1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
7 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
8 # 2013-09-19 FLTO help text improved.
9 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
10 # 2013-06-25 FLTO has --disable-flto option.
11 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
12 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
13 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
14 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
15 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
16 # Fix ACX_MALLOC for redefined malloc error.
17 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
18 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
19 # 2011-11-01 Fix FLTO test for llvm on Lion.
20 # 2011-08-01 Fix nonblock test (broken at v13).
21 # 2011-08-01 Fix autoconf 2.68 warnings
22 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
23 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
24 # 2010-07-02 Add check for ss_family (for minix).
25 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
26 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
27 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS seperate, -ldl
28 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
29 # 2010-01-20 added AHX_COONFIG_STRLCAT
30 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
31 # added ACX_FUNC_MALLOC
32 # fixup some #if to #ifdef
33 # NONBLOCKING test for mingw crosscompile.
34 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
35 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
37 # Automates some of the checking constructs. Aims at portability for POSIX.
38 # Documentation for functions is below.
40 # the following macro's are provided in this file:
41 # (see below for details on each macro).
43 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
44 # ACX_RSRC_VERSION - create windows resource version number.
45 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
46 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
47 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
48 # ACX_DEPFLAG - find cc dependency flags.
49 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
50 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
51 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
52 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
53 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
54 # ACX_TYPE_U_CHAR - u_char type.
55 # ACX_TYPE_RLIM_T - rlim_t type.
56 # ACX_TYPE_SOCKLEN_T - socklen_t type.
57 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
58 # ACX_TYPE_IN_PORT_T - in_port_t type.
59 # ACX_ARG_RPATH - add --disable-rpath option.
60 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
61 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
62 # where --without-ssl is also accepted
63 # ACX_LIB_SSL - setup to link -lssl.
64 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
65 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
66 # ACX_FUNC_DEPRECATED - see if func is deprecated.
67 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
68 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
69 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
70 # ACX_FUNC_MALLOC - check malloc, define replacement .
71 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
72 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
73 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
74 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
75 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
76 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
77 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
78 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
79 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
80 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
81 # AHX_CONFIG_MEMMOVE - memmove compat prototype
82 # AHX_CONFIG_STRLCAT - strlcat compat prototype
83 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
84 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
85 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
86 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
87 # AHX_CONFIG_W32_RANDOM - w32 compat for random
88 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
89 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
90 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
91 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
92 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
93 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
94 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
95 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
96 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
97 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
98 # ACX_CHECK_PIE - add --enable-pie option and check if works
99 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
102 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
103 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
104 dnl $1: the text to change.
106 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
109 dnl Calculate comma separated windows-resource numbers from package version.
110 dnl Picks the first three(,0) or four numbers out of the name.
111 dnl $1: variable for the result
112 AC_DEFUN([ACX_RSRC_VERSION],
113 [$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/' `]
116 dnl Routine to help check for compiler flags.
117 dnl Checks if the compiler will accept the flag.
118 dnl $1: the flag without a - in front, so g to check -g.
119 dnl $2: executed if yes
120 dnl $3: executed if no
121 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
123 AC_REQUIRE([AC_PROG_CC])
124 AC_MSG_CHECKING(whether $CC supports -$1)
125 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
126 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
128 echo 'void f(void){}' >conftest.c
129 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
130 eval "cv_prog_cc_flag_$cache=yes"
132 eval "cv_prog_cc_flag_$cache=no"
134 rm -f conftest conftest.o conftest.c
136 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
147 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
148 dnl ERRFLAG: result, compiler flag to turn warnings into errors
149 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
151 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
152 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
153 [ERRFLAG="$ERRFLAG -errfmt"])
156 dnl Routine to help check for needed compiler flags.
158 dnl $2: the includes and code
159 dnl $3: if the given code only compiles with the flag, execute argument 3
160 dnl $4: if the given code compiles without the flag, execute argument 4
161 dnl $5: with and without flag the compile fails, execute argument 5.
162 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
164 AC_REQUIRE([AC_PROG_CC])
165 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
166 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
168 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
169 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
171 echo '$2' > conftest.c
172 echo 'void f(){}' >>conftest.c
173 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
174 eval "cv_prog_cc_flag_needed_$cache=no"
177 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
178 eval "cv_prog_cc_flag_needed_$cache=yes"
180 eval "cv_prog_cc_flag_needed_$cache=fail"
181 #echo 'Test with flag fails too!'
