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