1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
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.
57 # Automates some of the checking constructs. Aims at portability for POSIX.
58 # Documentation for functions is below.
60 # the following macro's are provided in this file:
61 # (see below for details on each macro).
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
122 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
123 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
124 dnl $1: the text to change.
126 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
129 dnl Calculate comma separated windows-resource numbers from package version.
130 dnl Picks the first three(,0) or four numbers out of the name.
131 dnl $1: variable for the result
132 AC_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/' `]
136 dnl Routine to help check for compiler flags.
137 dnl Checks if the compiler will accept the flag.
138 dnl $1: the flag without a - in front, so g to check -g.
139 dnl $2: executed if yes
140 dnl $3: executed if no
141 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
143 AC_REQUIRE([AC_PROG_CC])
144 AC_MSG_CHECKING(whether $CC supports -$1)
145 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
146 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
148 echo 'void f(void){}' >conftest.c
149 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
150 eval "cv_prog_cc_flag_$cache=yes"
152 eval "cv_prog_cc_flag_$cache=no"
154 rm -f conftest conftest.o conftest.c
156 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
167 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
168 dnl ERRFLAG: result, compiler flag to turn warnings into errors
169 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
171 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
172 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
173 [ERRFLAG="$ERRFLAG -errfmt"])
176 dnl Routine to help check for needed compiler flags.
178 dnl $2: the includes and code
179 dnl $3: if the given code only compiles with the flag, execute argument 3
180 dnl $4: if the given code compiles without the flag, execute argument 4
181 dnl $5: with and without flag the compile fails, execute argument 5.
182 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
184 AC_REQUIRE([AC_PROG_CC])
185 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
186 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
188 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
189 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
191 echo '$2' > conftest.c
192 echo 'void f(void){}' >>conftest.c
193 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
194 eval "cv_prog_cc_flag_needed_$cache=no"
197 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
198 eval "cv_prog_cc_flag_needed_$cache=yes"
200 eval "cv_prog_cc_flag_needed_$cache=fail"
201 #echo 'Test with flag fails too!'
203 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
204 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
209 rm -f conftest conftest.c conftest.o
211 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
216 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
218 #echo 'Test with flag is no!'
220 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
221 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
226 AC_MSG_RESULT(failed)
233 dnl Check for CC dependency flag
234 dnl DEPFLAG: set to flag that generates dependencies.
235 AC_DEFUN([ACX_DEPFLAG],
237 AC_MSG_CHECKING([$CC dependency flag])
238 echo 'void f(void){}' >conftest.c
239 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
242 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
245 DEPFLAG="-MM" # dunno do something
248 AC_MSG_RESULT($DEPFLAG)
253 dnl Determine flags that gives POSIX and BSD functionality.
254 dnl CFLAGS is modified for the result.
255 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
257 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
258 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
260 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
262 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE,
264 #include "confdefs.h"
267 #include <sys/time.h>
284 const char* str = NULL;
287 t = ctime_r(&time, buf);
290 a = getopt(2, opts, "a");
292 str = gai_strerror(0);
293 if(str && t && tv.tv_usec && msg.msg_control)
297 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
299 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
301 #include "confdefs.h"
304 #include <sys/time.h>
321 const char* str = NULL;
324 t = ctime_r(&time, buf);
327 a = getopt(2, opts, "a");
329 str = gai_strerror(0);
330 if(str && t && tv.tv_usec && msg.msg_control)
334 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
336 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
344 ], [CFLAGS="$CFLAGS $C99FLAG"])
346 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
355 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
357 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
359 #include <netinet/in.h>
362 struct in6_pktinfo inf;
363 int a = (int)sizeof(inf);
366 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
368 # check again for GNU_SOURCE for setresgid. May fail if setresgid
369 # is not available at all. -D_FRSRESGID is to make this check unique.
370 # otherwise we would get the previous cached result.
371 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
376 int a = setresgid(0,0,0);
377 a = setresuid(0,0,0);
380 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
382 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
384 #include "confdefs.h"
395 const char* str = NULL;
396 t = ctime_r(&time, buf);
397 str = gai_strerror(0);
402 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
404 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
406 #include "confdefs.h"
409 #include <sys/time.h>
424 a = getopt(2, opts, "a");
430 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
432 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
434 dnl Check if CC supports -flto.