183 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
184 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
189 rm -f conftest conftest.c conftest.o
191 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
196 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
198 #echo 'Test with flag is no!'
200 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
201 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
206 AC_MSG_RESULT(failed)
213 dnl Check for CC dependency flag
214 dnl DEPFLAG: set to flag that generates dependencies.
215 AC_DEFUN([ACX_DEPFLAG],
217 AC_MSG_CHECKING([$CC dependency flag])
218 echo 'void f(){}' >conftest.c
219 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
222 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
225 DEPFLAG="-MM" # dunno do something
228 AC_MSG_RESULT($DEPFLAG)
233 dnl Determine flags that gives POSIX and BSD functionality.
234 dnl CFLAGS is modified for the result.
235 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
237 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
238 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
240 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
242 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE,
244 #include "confdefs.h"
247 #include <sys/time.h>
264 const char* str = NULL;
267 t = ctime_r(&time, buf);
270 a = getopt(2, opts, "a");
272 str = gai_strerror(0);
273 if(str && t && tv.tv_usec && msg.msg_control)
277 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
279 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
281 #include "confdefs.h"
284 #include <sys/time.h>
301 const char* str = NULL;
304 t = ctime_r(&time, buf);
307 a = getopt(2, opts, "a");
309 str = gai_strerror(0);
310 if(str && t && tv.tv_usec && msg.msg_control)
314 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
316 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
324 ], [CFLAGS="$CFLAGS $C99FLAG"])
326 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE,
335 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE"])
337 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
339 #include <netinet/in.h>
342 struct in6_pktinfo inf;
343 int a = (int)sizeof(inf);
346 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
348 # check again for GNU_SOURCE for setresgid. May fail if setresgid
349 # is not available at all. -D_FRSRESGID is to make this check unique.
350 # otherwise we would get the previous cached result.
351 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
356 int a = setresgid(0,0,0);
357 a = setresuid(0,0,0);
360 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
362 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
364 #include "confdefs.h"
375 const char* str = NULL;
376 t = ctime_r(&time, buf);
377 str = gai_strerror(0);
382 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
384 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
386 #include "confdefs.h"
389 #include <sys/time.h>
404 a = getopt(2, opts, "a");
410 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
412 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
414 dnl Check if CC supports -flto.
415 dnl in a way that supports clang and suncc (that flag does something else,
416 dnl but fails to link). It sets it in CFLAGS if it works.
417 AC_DEFUN([ACX_CHECK_FLTO], [
418 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
419 AS_IF([test "x$enable_flto" != "xno"], [
420 AC_MSG_CHECKING([if $CC supports -flto])
422 CFLAGS="$CFLAGS -flto"
423 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
424 if $CC $CFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
430 rm -f conftest conftest.c conftest.o
431 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
435 dnl Check the printf-format attribute (if any)
436 dnl result in HAVE_ATTR_FORMAT.
437 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
438 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
439 [AC_REQUIRE([AC_PROG_CC])
440 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
441 AC_CACHE_VAL(ac_cv_c_format_attribute,
442 [ac_cv_c_format_attribute=no
445 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
446 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
450 [ac_cv_c_format_attribute="yes"],
451 [ac_cv_c_format_attribute="no"])
454 AC_MSG_RESULT($ac_cv_c_format_attribute)
455 if test $ac_cv_c_format_attribute = yes; then
456 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
458 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
460 dnl Setup ATTR_FORMAT config.h parts.
461 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
462 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
464 #ifdef HAVE_ATTR_FORMAT
465 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
466 __attribute__ ((format (archetype, string_index, first_to_check)))
467 #else /* !HAVE_ATTR_FORMAT */
468 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
469 #endif /* !HAVE_ATTR_FORMAT */
472 dnl Check how to mark function arguments as unused.
473 dnl result in HAVE_ATTR_UNUSED.
474 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
475 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
476 [AC_REQUIRE([AC_PROG_CC])
477 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
478 AC_CACHE_VAL(ac_cv_c_unused_attribute,
479 [ac_cv_c_unused_attribute=no
482 void f (char *u __attribute__((unused)));
486 [ac_cv_c_unused_attribute="yes"],
487 [ac_cv_c_unused_attribute="no"])
490 dnl Setup ATTR_UNUSED config.h parts.
