1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
7 # 2015-12-11 FLTO check for new OSX, clang.
8 # 2015-11-18 spelling check fix.
9 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
10 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
11 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
12 # 2013-09-19 FLTO help text improved.
13 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
14 # 2013-06-25 FLTO has --disable-flto option.
15 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
16 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
17 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
18 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
19 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
20 # Fix ACX_MALLOC for redefined malloc error.
21 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
22 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
23 # 2011-11-01 Fix FLTO test for llvm on Lion.
24 # 2011-08-01 Fix nonblock test (broken at v13).
25 # 2011-08-01 Fix autoconf 2.68 warnings
26 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
27 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
28 # 2010-07-02 Add check for ss_family (for minix).
29 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
30 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
31 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
32 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
33 # 2010-01-20 added AHX_COONFIG_STRLCAT
34 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
35 # added ACX_FUNC_MALLOC
36 # fixup some #if to #ifdef
37 # NONBLOCKING test for mingw crosscompile.
38 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
39 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
41 # Automates some of the checking constructs. Aims at portability for POSIX.
42 # Documentation for functions is below.
44 # the following macro's are provided in this file:
45 # (see below for details on each macro).
47 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
48 # ACX_RSRC_VERSION - create windows resource version number.
49 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
50 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
51 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
52 # ACX_DEPFLAG - find cc dependency flags.
53 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
54 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
55 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
56 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
57 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
58 # ACX_TYPE_U_CHAR - u_char type.
59 # ACX_TYPE_RLIM_T - rlim_t type.
60 # ACX_TYPE_SOCKLEN_T - socklen_t type.
61 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
62 # ACX_TYPE_IN_PORT_T - in_port_t type.
63 # ACX_ARG_RPATH - add --disable-rpath option.
64 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
65 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
66 # where --without-ssl is also accepted
67 # ACX_LIB_SSL - setup to link -lssl.
68 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
69 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
70 # ACX_FUNC_DEPRECATED - see if func is deprecated.
71 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
72 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
73 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
74 # ACX_FUNC_MALLOC - check malloc, define replacement .
75 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
76 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
77 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
78 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
79 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
80 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
81 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
82 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
83 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
84 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
85 # AHX_CONFIG_MEMMOVE - memmove compat prototype
86 # AHX_CONFIG_STRLCAT - strlcat compat prototype
87 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
88 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
89 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
90 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
91 # AHX_CONFIG_W32_RANDOM - w32 compat for random
92 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
93 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
94 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
95 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
96 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
97 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
98 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
99 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
100 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
101 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
102 # ACX_CHECK_PIE - add --enable-pie option and check if works
103 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
106 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
107 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
108 dnl $1: the text to change.
110 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
113 dnl Calculate comma separated windows-resource numbers from package version.
114 dnl Picks the first three(,0) or four numbers out of the name.
115 dnl $1: variable for the result
116 AC_DEFUN([ACX_RSRC_VERSION],
117 [$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/' `]
120 dnl Routine to help check for compiler flags.
121 dnl Checks if the compiler will accept the flag.
122 dnl $1: the flag without a - in front, so g to check -g.
123 dnl $2: executed if yes
124 dnl $3: executed if no
125 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
127 AC_REQUIRE([AC_PROG_CC])
128 AC_MSG_CHECKING(whether $CC supports -$1)
129 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
130 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
132 echo 'void f(void){}' >conftest.c
133 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
134 eval "cv_prog_cc_flag_$cache=yes"
136 eval "cv_prog_cc_flag_$cache=no"
138 rm -f conftest conftest.o conftest.c
140 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
151 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
152 dnl ERRFLAG: result, compiler flag to turn warnings into errors
153 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
155 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
156 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
157 [ERRFLAG="$ERRFLAG -errfmt"])
160 dnl Routine to help check for needed compiler flags.