435 dnl in a way that supports clang and suncc (that flag does something else,
436 dnl but fails to link). It sets it in CFLAGS if it works.
437 AC_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 $CC supports -flto])
442 CFLAGS="$CFLAGS -flto"
443 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
444 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
450 rm -f conftest conftest.c conftest.o
451 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
455 dnl Check the printf-format attribute (if any)
456 dnl result in HAVE_ATTR_FORMAT.
457 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
458 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
459 [AC_REQUIRE([AC_PROG_CC])
460 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
461 AC_CACHE_VAL(ac_cv_c_format_attribute,
462 [ac_cv_c_format_attribute=no
463 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
464 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
465 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
468 ]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"])
471 AC_MSG_RESULT($ac_cv_c_format_attribute)
472 if test $ac_cv_c_format_attribute = yes; then
473 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
475 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
477 dnl Setup ATTR_FORMAT config.h parts.
478 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
479 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
481 #ifdef HAVE_ATTR_FORMAT
482 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
483 __attribute__ ((format (archetype, string_index, first_to_check)))
484 #else /* !HAVE_ATTR_FORMAT */
485 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
486 #endif /* !HAVE_ATTR_FORMAT */
489 dnl Check how to mark function arguments as unused.
490 dnl result in HAVE_ATTR_UNUSED.
491 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
492 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
493 [AC_REQUIRE([AC_PROG_CC])
494 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
495 AC_CACHE_VAL(ac_cv_c_unused_attribute,
496 [ac_cv_c_unused_attribute=no
497 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
498 void f (char *u __attribute__((unused)));
501 ]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"])
504 dnl Setup ATTR_UNUSED config.h parts.
505 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
506 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
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 */
519 AC_MSG_RESULT($ac_cv_c_unused_attribute)
520 if test $ac_cv_c_unused_attribute = yes; then
521 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
525 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
526 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
527 # skip these tests, we do not need them.
528 AC_DEFUN([AC_PROG_F77], [:])
529 AC_DEFUN([AC_PROG_FC], [:])
530 AC_DEFUN([AC_PROG_CXX], [:])
531 AC_DEFUN([AC_PROG_CXXCPP], [:])
532 AC_DEFUN([AC_PROG_OBJC], [:])
533 AC_DEFUN([AC_PROG_OBJCCPP], [:])
534 AC_DEFUN([AC_LIBTOOL_CXX], [:])
535 AC_DEFUN([AC_LIBTOOL_F77], [:])
536 # always use ./libtool unless override from commandline (libtool=mylibtool)
537 if test -z "$libtool"; then
541 # avoid libtool max commandline length test on systems that fork slowly.
543 if echo "$host_os" | grep "sunos4" >/dev/null; then
544 lt_cv_sys_max_cmd_len=32750;
546 AC_PATH_TOOL(AR, ar, [false])
547 if test $AR = false; then
548 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
552 dnl Perform libtool check, portably, only for C
553 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
554 dnl as a requirement so that is gets called before LIBTOOL
555 dnl because libtools 'AC_REQUIRE' names are right after this one, before
556 dnl this function contents.
557 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
561 dnl Detect if u_char type is defined, otherwise define it.
562 AC_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])], [
566 #ifdef HAVE_WINSOCK2_H
567 # include <winsock2.h>
571 dnl Detect if rlim_t type is defined, otherwise define it.
572 AC_DEFUN([ACX_TYPE_RLIM_T],
573 [AC_CHECK_TYPE(rlim_t, ,
574 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
576 #ifdef HAVE_SYS_RESOURCE_H
577 # include <sys/resource.h>
581 dnl Detect if socklen_t type is defined, otherwise define it.
582 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
584 AC_CHECK_TYPE(socklen_t, ,
585 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
587 #ifdef HAVE_SYS_SOCKET_H
588 # include <sys/socket.h>
590 #ifdef HAVE_WS2TCPIP_H
591 # include <ws2tcpip.h>
595 dnl Detect if in_addr_t type is defined, otherwise define it.