491 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
492 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
495 # define ATTR_UNUSED(x) x
496 #elif defined(__cplusplus)
497 # define ATTR_UNUSED(x)
498 #elif defined(HAVE_ATTR_UNUSED)
499 # define ATTR_UNUSED(x) x __attribute__((unused))
500 #else /* !HAVE_ATTR_UNUSED */
501 # define ATTR_UNUSED(x) x
502 #endif /* !HAVE_ATTR_UNUSED */
505 AC_MSG_RESULT($ac_cv_c_unused_attribute)
506 if test $ac_cv_c_unused_attribute = yes; then
507 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
511 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
512 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
513 # skip these tests, we do not need them.
514 AC_DEFUN([AC_PROG_F77], [:])
515 AC_DEFUN([AC_PROG_FC], [:])
516 AC_DEFUN([AC_PROG_CXX], [:])
517 AC_DEFUN([AC_PROG_CXXCPP], [:])
518 AC_DEFUN([AC_PROG_OBJC], [:])
519 AC_DEFUN([AC_PROG_OBJCCPP], [:])
520 AC_DEFUN([AC_LIBTOOL_CXX], [:])
521 AC_DEFUN([AC_LIBTOOL_F77], [:])
522 # always use ./libtool unless override from commandline (libtool=mylibtool)
523 if test -z "$libtool"; then
527 # avoid libtool max commandline length test on systems that fork slowly.
529 if echo "$host_os" | grep "sunos4" >/dev/null; then
530 lt_cv_sys_max_cmd_len=32750;
532 AC_PATH_TOOL(AR, ar, [false])
533 if test $AR = false; then
534 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
538 dnl Perform libtool check, portably, only for C
539 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
540 dnl as a requirement so that is gets called before LIBTOOL
541 dnl because libtools 'AC_REQUIRE' names are right after this one, before
542 dnl this function contents.
543 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
547 dnl Detect if u_char type is defined, otherwise define it.
548 AC_DEFUN([ACX_TYPE_U_CHAR],
549 [AC_CHECK_TYPE([u_char], ,
550 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
552 #ifdef HAVE_WINSOCK2_H
553 # include <winsock2.h>
557 dnl Detect if rlim_t type is defined, otherwise define it.
558 AC_DEFUN([ACX_TYPE_RLIM_T],
559 [AC_CHECK_TYPE(rlim_t, ,
560 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
562 #ifdef HAVE_SYS_RESOURCE_H
563 # include <sys/resource.h>
567 dnl Detect if socklen_t type is defined, otherwise define it.
568 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
570 AC_CHECK_TYPE(socklen_t, ,
571 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
573 #ifdef HAVE_SYS_SOCKET_H
574 # include <sys/socket.h>
576 #ifdef HAVE_WS2TCPIP_H
577 # include <ws2tcpip.h>
581 dnl Detect if in_addr_t type is defined, otherwise define it.
582 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
583 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
585 #ifdef HAVE_SYS_TYPES_H
586 # include <sys/types.h>
588 #ifdef HAVE_NETINET_IN_H
589 # include <netinet/in.h>
593 dnl Detect if in_port_t type is defined, otherwise define it.
594 AC_DEFUN([ACX_TYPE_IN_PORT_T],
595 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
597 #ifdef HAVE_SYS_TYPES_H
598 # include <sys/types.h>
600 #ifdef HAVE_NETINET_IN_H
601 # include <netinet/in.h>
605 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
606 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
607 AC_DEFUN([ACX_ARG_RPATH],
610 [ --disable-rpath disable hardcoded rpath (default=enabled)],
611 enable_rpath=$enableval, enable_rpath=yes)
612 if test "x$enable_rpath" = xno; then
613 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
614 AC_CONFIG_COMMANDS([disable-rpath], [
615 sed < libtool > libtool-2 \
616 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
624 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
625 dnl an absolute path.
626 dnl $1: the pathname to add.
