1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2015-11-18 spelling check fix.
7 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
8 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
9 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
10 # 2013-09-19 FLTO help text improved.
11 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
12 # 2013-06-25 FLTO has --disable-flto option.
13 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
14 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
15 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
16 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
17 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
18 # Fix ACX_MALLOC for redefined malloc error.
19 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
20 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
21 # 2011-11-01 Fix FLTO test for llvm on Lion.
22 # 2011-08-01 Fix nonblock test (broken at v13).
23 # 2011-08-01 Fix autoconf 2.68 warnings
24 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
25 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
26 # 2010-07-02 Add check for ss_family (for minix).
27 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
28 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
29 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
30 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
31 # 2010-01-20 added AHX_COONFIG_STRLCAT
32 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
33 # added ACX_FUNC_MALLOC
34 # fixup some #if to #ifdef
35 # NONBLOCKING test for mingw crosscompile.
36 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
37 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
39 # Automates some of the checking constructs. Aims at portability for POSIX.
40 # Documentation for functions is below.
42 # the following macro's are provided in this file:
43 # (see below for details on each macro).
45 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
46 # ACX_RSRC_VERSION - create windows resource version number.
47 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
48 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
49 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
50 # ACX_DEPFLAG - find cc dependency flags.
51 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
52 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
53 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
54 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
55 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
56 # ACX_TYPE_U_CHAR - u_char type.
57 # ACX_TYPE_RLIM_T - rlim_t type.
58 # ACX_TYPE_SOCKLEN_T - socklen_t type.
59 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
60 # ACX_TYPE_IN_PORT_T - in_port_t type.
61 # ACX_ARG_RPATH - add --disable-rpath option.
62 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
63 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
64 # where --without-ssl is also accepted
65 # ACX_LIB_SSL - setup to link -lssl.
66 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
67 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
68 # ACX_FUNC_DEPRECATED - see if func is deprecated.
69 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
70 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
71 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
72 # ACX_FUNC_MALLOC - check malloc, define replacement .
73 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
74 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
75 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
76 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
77 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
78 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
79 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
80 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
81 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
82 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
83 # AHX_CONFIG_MEMMOVE - memmove compat prototype
84 # AHX_CONFIG_STRLCAT - strlcat compat prototype
85 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
86 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
87 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
88 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
89 # AHX_CONFIG_W32_RANDOM - w32 compat for random
90 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
91 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
92 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
93 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
94 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
95 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
96 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
97 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
98 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
99 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
100 # ACX_CHECK_PIE - add --enable-pie option and check if works
101 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
104 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
105 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
106 dnl $1: the text to change.
108 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
111 dnl Calculate comma separated windows-resource numbers from package version.
112 dnl Picks the first three(,0) or four numbers out of the name.
113 dnl $1: variable for the result
114 AC_DEFUN([ACX_RSRC_VERSION],
115 [$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/' `]
118 dnl Routine to help check for compiler flags.
119 dnl Checks if the compiler will accept the flag.
120 dnl $1: the flag without a - in front, so g to check -g.
121 dnl $2: executed if yes
122 dnl $3: executed if no
123 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
125 AC_REQUIRE([AC_PROG_CC])
126 AC_MSG_CHECKING(whether $CC supports -$1)
127 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
128 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
130 echo 'void f(void){}' >conftest.c
131 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
132 eval "cv_prog_cc_flag_$cache=yes"
134 eval "cv_prog_cc_flag_$cache=no"
136 rm -f conftest conftest.o conftest.c
138 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
149 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
150 dnl ERRFLAG: result, compiler flag to turn warnings into errors
151 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
153 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
154 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
155 [ERRFLAG="$ERRFLAG -errfmt"])
158 dnl Routine to help check for needed compiler flags.
160 dnl $2: the includes and code
161 dnl $3: if the given code only compiles with the flag, execute argument 3
162 dnl $4: if the given code compiles without the flag, execute argument 4
163 dnl $5: with and without flag the compile fails, execute argument 5.
164 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
166 AC_REQUIRE([AC_PROG_CC])
167 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
168 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
170 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
171 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
173 echo '$2' > conftest.c
174 echo 'void f(){}' >>conftest.c
175 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
176 eval "cv_prog_cc_flag_needed_$cache=no"
179 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
180 eval "cv_prog_cc_flag_needed_$cache=yes"
182 eval "cv_prog_cc_flag_needed_$cache=fail"
183 #echo 'Test with flag fails too!'