596 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
597 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
599 #ifdef HAVE_SYS_TYPES_H
600 # include <sys/types.h>
602 #ifdef HAVE_NETINET_IN_H
603 # include <netinet/in.h>
607 dnl Detect if in_port_t type is defined, otherwise define it.
608 AC_DEFUN([ACX_TYPE_IN_PORT_T],
609 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
611 #ifdef HAVE_SYS_TYPES_H
612 # include <sys/types.h>
614 #ifdef HAVE_NETINET_IN_H
615 # include <netinet/in.h>
619 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
620 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
621 AC_DEFUN([ACX_ARG_RPATH],
624 [ --disable-rpath disable hardcoded rpath (default=enabled)],
625 enable_rpath=$enableval, enable_rpath=yes)
626 if 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__ "/'
638 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
639 dnl an absolute path.
640 dnl $1: the pathname to add.
641 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
642 if test "x$enable_rpath" = xyes; then
643 if echo "$1" | grep "^/" >/dev/null; then
644 RUNTIME_PATH="$RUNTIME_PATH -R$1"
649 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
650 dnl Takes one argument; the withval checked in those 2 functions
651 dnl sets up the environment for the given openssl path
652 AC_DEFUN([ACX_SSL_CHECKS], [
654 if test x_$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 "$withval/openssl/ssl.h"; then
665 ssldir_include="$ssldir"
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
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
675 AC_MSG_ERROR([Could not find openssl lib file, $ssldir_lib/libssl.[so,a], pass like "/usr/local" or "/usr/include/openssl11"])
680 if test x_$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"
683 for dir in $withval; do
685 if test -f "$dir/include/openssl/ssl.h"; then
687 ssldir_include="$ssldir/include"
688 if test ! -d "$ssldir/lib" -a -d "$ssldir/lib64"; then
689 ssldir_lib="$ssldir/lib64"
691 ssldir_lib="$ssldir/lib"
696 if test x_$found_ssl != x_yes; then
697 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
699 AC_MSG_RESULT(found in $ssldir)
700 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
702 dnl assume /usr is already in the include, lib and dynlib paths.
703 if test "$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([$ssldir_lib])
711 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto])
712 LIBS="$LIBS -lcrypto"
713 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
714 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
715 int EVP_sha256(void);
719 AC_DEFINE([HAVE_EVP_SHA256], 1,
720 [If you have EVP_sha256])
723 # check if -lwsock32 or -lgdi32 are needed.
725 BAKSSLLIBS="$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);
733 AC_DEFINE([HAVE_EVP_SHA256], 1,
734 [If you have EVP_sha256])
739 LIBSSL_LIBS="$BAKSSLLIBS"
741 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
742 AC_MSG_CHECKING([if -lcrypto needs -ldl])
743 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
744 int EVP_sha256(void);
747 AC_DEFINE([HAVE_EVP_SHA256], 1,
748 [If you have EVP_sha256])
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);
761 AC_DEFINE([HAVE_EVP_SHA256], 1,
762 [If you have EVP_sha256])
766 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
773 AC_SUBST(RUNTIME_PATH)
775 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
776 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
777 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
778 ])dnl End of ACX_SSL_CHECKS
780 dnl Check for SSL, where SSL is mandatory
781 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
782 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
783 dnl Checks main header files of SSL.
785 AC_DEFUN([ACX_WITH_SSL],
787 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
788 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[
792 if test x_$withval = x_no; then
793 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
795 ACX_SSL_CHECKS($withval)
796 ])dnl End of ACX_WITH_SSL
798 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
799 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
800 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
801 dnl Checks main header files of SSL.
803 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
805 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
806 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[
810 ACX_SSL_CHECKS($withval)
811 ])dnl End of ACX_WITH_SSL_OPTIONAL
813 dnl Setup to use -lssl
814 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
815 AC_DEFUN([ACX_LIB_SSL],
817 # check if libssl needs libdl
820 AC_MSG_CHECKING([if libssl needs libdl])
821 AC_TRY_LINK_FUNC([SSL_CTX_new], [
827 AC_SEARCH_LIBS([dlopen], [dl])
828 ]) ])dnl End of ACX_LIB_SSL
830 dnl Setup to use very large files (>2Gb).
