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