185 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
186 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
191 rm -f conftest conftest.c conftest.o
193 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
198 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
200 #echo 'Test with flag is no!'
202 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
203 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
208 AC_MSG_RESULT(failed)
215 dnl Check for CC dependency flag
216 dnl DEPFLAG: set to flag that generates dependencies.
217 AC_DEFUN([ACX_DEPFLAG],
219 AC_MSG_CHECKING([$CC dependency flag])
220 echo 'void f(){}' >conftest.c
221 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
224 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
227 DEPFLAG="-MM" # dunno do something
230 AC_MSG_RESULT($DEPFLAG)
235 dnl Determine flags that gives POSIX and BSD functionality.
236 dnl CFLAGS is modified for the result.
237 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
239 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
240 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
242 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
244 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE,
246 #include "confdefs.h"
249 #include <sys/time.h>
266 const char* str = NULL;
269 t = ctime_r(&time, buf);
272 a = getopt(2, opts, "a");
274 str = gai_strerror(0);
275 if(str && t && tv.tv_usec && msg.msg_control)
279 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
281 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
283 #include "confdefs.h"
286 #include <sys/time.h>
303 const char* str = NULL;
306 t = ctime_r(&time, buf);
309 a = getopt(2, opts, "a");
311 str = gai_strerror(0);
312 if(str && t && tv.tv_usec && msg.msg_control)
316 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
318 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
326 ], [CFLAGS="$CFLAGS $C99FLAG"])
328 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE,
337 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE"])
339 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
341 #include <netinet/in.h>
344 struct in6_pktinfo inf;
345 int a = (int)sizeof(inf);
348 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
350 # check again for GNU_SOURCE for setresgid. May fail if setresgid
351 # is not available at all. -D_FRSRESGID is to make this check unique.
352 # otherwise we would get the previous cached result.
353 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
358 int a = setresgid(0,0,0);
359 a = setresuid(0,0,0);
362 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
364 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
366 #include "confdefs.h"
377 const char* str = NULL;
378 t = ctime_r(&time, buf);
379 str = gai_strerror(0);
384 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
386 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
388 #include "confdefs.h"
391 #include <sys/time.h>
406 a = getopt(2, opts, "a");
412 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
414 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
416 dnl Check if CC supports -flto.
417 dnl in a way that supports clang and suncc (that flag does something else,
418 dnl but fails to link). It sets it in CFLAGS if it works.
419 AC_DEFUN([ACX_CHECK_FLTO], [
420 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
421 AS_IF([test "x$enable_flto" != "xno"], [
422 AC_MSG_CHECKING([if $CC supports -flto])
424 CFLAGS="$CFLAGS -flto"
425 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
426 if $CC $CFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
432 rm -f conftest conftest.c conftest.o
433 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
437 dnl Check the printf-format attribute (if any)
438 dnl result in HAVE_ATTR_FORMAT.
439 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
440 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
441 [AC_REQUIRE([AC_PROG_CC])
442 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
443 AC_CACHE_VAL(ac_cv_c_format_attribute,
444 [ac_cv_c_format_attribute=no
447 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
448 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
452 [ac_cv_c_format_attribute="yes"],
453 [ac_cv_c_format_attribute="no"])
456 AC_MSG_RESULT($ac_cv_c_format_attribute)
457 if test $ac_cv_c_format_attribute = yes; then
458 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
460 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
462 dnl Setup ATTR_FORMAT config.h parts.
463 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
464 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
466 #ifdef HAVE_ATTR_FORMAT
467 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
468 __attribute__ ((format (archetype, string_index, first_to_check)))
469 #else /* !HAVE_ATTR_FORMAT */
470 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
471 #endif /* !HAVE_ATTR_FORMAT */
474 dnl Check how to mark function arguments as unused.
475 dnl result in HAVE_ATTR_UNUSED.
