1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0).
7 # 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0.
8 # 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0).
9 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
10 # 2015-12-11 FLTO check for new OSX, clang.
11 # 2015-11-18 spelling check fix.
12 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
13 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
14 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
15 # 2013-09-19 FLTO help text improved.
16 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
17 # 2013-06-25 FLTO has --disable-flto option.
18 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
19 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
20 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
21 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
22 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
23 # Fix ACX_MALLOC for redefined malloc error.
24 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
25 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
26 # 2011-11-01 Fix FLTO test for llvm on Lion.
27 # 2011-08-01 Fix nonblock test (broken at v13).
28 # 2011-08-01 Fix autoconf 2.68 warnings
29 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
30 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
31 # 2010-07-02 Add check for ss_family (for minix).
32 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
33 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
34 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
35 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
36 # 2010-01-20 added AHX_COONFIG_STRLCAT
37 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
38 # added ACX_FUNC_MALLOC
39 # fixup some #if to #ifdef
40 # NONBLOCKING test for mingw crosscompile.
41 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
42 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
44 # Automates some of the checking constructs. Aims at portability for POSIX.
45 # Documentation for functions is below.
47 # the following macro's are provided in this file:
48 # (see below for details on each macro).
50 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
51 # ACX_RSRC_VERSION - create windows resource version number.
52 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
53 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
54 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
55 # ACX_DEPFLAG - find cc dependency flags.
56 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
57 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
58 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
59 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
60 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
61 # ACX_TYPE_U_CHAR - u_char type.
62 # ACX_TYPE_RLIM_T - rlim_t type.
63 # ACX_TYPE_SOCKLEN_T - socklen_t type.
64 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
65 # ACX_TYPE_IN_PORT_T - in_port_t type.
66 # ACX_ARG_RPATH - add --disable-rpath option.
67 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
68 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
69 # where --without-ssl is also accepted
70 # ACX_LIB_SSL - setup to link -lssl.
71 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
72 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
73 # ACX_FUNC_DEPRECATED - see if func is deprecated.
74 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
75 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
76 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
77 # ACX_FUNC_MALLOC - check malloc, define replacement .
78 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
79 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
80 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
81 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
82 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
83 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
84 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
85 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
86 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
87 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
88 # AHX_CONFIG_MEMMOVE - memmove compat prototype
89 # AHX_CONFIG_STRLCAT - strlcat compat prototype
90 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
91 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
92 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
93 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
94 # AHX_CONFIG_W32_RANDOM - w32 compat for random
95 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
96 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
97 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
98 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
99 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
100 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
101 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
102 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
103 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
104 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
105 # ACX_CHECK_PIE - add --enable-pie option and check if works
106 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
109 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
110 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
111 dnl $1: the text to change.
113 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
116 dnl Calculate comma separated windows-resource numbers from package version.
117 dnl Picks the first three(,0) or four numbers out of the name.
118 dnl $1: variable for the result
119 AC_DEFUN([ACX_RSRC_VERSION],
120 [$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/' `]
123 dnl Routine to help check for compiler flags.
124 dnl Checks if the compiler will accept the flag.
125 dnl $1: the flag without a - in front, so g to check -g.
126 dnl $2: executed if yes
127 dnl $3: executed if no
128 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
130 AC_REQUIRE([AC_PROG_CC])
131 AC_MSG_CHECKING(whether $CC supports -$1)
132 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
133 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
135 echo 'void f(void){}' >conftest.c
136 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
137 eval "cv_prog_cc_flag_$cache=yes"
139 eval "cv_prog_cc_flag_$cache=no"
141 rm -f conftest conftest.o conftest.c
143 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
154 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
155 dnl ERRFLAG: result, compiler flag to turn warnings into errors
156 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
158 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
159 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
160 [ERRFLAG="$ERRFLAG -errfmt"])
163 dnl Routine to help check for needed compiler flags.
165 dnl $2: the includes and code
166 dnl $3: if the given code only compiles with the flag, execute argument 3
167 dnl $4: if the given code compiles without the flag, execute argument 4
168 dnl $5: with and without flag the compile fails, execute argument 5.
