sockets work on OpenBSD. 12 # 2021-08-17 fix sed script in ssldir split handling. 13 # 2021-08-17 fix for openssl to detect split version, with ssldir_include 14 # and ssldir_lib output directories. 15 # 2021-07-30 fix for openssl use of lib64 directory. 16 # 2021-06-14 fix nonblocking test to use host instead of target for mingw test. 17 # 2021-05-17 fix nonblocking socket test from grep on mingw32 to mingw for 18 # 64bit compatibility. 19 # 2021-03-24 fix ACX_FUNC_DEPRECATED to use CPPFLAGS and CFLAGS. 20 # 2021-01-05 fix defun for aclocal 21 # 2021-01-05 autoconf 2.70 autoupdate and fixes, no AC_TRY_COMPILE 22 # 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0). 23 # 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0. 24 # 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0). 25 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20 26 # 2015-12-11 FLTO check for new OSX, clang. 27 # 2015-11-18 spelling check fix. 28 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly. 29 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added. 30 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added 31 # 2013-09-19 FLTO help text improved. 32 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes 33 # 2013-06-25 FLTO has --disable-flto option. 34 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it. 35 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers. 36 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h. 37 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns. 38 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc. 39 # Fix ACX_MALLOC for redefined malloc error. 40 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32 41 # 2011-11-10 Fix FLTO test to not drop a.out in current directory. 42 # 2011-11-01 Fix FLTO test for llvm on Lion. 43 # 2011-08-01 Fix nonblock test (broken at v13). 44 # 2011-08-01 Fix autoconf 2.68 warnings 45 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto. 46 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66. 47 # 2010-07-02 Add check for ss_family (for minix). 48 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS. 49 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end. 50 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl 51 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN 52 # 2010-01-20 added AHX_COONFIG_STRLCAT 53 # 2009-07-14 U_CHAR detection improved for windows crosscompile. 54 # added ACX_FUNC_MALLOC 55 # fixup some #if to #ifdef 56 # NONBLOCKING test for mingw crosscompile. 57 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL 58 # 2009-07-03 fixup LDFLAGS for empty ssl dir. 59 # 60 # Automates some of the checking constructs. Aims at portability for POSIX. 61 # Documentation for functions is below. 62 # 63 # the following macro's are provided in this file: 64 # (see below for details on each macro). 65 # 66 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc. 67 # ACX_RSRC_VERSION - create windows resource version number. 68 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag. 69 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below). 70 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly. 71 # ACX_DEPFLAG - find cc dependency flags. 72 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX. 73 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax. 74 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax. 75 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so. 76 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved. 77 # ACX_TYPE_U_CHAR - u_char type. 78 # ACX_TYPE_RLIM_T - rlim_t type. 79 # ACX_TYPE_SOCKLEN_T - socklen_t type. 80 # ACX_TYPE_IN_ADDR_T - in_addr_t type. 81 # ACX_TYPE_IN_PORT_T - in_port_t type. 82 # ACX_ARG_RPATH - add --disable-rpath option. 83 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto. 84 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto, 85 # where --without-ssl is also accepted 86 # ACX_LIB_SSL - setup to link -lssl. 87 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files. 88 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably. 89 # ACX_FUNC_DEPRECATED - see if func is deprecated. 90 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work. 91 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments. 92 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably. 93 # ACX_FUNC_MALLOC - check malloc, define replacement . 94 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format. 95 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused. 96 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback. 97 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed. 98 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed. 99 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed. 100 # AHX_CONFIG_SNPRINTF - snprintf compat prototype 101 # AHX_CONFIG_INET_PTON - inet_pton compat prototype 102 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype 103 # AHX_CONFIG_INET_ATON - inet_aton compat prototype 104 # AHX_CONFIG_MEMMOVE - memmove compat prototype 105 # AHX_CONFIG_STRLCAT - strlcat compat prototype 106 # AHX_CONFIG_STRLCPY - strlcpy compat prototype 107 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype 108 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep 109 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep 110 # AHX_CONFIG_W32_RANDOM - w32 compat for random 111 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom 112 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T. 113 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS 114 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS 115 # AHX_CONFIG_FLAG_OMITTED - define omitted flag 116 # AHX_CONFIG_FLAG_EXT - define omitted extension flag 117 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags 118 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters. 119 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED. 120 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family 121 # ACX_CHECK_PIE - add --enable-pie option and check if works 122 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it 123 # 124 125 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines. 126 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var) 127 dnl $1: the text to change. 