162 dnl $2: the includes and code
163 dnl $3: if the given code only compiles with the flag, execute argument 3
164 dnl $4: if the given code compiles without the flag, execute argument 4
165 dnl $5: with and without flag the compile fails, execute argument 5.
166 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
168 AC_REQUIRE([AC_PROG_CC])
169 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
170 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
172 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
173 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
175 echo '$2' > conftest.c
176 echo 'void f(){}' >>conftest.c
177 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
178 eval "cv_prog_cc_flag_needed_$cache=no"
181 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
182 eval "cv_prog_cc_flag_needed_$cache=yes"
184 eval "cv_prog_cc_flag_needed_$cache=fail"
185 #echo 'Test with flag fails too!'
187 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
188 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
193 rm -f conftest conftest.c conftest.o
195 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
200 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
202 #echo 'Test with flag is no!'
204 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
205 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
210 AC_MSG_RESULT(failed)
217 dnl Check for CC dependency flag
218 dnl DEPFLAG: set to flag that generates dependencies.
219 AC_DEFUN([ACX_DEPFLAG],
221 AC_MSG_CHECKING([$CC dependency flag])
222 echo 'void f(){}' >conftest.c
223 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
226 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
229 DEPFLAG="-MM" # dunno do something
232 AC_MSG_RESULT($DEPFLAG)
237 dnl Determine flags that gives POSIX and BSD functionality.
238 dnl CFLAGS is modified for the result.
239 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
241 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
242 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
244 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
246 ACX_CHECK_COMPILER_FLAG_NEEDED($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,
248 #include "confdefs.h"
251 #include <sys/time.h>
268 const char* str = NULL;
271 t = ctime_r(&time, buf);
274 a = getopt(2, opts, "a");
276 str = gai_strerror(0);
277 if(str && t && tv.tv_usec && msg.msg_control)
281 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
283 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
285 #include "confdefs.h"
288 #include <sys/time.h>
305 const char* str = NULL;
308 t = ctime_r(&time, buf);
311 a = getopt(2, opts, "a");
313 str = gai_strerror(0);
314 if(str && t && tv.tv_usec && msg.msg_control)
318 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
320 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
328 ], [CFLAGS="$CFLAGS $C99FLAG"])
330 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
339 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
341 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
343 #include <netinet/in.h>
346 struct in6_pktinfo inf;
347 int a = (int)sizeof(inf);
350 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
352 # check again for GNU_SOURCE for setresgid. May fail if setresgid
353 # is not available at all. -D_FRSRESGID is to make this check unique.
354 # otherwise we would get the previous cached result.
355 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
360 int a = setresgid(0,0,0);
361 a = setresuid(0,0,0);
364 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
366 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
368 #include "confdefs.h"
379 const char* str = NULL;
380 t = ctime_r(&time, buf);
381 str = gai_strerror(0);
386 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
388 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
390 #include "confdefs.h"
393 #include <sys/time.h>
408 a = getopt(2, opts, "a");
414 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
416 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
418 dnl Check if CC supports -flto.
419 dnl in a way that supports clang and suncc (that flag does something else,
420 dnl but fails to link). It sets it in CFLAGS if it works.
421 AC_DEFUN([ACX_CHECK_FLTO], [
422 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
423 AS_IF([test "x$enable_flto" != "xno"], [
424 AC_MSG_CHECKING([if $CC supports -flto])
426 CFLAGS="$CFLAGS -flto"
427 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
428 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
434 rm -f conftest conftest.c conftest.o
435 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
439 dnl Check the printf-format attribute (if any)
440 dnl result in HAVE_ATTR_FORMAT.
441 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
442 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
443 [AC_REQUIRE([AC_PROG_CC])
444 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
445 AC_CACHE_VAL(ac_cv_c_format_attribute,
446 [ac_cv_c_format_attribute=no
449 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
450 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
454 [ac_cv_c_format_attribute="yes"],
455 [ac_cv_c_format_attribute="no"])
458 AC_MSG_RESULT($ac_cv_c_format_attribute)
459 if test $ac_cv_c_format_attribute = yes; then
460 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
462 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
464 dnl Setup ATTR_FORMAT config.h parts.