169 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
171 AC_REQUIRE([AC_PROG_CC])
172 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
173 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
175 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
176 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
178 echo '$2' > conftest.c
179 echo 'void f(){}' >>conftest.c
180 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
181 eval "cv_prog_cc_flag_needed_$cache=no"
184 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
185 eval "cv_prog_cc_flag_needed_$cache=yes"
187 eval "cv_prog_cc_flag_needed_$cache=fail"
188 #echo 'Test with flag fails too!'
190 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
191 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
196 rm -f conftest conftest.c conftest.o
198 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
203 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
205 #echo 'Test with flag is no!'
207 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
208 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
213 AC_MSG_RESULT(failed)
220 dnl Check for CC dependency flag
221 dnl DEPFLAG: set to flag that generates dependencies.
222 AC_DEFUN([ACX_DEPFLAG],
224 AC_MSG_CHECKING([$CC dependency flag])
225 echo 'void f(){}' >conftest.c
226 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
229 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
232 DEPFLAG="-MM" # dunno do something
235 AC_MSG_RESULT($DEPFLAG)
240 dnl Determine flags that gives POSIX and BSD functionality.
241 dnl CFLAGS is modified for the result.
242 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
244 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
245 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
247 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
249 ACX_CHECK_COMPILER_FLAG_NEEDED($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,
251 #include "confdefs.h"
254 #include <sys/time.h>
271 const char* str = NULL;
274 t = ctime_r(&time, buf);
277 a = getopt(2, opts, "a");
279 str = gai_strerror(0);
280 if(str && t && tv.tv_usec && msg.msg_control)
284 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
286 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
288 #include "confdefs.h"
291 #include <sys/time.h>
308 const char* str = NULL;
311 t = ctime_r(&time, buf);
314 a = getopt(2, opts, "a");
316 str = gai_strerror(0);
317 if(str && t && tv.tv_usec && msg.msg_control)
321 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
323 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
331 ], [CFLAGS="$CFLAGS $C99FLAG"])
333 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
342 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
344 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
346 #include <netinet/in.h>
349 struct in6_pktinfo inf;
350 int a = (int)sizeof(inf);
353 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
355 # check again for GNU_SOURCE for setresgid. May fail if setresgid
356 # is not available at all. -D_FRSRESGID is to make this check unique.
357 # otherwise we would get the previous cached result.
358 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
363 int a = setresgid(0,0,0);
364 a = setresuid(0,0,0);
367 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
369 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
371 #include "confdefs.h"
382 const char* str = NULL;
383 t = ctime_r(&time, buf);
384 str = gai_strerror(0);
389 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
391 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
393 #include "confdefs.h"
396 #include <sys/time.h>
411 a = getopt(2, opts, "a");
417 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
419 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
421 dnl Check if CC supports -flto.
422 dnl in a way that supports clang and suncc (that flag does something else,
423 dnl but fails to link). It sets it in CFLAGS if it works.
424 AC_DEFUN([ACX_CHECK_FLTO], [
425 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
426 AS_IF([test "x$enable_flto" != "xno"], [
427 AC_MSG_CHECKING([if $CC supports -flto])
429 CFLAGS="$CFLAGS -flto"
430 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
431 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
437 rm -f conftest conftest.c conftest.o
438 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
442 dnl Check the printf-format attribute (if any)
443 dnl result in HAVE_ATTR_FORMAT.
444 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
445 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
446 [AC_REQUIRE([AC_PROG_CC])
447 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
448 AC_CACHE_VAL(ac_cv_c_format_attribute,
449 [ac_cv_c_format_attribute=no
452 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
453 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
457 [ac_cv_c_format_attribute="yes"],
458 [ac_cv_c_format_attribute="no"])
461 AC_MSG_RESULT($ac_cv_c_format_attribute)
462 if test $ac_cv_c_format_attribute = yes; then
463 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
465 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
467 dnl Setup ATTR_FORMAT config.h parts.
468 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
469 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
471 #ifdef HAVE_ATTR_FORMAT
472 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
473 __attribute__ ((format (archetype, string_index, first_to_check)))
474 #else /* !HAVE_ATTR_FORMAT */
475 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
476 #endif /* !HAVE_ATTR_FORMAT */
479 dnl Check how to mark function arguments as unused.