128 dnl $2: the result. 129 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`" 130 ]) 131 132 dnl Calculate comma separated windows-resource numbers from package version. 133 dnl Picks the first three(,0) or four numbers out of the name. 134 dnl $1: variable for the result 135 AC_DEFUN([ACX_RSRC_VERSION], 136 [$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/' `] 137 ]) 138 139 dnl Routine to help check for compiler flags. 140 dnl Checks if the compiler will accept the flag. 141 dnl $1: the flag without a - in front, so g to check -g. 142 dnl $2: executed if yes 143 dnl $3: executed if no 144 AC_DEFUN([ACX_CHECK_COMPILER_FLAG], 145 [ 146 AC_REQUIRE([AC_PROG_CC]) 147 AC_MSG_CHECKING(whether $CC supports -$1) 148 cache=`echo $1 | sed 'y%.=/+-%___p_%'` 149 AC_CACHE_VAL(cv_prog_cc_flag_$cache, 150 [ 151 echo 'void f(void){}' >conftest.c 152 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then 153 eval "cv_prog_cc_flag_$cache=yes" 154 else 155 eval "cv_prog_cc_flag_$cache=no" 156 fi 157 rm -f conftest conftest.o conftest.c 158 ]) 159 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then 160 AC_MSG_RESULT(yes) 161 : 162 $2 163 else 164 AC_MSG_RESULT(no) 165 : 166 $3 167 fi 168 ]) 169 170 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED 171 dnl ERRFLAG: result, compiler flag to turn warnings into errors 172 AC_DEFUN([ACX_CHECK_ERROR_FLAGS], 173 [ 174 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"]) 175 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"], 176 [ERRFLAG="$ERRFLAG -errfmt"]) 177 ]) 178 179 dnl Routine to help check for needed compiler flags. 180 dnl $1: flags for CC 181 dnl $2: the includes and code 182 dnl $3: if the given code only compiles with the flag, execute argument 3 183 dnl $4: if the given code compiles without the flag, execute argument 4 184 dnl $5: with and without flag the compile fails, execute argument 5. 185 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED], 186 [ 187 AC_REQUIRE([AC_PROG_CC]) 188 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS]) 189 AC_MSG_CHECKING(whether we need $1 as a flag for $CC) 190 cache=AS_TR_SH($1) 191 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'` 192 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache, 193 [ 194 echo '$2' > conftest.c 195 echo 'void f(void){}' >>conftest.c 196 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then 197 eval "cv_prog_cc_flag_needed_$cache=no" 198 else 199 [ 200 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then 201 eval "cv_prog_cc_flag_needed_$cache=yes" 202 else 203 eval "cv_prog_cc_flag_needed_$cache=fail" 204 #echo 'Test with flag fails too!' 205 #cat conftest.c 206 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1" 207 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1` 208 #exit 1 209 fi 210 ] 211 fi 212 rm -f conftest conftest.c conftest.o 213 ]) 214 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then 215 AC_MSG_RESULT(yes) 216 : 217 $3 218 else 219 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then 220 AC_MSG_RESULT(no) 221 #echo 'Test with flag is no!' 222 #cat conftest.c 223 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1" 224 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1` 225 #exit 1 226 : 227 $4 228 else 229 AC_MSG_RESULT(failed) 230 : 231 $5 232 fi 233 fi 234 ]) 235 236 dnl Check for CC dependency flag 237 dnl DEPFLAG: set to flag that generates dependencies. 238 AC_DEFUN([ACX_DEPFLAG], 239 [ 240 AC_MSG_CHECKING([$CC dependency flag]) 241 echo 'void f(void){}' >conftest.c 242 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then 243 DEPFLAG="-MM" 244 else 245 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then 246 DEPFLAG="-xM1" 247 else 248 DEPFLAG="-MM" # dunno do something 249 fi 250 fi 251 AC_MSG_RESULT($DEPFLAG) 252 rm -f conftest.c 253 AC_SUBST(DEPFLAG) 254 ]) 255 256 dnl Determine flags that gives POSIX and BSD functionality. 257 dnl CFLAGS is modified for the result. 258 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND], 259 [ 260 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"]) 261 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"]) 262 263 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT]) 264 265 ACX_CHECK_COMPILER_FLAG_NEEDED($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, 266 [ 267 #include "confdefs.h" 268 #include <stdlib.h> 269 #include <ctype.h> 270 #include <sys/time.h> 271 #ifdef HAVE_TIME_H 272 #include <time.h> 273 #endif 274 #include <unistd.h> 275 #include <netdb.h> 276 #ifdef HAVE_GETOPT_H 277 #include <getopt.h> 278 #endif 279 280 int test(void) { 281 int a; 282 char **opts = NULL; 283 struct timeval tv; 284 char *t; 285 time_t time = 0; 286 char *buf = NULL; 287 const char* str = NULL; 288 struct msghdr msg; 289 msg.msg_control = 0; 290 t = ctime_r(&time, buf); 291 tv.tv_usec = 10; 292 srandom(32); 293 a = getopt(2, opts, "a"); 294 a = isascii(32); 295 str = gai_strerror(0); 296 if(str && t && tv.tv_usec && msg.msg_control) 297 a = 0; 298 return a; 299 } 300 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"]) 301 302 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE, 303 [ 304 #include "confdefs.h" 305 #include <stdlib.h> 306 #include <ctype.h> 307 #include <sys/time.h> 308 #ifdef HAVE_TIME_H 309 #include <time.h> 310 #endif 311 #include <unistd.h> 312 #include <netdb.h> 313 #ifdef HAVE_GETOPT_H 314 #include <getopt.h> 315 #endif 316 317 int test(void) { 318 int a; 319 char **opts = NULL; 320 struct timeval tv; 321 char *t; 322 time_t time = 0; 323 char *buf = NULL; 324 const char* str = NULL; 325 struct msghdr msg; 326 msg.msg_control = 0; 327 t = ctime_r(&time, buf); 328 tv.tv_usec = 10; 329 srandom(32); 330 a = getopt(2, opts, "a"); 331 a = isascii(32); 332 str = gai_strerror(0); 333 if(str && t && tv.tv_usec && msg.msg_control) 334 a = 0; 335 return a; 336 } 337 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"]) 338 339 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG, 340 [ 341 #include <stdbool.h> 342 #include <ctype.h> 343 int test(void) { 344 int a = 0; 345 return a; 346 } 347 ], [CFLAGS="$CFLAGS $C99FLAG"]) 348 349 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE, 350 [ 351 #include <ctype.h> 352 353 int test(void) { 354 int a; 355 a = isascii(32); 356 return a; 357 } 358 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"]) 359 360 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE, 361 [ 362 #include <netinet/in.h> 363 364 int test(void) { 365 struct in6_pktinfo inf; 366 int a = (int)sizeof(inf); 367 return a; 368 } 369 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"]) 370 371 # check again for GNU_SOURCE for setresgid. May fail if setresgid 372 # is not available at all. -D_FRSRESGID is to make this check unique. 373 # otherwise we would get the previous cached result. 374 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID, 375 [ 376 #include <unistd.h> 377 378 int test(void) { 379 int a = setresgid(0,0,0); 380 a = setresuid(0,0,0); 381 return a; 382 } 383 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"]) 384 385 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112, 386 [ 387 #include "confdefs.h" 388 #ifdef HAVE_TIME_H 389 #include <time.h> 390 #endif 391 #include <netdb.h> 392 393 int test(void) { 394 int a = 0; 395 char *t; 396 time_t time = 0; 397 char *buf = NULL; 398 const char* str = NULL; 399 t = ctime_r(&time, buf); 400 str = gai_strerror(0); 401 if(t && str) 402 a = 0; 403 return a; 404 } 405 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"]) 406 407 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__, 408 [ 409 #include "confdefs.h" 410 #include <stdlib.h> 411 #include <ctype.h> 412 #include <sys/time.h> 413 #ifdef HAVE_TIME_H 414 #include <time.h> 415 #endif 416 #include <unistd.h> 417 #ifdef HAVE_GETOPT_H 418 #include <getopt.h> 419 #endif 420 421 int test(void) { 422 int a; 423 char **opts = NULL; 424 struct timeval tv; 425 tv.tv_usec = 10; 426 srandom(32); 427 a = getopt(2, opts, "a"); 428 a = isascii(32); 429 if(tv.tv_usec) 430 a = 0; 431 return a; 432 } 433 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"]) 434 435 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND 436 437 dnl Check if CC supports -flto. 438 dnl in a way that supports clang and suncc (that flag does something else, 439 dnl but fails to link). It sets it in CFLAGS if it works. 440 AC_DEFUN([ACX_CHECK_FLTO], [ 441 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)])) 442 AS_IF([test "x$enable_flto" != "xno"], [ 443 AC_MSG_CHECKING([if $CC supports -flto]) 444 BAKCFLAGS="$CFLAGS" 445 CFLAGS="$CFLAGS -flto" 446 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 447 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then 448 CFLAGS="$BAKCFLAGS" 449 AC_MSG_RESULT(no) 450 else 451 AC_MSG_RESULT(yes) 452 fi 453 rm -f conftest conftest.c conftest.o 454 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)]) 455 ]) 456 ]) 457 458 dnl Check the printf-format attribute (if any) 459 dnl result in HAVE_ATTR_FORMAT. 460 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE. 461 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE], 462 [AC_REQUIRE([AC_PROG_CC]) 463 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute) 464 AC_CACHE_VAL(ac_cv_c_format_attribute, 465 [ac_cv_c_format_attribute=no 466 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> 467 void f (char *format, ...) __attribute__ ((format (printf, 1, 2))); 468 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2))); 469 ]], [[ 470 f ("%s", "str"); 471 ]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"]) 472 ]) 473 474 AC_MSG_RESULT($ac_cv_c_format_attribute) 475 if test $ac_cv_c_format_attribute = yes; then 476 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute]) 477 fi 478 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE 479 480 dnl Setup ATTR_FORMAT config.h parts. 481 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also. 482 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE], 483 [ 484 #ifdef HAVE_ATTR_FORMAT 485 # define ATTR_FORMAT(archetype, string_index, first_to_check) \ 486 __attribute__ ((format (archetype, string_index, first_to_check))) 487 #else /* !HAVE_ATTR_FORMAT */ 488 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */ 489 #endif /* !HAVE_ATTR_FORMAT */ 490 ]) 491 492 dnl Check how to mark function arguments as unused. 493 dnl result in HAVE_ATTR_UNUSED. 494 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also. 495 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE], 496 [AC_REQUIRE([AC_PROG_CC]) 497 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute) 498 AC_CACHE_VAL(ac_cv_c_unused_attribute, 499 [ac_cv_c_unused_attribute=no 500 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> 501 void f (char *u __attribute__((unused))); 502 ]], [[ 503 f ("x"); 504 ]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"]) 505 ]) 506 507 dnl Setup ATTR_UNUSED config.h parts. 508 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also. 509 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE], 510 [ 511 #if defined(DOXYGEN) 512 # define ATTR_UNUSED(x) x 513 #elif defined(__cplusplus) 514 # define ATTR_UNUSED(x) 515 #elif defined(HAVE_ATTR_UNUSED) 516 # define ATTR_UNUSED(x) x __attribute__((unused)) 517 #else /* !HAVE_ATTR_UNUSED */ 518 # define ATTR_UNUSED(x) x 519 #endif /* !HAVE_ATTR_UNUSED */ 520 ]) 521 522 AC_MSG_RESULT($ac_cv_c_unused_attribute) 523 if test $ac_cv_c_unused_attribute = yes; then 524 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute]) 525 fi 526 ])dnl 527 528 dnl Pre-fun for ACX_LIBTOOL_C_ONLY 529 AC_DEFUN([ACX_LIBTOOL_C_PRE], [ 530 # skip these tests, we do not need them. 531 AC_DEFUN([AC_PROG_F77], [:]) 532 AC_DEFUN([AC_PROG_FC], [:]) 533 AC_DEFUN([AC_PROG_CXX], [:]) 534 AC_DEFUN([AC_PROG_CXXCPP], [:]) 535 AC_DEFUN([AC_PROG_OBJC], [:]) 536 AC_DEFUN([AC_PROG_OBJCCPP], [:]) 537 AC_DEFUN([AC_LIBTOOL_CXX], [:]) 538 AC_DEFUN([AC_LIBTOOL_F77], [:]) 539 # always use ./libtool unless override from commandline (libtool=mylibtool) 540 if test -z "$libtool"; then 541 libtool="./libtool" 542 fi 543 AC_SUBST(libtool) 544 # avoid libtool max commandline length test on systems that fork slowly. 