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