476 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
477 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
478 [AC_REQUIRE([AC_PROG_CC])
479 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
480 AC_CACHE_VAL(ac_cv_c_unused_attribute,
481 [ac_cv_c_unused_attribute=no
484 void f (char *u __attribute__((unused)));
488 [ac_cv_c_unused_attribute="yes"],
489 [ac_cv_c_unused_attribute="no"])
492 dnl Setup ATTR_UNUSED config.h parts.
493 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
494 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
497 # define ATTR_UNUSED(x) x
498 #elif defined(__cplusplus)
499 # define ATTR_UNUSED(x)
500 #elif defined(HAVE_ATTR_UNUSED)
501 # define ATTR_UNUSED(x) x __attribute__((unused))
502 #else /* !HAVE_ATTR_UNUSED */
503 # define ATTR_UNUSED(x) x
504 #endif /* !HAVE_ATTR_UNUSED */
507 AC_MSG_RESULT($ac_cv_c_unused_attribute)
508 if test $ac_cv_c_unused_attribute = yes; then
509 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
513 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
514 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
515 # skip these tests, we do not need them.
516 AC_DEFUN([AC_PROG_F77], [:])
517 AC_DEFUN([AC_PROG_FC], [:])
518 AC_DEFUN([AC_PROG_CXX], [:])
519 AC_DEFUN([AC_PROG_CXXCPP], [:])
520 AC_DEFUN([AC_PROG_OBJC], [:])
521 AC_DEFUN([AC_PROG_OBJCCPP], [:])
522 AC_DEFUN([AC_LIBTOOL_CXX], [:])
523 AC_DEFUN([AC_LIBTOOL_F77], [:])
524 # always use ./libtool unless override from commandline (libtool=mylibtool)
525 if test -z "$libtool"; then
529 # avoid libtool max commandline length test on systems that fork slowly.
531 if echo "$host_os" | grep "sunos4" >/dev/null; then
532 lt_cv_sys_max_cmd_len=32750;
534 AC_PATH_TOOL(AR, ar, [false])
535 if test $AR = false; then
536 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
540 dnl Perform libtool check, portably, only for C
541 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
542 dnl as a requirement so that is gets called before LIBTOOL
543 dnl because libtools 'AC_REQUIRE' names are right after this one, before
544 dnl this function contents.
545 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
549 dnl Detect if u_char type is defined, otherwise define it.
550 AC_DEFUN([ACX_TYPE_U_CHAR],
551 [AC_CHECK_TYPE([u_char], ,
552 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
554 #ifdef HAVE_WINSOCK2_H
555 # include <winsock2.h>
559 dnl Detect if rlim_t type is defined, otherwise define it.
560 AC_DEFUN([ACX_TYPE_RLIM_T],
561 [AC_CHECK_TYPE(rlim_t, ,
562 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
564 #ifdef HAVE_SYS_RESOURCE_H
565 # include <sys/resource.h>
569 dnl Detect if socklen_t type is defined, otherwise define it.
570 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
572 AC_CHECK_TYPE(socklen_t, ,
573 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
575 #ifdef HAVE_SYS_SOCKET_H
576 # include <sys/socket.h>
578 #ifdef HAVE_WS2TCPIP_H
579 # include <ws2tcpip.h>
583 dnl Detect if in_addr_t type is defined, otherwise define it.
584 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
585 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
587 #ifdef HAVE_SYS_TYPES_H
588 # include <sys/types.h>
590 #ifdef HAVE_NETINET_IN_H
591 # include <netinet/in.h>
595 dnl Detect if in_port_t type is defined, otherwise define it.
596 AC_DEFUN([ACX_TYPE_IN_PORT_T],
597 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_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 Add option to disable the evil rpath. Check whether to use rpath or not.
608 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
609 AC_DEFUN([ACX_ARG_RPATH],
612 [ --disable-rpath disable hardcoded rpath (default=enabled)],
613 enable_rpath=$enableval, enable_rpath=yes)
614 if test "x$enable_rpath" = xno; then
615 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
616 AC_CONFIG_COMMANDS([disable-rpath], [
617 sed < libtool > libtool-2 \
618 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
626 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
627 dnl an absolute path.
628 dnl $1: the pathname to add.
