1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2021-07-30 fix for openssl use of lib64 directory.
7 # 2021-06-14 fix nonblocking test to use host instead of target for mingw test.
8 # 2021-05-17 fix nonblocking socket test from grep on mingw32 to mingw for
10 # 2021-03-24 fix ACX_FUNC_DEPRECATED to use CPPFLAGS and CFLAGS.
11 # 2021-01-05 fix defun for aclocal
12 # 2021-01-05 autoconf 2.70 autoupdate and fixes, no AC_TRY_COMPILE
13 # 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0).
14 # 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0.
15 # 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0).
16 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
17 # 2015-12-11 FLTO check for new OSX, clang.
18 # 2015-11-18 spelling check fix.
19 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
20 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
21 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
22 # 2013-09-19 FLTO help text improved.
23 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
24 # 2013-06-25 FLTO has --disable-flto option.
25 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
26 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
27 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
28 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
29 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
30 # Fix ACX_MALLOC for redefined malloc error.
31 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
32 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
33 # 2011-11-01 Fix FLTO test for llvm on Lion.
34 # 2011-08-01 Fix nonblock test (broken at v13).
35 # 2011-08-01 Fix autoconf 2.68 warnings
36 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
37 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
38 # 2010-07-02 Add check for ss_family (for minix).
39 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
40 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
41 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
42 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
43 # 2010-01-20 added AHX_COONFIG_STRLCAT
44 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
45 # added ACX_FUNC_MALLOC
46 # fixup some #if to #ifdef
47 # NONBLOCKING test for mingw crosscompile.
48 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
49 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
51 # Automates some of the checking constructs. Aims at portability for POSIX.
52 # Documentation for functions is below.
54 # the following macro's are provided in this file:
55 # (see below for details on each macro).
57 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
58 # ACX_RSRC_VERSION - create windows resource version number.
59 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
60 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
61 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
62 # ACX_DEPFLAG - find cc dependency flags.
63 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
64 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
65 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
66 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
67 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
68 # ACX_TYPE_U_CHAR - u_char type.
69 # ACX_TYPE_RLIM_T - rlim_t type.
70 # ACX_TYPE_SOCKLEN_T - socklen_t type.
71 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
72 # ACX_TYPE_IN_PORT_T - in_port_t type.
73 # ACX_ARG_RPATH - add --disable-rpath option.
74 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
75 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
76 # where --without-ssl is also accepted
77 # ACX_LIB_SSL - setup to link -lssl.
78 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
79 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
80 # ACX_FUNC_DEPRECATED - see if func is deprecated.
81 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
82 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
83 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
84 # ACX_FUNC_MALLOC - check malloc, define replacement .
85 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
86 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
87 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
88 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
89 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
90 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
91 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
92 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
93 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
94 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
95 # AHX_CONFIG_MEMMOVE - memmove compat prototype
96 # AHX_CONFIG_STRLCAT - strlcat compat prototype
97 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
98 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
99 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
100 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
101 # AHX_CONFIG_W32_RANDOM - w32 compat for random
102 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
103 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
104 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
105 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
106 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
107 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
108 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
109 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
110 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
111 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
112 # ACX_CHECK_PIE - add --enable-pie option and check if works
113 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
116 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
117 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
118 dnl $1: the text to change.
120 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
123 dnl Calculate comma separated windows-resource numbers from package version.
124 dnl Picks the first three(,0) or four numbers out of the name.
125 dnl $1: variable for the result
126 AC_DEFUN([ACX_RSRC_VERSION],
127 [$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/' `]
130 dnl Routine to help check for compiler flags.
131 dnl Checks if the compiler will accept the flag.
132 dnl $1: the flag without a - in front, so g to check -g.