545 AC_CANONICAL_HOST 546 if echo "$host_os" | grep "sunos4" >/dev/null; then 547 lt_cv_sys_max_cmd_len=32750; 548 fi 549 AC_PATH_TOOL(AR, ar, [false]) 550 if test $AR = false; then 551 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it]) 552 fi 553 ]) 554 555 dnl Perform libtool check, portably, only for C 556 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [ 557 dnl as a requirement so that is gets called before LIBTOOL 558 dnl because libtools 'AC_REQUIRE' names are right after this one, before 559 dnl this function contents. 560 AC_REQUIRE([ACX_LIBTOOL_C_PRE]) 561 LT_INIT 562 ]) 563 564 dnl Detect if u_char type is defined, otherwise define it. 565 AC_DEFUN([ACX_TYPE_U_CHAR], 566 [AC_CHECK_TYPE([u_char], , 567 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [ 568 AC_INCLUDES_DEFAULT 569 #ifdef HAVE_WINSOCK2_H 570 # include <winsock2.h> 571 #endif 572 ]) ]) 573 574 dnl Detect if rlim_t type is defined, otherwise define it. 575 AC_DEFUN([ACX_TYPE_RLIM_T], 576 [AC_CHECK_TYPE(rlim_t, , 577 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [ 578 AC_INCLUDES_DEFAULT 579 #ifdef HAVE_SYS_RESOURCE_H 580 # include <sys/resource.h> 581 #endif 582 ]) ]) 583 584 dnl Detect if socklen_t type is defined, otherwise define it. 585 AC_DEFUN([ACX_TYPE_SOCKLEN_T], 586 [ 587 AC_CHECK_TYPE(socklen_t, , 588 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [ 589 AC_INCLUDES_DEFAULT 590 #ifdef HAVE_SYS_SOCKET_H 591 # include <sys/socket.h> 592 #endif 593 #ifdef HAVE_WS2TCPIP_H 594 # include <ws2tcpip.h> 595 #endif 596 ]) ]) 597 598 dnl Detect if in_addr_t type is defined, otherwise define it. 599 AC_DEFUN([ACX_TYPE_IN_ADDR_T], 600 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [ 601 AC_INCLUDES_DEFAULT 602 #ifdef HAVE_SYS_TYPES_H 603 # include <sys/types.h> 604 #endif 605 #ifdef HAVE_NETINET_IN_H 606 # include <netinet/in.h> 607 #endif 608 ]) ]) 609 610 dnl Detect if in_port_t type is defined, otherwise define it. 611 AC_DEFUN([ACX_TYPE_IN_PORT_T], 612 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [ 613 AC_INCLUDES_DEFAULT 614 #ifdef HAVE_SYS_TYPES_H 615 # include <sys/types.h> 616 #endif 617 #ifdef HAVE_NETINET_IN_H 618 # include <netinet/in.h> 619 #endif 620 ]) ]) 621 622 dnl Add option to disable the evil rpath. Check whether to use rpath or not. 623 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool. 624 AC_DEFUN([ACX_ARG_RPATH], 625 [ 626 AC_ARG_ENABLE(rpath, 627 [ --disable-rpath disable hardcoded rpath (default=enabled)], 628 enable_rpath=$enableval, enable_rpath=yes) 629 if test "x$enable_rpath" = xno; then 630 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.]) 631 AC_CONFIG_COMMANDS([disable-rpath], [ 632 sed < libtool > libtool-2 \ 633 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/' 634 mv libtool-2 libtool 635 chmod 755 libtool 636 libtool="./libtool" 637 ]) 638 fi 639 ]) 640 641 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is 642 dnl an absolute path. 643 dnl $1: the pathname to add. 644 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [ 645 if test "x$enable_rpath" = xyes; then 646 if echo "$1" | grep "^/" >/dev/null; then 647 RUNTIME_PATH="$RUNTIME_PATH -R$1" 648 fi 649 fi 650 ]) 651 652 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL 653 dnl Takes one argument; the withval checked in those 2 functions 654 dnl sets up the environment for the given openssl path 655 AC_DEFUN([ACX_SSL_CHECKS], [ 656 withval=$1 657 if test x_$withval != x_no; then 658 AC_MSG_CHECKING(for SSL) 659 if test -n "$withval"; then 660 dnl look for openssl install with different version, eg. 661 dnl in /usr/include/openssl11/openssl/ssl.h 662 dnl and /usr/lib64/openssl11/libssl.so 663 dnl with the --with-ssl=/usr/include/openssl11 664 if test ! -f "$withval/include/openssl/ssl.h" -a -f "$withval/openssl/ssl.h"; then 665 ssldir="$withval" 666 found_ssl="yes" 667 withval="" 668 ssldir_include="$ssldir" 669 dnl find the libdir 670 ssldir_lib=`echo $ssldir | sed -e 's/include/lib/'` 671 if test -f "$ssldir_lib/libssl.a" -o -f "$ssldir_lib/libssl.so"; then 672 : # found here 673 else 674 ssldir_lib=`echo $ssldir | sed -e 's/include/lib64/'` 675 if test -f "$ssldir_lib/libssl.a" -o -f "$ssldir_lib/libssl.so"; then 676 : # found here 677 else 678 AC_MSG_ERROR([Could not find openssl lib file, $ssldir_lib/libssl.[so,a], pass like "/usr/local" or "/usr/include/openssl11"]) 679 fi 680 fi 681 fi 682 fi 683 if test x_$withval = x_ -o x_$withval = x_yes; then 684 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr" 685 fi 686 for dir in $withval; do 687 ssldir="$dir" 688 if test -f "$dir/include/openssl/ssl.h"; then 689 found_ssl="yes" 690 ssldir_include="$ssldir/include" 691 if test ! -d "$ssldir/lib" -a -d "$ssldir/lib64"; then 692 ssldir_lib="$ssldir/lib64" 693 else 694 ssldir_lib="$ssldir/lib" 695 fi 696 break; 697 fi 698 done 699 if test x_$found_ssl != x_yes; then 700 AC_MSG_ERROR(Cannot find the SSL libraries in $withval) 701 else 702 AC_MSG_RESULT(found in $ssldir) 703 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.]) 704 HAVE_SSL=yes 705 dnl assume /usr is already in the include, lib and dynlib paths. 706 if test "$ssldir" != "/usr"; then 707 CPPFLAGS="$CPPFLAGS -I$ssldir_include" 708 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir_include" 709 LDFLAGS="$LDFLAGS -L$ssldir_lib" 710 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir_lib" 711 ACX_RUNTIME_PATH_ADD([$ssldir_lib]) 712 fi 713 714 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto]) 715 LIBS="$LIBS -lcrypto" 716 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto" 717 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 718 int EVP_sha256(void); 719 (void)EVP_sha256(); 720 ]])],[ 721 AC_MSG_RESULT(yes) 722 AC_DEFINE([HAVE_EVP_SHA256], 1, 723 [If you have EVP_sha256]) 724 ],[ 725 AC_MSG_RESULT(no) 726 # check if -lwsock32 or -lgdi32 are needed. 