629 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
630 if test "x$enable_rpath" = xyes; then
631 if echo "$1" | grep "^/" >/dev/null; then
632 RUNTIME_PATH="$RUNTIME_PATH -R$1"
637 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
638 dnl Takes one argument; the withval checked in those 2 functions
639 dnl sets up the environment for the given openssl path
640 AC_DEFUN([ACX_SSL_CHECKS], [
642 if test x_$withval != x_no; then
643 AC_MSG_CHECKING(for SSL)
644 if test x_$withval = x_ -o x_$withval = x_yes; then
645 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
647 for dir in $withval; do
649 if test -f "$dir/include/openssl/ssl.h"; then
651 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
652 dnl assume /usr/include is already in the include-path.
653 if test "$ssldir" != "/usr"; then
654 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
655 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
660 if test x_$found_ssl != x_yes; then
661 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
663 AC_MSG_RESULT(found in $ssldir)
665 dnl assume /usr is already in the lib and dynlib paths.
666 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
667 LDFLAGS="$LDFLAGS -L$ssldir/lib"
668 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
669 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
672 AC_MSG_CHECKING([for HMAC_CTX_init in -lcrypto])
673 LIBS="$LIBS -lcrypto"
674 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
676 int HMAC_CTX_init(void);
677 (void)HMAC_CTX_init();
680 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
681 [If you have HMAC_CTX_init])
684 # check if -lwsock32 or -lgdi32 are needed.
686 BAKSSLLIBS="$LIBSSL_LIBS"
688 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32"
689 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
691 int HMAC_CTX_init(void);
692 (void)HMAC_CTX_init();
694 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
695 [If you have HMAC_CTX_init])
700 LIBSSL_LIBS="$BAKSSLLIBS"
702 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
703 AC_MSG_CHECKING([if -lcrypto needs -ldl])
705 int HMAC_CTX_init(void);
706 (void)HMAC_CTX_init();
708 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
709 [If you have HMAC_CTX_init])
713 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
719 AC_SUBST(RUNTIME_PATH)
721 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
722 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
723 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
724 ])dnl End of ACX_SSL_CHECKS
726 dnl Check for SSL, where SSL is mandatory
727 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
728 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
729 dnl Checks main header files of SSL.
731 AC_DEFUN([ACX_WITH_SSL],
733 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
734 [enable SSL (will check /usr/local/ssl
735 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
739 if test x_$withval = x_no; then
740 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
742 ACX_SSL_CHECKS($withval)
743 ])dnl End of ACX_WITH_SSL
745 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
746 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
747 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
748 dnl Checks main header files of SSL.
750 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
752 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
753 [enable SSL (will check /usr/local/ssl
754 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
758 ACX_SSL_CHECKS($withval)
759 ])dnl End of ACX_WITH_SSL_OPTIONAL
761 dnl Setup to use -lssl
762 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
763 AC_DEFUN([ACX_LIB_SSL],
765 # check if libssl needs libdl
768 AC_MSG_CHECKING([if libssl needs libdl])
769 AC_TRY_LINK_FUNC([SSL_CTX_new], [
775 AC_SEARCH_LIBS([dlopen], [dl])
776 ]) ])dnl End of ACX_LIB_SSL
778 dnl Setup to use very large files (>2Gb).
779 dnl setups fseeko and its own
780 AC_DEFUN([ACX_SYS_LARGEFILE],
783 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
784 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
788 int a = fseeko(stdin, 0, 0);
791 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
794 dnl Check getaddrinfo.
795 dnl Works on linux, solaris, bsd and windows(links winsock).
796 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
797 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
798 [AC_REQUIRE([AC_PROG_CC])
799 AC_MSG_CHECKING(for getaddrinfo)
800 ac_cv_func_getaddrinfo=no
808 char* (*f) () = getaddrinfo;
817 dnl this case on linux, solaris, bsd
818 [ac_cv_func_getaddrinfo="yes"
819 dnl see if on windows
820 if test "$ac_cv_header_windows_h" = "yes"; then
821 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
823 LIBS="$LIBS -lws2_32"
826 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
828 LIBS="$LIBS -lws2_32"
832 #ifdef HAVE_WS2TCPIP_H
833 #include <ws2tcpip.h>
837 (void)getaddrinfo(NULL, NULL, NULL, NULL);
841 ac_cv_func_getaddrinfo="yes"
842 dnl already: LIBS="$LIBS -lws2_32"
843 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
847 ac_cv_func_getaddrinfo="no"
852 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
853 if test $ac_cv_func_getaddrinfo = yes; then
854 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
856 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
858 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
859 dnl $1: function name
860 dnl $2: C-statement that calls the function.