465 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
466 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
468 #ifdef HAVE_ATTR_FORMAT
469 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
470 __attribute__ ((format (archetype, string_index, first_to_check)))
471 #else /* !HAVE_ATTR_FORMAT */
472 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
473 #endif /* !HAVE_ATTR_FORMAT */
476 dnl Check how to mark function arguments as unused.
477 dnl result in HAVE_ATTR_UNUSED.
478 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
479 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
480 [AC_REQUIRE([AC_PROG_CC])
481 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
482 AC_CACHE_VAL(ac_cv_c_unused_attribute,
483 [ac_cv_c_unused_attribute=no
486 void f (char *u __attribute__((unused)));
490 [ac_cv_c_unused_attribute="yes"],
491 [ac_cv_c_unused_attribute="no"])
494 dnl Setup ATTR_UNUSED config.h parts.
495 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
496 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
499 # define ATTR_UNUSED(x) x
500 #elif defined(__cplusplus)
501 # define ATTR_UNUSED(x)
502 #elif defined(HAVE_ATTR_UNUSED)
503 # define ATTR_UNUSED(x) x __attribute__((unused))
504 #else /* !HAVE_ATTR_UNUSED */
505 # define ATTR_UNUSED(x) x
506 #endif /* !HAVE_ATTR_UNUSED */
509 AC_MSG_RESULT($ac_cv_c_unused_attribute)
510 if test $ac_cv_c_unused_attribute = yes; then
511 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
515 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
516 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
517 # skip these tests, we do not need them.
518 AC_DEFUN([AC_PROG_F77], [:])
519 AC_DEFUN([AC_PROG_FC], [:])
520 AC_DEFUN([AC_PROG_CXX], [:])
521 AC_DEFUN([AC_PROG_CXXCPP], [:])
522 AC_DEFUN([AC_PROG_OBJC], [:])
523 AC_DEFUN([AC_PROG_OBJCCPP], [:])
524 AC_DEFUN([AC_LIBTOOL_CXX], [:])
525 AC_DEFUN([AC_LIBTOOL_F77], [:])
526 # always use ./libtool unless override from commandline (libtool=mylibtool)
527 if test -z "$libtool"; then
531 # avoid libtool max commandline length test on systems that fork slowly.
533 if echo "$host_os" | grep "sunos4" >/dev/null; then
534 lt_cv_sys_max_cmd_len=32750;
536 AC_PATH_TOOL(AR, ar, [false])
537 if test $AR = false; then
538 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
542 dnl Perform libtool check, portably, only for C
543 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
544 dnl as a requirement so that is gets called before LIBTOOL
545 dnl because libtools 'AC_REQUIRE' names are right after this one, before
546 dnl this function contents.
547 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
551 dnl Detect if u_char type is defined, otherwise define it.
552 AC_DEFUN([ACX_TYPE_U_CHAR],
553 [AC_CHECK_TYPE([u_char], ,
554 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
556 #ifdef HAVE_WINSOCK2_H
557 # include <winsock2.h>
561 dnl Detect if rlim_t type is defined, otherwise define it.
562 AC_DEFUN([ACX_TYPE_RLIM_T],
563 [AC_CHECK_TYPE(rlim_t, ,
564 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
566 #ifdef HAVE_SYS_RESOURCE_H
567 # include <sys/resource.h>
571 dnl Detect if socklen_t type is defined, otherwise define it.
572 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
574 AC_CHECK_TYPE(socklen_t, ,
575 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
577 #ifdef HAVE_SYS_SOCKET_H
578 # include <sys/socket.h>
580 #ifdef HAVE_WS2TCPIP_H
581 # include <ws2tcpip.h>
585 dnl Detect if in_addr_t type is defined, otherwise define it.