727 BAKLIBS="$LIBS" 728 BAKSSLLIBS="$LIBSSL_LIBS" 729 LIBS="$LIBS -lgdi32 -lws2_32" 730 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32" 731 AC_MSG_CHECKING([if -lcrypto needs -lgdi32]) 732 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 733 int EVP_sha256(void); 734 (void)EVP_sha256(); 735 ]])],[ 736 AC_DEFINE([HAVE_EVP_SHA256], 1, 737 [If you have EVP_sha256]) 738 AC_MSG_RESULT(yes) 739 ],[ 740 AC_MSG_RESULT(no) 741 LIBS="$BAKLIBS" 742 LIBSSL_LIBS="$BAKSSLLIBS" 743 744 LIBS="$LIBS -lgdi32 -lws2_32 -lcrypt32" 745 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32 -lcrypt32" 746 AC_MSG_CHECKING([if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32]) 747 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 748 int EVP_sha256(void); 749 (void)EVP_sha256(); 750 ]])],[ 751 AC_DEFINE([HAVE_EVP_SHA256], 1, 752 [If you have EVP_sha256]) 753 AC_MSG_RESULT(yes) 754 ],[ 755 AC_MSG_RESULT(no) 756 LIBS="$BAKLIBS" 757 LIBSSL_LIBS="$BAKSSLLIBS" 758 759 LIBS="$LIBS -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a" 760 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a" 761 AC_MSG_CHECKING([if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a]) 762 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 763 int EVP_sha256(void); 764 (void)EVP_sha256(); 765 ]])],[ 766 AC_DEFINE([HAVE_EVP_SHA256], 1, 767 [If you have EVP_sha256]) 768 AC_MSG_RESULT(yes) 769 ],[ 770 AC_MSG_RESULT(no) 771 LIBS="$BAKLIBS" 772 LIBSSL_LIBS="$BAKSSLLIBS" 773 774 LIBS="$LIBS -ldl" 775 LIBSSL_LIBS="$LIBSSL_LIBS -ldl" 776 AC_MSG_CHECKING([if -lcrypto needs -ldl]) 777 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 778 int EVP_sha256(void); 779 (void)EVP_sha256(); 780 ]])],[ 781 AC_DEFINE([HAVE_EVP_SHA256], 1, 782 [If you have EVP_sha256]) 783 AC_MSG_RESULT(yes) 784 ],[ 785 AC_MSG_RESULT(no) 786 LIBS="$BAKLIBS" 787 LIBSSL_LIBS="$BAKSSLLIBS" 788 LIBS="$LIBS -ldl -pthread" 789 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread" 790 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread]) 791 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ 792 int EVP_sha256(void); 793 (void)EVP_sha256(); 794 ]])],[ 795 AC_DEFINE([HAVE_EVP_SHA256], 1, 796 [If you have EVP_sha256]) 797 AC_MSG_RESULT(yes) 798 ],[ 799 AC_MSG_RESULT(no) 800 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required]) 801 ]) 802 ]) 803 ]) 804 ]) 805 ]) 806 ]) 807 fi 808 AC_SUBST(HAVE_SSL) 809 AC_SUBST(RUNTIME_PATH) 810 fi 811 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT]) 812 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT]) 813 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT]) 814 ])dnl End of ACX_SSL_CHECKS 815 816 dnl Check for SSL, where SSL is mandatory 817 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found 818 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS. 819 dnl Checks main header files of SSL. 820 dnl 821 AC_DEFUN([ACX_WITH_SSL], 822 [ 823 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl 824 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[ 825 ],[ 826 withval="yes" 827 ]) 828 if test x_$withval = x_no; then 829 AC_MSG_ERROR([Need SSL library to do digital signature cryptography]) 830 fi 831 ACX_SSL_CHECKS($withval) 832 ])dnl End of ACX_WITH_SSL 833 834 dnl Check for SSL, where ssl is optional (--without-ssl is allowed) 835 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found 836 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS. 837 dnl Checks main header files of SSL. 838 dnl 839 AC_DEFUN([ACX_WITH_SSL_OPTIONAL], 840 [ 841 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl 842 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[ 843 ],[ 844 withval="yes" 845 ]) 846 ACX_SSL_CHECKS($withval) 847 ])dnl End of ACX_WITH_SSL_OPTIONAL 848 849 dnl Setup to use -lssl 850 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one). 851 AC_DEFUN([ACX_LIB_SSL], 852 [ 853 # check if libssl needs libdl 854 BAKLIBS="$LIBS" 855 LIBS="-lssl $LIBS" 856 AC_MSG_CHECKING([if libssl needs libdl]) 857 AC_TRY_LINK_FUNC([SSL_CTX_new], [ 858 AC_MSG_RESULT([no]) 859 LIBS="$BAKLIBS" 860 ] , [ 861 AC_MSG_RESULT([yes]) 862 LIBS="$BAKLIBS" 863 AC_SEARCH_LIBS([dlopen], [dl]) 864 ]) ])dnl End of ACX_LIB_SSL 865 866 dnl Setup to use very large files (>2Gb). 867 dnl setups fseeko and its own 868 AC_DEFUN([ACX_SYS_LARGEFILE], 869 [ 870 AC_SYS_LARGEFILE 871 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko 872 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1, 873 [ 874 #include <stdio.h> 875 int test(void) { 876 int a = fseeko(stdin, 0, 0); 877 return a; 878 } 879 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"]) 880 ]) 881 882 dnl Check getaddrinfo. 883 dnl Works on linux, solaris, bsd and windows(links winsock). 884 dnl defines HAVE_GETADDRINFO, USE_WINSOCK. 885 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES], 886 [AC_REQUIRE([AC_PROG_CC]) 887 AC_MSG_CHECKING(for getaddrinfo) 888 ac_cv_func_getaddrinfo=no 889 AC_LINK_IFELSE( 890 [AC_LANG_SOURCE([[ 891 #ifdef __cplusplus 892 extern "C" 893 { 894 #endif 895 char* getaddrinfo(); 896 char* (*f) () = getaddrinfo; 897 #ifdef __cplusplus 898 } 899 #endif 900 int main(void) { 901 ; 902 return 0; 903 } 904 ]])], 905 dnl this case on linux, solaris, bsd 906 [ac_cv_func_getaddrinfo="yes" 907 dnl see if on windows 908 if test "$ac_cv_header_windows_h" = "yes"; then 909 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used]) 910 USE_WINSOCK="1" 911 if echo "$LIBS" | grep 'lws2_32' >/dev/null; then 912 : 913 else 914 LIBS="$LIBS -lws2_32" 915 fi 916 fi 917 ], 918 dnl no quick getaddrinfo, try mingw32 and winsock2 library. 