133 dnl $2: executed if yes
134 dnl $3: executed if no
135 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
137 AC_REQUIRE([AC_PROG_CC])
138 AC_MSG_CHECKING(whether $CC supports -$1)
139 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
140 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
142 echo 'void f(void){}' >conftest.c
143 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
144 eval "cv_prog_cc_flag_$cache=yes"
146 eval "cv_prog_cc_flag_$cache=no"
148 rm -f conftest conftest.o conftest.c
150 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
161 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
162 dnl ERRFLAG: result, compiler flag to turn warnings into errors
163 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
165 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
166 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
167 [ERRFLAG="$ERRFLAG -errfmt"])
170 dnl Routine to help check for needed compiler flags.
172 dnl $2: the includes and code
173 dnl $3: if the given code only compiles with the flag, execute argument 3
174 dnl $4: if the given code compiles without the flag, execute argument 4
175 dnl $5: with and without flag the compile fails, execute argument 5.
176 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
178 AC_REQUIRE([AC_PROG_CC])
179 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
180 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
182 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
183 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
185 echo '$2' > conftest.c
186 echo 'void f(){}' >>conftest.c
187 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
188 eval "cv_prog_cc_flag_needed_$cache=no"
191 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
192 eval "cv_prog_cc_flag_needed_$cache=yes"
194 eval "cv_prog_cc_flag_needed_$cache=fail"
195 #echo 'Test with flag fails too!'
197 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
198 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
203 rm -f conftest conftest.c conftest.o
205 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
210 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
212 #echo 'Test with flag is no!'
214 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
215 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
220 AC_MSG_RESULT(failed)
227 dnl Check for CC dependency flag
228 dnl DEPFLAG: set to flag that generates dependencies.
229 AC_DEFUN([ACX_DEPFLAG],
231 AC_MSG_CHECKING([$CC dependency flag])
232 echo 'void f(){}' >conftest.c
233 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
236 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
239 DEPFLAG="-MM" # dunno do something
242 AC_MSG_RESULT($DEPFLAG)
247 dnl Determine flags that gives POSIX and BSD functionality.
248 dnl CFLAGS is modified for the result.
249 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
251 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
252 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
254 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
256 ACX_CHECK_COMPILER_FLAG_NEEDED($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,
258 #include "confdefs.h"
261 #include <sys/time.h>
278 const char* str = NULL;
281 t = ctime_r(&time, buf);
284 a = getopt(2, opts, "a");
286 str = gai_strerror(0);
287 if(str && t && tv.tv_usec && msg.msg_control)
291 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
293 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
295 #include "confdefs.h"
298 #include <sys/time.h>
315 const char* str = NULL;
318 t = ctime_r(&time, buf);
321 a = getopt(2, opts, "a");
323 str = gai_strerror(0);
324 if(str && t && tv.tv_usec && msg.msg_control)
328 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
330 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
338 ], [CFLAGS="$CFLAGS $C99FLAG"])
340 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
349 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
351 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
353 #include <netinet/in.h>
356 struct in6_pktinfo inf;
357 int a = (int)sizeof(inf);
360 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
362 # check again for GNU_SOURCE for setresgid. May fail if setresgid
363 # is not available at all. -D_FRSRESGID is to make this check unique.
364 # otherwise we would get the previous cached result.
365 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
370 int a = setresgid(0,0,0);
371 a = setresuid(0,0,0);
374 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
376 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
378 #include "confdefs.h"
389 const char* str = NULL;
390 t = ctime_r(&time, buf);
391 str = gai_strerror(0);
396 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
398 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
400 #include "confdefs.h"
403 #include <sys/time.h>
418 a = getopt(2, opts, "a");
424 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
426 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
428 dnl Check if CC supports -flto.
429 dnl in a way that supports clang and suncc (that flag does something else,
430 dnl but fails to link). It sets it in CFLAGS if it works.