586 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
587 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
589 #ifdef HAVE_SYS_TYPES_H
590 # include <sys/types.h>
592 #ifdef HAVE_NETINET_IN_H
593 # include <netinet/in.h>
597 dnl Detect if in_port_t type is defined, otherwise define it.
598 AC_DEFUN([ACX_TYPE_IN_PORT_T],
599 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
601 #ifdef HAVE_SYS_TYPES_H
602 # include <sys/types.h>
604 #ifdef HAVE_NETINET_IN_H
605 # include <netinet/in.h>
609 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
610 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
611 AC_DEFUN([ACX_ARG_RPATH],
614 [ --disable-rpath disable hardcoded rpath (default=enabled)],
615 enable_rpath=$enableval, enable_rpath=yes)
616 if test "x$enable_rpath" = xno; then
617 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
618 AC_CONFIG_COMMANDS([disable-rpath], [
619 sed < libtool > libtool-2 \
620 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
628 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
629 dnl an absolute path.
630 dnl $1: the pathname to add.
631 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
632 if test "x$enable_rpath" = xyes; then
633 if echo "$1" | grep "^/" >/dev/null; then
634 RUNTIME_PATH="$RUNTIME_PATH -R$1"
639 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
640 dnl Takes one argument; the withval checked in those 2 functions
641 dnl sets up the environment for the given openssl path
642 AC_DEFUN([ACX_SSL_CHECKS], [
644 if test x_$withval != x_no; then
645 AC_MSG_CHECKING(for SSL)
646 if test x_$withval = x_ -o x_$withval = x_yes; then
647 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
649 for dir in $withval; do
651 if test -f "$dir/include/openssl/ssl.h"; then
653 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
654 dnl assume /usr/include is already in the include-path.
655 if test "$ssldir" != "/usr"; then
656 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
657 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
662 if test x_$found_ssl != x_yes; then
663 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
665 AC_MSG_RESULT(found in $ssldir)
667 dnl assume /usr is already in the lib and dynlib paths.
668 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
669 LDFLAGS="$LDFLAGS -L$ssldir/lib"
670 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
671 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
674 AC_MSG_CHECKING([for HMAC_CTX_init in -lcrypto])
675 LIBS="$LIBS -lcrypto"
676 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
678 int HMAC_CTX_init(void);
679 (void)HMAC_CTX_init();
682 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
683 [If you have HMAC_CTX_init])
686 # check if -lwsock32 or -lgdi32 are needed.
688 BAKSSLLIBS="$LIBSSL_LIBS"
690 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32"
691 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
693 int HMAC_CTX_init(void);
694 (void)HMAC_CTX_init();
696 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
697 [If you have HMAC_CTX_init])
702 LIBSSL_LIBS="$BAKSSLLIBS"
704 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
705 AC_MSG_CHECKING([if -lcrypto needs -ldl])
707 int HMAC_CTX_init(void);
708 (void)HMAC_CTX_init();
710 AC_DEFINE([HAVE_HMAC_CTX_INIT], 1,
711 [If you have HMAC_CTX_init])
715 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
721 AC_SUBST(RUNTIME_PATH)
723 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
724 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
725 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
726 ])dnl End of ACX_SSL_CHECKS
728 dnl Check for SSL, where SSL is mandatory
729 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
730 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
731 dnl Checks main header files of SSL.
733 AC_DEFUN([ACX_WITH_SSL],
735 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
736 [enable SSL (will check /usr/local/ssl
737 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
741 if test x_$withval = x_no; then
742 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
744 ACX_SSL_CHECKS($withval)
745 ])dnl End of ACX_WITH_SSL
747 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
748 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
749 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
750 dnl Checks main header files of SSL.