627 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
628 if test "x$enable_rpath" = xyes; then
629 if echo "$1" | grep "^/" >/dev/null; then
630 RUNTIME_PATH="$RUNTIME_PATH -R$1"
635 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
636 dnl Takes one argument; the withval checked in those 2 functions
637 dnl sets up the environment for the given openssl path
638 AC_DEFUN([ACX_SSL_CHECKS], [
640 if test x_$withval != x_no; then
641 AC_MSG_CHECKING(for SSL)
642 if test x_$withval = x_ -o x_$withval = x_yes; then
643 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
645 for dir in $withval; do
647 if test -f "$dir/include/openssl/ssl.h"; then
649 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
650 dnl assume /usr/include is already in the include-path.
651 if test "$ssldir" != "/usr"; then
652 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
653 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
658 if test x_$found_ssl != x_yes; then
659 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
661 AC_MSG_RESULT(found in $ssldir)
663 dnl assume /usr is already in the lib and dynlib paths.
664 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
665 LDFLAGS="$LDFLAGS -L$ssldir/lib"
666 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
667 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
670 AC_MSG_CHECKING([for HMAC_CTX_init in -lcrypto])
671 LIBS="$LIBS -lcrypto"
672 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
674 int HMAC_CTX_init(void);
675 (void)HMAC_CTX_init();
678 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
679 [If you have HMAC_CTX_init])
682 # check if -lwsock32 or -lgdi32 are needed.
684 BAKSSLLIBS="$LIBSSL_LIBS"
686 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32"
687 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
689 int HMAC_CTX_init(void);
690 (void)HMAC_CTX_init();
692 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
693 [If you have HMAC_CTX_init])
698 LIBSSL_LIBS="$BAKSSLLIBS"
700 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
701 AC_MSG_CHECKING([if -lcrypto needs -ldl])
703 int HMAC_CTX_init(void);
704 (void)HMAC_CTX_init();
706 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
707 [If you have HMAC_CTX_init])
711 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
717 AC_SUBST(RUNTIME_PATH)
718 # openssl engine functionality needs dlopen().
720 AC_SEARCH_LIBS([dlopen], [dl])
721 if test "$LIBS" != "$BAKLIBS"; then
722 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
725 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
726 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
727 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
728 ])dnl End of ACX_SSL_CHECKS
730 dnl Check for SSL, where SSL is mandatory
731 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
732 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
733 dnl Checks main header files of SSL.
735 AC_DEFUN([ACX_WITH_SSL],
737 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
738 [enable SSL (will check /usr/local/ssl
739 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
743 if test x_$withval = x_no; then
744 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
746 ACX_SSL_CHECKS($withval)
747 ])dnl End of ACX_WITH_SSL
749 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
750 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
751 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
752 dnl Checks main header files of SSL.
754 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
756 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
757 [enable SSL (will check /usr/local/ssl
758 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
762 ACX_SSL_CHECKS($withval)
763 ])dnl End of ACX_WITH_SSL_OPTIONAL
765 dnl Setup to use -lssl
766 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
767 AC_DEFUN([ACX_LIB_SSL],
769 # check if libssl needs libdl
772 AC_MSG_CHECKING([if libssl needs libdl])
773 AC_TRY_LINK_FUNC([SSL_CTX_new], [
779 AC_SEARCH_LIBS([dlopen], [dl])
780 ]) ])dnl End of ACX_LIB_SSL
782 dnl Setup to use very large files (>2Gb).
783 dnl setups fseeko and its own
784 AC_DEFUN([ACX_SYS_LARGEFILE],
787 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
788 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
792 int a = fseeko(stdin, 0, 0);
795 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
798 dnl Check getaddrinfo.
799 dnl Works on linux, solaris, bsd and windows(links winsock).
800 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
801 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
802 [AC_REQUIRE([AC_PROG_CC])
803 AC_MSG_CHECKING(for getaddrinfo)
804 ac_cv_func_getaddrinfo=no
812 char* (*f) () = getaddrinfo;
821 dnl this case on linux, solaris, bsd
822 [ac_cv_func_getaddrinfo="yes"
823 dnl see if on windows
824 if test "$ac_cv_header_windows_h" = "yes"; then
825 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
827 LIBS="$LIBS -lws2_32"
830 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
832 LIBS="$LIBS -lws2_32"
836 #ifdef HAVE_WS2TCPIP_H
837 #include <ws2tcpip.h>
841 (void)getaddrinfo(NULL, NULL, NULL, NULL);
845 ac_cv_func_getaddrinfo="yes"
846 dnl already: LIBS="$LIBS -lws2_32"
847 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
851 ac_cv_func_getaddrinfo="no"
856 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
857 if test $ac_cv_func_getaddrinfo = yes; then
858 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
860 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
862 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
863 dnl $1: function name
864 dnl $2: C-statement that calls the function.