431 AC_DEFUN([ACX_CHECK_FLTO], [
432 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
433 AS_IF([test "x$enable_flto" != "xno"], [
434 AC_MSG_CHECKING([if $CC supports -flto])
436 CFLAGS="$CFLAGS -flto"
437 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
438 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
444 rm -f conftest conftest.c conftest.o
445 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
449 dnl Check the printf-format attribute (if any)
450 dnl result in HAVE_ATTR_FORMAT.
451 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
452 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
453 [AC_REQUIRE([AC_PROG_CC])
454 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
455 AC_CACHE_VAL(ac_cv_c_format_attribute,
456 [ac_cv_c_format_attribute=no
457 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
458 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
459 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
462 ]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"])
465 AC_MSG_RESULT($ac_cv_c_format_attribute)
466 if test $ac_cv_c_format_attribute = yes; then
467 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
469 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
471 dnl Setup ATTR_FORMAT config.h parts.
472 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
473 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
475 #ifdef HAVE_ATTR_FORMAT
476 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
477 __attribute__ ((format (archetype, string_index, first_to_check)))
478 #else /* !HAVE_ATTR_FORMAT */
479 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
480 #endif /* !HAVE_ATTR_FORMAT */
483 dnl Check how to mark function arguments as unused.
484 dnl result in HAVE_ATTR_UNUSED.
485 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
486 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
487 [AC_REQUIRE([AC_PROG_CC])
488 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
489 AC_CACHE_VAL(ac_cv_c_unused_attribute,
490 [ac_cv_c_unused_attribute=no
491 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
492 void f (char *u __attribute__((unused)));
495 ]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"])
498 dnl Setup ATTR_UNUSED config.h parts.
499 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
500 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
503 # define ATTR_UNUSED(x) x
504 #elif defined(__cplusplus)
505 # define ATTR_UNUSED(x)
506 #elif defined(HAVE_ATTR_UNUSED)
507 # define ATTR_UNUSED(x) x __attribute__((unused))
508 #else /* !HAVE_ATTR_UNUSED */
509 # define ATTR_UNUSED(x) x
510 #endif /* !HAVE_ATTR_UNUSED */
513 AC_MSG_RESULT($ac_cv_c_unused_attribute)
514 if test $ac_cv_c_unused_attribute = yes; then
515 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
519 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
520 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
521 # skip these tests, we do not need them.
522 AC_DEFUN([AC_PROG_F77], [:])
523 AC_DEFUN([AC_PROG_FC], [:])
524 AC_DEFUN([AC_PROG_CXX], [:])
525 AC_DEFUN([AC_PROG_CXXCPP], [:])
526 AC_DEFUN([AC_PROG_OBJC], [:])
527 AC_DEFUN([AC_PROG_OBJCCPP], [:])
528 AC_DEFUN([AC_LIBTOOL_CXX], [:])
529 AC_DEFUN([AC_LIBTOOL_F77], [:])
530 # always use ./libtool unless override from commandline (libtool=mylibtool)
531 if test -z "$libtool"; then
535 # avoid libtool max commandline length test on systems that fork slowly.
537 if echo "$host_os" | grep "sunos4" >/dev/null; then
538 lt_cv_sys_max_cmd_len=32750;
540 AC_PATH_TOOL(AR, ar, [false])
541 if test $AR = false; then
542 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
546 dnl Perform libtool check, portably, only for C
547 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
548 dnl as a requirement so that is gets called before LIBTOOL
549 dnl because libtools 'AC_REQUIRE' names are right after this one, before
550 dnl this function contents.
551 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
555 dnl Detect if u_char type is defined, otherwise define it.
556 AC_DEFUN([ACX_TYPE_U_CHAR],
557 [AC_CHECK_TYPE([u_char], ,
558 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
560 #ifdef HAVE_WINSOCK2_H
561 # include <winsock2.h>
565 dnl Detect if rlim_t type is defined, otherwise define it.