752 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
754 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
755 [enable SSL (will check /usr/local/ssl
756 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
760 ACX_SSL_CHECKS($withval)
761 ])dnl End of ACX_WITH_SSL_OPTIONAL
763 dnl Setup to use -lssl
764 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
765 AC_DEFUN([ACX_LIB_SSL],
767 # check if libssl needs libdl
770 AC_MSG_CHECKING([if libssl needs libdl])
771 AC_TRY_LINK_FUNC([SSL_CTX_new], [
777 AC_SEARCH_LIBS([dlopen], [dl])
778 ]) ])dnl End of ACX_LIB_SSL
780 dnl Setup to use very large files (>2Gb).
781 dnl setups fseeko and its own
782 AC_DEFUN([ACX_SYS_LARGEFILE],
785 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
786 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
790 int a = fseeko(stdin, 0, 0);
793 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
796 dnl Check getaddrinfo.
797 dnl Works on linux, solaris, bsd and windows(links winsock).
798 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
799 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
800 [AC_REQUIRE([AC_PROG_CC])
801 AC_MSG_CHECKING(for getaddrinfo)
802 ac_cv_func_getaddrinfo=no
810 char* (*f) () = getaddrinfo;
819 dnl this case on linux, solaris, bsd
820 [ac_cv_func_getaddrinfo="yes"
821 dnl see if on windows
822 if test "$ac_cv_header_windows_h" = "yes"; then
823 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
825 LIBS="$LIBS -lws2_32"
828 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
830 LIBS="$LIBS -lws2_32"
834 #ifdef HAVE_WS2TCPIP_H
835 #include <ws2tcpip.h>
839 (void)getaddrinfo(NULL, NULL, NULL, NULL);
843 ac_cv_func_getaddrinfo="yes"
844 dnl already: LIBS="$LIBS -lws2_32"
845 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
849 ac_cv_func_getaddrinfo="no"
854 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
855 if test $ac_cv_func_getaddrinfo = yes; then
856 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
858 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
860 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
861 dnl $1: function name
862 dnl $2: C-statement that calls the function.
863 dnl $3: includes for the program.
864 dnl $4: executes if yes
865 dnl $5: executes if no
866 AC_DEFUN([ACX_FUNC_DEPRECATED],
868 AC_REQUIRE([AC_PROG_CC])
869 AC_MSG_CHECKING(if $1 is deprecated)
870 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
871 AC_CACHE_VAL(cv_cc_deprecated_$cache,
873 echo '$3' >conftest.c
874 echo 'void f(){ $2 }' >>conftest.c
875 if test -z "`$CC -c conftest.c 2>&1 | grep deprecated`"; then
876 eval "cv_cc_deprecated_$cache=no"
878 eval "cv_cc_deprecated_$cache=yes"
880 rm -f conftest conftest.o conftest.c
882 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
884 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
892 ])dnl end of ACX_FUNC_DEPRECATED
894 dnl check if select and nonblocking sockets actually work.
895 dnl Needs fork(2) and select(2).
896 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
897 dnl a nonblocking socket do not work, a new call to select is necessary.
898 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
900 AC_MSG_CHECKING([if nonblocking sockets work])
901 if echo $target | grep mingw32 >/dev/null; then
902 AC_MSG_RESULT([no (windows)])
903 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
912 #ifdef HAVE_SYS_TYPES_H
913 #include <sys/types.h>
915 #ifdef HAVE_SYS_SOCKET_H
916 #include <sys/socket.h>
918 #ifdef HAVE_NETINET_IN_H
919 #include <netinet/in.h>
921 #ifdef HAVE_ARPA_INET_H
922 #include <arpa/inet.h>
937 struct sockaddr_in a;
938 /* test if select and nonblocking reads work well together */
940 fork child to send 10 messages.