919 dnl perhaps getaddrinfo needs only the include 920 AC_LINK_IFELSE( 921 [AC_LANG_PROGRAM( 922 [ 923 #ifdef HAVE_WS2TCPIP_H 924 #include <ws2tcpip.h> 925 #endif 926 ], 927 [ 928 (void)getaddrinfo(NULL, NULL, NULL, NULL); 929 ] 930 )], 931 [ 932 ac_cv_func_getaddrinfo="yes" 933 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used]) 934 USE_WINSOCK="1" 935 ], 936 937 ORIGLIBS="$LIBS" 938 LIBS="$LIBS -lws2_32" 939 AC_LINK_IFELSE( 940 [AC_LANG_PROGRAM( 941 [ 942 #ifdef HAVE_WS2TCPIP_H 943 #include <ws2tcpip.h> 944 #endif 945 ], 946 [ 947 (void)getaddrinfo(NULL, NULL, NULL, NULL); 948 ] 949 )], 950 [ 951 ac_cv_func_getaddrinfo="yes" 952 dnl already: LIBS="$LIBS -lws2_32" 953 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used]) 954 USE_WINSOCK="1" 955 ], 956 [ 957 ac_cv_func_getaddrinfo="no" 958 LIBS="$ORIGLIBS" 959 ]) 960 ) 961 ) 962 963 AC_MSG_RESULT($ac_cv_func_getaddrinfo) 964 if test $ac_cv_func_getaddrinfo = yes; then 965 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available]) 966 fi 967 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES 968 969 dnl check if a function is deprecated. defines DEPRECATED_func in config.h. 970 dnl $1: function name 971 dnl $2: C-statement that calls the function. 972 dnl $3: includes for the program. 973 dnl $4: executes if yes 974 dnl $5: executes if no 975 AC_DEFUN([ACX_FUNC_DEPRECATED], 976 [ 977 AC_REQUIRE([AC_PROG_CC]) 978 AC_MSG_CHECKING(if $1 is deprecated) 979 cache=`echo $1 | sed 'y%.=/+-%___p_%'` 980 AC_CACHE_VAL(cv_cc_deprecated_$cache, 981 [ 982 echo '$3' >conftest.c 983 echo 'void f(void){ $2 }' >>conftest.c 984 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then 985 eval "cv_cc_deprecated_$cache=no" 986 else 987 eval "cv_cc_deprecated_$cache=yes" 988 fi 989 rm -f conftest conftest.o conftest.c 990 ]) 991 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then 992 AC_MSG_RESULT(yes) 993 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated]) 994 : 995 $4 996 else 997 AC_MSG_RESULT(no) 998 : 999 $5 1000 fi 1001 ])dnl end of ACX_FUNC_DEPRECATED 1002 1003 dnl check if select and nonblocking sockets actually work. 1004 dnl Needs fork(2) and select(2). 1005 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from 1006 dnl a nonblocking socket do not work, a new call to select is necessary. 1007 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN], 1008 [ 1009 AC_MSG_CHECKING([if nonblocking sockets work]) 1010 if echo $host | grep mingw >/dev/null; then 1011 AC_MSG_RESULT([no (windows)]) 1012 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).]) 1013 else 1014 AC_RUN_IFELSE([ 1015 AC_LANG_SOURCE([[ 1016 #include <stdio.h> 1017 #include <string.h> 1018 #include <stdlib.h> 1019 #include <fcntl.h> 1020 #include <errno.h> 1021 #ifdef HAVE_SYS_TYPES_H 1022 #include <sys/types.h> 1023 #endif 1024 #ifdef HAVE_SYS_SELECT_H 1025 #include <sys/select.h> 1026 #endif 1027 #ifdef HAVE_SYS_SOCKET_H 1028 #include <sys/socket.h> 1029 #endif 1030 #ifdef HAVE_NETINET_IN_H 1031 #include <netinet/in.h> 1032 #endif 1033 #ifdef HAVE_ARPA_INET_H 1034 #include <arpa/inet.h> 1035 #endif 1036 #ifdef HAVE_UNISTD_H 1037 #include <unistd.h> 1038 #endif 1039 #ifdef HAVE_TIME_H 1040 #include <time.h> 1041 #endif 1042 1043 int main(void) 1044 { 1045 int port; 1046 int sfd, cfd; 1047 int num = 10; 1048 int i, p; 1049 struct sockaddr_in a; 1050 /* test if select and nonblocking reads work well together */ 1051 /* open port. 1052 fork child to send 10 messages. 1053 select to read. 1054 then try to nonblocking read the 10 messages 1055 then, nonblocking read must give EAGAIN 1056 */ 1057 1058 port = 12345 + (time(0)%32); 1059 sfd = socket(PF_INET, SOCK_DGRAM, 0); 1060 if(sfd == -1) { 1061 perror("socket"); 1062 return 1; 1063 } 1064 memset(&a, 0, sizeof(a)); 1065 a.sin_family = AF_INET; 1066 a.sin_port = htons(port); 1067 a.sin_addr.s_addr = inet_addr("127.0.0.1"); 1068 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) { 1069 perror("bind"); 1070 return 1; 1071 } 1072 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) { 1073 perror("fcntl"); 1074 return 1; 1075 } 1076 1077 cfd = socket(PF_INET, SOCK_DGRAM, 0); 1078 if(cfd == -1) { 1079 perror("client socket"); 1080 return 1; 1081 } 1082 a.sin_port = 0; 1083 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) { 1084 perror("client bind"); 1085 return 1; 1086 } 1087 a.sin_port = htons(port); 1088 1089 /* no handler, causes exit in 10 seconds */ 1090 alarm(10); 1091 1092 /* send and receive on the socket */ 1093 if((p=fork()) == 0) { 1094 for(i=0; i<num; i++) { 1095 if(sendto(cfd, &i, sizeof(i), 0, 1096 (struct sockaddr*)&a, sizeof(a)) < 0) { 1097 perror("sendto"); 1098 return 1; 1099 } 1100 } 1101 } else { 1102 /* parent */ 1103 fd_set rset; 1104 int x; 1105 if(p == -1) { 1106 perror("fork"); 1107 return 1; 1108 } 1109 FD_ZERO(&rset); 1110 FD_SET(sfd, &rset); 1111 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) { 1112 perror("select"); 1113 return 1; 1114 } 1115 i = 0; 1116 while(i < num) { 1117 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) { 1118 if(errno == EAGAIN) 1119 continue; 1120 perror("recv"); 1121 return 1; 1122 } 1123 i++; 1124 } 1125 /* now we want to get EAGAIN: nonblocking goodness */ 1126 errno = 0; 1127 recv(sfd, &x, sizeof(x), 0); 1128 if(errno != EAGAIN) { 1129 perror("trying to recv again"); 1130 return 1; 1131 } 1132 /* EAGAIN encountered */ 1133 } 1134 1135 close(sfd); 1136 close(cfd); 1137 return 0; 1138 } 1139 ]])], [ 1140 AC_MSG_RESULT([yes]) 1141 ], [ 1142 AC_MSG_RESULT([no]) 1143 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).]) 1144 ], [ 1145 AC_MSG_RESULT([crosscompile(yes)]) 1146 ]) 1147 fi 1148 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN 1149 1150 dnl Check if mkdir has one or two arguments. 1151 dnl defines MKDIR_HAS_ONE_ARG 1152 AC_DEFUN([ACX_MKDIR_ONE_ARG], 1153 [ 1154 AC_MSG_CHECKING([whether mkdir has one arg]) 1155 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 1156 #include <stdio.h> 1157 #include <unistd.h> 1158 #ifdef HAVE_WINSOCK2_H 1159 #include <winsock2.h> 1160 #endif 1161 #ifdef HAVE_SYS_STAT_H 1162 #include <sys/stat.h> 1163 #endif 1164 ]], [[ 1165 (void)mkdir("directory"); 1166 ]])],[AC_MSG_RESULT(yes) 1167 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.]) 