566 AC_DEFUN([ACX_TYPE_RLIM_T],
567 [AC_CHECK_TYPE(rlim_t, ,
568 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
570 #ifdef HAVE_SYS_RESOURCE_H
571 # include <sys/resource.h>
575 dnl Detect if socklen_t type is defined, otherwise define it.
576 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
578 AC_CHECK_TYPE(socklen_t, ,
579 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
581 #ifdef HAVE_SYS_SOCKET_H
582 # include <sys/socket.h>
584 #ifdef HAVE_WS2TCPIP_H
585 # include <ws2tcpip.h>
589 dnl Detect if in_addr_t type is defined, otherwise define it.
590 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
591 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
593 #ifdef HAVE_SYS_TYPES_H
594 # include <sys/types.h>
596 #ifdef HAVE_NETINET_IN_H
597 # include <netinet/in.h>
601 dnl Detect if in_port_t type is defined, otherwise define it.
602 AC_DEFUN([ACX_TYPE_IN_PORT_T],
603 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
605 #ifdef HAVE_SYS_TYPES_H
606 # include <sys/types.h>
608 #ifdef HAVE_NETINET_IN_H
609 # include <netinet/in.h>
613 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
614 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
615 AC_DEFUN([ACX_ARG_RPATH],
618 [ --disable-rpath disable hardcoded rpath (default=enabled)],
619 enable_rpath=$enableval, enable_rpath=yes)
620 if test "x$enable_rpath" = xno; then
621 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
622 AC_CONFIG_COMMANDS([disable-rpath], [
623 sed < libtool > libtool-2 \
624 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
632 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
633 dnl an absolute path.
634 dnl $1: the pathname to add.
635 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
636 if test "x$enable_rpath" = xyes; then
637 if echo "$1" | grep "^/" >/dev/null; then
638 RUNTIME_PATH="$RUNTIME_PATH -R$1"
643 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
644 dnl Takes one argument; the withval checked in those 2 functions
645 dnl sets up the environment for the given openssl path
646 AC_DEFUN([ACX_SSL_CHECKS], [
648 if test x_$withval != x_no; then
649 AC_MSG_CHECKING(for SSL)
650 if test x_$withval = x_ -o x_$withval = x_yes; then
651 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
653 for dir in $withval; do
655 if test -f "$dir/include/openssl/ssl.h"; then
657 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
658 dnl assume /usr/include is already in the include-path.
659 if test "$ssldir" != "/usr"; then
660 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
661 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
666 if test x_$found_ssl != x_yes; then
667 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
669 AC_MSG_RESULT(found in $ssldir)
671 dnl assume /usr is already in the lib and dynlib paths.
672 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
673 if test ! -d "$ssldir/lib" -a -d "$ssldir/lib64"; then
674 LDFLAGS="$LDFLAGS -L$ssldir/lib64"
675 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib64"
676 ACX_RUNTIME_PATH_ADD([$ssldir/lib64])
678 LDFLAGS="$LDFLAGS -L$ssldir/lib"
679 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
680 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
684 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto])
685 LIBS="$LIBS -lcrypto"
686 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
687 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
688 int EVP_sha256(void);
692 AC_DEFINE([HAVE_EVP_SHA256], 1,
693 [If you have EVP_sha256])
696 # check if -lwsock32 or -lgdi32 are needed.
698 BAKSSLLIBS="$LIBSSL_LIBS"
699 LIBS="$LIBS -lgdi32 -lws2_32"
700 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32"
701 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
702 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
703 int EVP_sha256(void);
706 AC_DEFINE([HAVE_EVP_SHA256], 1,
707 [If you have EVP_sha256])
712 LIBSSL_LIBS="$BAKSSLLIBS"
714 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
715 AC_MSG_CHECKING([if -lcrypto needs -ldl])
716 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
717 int EVP_sha256(void);
720 AC_DEFINE([HAVE_EVP_SHA256], 1,
721 [If you have EVP_sha256])
726 LIBSSL_LIBS="$BAKSSLLIBS"
727 LIBS="$LIBS -ldl -pthread"
728 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
729 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread])
730 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
731 int EVP_sha256(void);
734 AC_DEFINE([HAVE_EVP_SHA256], 1,
735 [If you have EVP_sha256])
739 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
746 AC_SUBST(RUNTIME_PATH)
748 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
749 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
750 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
751 ])dnl End of ACX_SSL_CHECKS
753 dnl Check for SSL, where SSL is mandatory
754 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
755 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
756 dnl Checks main header files of SSL.