865 dnl $3: includes for the program.
866 dnl $4: executes if yes
867 dnl $5: executes if no
868 AC_DEFUN([ACX_FUNC_DEPRECATED],
870 AC_REQUIRE([AC_PROG_CC])
871 AC_MSG_CHECKING(if $1 is deprecated)
872 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
873 AC_CACHE_VAL(cv_cc_deprecated_$cache,
875 echo '$3' >conftest.c
876 echo 'void f(){ $2 }' >>conftest.c
877 if test -z "`$CC -c conftest.c 2>&1 | grep deprecated`"; then
878 eval "cv_cc_deprecated_$cache=no"
880 eval "cv_cc_deprecated_$cache=yes"
882 rm -f conftest conftest.o conftest.c
884 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
886 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
894 ])dnl end of ACX_FUNC_DEPRECATED
896 dnl check if select and nonblocking sockets actually work.
897 dnl Needs fork(2) and select(2).
898 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
899 dnl a nonblocking socket do not work, a new call to select is necessary.
900 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
902 AC_MSG_CHECKING([if nonblocking sockets work])
903 if echo $target | grep mingw32 >/dev/null; then
904 AC_MSG_RESULT([no (windows)])
905 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
914 #ifdef HAVE_SYS_TYPES_H
915 #include <sys/types.h>
917 #ifdef HAVE_SYS_SOCKET_H
918 #include <sys/socket.h>
920 #ifdef HAVE_NETINET_IN_H
921 #include <netinet/in.h>
923 #ifdef HAVE_ARPA_INET_H
924 #include <arpa/inet.h>
939 struct sockaddr_in a;
940 /* test if select and nonblocking reads work well together */
942 fork child to send 10 messages.
944 then try to nonblocking read the 10 messages
945 then, nonblocking read must give EAGAIN
948 port = 12345 + (time(0)%32);
949 sfd = socket(PF_INET, SOCK_DGRAM, 0);
954 memset(&a, 0, sizeof(a));
955 a.sin_family = AF_INET;
956 a.sin_port = htons(port);
957 a.sin_addr.s_addr = inet_addr("127.0.0.1");
958 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
962 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
967 cfd = socket(PF_INET, SOCK_DGRAM, 0);
969 perror("client socket");
973 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
974 perror("client bind");
977 a.sin_port = htons(port);
979 /* no handler, causes exit in 10 seconds */
982 /* send and receive on the socket */
983 if((p=fork()) == 0) {
984 for(i=0; i<num; i++) {
985 if(sendto(cfd, &i, sizeof(i), 0,
986 (struct sockaddr*)&a, sizeof(a)) < 0) {
1001 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1007 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1015 /* now we want to get EAGAIN: nonblocking goodness */
1017 recv(sfd, &x, sizeof(x), 0);
1018 if(errno != EAGAIN) {
1019 perror("trying to recv again");
1022 /* EAGAIN encountered */
1030 AC_MSG_RESULT([yes])
1033 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1035 AC_MSG_RESULT([crosscompile(yes)])
1038 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1040 dnl Check if mkdir has one or two arguments.
1041 dnl defines MKDIR_HAS_ONE_ARG
1042 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1044 AC_MSG_CHECKING([whether mkdir has one arg])
1048 #ifdef HAVE_WINSOCK2_H
1049 #include <winsock2.h>
1051 #ifdef HAVE_SYS_STAT_H
1052 #include <sys/stat.h>
1055 (void)mkdir("directory");
1058 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1062 ])dnl end of ACX_MKDIR_ONE_ARG
1064 dnl Check for ioctlsocket function. works on mingw32 too.
1065 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1068 AC_MSG_CHECKING(for ioctlsocket)
1069 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1070 #ifdef HAVE_WINSOCK2_H
1071 #include <winsock2.h>
1074 (void)ioctlsocket(0, 0, NULL);
1077 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1078 ],[AC_MSG_RESULT(no)])
1079 ])dnl end of ACX_FUNC_IOCTLSOCKET
1081 dnl detect malloc and provide malloc compat prototype.