831 dnl setups fseeko and its own
832 AC_DEFUN([ACX_SYS_LARGEFILE],
835 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
836 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
840 int a = fseeko(stdin, 0, 0);
843 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
846 dnl Check getaddrinfo.
847 dnl Works on linux, solaris, bsd and windows(links winsock).
848 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
849 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
850 [AC_REQUIRE([AC_PROG_CC])
851 AC_MSG_CHECKING(for getaddrinfo)
852 ac_cv_func_getaddrinfo=no
860 char* (*f) () = getaddrinfo;
869 dnl this case on linux, solaris, bsd
870 [ac_cv_func_getaddrinfo="yes"
871 dnl see if on windows
872 if test "$ac_cv_header_windows_h" = "yes"; then
873 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
875 if echo $LIBS | grep 'lws2_32' >/dev/null; then
878 LIBS="$LIBS -lws2_32"
882 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
884 LIBS="$LIBS -lws2_32"
888 #ifdef HAVE_WS2TCPIP_H
889 #include <ws2tcpip.h>
893 (void)getaddrinfo(NULL, NULL, NULL, NULL);
897 ac_cv_func_getaddrinfo="yes"
898 dnl already: LIBS="$LIBS -lws2_32"
899 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
903 ac_cv_func_getaddrinfo="no"
908 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
909 if test $ac_cv_func_getaddrinfo = yes; then
910 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
912 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
914 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
915 dnl $1: function name
916 dnl $2: C-statement that calls the function.
917 dnl $3: includes for the program.
918 dnl $4: executes if yes
919 dnl $5: executes if no
920 AC_DEFUN([ACX_FUNC_DEPRECATED],
922 AC_REQUIRE([AC_PROG_CC])
923 AC_MSG_CHECKING(if $1 is deprecated)
924 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
925 AC_CACHE_VAL(cv_cc_deprecated_$cache,
927 echo '$3' >conftest.c
928 echo 'void f(void){ $2 }' >>conftest.c
929 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
930 eval "cv_cc_deprecated_$cache=no"
932 eval "cv_cc_deprecated_$cache=yes"
934 rm -f conftest conftest.o conftest.c
936 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
938 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
946 ])dnl end of ACX_FUNC_DEPRECATED
948 dnl check if select and nonblocking sockets actually work.
949 dnl Needs fork(2) and select(2).
950 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
951 dnl a nonblocking socket do not work, a new call to select is necessary.
952 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
954 AC_MSG_CHECKING([if nonblocking sockets work])
955 if 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).])
966 #ifdef HAVE_SYS_TYPES_H
967 #include <sys/types.h>
969 #ifdef HAVE_SYS_SELECT_H
970 #include <sys/select.h>
972 #ifdef HAVE_SYS_SOCKET_H
973 #include <sys/socket.h>
975 #ifdef HAVE_NETINET_IN_H
976 #include <netinet/in.h>
978 #ifdef HAVE_ARPA_INET_H
979 #include <arpa/inet.h>
994 struct sockaddr_in a;
995 /* test if select and nonblocking reads work well together */
997 fork child to send 10 messages.
999 then try to nonblocking read the 10 messages
1000 then, nonblocking read must give EAGAIN
1003 port = 12345 + (time(0)%32);
1004 sfd = socket(PF_INET, SOCK_DGRAM, 0);
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) {
1017 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
1022 cfd = socket(PF_INET, SOCK_DGRAM, 0);
1024 perror("client socket");
1028 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
1029 perror("client bind");
1032 a.sin_port = htons(port);
1034 /* no handler, causes exit in 10 seconds */
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) {
1056 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1062 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1070 /* now we want to get EAGAIN: nonblocking goodness */
1072 recv(sfd, &x, sizeof(x), 0);
1073 if(errno != EAGAIN) {
1074 perror("trying to recv again");
1077 /* EAGAIN encountered */
1085 AC_MSG_RESULT([yes])
1088 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1090 AC_MSG_RESULT([crosscompile(yes)])
1093 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1095 dnl Check if mkdir has one or two arguments.