942 then try to nonblocking read the 10 messages
943 then, nonblocking read must give EAGAIN
946 port = 12345 + (time(0)%32);
947 sfd = socket(PF_INET, SOCK_DGRAM, 0);
952 memset(&a, 0, sizeof(a));
953 a.sin_family = AF_INET;
954 a.sin_port = htons(port);
955 a.sin_addr.s_addr = inet_addr("127.0.0.1");
956 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
960 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
965 cfd = socket(PF_INET, SOCK_DGRAM, 0);
967 perror("client socket");
971 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
972 perror("client bind");
975 a.sin_port = htons(port);
977 /* no handler, causes exit in 10 seconds */
980 /* send and receive on the socket */
981 if((p=fork()) == 0) {
982 for(i=0; i<num; i++) {
983 if(sendto(cfd, &i, sizeof(i), 0,
984 (struct sockaddr*)&a, sizeof(a)) < 0) {
999 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1005 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1013 /* now we want to get EAGAIN: nonblocking goodness */
1015 recv(sfd, &x, sizeof(x), 0);
1016 if(errno != EAGAIN) {
1017 perror("trying to recv again");
1020 /* EAGAIN encountered */
1028 AC_MSG_RESULT([yes])
1031 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1033 AC_MSG_RESULT([crosscompile(yes)])
1036 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1038 dnl Check if mkdir has one or two arguments.
1039 dnl defines MKDIR_HAS_ONE_ARG
1040 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1042 AC_MSG_CHECKING([whether mkdir has one arg])
1046 #ifdef HAVE_WINSOCK2_H
1047 #include <winsock2.h>
1049 #ifdef HAVE_SYS_STAT_H
1050 #include <sys/stat.h>
1053 (void)mkdir("directory");
1056 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1060 ])dnl end of ACX_MKDIR_ONE_ARG
1062 dnl Check for ioctlsocket function. works on mingw32 too.
1063 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1066 AC_MSG_CHECKING(for ioctlsocket)
1067 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1068 #ifdef HAVE_WINSOCK2_H
1069 #include <winsock2.h>
1072 (void)ioctlsocket(0, 0, NULL);
1075 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1076 ],[AC_MSG_RESULT(no)])
1077 ])dnl end of ACX_FUNC_IOCTLSOCKET
1079 dnl detect malloc and provide malloc compat prototype.
1080 dnl $1: unique name for compat code
1081 AC_DEFUN([ACX_FUNC_MALLOC],
1083 AC_MSG_CHECKING([for GNU libc compatible malloc])
1084 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1085 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1090 ]], [ if(malloc(0) != 0) return 1;])
1092 [AC_MSG_RESULT([no])
1094 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1095 [AC_MSG_RESULT([yes])
1096 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1097 [AC_MSG_RESULT([no (crosscompile)])
1099 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1102 dnl Define fallback for fseeko and ftello if needed.
1103 AC_DEFUN([AHX_CONFIG_FSEEKO],
1106 #define fseeko fseek
1107 #define ftello ftell
1108 #endif /* HAVE_FSEEKO */
1111 dnl Define RAND_MAX if not defined
1112 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1115 #define RAND_MAX 2147483647
1119 dnl Define MAXHOSTNAMELEN if not defined
1120 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1122 #ifndef MAXHOSTNAMELEN
1123 #define MAXHOSTNAMELEN 256
1127 dnl Define IPV6_MIN_MTU if not defined
1128 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1130 #ifndef IPV6_MIN_MTU
1131 #define IPV6_MIN_MTU 1280
1132 #endif /* IPV6_MIN_MTU */
1135 dnl provide snprintf, vsnprintf compat prototype
1136 dnl $1: unique name for compat code
1137 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1139 #ifndef HAVE_SNPRINTF
1140 #define snprintf snprintf_$1
1141 #define vsnprintf vsnprintf_$1
1143 int snprintf (char *str, size_t count, const char *fmt, ...);
1144 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1145 #endif /* HAVE_SNPRINTF */
1148 dnl provide inet_pton compat prototype.