758 AC_DEFUN([ACX_WITH_SSL],
760 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
761 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
765 if test x_$withval = x_no; then
766 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
768 ACX_SSL_CHECKS($withval)
769 ])dnl End of ACX_WITH_SSL
771 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
772 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
773 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
774 dnl Checks main header files of SSL.
776 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
778 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
779 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
783 ACX_SSL_CHECKS($withval)
784 ])dnl End of ACX_WITH_SSL_OPTIONAL
786 dnl Setup to use -lssl
787 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
788 AC_DEFUN([ACX_LIB_SSL],
790 # check if libssl needs libdl
793 AC_MSG_CHECKING([if libssl needs libdl])
794 AC_TRY_LINK_FUNC([SSL_CTX_new], [
800 AC_SEARCH_LIBS([dlopen], [dl])
801 ]) ])dnl End of ACX_LIB_SSL
803 dnl Setup to use very large files (>2Gb).
804 dnl setups fseeko and its own
805 AC_DEFUN([ACX_SYS_LARGEFILE],
808 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
809 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
813 int a = fseeko(stdin, 0, 0);
816 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
819 dnl Check getaddrinfo.
820 dnl Works on linux, solaris, bsd and windows(links winsock).
821 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
822 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
823 [AC_REQUIRE([AC_PROG_CC])
824 AC_MSG_CHECKING(for getaddrinfo)
825 ac_cv_func_getaddrinfo=no
833 char* (*f) () = getaddrinfo;
842 dnl this case on linux, solaris, bsd
843 [ac_cv_func_getaddrinfo="yes"
844 dnl see if on windows
845 if test "$ac_cv_header_windows_h" = "yes"; then
846 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
848 if echo $LIBS | grep 'lws2_32' >/dev/null; then
851 LIBS="$LIBS -lws2_32"
855 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
857 LIBS="$LIBS -lws2_32"
861 #ifdef HAVE_WS2TCPIP_H
862 #include <ws2tcpip.h>
866 (void)getaddrinfo(NULL, NULL, NULL, NULL);
870 ac_cv_func_getaddrinfo="yes"
871 dnl already: LIBS="$LIBS -lws2_32"
872 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
876 ac_cv_func_getaddrinfo="no"
881 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
882 if test $ac_cv_func_getaddrinfo = yes; then
883 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
885 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
887 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
888 dnl $1: function name
889 dnl $2: C-statement that calls the function.
890 dnl $3: includes for the program.
891 dnl $4: executes if yes
892 dnl $5: executes if no
893 AC_DEFUN([ACX_FUNC_DEPRECATED],
895 AC_REQUIRE([AC_PROG_CC])
896 AC_MSG_CHECKING(if $1 is deprecated)
897 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
898 AC_CACHE_VAL(cv_cc_deprecated_$cache,
900 echo '$3' >conftest.c
901 echo 'void f(){ $2 }' >>conftest.c
902 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
903 eval "cv_cc_deprecated_$cache=no"
905 eval "cv_cc_deprecated_$cache=yes"
907 rm -f conftest conftest.o conftest.c
909 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
911 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
919 ])dnl end of ACX_FUNC_DEPRECATED
921 dnl check if select and nonblocking sockets actually work.
922 dnl Needs fork(2) and select(2).
923 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
924 dnl a nonblocking socket do not work, a new call to select is necessary.