1096 dnl defines MKDIR_HAS_ONE_ARG
1097 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1099 AC_MSG_CHECKING([whether mkdir has one arg])
1100 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1103 #ifdef HAVE_WINSOCK2_H
1104 #include <winsock2.h>
1106 #ifdef HAVE_SYS_STAT_H
1107 #include <sys/stat.h>
1110 (void)mkdir("directory");
1111 ]])],[AC_MSG_RESULT(yes)
1112 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1113 ],[AC_MSG_RESULT(no)
1115 ])dnl end of ACX_MKDIR_ONE_ARG
1117 dnl Check for ioctlsocket function. works on mingw32 too.
1118 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1121 AC_MSG_CHECKING(for ioctlsocket)
1122 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1123 #ifdef HAVE_WINSOCK2_H
1124 #include <winsock2.h>
1127 (void)ioctlsocket(0, 0, NULL);
1130 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1131 ],[AC_MSG_RESULT(no)])
1132 ])dnl end of ACX_FUNC_IOCTLSOCKET
1134 dnl detect malloc and provide malloc compat prototype.
1135 dnl $1: unique name for compat code
1136 AC_DEFUN([ACX_FUNC_MALLOC],
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
1145 ]], [ if(malloc(0) != 0) return 1;])
1147 [AC_MSG_RESULT([no])
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)])
1154 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1157 dnl Define fallback for fseeko and ftello if needed.
1158 AC_DEFUN([AHX_CONFIG_FSEEKO],
1161 #define fseeko fseek
1162 #define ftello ftell
1163 #endif /* HAVE_FSEEKO */
1166 dnl Define RAND_MAX if not defined
1167 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1170 #define RAND_MAX 2147483647
1174 dnl Define MAXHOSTNAMELEN if not defined
1175 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1177 #ifndef MAXHOSTNAMELEN
1178 #define MAXHOSTNAMELEN 256
1182 dnl Define IPV6_MIN_MTU if not defined
1183 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1185 #ifndef IPV6_MIN_MTU
1186 #define IPV6_MIN_MTU 1280
1187 #endif /* IPV6_MIN_MTU */
1190 dnl provide snprintf, vsnprintf compat prototype
1191 dnl $1: unique name for compat code
1192 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1194 #ifndef HAVE_SNPRINTF
1195 #define snprintf snprintf_$1
1196 #define vsnprintf vsnprintf_$1
1198 int snprintf (char *str, size_t count, const char *fmt, ...);
1199 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1200 #endif /* HAVE_SNPRINTF */
1203 dnl provide inet_pton compat prototype.
1204 dnl $1: unique name for compat code
1205 AC_DEFUN([AHX_CONFIG_INET_PTON],
1207 #ifndef HAVE_INET_PTON
1208 #define inet_pton inet_pton_$1
1209 int inet_pton(int af, const char* src, void* dst);
1210 #endif /* HAVE_INET_PTON */
1213 dnl provide inet_ntop compat prototype.
1214 dnl $1: unique name for compat code
1215 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1217 #ifndef HAVE_INET_NTOP
1218 #define inet_ntop inet_ntop_$1
1219 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1223 dnl provide inet_aton compat prototype.
1224 dnl $1: unique name for compat code
1225 AC_DEFUN([AHX_CONFIG_INET_ATON],
1227 #ifndef HAVE_INET_ATON
1228 #define inet_aton inet_aton_$1
1229 int inet_aton(const char *cp, struct in_addr *addr);
1233 dnl provide memmove compat prototype.
1234 dnl $1: unique name for compat code
1235 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1237 #ifndef HAVE_MEMMOVE
1238 #define memmove memmove_$1
1239 void *memmove(void *dest, const void *src, size_t n);
1243 dnl provide strlcat compat prototype.
1244 dnl $1: unique name for compat code
1245 AC_DEFUN([AHX_CONFIG_STRLCAT],
1247 #ifndef HAVE_STRLCAT
1248 #define strlcat strlcat_$1
1249 size_t strlcat(char *dst, const char *src, size_t siz);
1253 dnl provide strlcpy compat prototype.
1254 dnl $1: unique name for compat code
1255 AC_DEFUN([AHX_CONFIG_STRLCPY],
1257 #ifndef HAVE_STRLCPY
1258 #define strlcpy strlcpy_$1
1259 size_t strlcpy(char *dst, const char *src, size_t siz);
1263 dnl provide gmtime_r compat prototype.