1149 dnl $1: unique name for compat code
1150 AC_DEFUN([AHX_CONFIG_INET_PTON],
1152 #ifndef HAVE_INET_PTON
1153 #define inet_pton inet_pton_$1
1154 int inet_pton(int af, const char* src, void* dst);
1155 #endif /* HAVE_INET_PTON */
1158 dnl provide inet_ntop compat prototype.
1159 dnl $1: unique name for compat code
1160 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1162 #ifndef HAVE_INET_NTOP
1163 #define inet_ntop inet_ntop_$1
1164 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1168 dnl provide inet_aton compat prototype.
1169 dnl $1: unique name for compat code
1170 AC_DEFUN([AHX_CONFIG_INET_ATON],
1172 #ifndef HAVE_INET_ATON
1173 #define inet_aton inet_aton_$1
1174 int inet_aton(const char *cp, struct in_addr *addr);
1178 dnl provide memmove compat prototype.
1179 dnl $1: unique name for compat code
1180 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1182 #ifndef HAVE_MEMMOVE
1183 #define memmove memmove_$1
1184 void *memmove(void *dest, const void *src, size_t n);
1188 dnl provide strlcat compat prototype.
1189 dnl $1: unique name for compat code
1190 AC_DEFUN([AHX_CONFIG_STRLCAT],
1192 #ifndef HAVE_STRLCAT
1193 #define strlcat strlcat_$1
1194 size_t strlcat(char *dst, const char *src, size_t siz);
1198 dnl provide strlcpy compat prototype.
1199 dnl $1: unique name for compat code
1200 AC_DEFUN([AHX_CONFIG_STRLCPY],
1202 #ifndef HAVE_STRLCPY
1203 #define strlcpy strlcpy_$1
1204 size_t strlcpy(char *dst, const char *src, size_t siz);
1208 dnl provide gmtime_r compat prototype.
1209 dnl $1: unique name for compat code
1210 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1212 #ifndef HAVE_GMTIME_R
1213 #define gmtime_r gmtime_r_$1
1214 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1218 dnl provide reallocarray compat prototype.
1219 dnl $1: unique name for compat code
1220 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1222 #ifndef HAVE_REALLOCARRAY
1223 #define reallocarray reallocarray$1
1224 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1228 dnl provide w32 compat definition for sleep
1229 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1231 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1232 #define sleep(x) Sleep((x)*1000) /* on win32 */
1233 #endif /* HAVE_SLEEP */
1236 dnl provide w32 compat definition for usleep
1237 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1240 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1241 #endif /* HAVE_USLEEP */
1244 dnl provide w32 compat definition for random
1245 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1248 #define random rand /* on win32, for tests only (bad random) */
1249 #endif /* HAVE_RANDOM */
1252 dnl provide w32 compat definition for srandom
1253 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1255 #ifndef HAVE_SRANDOM
1256 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1257 #endif /* HAVE_SRANDOM */
1260 dnl provide w32 compat definition for FD_SET_T
1261 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1263 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1264 #ifdef HAVE_WINSOCK2_H
1265 #define FD_SET_T (u_int)
1271 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1272 dnl Used by ACX_STRIP_EXT_FLAGS.
1273 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1274 AC_DEFUN([ACX_CFLAGS_STRIP],
1276 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1277 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1278 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1282 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1283 dnl use with ACX_DETERMINE_EXT_FLAGS.
1284 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1286 AC_MSG_NOTICE([Stripping extension flags...])
1287 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1288 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1289 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
1290 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1291 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1292 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1293 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1294 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1295 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1296 ]) dnl End of ACX_STRIP_EXT_FLAGS
1298 dnl define one omitted flag for config.h
1299 dnl $1: flag name. -D_GNU_SOURCE
1300 dnl $2: replacement define. _GNU_SOURCE
1301 dnl $3: define value, 1
1302 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1303 [#if defined($1) && !defined($2)
1307 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1308 dnl $1: the -DNAME or -DNAME=value string.
1309 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1310 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1313 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1314 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1315 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1316 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1317 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_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)])