925 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
927 AC_MSG_CHECKING([if nonblocking sockets work])
928 if echo $host | grep mingw >/dev/null; then
929 AC_MSG_RESULT([no (windows)])
930 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
939 #ifdef HAVE_SYS_TYPES_H
940 #include <sys/types.h>
942 #ifdef HAVE_SYS_SOCKET_H
943 #include <sys/socket.h>
945 #ifdef HAVE_NETINET_IN_H
946 #include <netinet/in.h>
948 #ifdef HAVE_ARPA_INET_H
949 #include <arpa/inet.h>
964 struct sockaddr_in a;
965 /* test if select and nonblocking reads work well together */
967 fork child to send 10 messages.
969 then try to nonblocking read the 10 messages
970 then, nonblocking read must give EAGAIN
973 port = 12345 + (time(0)%32);
974 sfd = socket(PF_INET, SOCK_DGRAM, 0);
979 memset(&a, 0, sizeof(a));
980 a.sin_family = AF_INET;
981 a.sin_port = htons(port);
982 a.sin_addr.s_addr = inet_addr("127.0.0.1");
983 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
987 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
992 cfd = socket(PF_INET, SOCK_DGRAM, 0);
994 perror("client socket");
998 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
999 perror("client bind");
1002 a.sin_port = htons(port);
1004 /* no handler, causes exit in 10 seconds */
1007 /* send and receive on the socket */
1008 if((p=fork()) == 0) {
1009 for(i=0; i<num; i++) {
1010 if(sendto(cfd, &i, sizeof(i), 0,
1011 (struct sockaddr*)&a, sizeof(a)) < 0) {
1026 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1032 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1040 /* now we want to get EAGAIN: nonblocking goodness */
1042 recv(sfd, &x, sizeof(x), 0);
1043 if(errno != EAGAIN) {
1044 perror("trying to recv again");
1047 /* EAGAIN encountered */
1055 AC_MSG_RESULT([yes])
1058 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1060 AC_MSG_RESULT([crosscompile(yes)])
1063 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1065 dnl Check if mkdir has one or two arguments.
1066 dnl defines MKDIR_HAS_ONE_ARG
1067 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1069 AC_MSG_CHECKING([whether mkdir has one arg])
1070 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1073 #ifdef HAVE_WINSOCK2_H
1074 #include <winsock2.h>
1076 #ifdef HAVE_SYS_STAT_H
1077 #include <sys/stat.h>
1080 (void)mkdir("directory");
1081 ]])],[AC_MSG_RESULT(yes)
1082 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1083 ],[AC_MSG_RESULT(no)
1085 ])dnl end of ACX_MKDIR_ONE_ARG
1087 dnl Check for ioctlsocket function. works on mingw32 too.
1088 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1091 AC_MSG_CHECKING(for ioctlsocket)
1092 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1093 #ifdef HAVE_WINSOCK2_H
1094 #include <winsock2.h>
1097 (void)ioctlsocket(0, 0, NULL);
1100 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1101 ],[AC_MSG_RESULT(no)])
1102 ])dnl end of ACX_FUNC_IOCTLSOCKET
1104 dnl detect malloc and provide malloc compat prototype.
1105 dnl $1: unique name for compat code
1106 AC_DEFUN([ACX_FUNC_MALLOC],
1108 AC_MSG_CHECKING([for GNU libc compatible malloc])
1109 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1110 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1115 ]], [ if(malloc(0) != 0) return 1;])
1117 [AC_MSG_RESULT([no])
1119 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1120 [AC_MSG_RESULT([yes])
1121 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1122 [AC_MSG_RESULT([no (crosscompile)])
1124 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1127 dnl Define fallback for fseeko and ftello if needed.