1264 dnl $1: unique name for compat code
1265 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1267 #ifndef HAVE_GMTIME_R
1268 #define gmtime_r gmtime_r_$1
1269 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1273 dnl provide reallocarray compat prototype.
1274 dnl $1: unique name for compat code
1275 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1277 #ifndef HAVE_REALLOCARRAY
1278 #define reallocarray reallocarray$1
1279 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1283 dnl provide w32 compat definition for sleep
1284 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1286 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1287 #define sleep(x) Sleep((x)*1000) /* on win32 */
1288 #endif /* HAVE_SLEEP */
1291 dnl provide w32 compat definition for usleep
1292 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1295 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1296 #endif /* HAVE_USLEEP */
1299 dnl provide w32 compat definition for random
1300 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1303 #define random rand /* on win32, for tests only (bad random) */
1304 #endif /* HAVE_RANDOM */
1307 dnl provide w32 compat definition for srandom
1308 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1310 #ifndef HAVE_SRANDOM
1311 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1312 #endif /* HAVE_SRANDOM */
1315 dnl provide w32 compat definition for FD_SET_T
1316 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
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)
1326 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1327 dnl Used by ACX_STRIP_EXT_FLAGS.
1328 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1329 AC_DEFUN([ACX_CFLAGS_STRIP],
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)
1337 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1338 dnl use with ACX_DETERMINE_EXT_FLAGS.
1339 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
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
1353 dnl define one omitted flag for config.h
1354 dnl $1: flag name. -D_GNU_SOURCE
1355 dnl $2: replacement define. _GNU_SOURCE
1356 dnl $3: define value, 1
1357 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1358 [#if defined($1) && !defined($2)
1362 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1363 dnl $1: the -DNAME or -DNAME=value string.
1364 AC_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,^.*=,)))
1368 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1369 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1370 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1371 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1372 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
1373 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1374 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1375 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1376 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1377 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1378 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1381 dnl check if memcmp is using signed characters and replace if so.
1382 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1383 [AC_MSG_CHECKING([if memcmp compares unsigned])
1384 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1390 char a = 255, b = 0;
1391 if(memcmp(&a, &b, 1) < 0)
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])
1399 ], [ AC_MSG_RESULT([cross-compile no])
1400 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1404 dnl define memcmp to its replacement, pass unique id for program as arg
1405 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1406 #ifdef MEMCMP_IS_BROKEN
1407 #include "compat/memcmp.h"
1408 #define memcmp memcmp_$1
1409 int memcmp(const void *x, const void *y, size_t n);
1413 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1414 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1415 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1416 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1417 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1418 ],, [AC_INCLUDES_DEFAULT
1419 #ifdef HAVE_NETINET_IN_H
1420 #include <netinet/in.h>
1422 #ifdef HAVE_SYS_SOCKET_H
1423 #include <sys/socket.h>
1428 #ifdef HAVE_ARPA_INET_H
1429 #include <arpa/inet.h>
1432 ], [AC_INCLUDES_DEFAULT
1433 #ifdef HAVE_NETINET_IN_H
1434 #include <netinet/in.h>
1436 #ifdef HAVE_SYS_SOCKET_H
1437 #include <sys/socket.h>
1442 #ifdef HAVE_ARPA_INET_H
1443 #include <arpa/inet.h>
1447 dnl Check if CC and linker support -fPIE and -pie.
1448 dnl If so, sets them in CFLAGS / LDFLAGS.
1449 AC_DEFUN([ACX_CHECK_PIE], [
1450 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1451 AS_IF([test "x$enable_pie" = "xyes"], [
1452 AC_MSG_CHECKING([if $CC supports PIE])
1453 BAKLDFLAGS="$LDFLAGS"
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"
1464 rm -f conftest conftest.c conftest.o
1465 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1469 dnl Check if linker supports -Wl,-z,relro,-z,now.
1470 dnl If so, adds it to LDFLAGS.
1471 AC_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"
1484 rm -f conftest conftest.c conftest.o
1485 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])