861 dnl $3: includes for the program.
862 dnl $4: executes if yes
863 dnl $5: executes if no
864 AC_DEFUN([ACX_FUNC_DEPRECATED],
866 AC_REQUIRE([AC_PROG_CC])
867 AC_MSG_CHECKING(if $1 is deprecated)
868 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
869 AC_CACHE_VAL(cv_cc_deprecated_$cache,
871 echo '$3' >conftest.c
872 echo 'void f(){ $2 }' >>conftest.c
873 if test -z "`$CC -c conftest.c 2>&1 | grep deprecated`"; then
874 eval "cv_cc_deprecated_$cache=no"
876 eval "cv_cc_deprecated_$cache=yes"
878 rm -f conftest conftest.o conftest.c
880 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
882 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
890 ])dnl end of ACX_FUNC_DEPRECATED
892 dnl check if select and nonblocking sockets actually work.
893 dnl Needs fork(2) and select(2).
894 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
895 dnl a nonblocking socket do not work, a new call to select is necessary.
896 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
898 AC_MSG_CHECKING([if nonblocking sockets work])
899 if echo $target | grep mingw32 >/dev/null; then
900 AC_MSG_RESULT([no (windows)])
901 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
910 #ifdef HAVE_SYS_TYPES_H
911 #include <sys/types.h>
913 #ifdef HAVE_SYS_SOCKET_H
914 #include <sys/socket.h>
916 #ifdef HAVE_NETINET_IN_H
917 #include <netinet/in.h>
919 #ifdef HAVE_ARPA_INET_H
920 #include <arpa/inet.h>
935 struct sockaddr_in a;
936 /* test if select and nonblocking reads work well together */
938 fork child to send 10 messages.
940 then try to nonblocking read the 10 messages
941 then, nonblocking read must give EAGAIN
944 port = 12345 + (time(0)%32);
945 sfd = socket(PF_INET, SOCK_DGRAM, 0);
950 memset(&a, 0, sizeof(a));
951 a.sin_family = AF_INET;
952 a.sin_port = htons(port);
953 a.sin_addr.s_addr = inet_addr("127.0.0.1");
954 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
958 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
963 cfd = socket(PF_INET, SOCK_DGRAM, 0);
965 perror("client socket");
969 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
970 perror("client bind");
973 a.sin_port = htons(port);
975 /* no handler, causes exit in 10 seconds */
978 /* send and receive on the socket */
979 if((p=fork()) == 0) {
980 for(i=0; i<num; i++) {
981 if(sendto(cfd, &i, sizeof(i), 0,
982 (struct sockaddr*)&a, sizeof(a)) < 0) {
997 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1003 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1011 /* now we want to get EAGAIN: nonblocking goodness */
1013 recv(sfd, &x, sizeof(x), 0);
1014 if(errno != EAGAIN) {
1015 perror("trying to recv again");
1018 /* EAGAIN encountered */
1026 AC_MSG_RESULT([yes])
1029 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1031 AC_MSG_RESULT([crosscompile(yes)])
1034 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1036 dnl Check if mkdir has one or two arguments.
1037 dnl defines MKDIR_HAS_ONE_ARG
1038 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1040 AC_MSG_CHECKING([whether mkdir has one arg])
1044 #ifdef HAVE_WINSOCK2_H
1045 #include <winsock2.h>
1047 #ifdef HAVE_SYS_STAT_H
1048 #include <sys/stat.h>
1051 (void)mkdir("directory");
1054 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1058 ])dnl end of ACX_MKDIR_ONE_ARG
1060 dnl Check for ioctlsocket function. works on mingw32 too.
1061 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1064 AC_MSG_CHECKING(for ioctlsocket)
1065 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1066 #ifdef HAVE_WINSOCK2_H
1067 #include <winsock2.h>
1070 (void)ioctlsocket(0, 0, NULL);
1073 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1074 ],[AC_MSG_RESULT(no)])
1075 ])dnl end of ACX_FUNC_IOCTLSOCKET
1077 dnl detect malloc and provide malloc compat prototype.