1168 ],[AC_MSG_RESULT(no) 1169 ]) 1170 ])dnl end of ACX_MKDIR_ONE_ARG 1171 1172 dnl Check for ioctlsocket function. works on mingw32 too. 1173 AC_DEFUN([ACX_FUNC_IOCTLSOCKET], 1174 [ 1175 # check ioctlsocket 1176 AC_MSG_CHECKING(for ioctlsocket) 1177 AC_LINK_IFELSE([AC_LANG_PROGRAM([ 1178 #ifdef HAVE_WINSOCK2_H 1179 #include <winsock2.h> 1180 #endif 1181 ], [ 1182 (void)ioctlsocket(0, 0, NULL); 1183 ])], [ 1184 AC_MSG_RESULT(yes) 1185 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available]) 1186 ],[AC_MSG_RESULT(no)]) 1187 ])dnl end of ACX_FUNC_IOCTLSOCKET 1188 1189 dnl detect malloc and provide malloc compat prototype. 1190 dnl $1: unique name for compat code 1191 AC_DEFUN([ACX_FUNC_MALLOC], 1192 [ 1193 AC_MSG_CHECKING([for GNU libc compatible malloc]) 1194 AC_RUN_IFELSE([AC_LANG_PROGRAM( 1195 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H 1196 #include <stdlib.h> 1197 #else 1198 char *malloc (); 1199 #endif 1200 ]], [ if(malloc(0) != 0) return 1;]) 1201 ], 1202 [AC_MSG_RESULT([no]) 1203 AC_LIBOBJ(malloc) 1204 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] , 1205 [AC_MSG_RESULT([yes]) 1206 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])], 1207 [AC_MSG_RESULT([no (crosscompile)]) 1208 AC_LIBOBJ(malloc) 1209 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ) 1210 ]) 1211 1212 dnl Define fallback for fseeko and ftello if needed. 1213 AC_DEFUN([AHX_CONFIG_FSEEKO], 1214 [ 1215 #ifndef HAVE_FSEEKO 1216 #define fseeko fseek 1217 #define ftello ftell 1218 #endif /* HAVE_FSEEKO */ 1219 ]) 1220 1221 dnl Define RAND_MAX if not defined 1222 AC_DEFUN([AHX_CONFIG_RAND_MAX], 1223 [ 1224 #ifndef RAND_MAX 1225 #define RAND_MAX 2147483647 1226 #endif 1227 ]) 1228 1229 dnl Define MAXHOSTNAMELEN if not defined 1230 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN], 1231 [ 1232 #ifndef MAXHOSTNAMELEN 1233 #define MAXHOSTNAMELEN 256 1234 #endif 1235 ]) 1236 1237 dnl Define IPV6_MIN_MTU if not defined 1238 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU], 1239 [ 1240 #ifndef IPV6_MIN_MTU 1241 #define IPV6_MIN_MTU 1280 1242 #endif /* IPV6_MIN_MTU */ 1243 ]) 1244 1245 dnl provide snprintf, vsnprintf compat prototype 1246 dnl $1: unique name for compat code 1247 AC_DEFUN([AHX_CONFIG_SNPRINTF], 1248 [ 1249 #ifndef HAVE_SNPRINTF 1250 #define snprintf snprintf_$1 1251 #define vsnprintf vsnprintf_$1 1252 #include <stdarg.h> 1253 int snprintf (char *str, size_t count, const char *fmt, ...); 1254 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg); 1255 #endif /* HAVE_SNPRINTF */ 1256 ]) 1257 1258 dnl provide inet_pton compat prototype. 1259 dnl $1: unique name for compat code 1260 AC_DEFUN([AHX_CONFIG_INET_PTON], 1261 [ 1262 #ifndef HAVE_INET_PTON 1263 #define inet_pton inet_pton_$1 1264 int inet_pton(int af, const char* src, void* dst); 1265 #endif /* HAVE_INET_PTON */ 1266 ]) 1267 1268 dnl provide inet_ntop compat prototype. 1269 dnl $1: unique name for compat code 1270 AC_DEFUN([AHX_CONFIG_INET_NTOP], 1271 [ 1272 #ifndef HAVE_INET_NTOP 1273 #define inet_ntop inet_ntop_$1 1274 const char *inet_ntop(int af, const void *src, char *dst, size_t size); 1275 #endif 1276 ]) 1277 1278 dnl provide inet_aton compat prototype. 1279 dnl $1: unique name for compat code 1280 AC_DEFUN([AHX_CONFIG_INET_ATON], 1281 [ 1282 #ifndef HAVE_INET_ATON 1283 #define inet_aton inet_aton_$1 1284 int inet_aton(const char *cp, struct in_addr *addr); 1285 #endif 1286 ]) 1287 1288 dnl provide memmove compat prototype. 1289 dnl $1: unique name for compat code 1290 AC_DEFUN([AHX_CONFIG_MEMMOVE], 1291 [ 1292 #ifndef HAVE_MEMMOVE 1293 #define memmove memmove_$1 1294 void *memmove(void *dest, const void *src, size_t n); 1295 #endif 1296 ]) 1297 1298 dnl provide strlcat compat prototype. 1299 dnl $1: unique name for compat code 1300 AC_DEFUN([AHX_CONFIG_STRLCAT], 1301 [ 1302 #ifndef HAVE_STRLCAT 1303 #define strlcat strlcat_$1 1304 size_t strlcat(char *dst, const char *src, size_t siz); 1305 #endif 1306 ]) 1307 1308 dnl provide strlcpy compat prototype. 1309 dnl $1: unique name for compat code 1310 AC_DEFUN([AHX_CONFIG_STRLCPY], 1311 [ 1312 #ifndef HAVE_STRLCPY 1313 #define strlcpy strlcpy_$1 1314 size_t strlcpy(char *dst, const char *src, size_t siz); 1315 #endif 1316 ]) 1317 1318 dnl provide gmtime_r compat prototype. 1319 dnl $1: unique name for compat code 1320 AC_DEFUN([AHX_CONFIG_GMTIME_R], 1321 [ 1322 #ifndef HAVE_GMTIME_R 1323 #define gmtime_r gmtime_r_$1 1324 struct tm *gmtime_r(const time_t *timep, struct tm *result); 1325 #endif 1326 ]) 1327 1328 dnl provide reallocarray compat prototype. 1329 dnl $1: unique name for compat code 1330 AC_DEFUN([AHX_CONFIG_REALLOCARRAY], 1331 [ 1332 #ifndef HAVE_REALLOCARRAY 1333 #define reallocarray reallocarray$1 1334 void* reallocarray(void *ptr, size_t nmemb, size_t size); 1335 #endif 1336 ]) 1337 1338 dnl provide w32 compat definition for sleep 1339 AC_DEFUN([AHX_CONFIG_W32_SLEEP], 1340 [ 1341 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H) 1342 #define sleep(x) Sleep((x)*1000) /* on win32 */ 1343 #endif /* HAVE_SLEEP */ 1344 ]) 1345 1346 dnl provide w32 compat definition for usleep 1347 AC_DEFUN([AHX_CONFIG_W32_USLEEP], 1348 [ 1349 #ifndef HAVE_USLEEP 1350 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */ 1351 #endif /* HAVE_USLEEP */ 1352 ]) 1353 1354 dnl provide w32 compat definition for random 1355 AC_DEFUN([AHX_CONFIG_W32_RANDOM], 1356 [ 1357 #ifndef HAVE_RANDOM 1358 #define random rand /* on win32, for tests only (bad random) */ 1359 #endif /* HAVE_RANDOM */ 1360 ]) 1361 1362 dnl provide w32 compat definition for srandom 1363 AC_DEFUN([AHX_CONFIG_W32_SRANDOM], 1364 [ 1365 #ifndef HAVE_SRANDOM 1366 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */ 1367 #endif /* HAVE_SRANDOM */ 1368 ]) 1369 1370 dnl provide w32 compat definition for FD_SET_T 1371 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T], 1372 [ 1373 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */ 1374 #ifdef HAVE_WINSOCK2_H 1375 #define FD_SET_T (u_int) 1376 #else 1377 #define FD_SET_T 1378 #endif 1379 ]) 1380 1381 dnl Remove an extension flag from CFLAGS, define replacement to be made. 1382 dnl Used by ACX_STRIP_EXT_FLAGS. 