1128 AC_DEFUN([AHX_CONFIG_FSEEKO],
1131 #define fseeko fseek
1132 #define ftello ftell
1133 #endif /* HAVE_FSEEKO */
1136 dnl Define RAND_MAX if not defined
1137 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1140 #define RAND_MAX 2147483647
1144 dnl Define MAXHOSTNAMELEN if not defined
1145 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1147 #ifndef MAXHOSTNAMELEN
1148 #define MAXHOSTNAMELEN 256
1152 dnl Define IPV6_MIN_MTU if not defined
1153 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1155 #ifndef IPV6_MIN_MTU
1156 #define IPV6_MIN_MTU 1280
1157 #endif /* IPV6_MIN_MTU */
1160 dnl provide snprintf, vsnprintf compat prototype
1161 dnl $1: unique name for compat code
1162 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1164 #ifndef HAVE_SNPRINTF
1165 #define snprintf snprintf_$1
1166 #define vsnprintf vsnprintf_$1
1168 int snprintf (char *str, size_t count, const char *fmt, ...);
1169 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1170 #endif /* HAVE_SNPRINTF */
1173 dnl provide inet_pton compat prototype.
1174 dnl $1: unique name for compat code
1175 AC_DEFUN([AHX_CONFIG_INET_PTON],
1177 #ifndef HAVE_INET_PTON
1178 #define inet_pton inet_pton_$1
1179 int inet_pton(int af, const char* src, void* dst);
1180 #endif /* HAVE_INET_PTON */
1183 dnl provide inet_ntop compat prototype.
1184 dnl $1: unique name for compat code
1185 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1187 #ifndef HAVE_INET_NTOP
1188 #define inet_ntop inet_ntop_$1
1189 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1193 dnl provide inet_aton compat prototype.
1194 dnl $1: unique name for compat code
1195 AC_DEFUN([AHX_CONFIG_INET_ATON],
1197 #ifndef HAVE_INET_ATON
1198 #define inet_aton inet_aton_$1
1199 int inet_aton(const char *cp, struct in_addr *addr);
1203 dnl provide memmove compat prototype.
1204 dnl $1: unique name for compat code
1205 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1207 #ifndef HAVE_MEMMOVE
1208 #define memmove memmove_$1
1209 void *memmove(void *dest, const void *src, size_t n);
1213 dnl provide strlcat compat prototype.
1214 dnl $1: unique name for compat code
1215 AC_DEFUN([AHX_CONFIG_STRLCAT],
1217 #ifndef HAVE_STRLCAT
1218 #define strlcat strlcat_$1
1219 size_t strlcat(char *dst, const char *src, size_t siz);
1223 dnl provide strlcpy compat prototype.
1224 dnl $1: unique name for compat code
1225 AC_DEFUN([AHX_CONFIG_STRLCPY],
1227 #ifndef HAVE_STRLCPY
1228 #define strlcpy strlcpy_$1
1229 size_t strlcpy(char *dst, const char *src, size_t siz);
1233 dnl provide gmtime_r compat prototype.
1234 dnl $1: unique name for compat code
1235 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1237 #ifndef HAVE_GMTIME_R
1238 #define gmtime_r gmtime_r_$1
1239 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1243 dnl provide reallocarray compat prototype.
1244 dnl $1: unique name for compat code
1245 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1247 #ifndef HAVE_REALLOCARRAY
1248 #define reallocarray reallocarray$1
1249 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1253 dnl provide w32 compat definition for sleep
1254 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1256 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1257 #define sleep(x) Sleep((x)*1000) /* on win32 */
1258 #endif /* HAVE_SLEEP */
1261 dnl provide w32 compat definition for usleep
1262 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1265 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1266 #endif /* HAVE_USLEEP */
1269 dnl provide w32 compat definition for random
1270 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1273 #define random rand /* on win32, for tests only (bad random) */
1274 #endif /* HAVE_RANDOM */
1277 dnl provide w32 compat definition for srandom
1278 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1280 #ifndef HAVE_SRANDOM
1281 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1282 #endif /* HAVE_SRANDOM */
1285 dnl provide w32 compat definition for FD_SET_T
1286 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1288 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1289 #ifdef HAVE_WINSOCK2_H
1290 #define FD_SET_T (u_int)
1296 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1297 dnl Used by ACX_STRIP_EXT_FLAGS.