1078 dnl $1: unique name for compat code
1079 AC_DEFUN([ACX_FUNC_MALLOC],
1081 AC_MSG_CHECKING([for GNU libc compatible malloc])
1082 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1083 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1088 ]], [ if(malloc(0) != 0) return 1;])
1090 [AC_MSG_RESULT([no])
1092 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1093 [AC_MSG_RESULT([yes])
1094 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1095 [AC_MSG_RESULT([no (crosscompile)])
1097 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1100 dnl Define fallback for fseeko and ftello if needed.
1101 AC_DEFUN([AHX_CONFIG_FSEEKO],
1104 #define fseeko fseek
1105 #define ftello ftell
1106 #endif /* HAVE_FSEEKO */
1109 dnl Define RAND_MAX if not defined
1110 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1113 #define RAND_MAX 2147483647
1117 dnl Define MAXHOSTNAMELEN if not defined
1118 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1120 #ifndef MAXHOSTNAMELEN
1121 #define MAXHOSTNAMELEN 256
1125 dnl Define IPV6_MIN_MTU if not defined
1126 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1128 #ifndef IPV6_MIN_MTU
1129 #define IPV6_MIN_MTU 1280
1130 #endif /* IPV6_MIN_MTU */
1133 dnl provide snprintf, vsnprintf compat prototype
1134 dnl $1: unique name for compat code
1135 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1137 #ifndef HAVE_SNPRINTF
1138 #define snprintf snprintf_$1
1139 #define vsnprintf vsnprintf_$1
1141 int snprintf (char *str, size_t count, const char *fmt, ...);
1142 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1143 #endif /* HAVE_SNPRINTF */
1146 dnl provide inet_pton compat prototype.
1147 dnl $1: unique name for compat code
1148 AC_DEFUN([AHX_CONFIG_INET_PTON],
1150 #ifndef HAVE_INET_PTON
1151 #define inet_pton inet_pton_$1
1152 int inet_pton(int af, const char* src, void* dst);
1153 #endif /* HAVE_INET_PTON */
1156 dnl provide inet_ntop compat prototype.
1157 dnl $1: unique name for compat code
1158 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1160 #ifndef HAVE_INET_NTOP
1161 #define inet_ntop inet_ntop_$1
1162 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1166 dnl provide inet_aton compat prototype.
1167 dnl $1: unique name for compat code
1168 AC_DEFUN([AHX_CONFIG_INET_ATON],
1170 #ifndef HAVE_INET_ATON
1171 #define inet_aton inet_aton_$1
1172 int inet_aton(const char *cp, struct in_addr *addr);
1176 dnl provide memmove compat prototype.
1177 dnl $1: unique name for compat code
1178 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1180 #ifndef HAVE_MEMMOVE
1181 #define memmove memmove_$1
1182 void *memmove(void *dest, const void *src, size_t n);
1186 dnl provide strlcat compat prototype.
1187 dnl $1: unique name for compat code
1188 AC_DEFUN([AHX_CONFIG_STRLCAT],
1190 #ifndef HAVE_STRLCAT
1191 #define strlcat strlcat_$1
1192 size_t strlcat(char *dst, const char *src, size_t siz);
1196 dnl provide strlcpy compat prototype.
1197 dnl $1: unique name for compat code
1198 AC_DEFUN([AHX_CONFIG_STRLCPY],
1200 #ifndef HAVE_STRLCPY
1201 #define strlcpy strlcpy_$1
1202 size_t strlcpy(char *dst, const char *src, size_t siz);
1206 dnl provide gmtime_r compat prototype.
1207 dnl $1: unique name for compat code
1208 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1210 #ifndef HAVE_GMTIME_R
1211 #define gmtime_r gmtime_r_$1
1212 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1216 dnl provide reallocarray compat prototype.