1383 dnl $1: the name of the flag, for example -D_GNU_SOURCE. 1384 AC_DEFUN([ACX_CFLAGS_STRIP], 1385 [ 1386 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then 1387 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`" 1388 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h) 1389 fi 1390 ]) 1391 1392 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h 1393 dnl use with ACX_DETERMINE_EXT_FLAGS. 1394 AC_DEFUN([ACX_STRIP_EXT_FLAGS], 1395 [ 1396 AC_MSG_NOTICE([Stripping extension flags...]) 1397 ACX_CFLAGS_STRIP(-D_GNU_SOURCE) 1398 ACX_CFLAGS_STRIP(-D_BSD_SOURCE) 1399 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE) 1400 ACX_CFLAGS_STRIP(-D__EXTENSIONS__) 1401 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112) 1402 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600) 1403 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1) 1404 ACX_CFLAGS_STRIP(-D_ALL_SOURCE) 1405 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1) 1406 ]) dnl End of ACX_STRIP_EXT_FLAGS 1407 1408 dnl define one omitted flag for config.h 1409 dnl $1: flag name. -D_GNU_SOURCE 1410 dnl $2: replacement define. _GNU_SOURCE 1411 dnl $3: define value, 1 1412 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED], 1413 [#if defined($1) && !defined($2) 1414 #define $2 $3 1415 [#]endif]) 1416 1417 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags 1418 dnl $1: the -DNAME or -DNAME=value string. 1419 AC_DEFUN([AHX_CONFIG_FLAG_EXT], 1420 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,))) 1421 ]) 1422 1423 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS. 1424 AC_DEFUN([AHX_CONFIG_EXT_FLAGS], 1425 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE) 1426 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE) 1427 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE) 1428 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__) 1429 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112) 1430 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600) 1431 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1) 1432 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE) 1433 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1) 1434 ]) 1435 1436 dnl check if memcmp is using signed characters and replace if so. 1437 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED], 1438 [AC_MSG_CHECKING([if memcmp compares unsigned]) 1439 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 1440 #include <stdio.h> 1441 #include <stdlib.h> 1442 #include <string.h> 1443 int main(void) 1444 { 1445 char a = 255, b = 0; 1446 if(memcmp(&a, &b, 1) < 0) 1447 return 1; 1448 return 0; 1449 } 1450 ]])], [AC_MSG_RESULT([yes]) ], 1451 [ AC_MSG_RESULT([no]) 1452 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes]) 1453 AC_LIBOBJ([memcmp]) 1454 ], [ AC_MSG_RESULT([cross-compile no]) 1455 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes]) 1456 AC_LIBOBJ([memcmp]) 1457 ]) ]) 1458 1459 dnl define memcmp to its replacement, pass unique id for program as arg 1460 AC_DEFUN([AHX_MEMCMP_BROKEN], [ 1461 #ifdef MEMCMP_IS_BROKEN 1462 #include "compat/memcmp.h" 1463 #define memcmp memcmp_$1 1464 int memcmp(const void *x, const void *y, size_t n); 1465 #endif 1466 ]) 1467 1468 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family 1469 AC_DEFUN([ACX_CHECK_SS_FAMILY], 1470 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [ 1471 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [ 1472 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage]) 1473 ],, [AC_INCLUDES_DEFAULT 1474 #ifdef HAVE_NETINET_IN_H 1475 #include <netinet/in.h> 1476 #endif 1477 #ifdef HAVE_SYS_SOCKET_H 1478 #include <sys/socket.h> 1479 #endif 1480 #ifdef HAVE_NETDB_H 1481 #include <netdb.h> 1482 #endif 1483 #ifdef HAVE_ARPA_INET_H 1484 #include <arpa/inet.h> 1485 #endif 1486 ]) 1487 ], [AC_INCLUDES_DEFAULT 1488 #ifdef HAVE_NETINET_IN_H 1489 #include <netinet/in.h> 1490 #endif 1491 #ifdef HAVE_SYS_SOCKET_H 1492 #include <sys/socket.h> 1493 #endif 1494 #ifdef HAVE_NETDB_H 1495 #include <netdb.h> 1496 #endif 1497 #ifdef HAVE_ARPA_INET_H 1498 #include <arpa/inet.h> 1499 #endif 1500 ]) ]) 1501 1502 dnl Check if CC and linker support -fPIE and -pie. 1503 dnl If so, sets them in CFLAGS / LDFLAGS. 1504 AC_DEFUN([ACX_CHECK_PIE], [ 1505 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)])) 1506 AS_IF([test "x$enable_pie" = "xyes"], [ 1507 AC_MSG_CHECKING([if $CC supports PIE]) 1508 BAKLDFLAGS="$LDFLAGS" 1509 BAKCFLAGS="$CFLAGS" 1510 LDFLAGS="$LDFLAGS -pie" 1511 CFLAGS="$CFLAGS -fPIE" 1512 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 1513 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then 1514 LDFLAGS="$BAKLDFLAGS" 1515 AC_MSG_RESULT(no) 1516 else 1517 AC_MSG_RESULT(yes) 1518 fi 1519 rm -f conftest conftest.c conftest.o 1520 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)]) 1521 ]) 1522 ]) 1523 1524 dnl Check if linker supports -Wl,-z,relro,-z,now. 1525 dnl If so, adds it to LDFLAGS. 1526 AC_DEFUN([ACX_CHECK_RELRO_NOW], [ 1527 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)])) 1528 AS_IF([test "x$enable_relro_now" = "xyes"], [ 1529 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now]) 1530 BAKLDFLAGS="$LDFLAGS" 1531 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now" 1532 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 1533 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then 1534 LDFLAGS="$BAKLDFLAGS" 1535 AC_MSG_RESULT(no) 1536 else 1537 AC_MSG_RESULT(yes) 1538 fi 1539 rm -f conftest conftest.c conftest.o 1540 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)]) 1541 ]) 1542 ]) 1543 1544 dnl End of file 1545
Indexes created Wed Mar 04 15:26:31 UTC 2026