1298 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1299 AC_DEFUN([ACX_CFLAGS_STRIP],
1301 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1302 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1303 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1307 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1308 dnl use with ACX_DETERMINE_EXT_FLAGS.
1309 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1311 AC_MSG_NOTICE([Stripping extension flags...])
1312 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1313 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1314 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
1315 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1316 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1317 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1318 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1319 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1320 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1321 ]) dnl End of ACX_STRIP_EXT_FLAGS
1323 dnl define one omitted flag for config.h
1324 dnl $1: flag name. -D_GNU_SOURCE
1325 dnl $2: replacement define. _GNU_SOURCE
1326 dnl $3: define value, 1
1327 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1328 [#if defined($1) && !defined($2)
1332 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1333 dnl $1: the -DNAME or -DNAME=value string.
1334 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1335 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1338 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1339 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1340 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1341 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1342 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
1343 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1344 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1345 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1346 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1347 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1348 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1351 dnl check if memcmp is using signed characters and replace if so.
1352 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1353 [AC_MSG_CHECKING([if memcmp compares unsigned])
1354 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1360 char a = 255, b = 0;
1361 if(memcmp(&a, &b, 1) < 0)
1365 ]])], [AC_MSG_RESULT([yes]) ],
1366 [ AC_MSG_RESULT([no])
1367 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1369 ], [ AC_MSG_RESULT([cross-compile no])
1370 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1374 dnl define memcmp to its replacement, pass unique id for program as arg
1375 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1376 #ifdef MEMCMP_IS_BROKEN
1377 #include "compat/memcmp.h"
1378 #define memcmp memcmp_$1
1379 int memcmp(const void *x, const void *y, size_t n);
1383 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1384 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1385 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1386 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1387 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1388 ],, [AC_INCLUDES_DEFAULT
1389 #ifdef HAVE_NETINET_IN_H
1390 #include <netinet/in.h>
1392 #ifdef HAVE_SYS_SOCKET_H
1393 #include <sys/socket.h>
1398 #ifdef HAVE_ARPA_INET_H
1399 #include <arpa/inet.h>
1402 ], [AC_INCLUDES_DEFAULT
1403 #ifdef HAVE_NETINET_IN_H
1404 #include <netinet/in.h>
1406 #ifdef HAVE_SYS_SOCKET_H
1407 #include <sys/socket.h>
1412 #ifdef HAVE_ARPA_INET_H
1413 #include <arpa/inet.h>
1417 dnl Check if CC and linker support -fPIE and -pie.
1418 dnl If so, sets them in CFLAGS / LDFLAGS.
1419 AC_DEFUN([ACX_CHECK_PIE], [
1420 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1421 AS_IF([test "x$enable_pie" = "xyes"], [
1422 AC_MSG_CHECKING([if $CC supports PIE])
1423 BAKLDFLAGS="$LDFLAGS"
1425 LDFLAGS="$LDFLAGS -pie"
1426 CFLAGS="$CFLAGS -fPIE"
1427 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1428 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1429 LDFLAGS="$BAKLDFLAGS"
1434 rm -f conftest conftest.c conftest.o
1435 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1439 dnl Check if linker supports -Wl,-z,relro,-z,now.
1440 dnl If so, adds it to LDFLAGS.
1441 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1442 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)]))
1443 AS_IF([test "x$enable_relro_now" = "xyes"], [
1444 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1445 BAKLDFLAGS="$LDFLAGS"
1446 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1447 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1448 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1449 LDFLAGS="$BAKLDFLAGS"
1454 rm -f conftest conftest.c conftest.o
1455 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])