1217 dnl $1: unique name for compat code
1218 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1220 #ifndef HAVE_REALLOCARRAY
1221 #define reallocarray reallocarray$1
1222 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1226 dnl provide w32 compat definition for sleep
1227 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1229 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1230 #define sleep(x) Sleep((x)*1000) /* on win32 */
1231 #endif /* HAVE_SLEEP */
1234 dnl provide w32 compat definition for usleep
1235 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1238 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1239 #endif /* HAVE_USLEEP */
1242 dnl provide w32 compat definition for random
1243 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1246 #define random rand /* on win32, for tests only (bad random) */
1247 #endif /* HAVE_RANDOM */
1250 dnl provide w32 compat definition for srandom
1251 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1253 #ifndef HAVE_SRANDOM
1254 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1255 #endif /* HAVE_SRANDOM */
1258 dnl provide w32 compat definition for FD_SET_T
1259 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1261 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1262 #ifdef HAVE_WINSOCK2_H
1263 #define FD_SET_T (u_int)
1269 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1270 dnl Used by ACX_STRIP_EXT_FLAGS.
1271 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1272 AC_DEFUN([ACX_CFLAGS_STRIP],
1274 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1275 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1276 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1280 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1281 dnl use with ACX_DETERMINE_EXT_FLAGS.
1282 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1284 AC_MSG_NOTICE([Stripping extension flags...])
1285 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1286 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1287 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1288 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1289 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1290 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1291 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1292 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1293 ]) dnl End of ACX_STRIP_EXT_FLAGS
1295 dnl define one omitted flag for config.h
1296 dnl $1: flag name. -D_GNU_SOURCE
1297 dnl $2: replacement define. _GNU_SOURCE
1298 dnl $3: define value, 1
1299 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1300 [#if defined($1) && !defined($2)
1304 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1305 dnl $1: the -DNAME or -DNAME=value string.
1306 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1307 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1310 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1311 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1312 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1313 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1314 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1315 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1316 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1317 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1318 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1319 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1322 dnl check if memcmp is using signed characters and replace if so.
1323 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1324 [AC_MSG_CHECKING([if memcmp compares unsigned])
1325 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1331 char a = 255, b = 0;
1332 if(memcmp(&a, &b, 1) < 0)
1336 ]])], [AC_MSG_RESULT([yes]) ],
1337 [ AC_MSG_RESULT([no])
1338 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1340 ], [ AC_MSG_RESULT([cross-compile no])
1341 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1345 dnl define memcmp to its replacement, pass unique id for program as arg
1346 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1347 #ifdef MEMCMP_IS_BROKEN
1348 #include "compat/memcmp.h"
1349 #define memcmp memcmp_$1
1350 int memcmp(const void *x, const void *y, size_t n);
1354 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1355 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1356 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1357 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1358 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1359 ],, [AC_INCLUDES_DEFAULT
1360 #ifdef HAVE_NETINET_IN_H
1361 #include <netinet/in.h>
1363 #ifdef HAVE_SYS_SOCKET_H
1364 #include <sys/socket.h>
1369 #ifdef HAVE_ARPA_INET_H
1370 #include <arpa/inet.h>
1373 ], [AC_INCLUDES_DEFAULT
1374 #ifdef HAVE_NETINET_IN_H
1375 #include <netinet/in.h>
1377 #ifdef HAVE_SYS_SOCKET_H
1378 #include <sys/socket.h>
1383 #ifdef HAVE_ARPA_INET_H
1384 #include <arpa/inet.h>
1388 dnl Check if CC and linker support -fPIE and -pie.
1389 dnl If so, sets them in CFLAGS / LDFLAGS.
1390 AC_DEFUN([ACX_CHECK_PIE], [
1391 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1392 AS_IF([test "x$enable_pie" = "xyes"], [
1393 AC_MSG_CHECKING([if $CC supports PIE])
1394 BAKLDFLAGS="$LDFLAGS"
1396 LDFLAGS="$LDFLAGS -pie"
1397 CFLAGS="$CFLAGS -fPIE"
1398 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1399 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1400 LDFLAGS="$BAKLDFLAGS"
1405 rm -f conftest conftest.c conftest.o
1406 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1410 dnl Check if linker supports -Wl,-z,relro,-z,now.
1411 dnl If so, adds it to LDFLAGS.
1412 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1413 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)]))
1414 AS_IF([test "x$enable_relro_now" = "xyes"], [
1415 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1416 BAKLDFLAGS="$LDFLAGS"
1417 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1418 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1419 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1420 LDFLAGS="$BAKLDFLAGS"
1425 rm -f conftest conftest.c conftest.o
1426 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])