1082 dnl $1: unique name for compat code
1083 AC_DEFUN([ACX_FUNC_MALLOC],
1085 AC_MSG_CHECKING([for GNU libc compatible malloc])
1086 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1087 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1092 ]], [ if(malloc(0) != 0) return 1;])
1094 [AC_MSG_RESULT([no])
1096 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1097 [AC_MSG_RESULT([yes])
1098 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1099 [AC_MSG_RESULT([no (crosscompile)])
1101 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1104 dnl Define fallback for fseeko and ftello if needed.
1105 AC_DEFUN([AHX_CONFIG_FSEEKO],
1108 #define fseeko fseek
1109 #define ftello ftell
1110 #endif /* HAVE_FSEEKO */
1113 dnl Define RAND_MAX if not defined
1114 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1117 #define RAND_MAX 2147483647
1121 dnl Define MAXHOSTNAMELEN if not defined
1122 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1124 #ifndef MAXHOSTNAMELEN
1125 #define MAXHOSTNAMELEN 256
1129 dnl Define IPV6_MIN_MTU if not defined
1130 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1132 #ifndef IPV6_MIN_MTU
1133 #define IPV6_MIN_MTU 1280
1134 #endif /* IPV6_MIN_MTU */
1137 dnl provide snprintf, vsnprintf compat prototype
1138 dnl $1: unique name for compat code
1139 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1141 #ifndef HAVE_SNPRINTF
1142 #define snprintf snprintf_$1
1143 #define vsnprintf vsnprintf_$1
1145 int snprintf (char *str, size_t count, const char *fmt, ...);
1146 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1147 #endif /* HAVE_SNPRINTF */
1150 dnl provide inet_pton compat prototype.
1151 dnl $1: unique name for compat code
1152 AC_DEFUN([AHX_CONFIG_INET_PTON],
1154 #ifndef HAVE_INET_PTON
1155 #define inet_pton inet_pton_$1
1156 int inet_pton(int af, const char* src, void* dst);
1157 #endif /* HAVE_INET_PTON */
1160 dnl provide inet_ntop compat prototype.
1161 dnl $1: unique name for compat code
1162 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1164 #ifndef HAVE_INET_NTOP
1165 #define inet_ntop inet_ntop_$1
1166 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1170 dnl provide inet_aton compat prototype.
1171 dnl $1: unique name for compat code
1172 AC_DEFUN([AHX_CONFIG_INET_ATON],
1174 #ifndef HAVE_INET_ATON
1175 #define inet_aton inet_aton_$1
1176 int inet_aton(const char *cp, struct in_addr *addr);
1180 dnl provide memmove compat prototype.
1181 dnl $1: unique name for compat code
1182 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1184 #ifndef HAVE_MEMMOVE
1185 #define memmove memmove_$1
1186 void *memmove(void *dest, const void *src, size_t n);
1190 dnl provide strlcat compat prototype.
1191 dnl $1: unique name for compat code
1192 AC_DEFUN([AHX_CONFIG_STRLCAT],
1194 #ifndef HAVE_STRLCAT
1195 #define strlcat strlcat_$1
1196 size_t strlcat(char *dst, const char *src, size_t siz);
1200 dnl provide strlcpy compat prototype.
1201 dnl $1: unique name for compat code
1202 AC_DEFUN([AHX_CONFIG_STRLCPY],
1204 #ifndef HAVE_STRLCPY
1205 #define strlcpy strlcpy_$1
1206 size_t strlcpy(char *dst, const char *src, size_t siz);
1210 dnl provide gmtime_r compat prototype.
1211 dnl $1: unique name for compat code
1212 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1214 #ifndef HAVE_GMTIME_R
1215 #define gmtime_r gmtime_r_$1
1216 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1220 dnl provide reallocarray compat prototype.
1221 dnl $1: unique name for compat code
1222 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1224 #ifndef HAVE_REALLOCARRAY
1225 #define reallocarray reallocarray$1
1226 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1230 dnl provide w32 compat definition for sleep
1231 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1233 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1234 #define sleep(x) Sleep((x)*1000) /* on win32 */
1235 #endif /* HAVE_SLEEP */
1238 dnl provide w32 compat definition for usleep
1239 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1242 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1243 #endif /* HAVE_USLEEP */
1246 dnl provide w32 compat definition for random
1247 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1250 #define random rand /* on win32, for tests only (bad random) */
1251 #endif /* HAVE_RANDOM */
1254 dnl provide w32 compat definition for srandom
1255 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1257 #ifndef HAVE_SRANDOM
1258 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1259 #endif /* HAVE_SRANDOM */
1262 dnl provide w32 compat definition for FD_SET_T
1263 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1265 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1266 #ifdef HAVE_WINSOCK2_H
1267 #define FD_SET_T (u_int)
1273 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1274 dnl Used by ACX_STRIP_EXT_FLAGS.
1275 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1276 AC_DEFUN([ACX_CFLAGS_STRIP],
1278 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1279 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1280 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1284 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1285 dnl use with ACX_DETERMINE_EXT_FLAGS.
1286 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1288 AC_MSG_NOTICE([Stripping extension flags...])
1289 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1290 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1291 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1292 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1293 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1294 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1295 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1296 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1297 ]) dnl End of ACX_STRIP_EXT_FLAGS
1299 dnl define one omitted flag for config.h
1300 dnl $1: flag name. -D_GNU_SOURCE
1301 dnl $2: replacement define. _GNU_SOURCE
1302 dnl $3: define value, 1
1303 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1304 [#if defined($1) && !defined($2)
1308 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1309 dnl $1: the -DNAME or -DNAME=value string.
1310 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1311 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1314 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1315 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1316 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1317 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1318 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1319 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1320 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1321 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1322 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1323 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1326 dnl check if memcmp is using signed characters and replace if so.
1327 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1328 [AC_MSG_CHECKING([if memcmp compares unsigned])
1329 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1335 char a = 255, b = 0;
1336 if(memcmp(&a, &b, 1) < 0)
1340 ]])], [AC_MSG_RESULT([yes]) ],
1341 [ AC_MSG_RESULT([no])
1342 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1344 ], [ AC_MSG_RESULT([cross-compile no])
1345 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1349 dnl define memcmp to its replacement, pass unique id for program as arg
1350 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1351 #ifdef MEMCMP_IS_BROKEN
1352 #include "compat/memcmp.h"
1353 #define memcmp memcmp_$1
1354 int memcmp(const void *x, const void *y, size_t n);
1358 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1359 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1360 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1361 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1362 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1363 ],, [AC_INCLUDES_DEFAULT
1364 #ifdef HAVE_NETINET_IN_H
1365 #include <netinet/in.h>
1367 #ifdef HAVE_SYS_SOCKET_H
1368 #include <sys/socket.h>
1373 #ifdef HAVE_ARPA_INET_H
1374 #include <arpa/inet.h>
1377 ], [AC_INCLUDES_DEFAULT
1378 #ifdef HAVE_NETINET_IN_H
1379 #include <netinet/in.h>
1381 #ifdef HAVE_SYS_SOCKET_H
1382 #include <sys/socket.h>
1387 #ifdef HAVE_ARPA_INET_H
1388 #include <arpa/inet.h>
1392 dnl Check if CC and linker support -fPIE and -pie.
1393 dnl If so, sets them in CFLAGS / LDFLAGS.
1394 AC_DEFUN([ACX_CHECK_PIE], [
1395 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1396 AS_IF([test "x$enable_pie" = "xyes"], [
1397 AC_MSG_CHECKING([if $CC supports PIE])
1398 BAKLDFLAGS="$LDFLAGS"
1400 LDFLAGS="$LDFLAGS -pie"
1401 CFLAGS="$CFLAGS -fPIE"
1402 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1403 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1404 LDFLAGS="$BAKLDFLAGS"
1409 rm -f conftest conftest.c conftest.o
1410 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1414 dnl Check if linker supports -Wl,-z,relro,-z,now.
1415 dnl If so, adds it to LDFLAGS.
1416 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1417 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)]))
1418 AS_IF([test "x$enable_relro_now" = "xyes"], [
1419 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1420 BAKLDFLAGS="$LDFLAGS"
1421 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1422 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1423 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1424 LDFLAGS="$BAKLDFLAGS"
1429 rm -f conftest conftest.c conftest.o
1430 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])