480 dnl result in HAVE_ATTR_UNUSED.
481 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
482 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
483 [AC_REQUIRE([AC_PROG_CC])
484 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
485 AC_CACHE_VAL(ac_cv_c_unused_attribute,
486 [ac_cv_c_unused_attribute=no
489 void f (char *u __attribute__((unused)));
493 [ac_cv_c_unused_attribute="yes"],
494 [ac_cv_c_unused_attribute="no"])
497 dnl Setup ATTR_UNUSED config.h parts.
498 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
499 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
502 # define ATTR_UNUSED(x) x
503 #elif defined(__cplusplus)
504 # define ATTR_UNUSED(x)
505 #elif defined(HAVE_ATTR_UNUSED)
506 # define ATTR_UNUSED(x) x __attribute__((unused))
507 #else /* !HAVE_ATTR_UNUSED */
508 # define ATTR_UNUSED(x) x
509 #endif /* !HAVE_ATTR_UNUSED */
512 AC_MSG_RESULT($ac_cv_c_unused_attribute)
513 if test $ac_cv_c_unused_attribute = yes; then
514 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
518 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
519 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
520 # skip these tests, we do not need them.
521 AC_DEFUN([AC_PROG_F77], [:])
522 AC_DEFUN([AC_PROG_FC], [:])
523 AC_DEFUN([AC_PROG_CXX], [:])
524 AC_DEFUN([AC_PROG_CXXCPP], [:])
525 AC_DEFUN([AC_PROG_OBJC], [:])
526 AC_DEFUN([AC_PROG_OBJCCPP], [:])
527 AC_DEFUN([AC_LIBTOOL_CXX], [:])
528 AC_DEFUN([AC_LIBTOOL_F77], [:])
529 # always use ./libtool unless override from commandline (libtool=mylibtool)
530 if test -z "$libtool"; then
534 # avoid libtool max commandline length test on systems that fork slowly.
536 if echo "$host_os" | grep "sunos4" >/dev/null; then
537 lt_cv_sys_max_cmd_len=32750;
539 AC_PATH_TOOL(AR, ar, [false])
540 if test $AR = false; then
541 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
545 dnl Perform libtool check, portably, only for C
546 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
547 dnl as a requirement so that is gets called before LIBTOOL
548 dnl because libtools 'AC_REQUIRE' names are right after this one, before
549 dnl this function contents.
550 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
554 dnl Detect if u_char type is defined, otherwise define it.
555 AC_DEFUN([ACX_TYPE_U_CHAR],
556 [AC_CHECK_TYPE([u_char], ,
557 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
559 #ifdef HAVE_WINSOCK2_H
560 # include <winsock2.h>
564 dnl Detect if rlim_t type is defined, otherwise define it.
565 AC_DEFUN([ACX_TYPE_RLIM_T],
566 [AC_CHECK_TYPE(rlim_t, ,
567 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
569 #ifdef HAVE_SYS_RESOURCE_H
570 # include <sys/resource.h>
574 dnl Detect if socklen_t type is defined, otherwise define it.
575 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
577 AC_CHECK_TYPE(socklen_t, ,
578 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
580 #ifdef HAVE_SYS_SOCKET_H
581 # include <sys/socket.h>
583 #ifdef HAVE_WS2TCPIP_H
584 # include <ws2tcpip.h>
588 dnl Detect if in_addr_t type is defined, otherwise define it.
589 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
590 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
592 #ifdef HAVE_SYS_TYPES_H
593 # include <sys/types.h>
595 #ifdef HAVE_NETINET_IN_H
596 # include <netinet/in.h>
600 dnl Detect if in_port_t type is defined, otherwise define it.
601 AC_DEFUN([ACX_TYPE_IN_PORT_T],
602 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
604 #ifdef HAVE_SYS_TYPES_H
605 # include <sys/types.h>
607 #ifdef HAVE_NETINET_IN_H
608 # include <netinet/in.h>
612 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
613 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
614 AC_DEFUN([ACX_ARG_RPATH],
617 [ --disable-rpath disable hardcoded rpath (default=enabled)],
618 enable_rpath=$enableval, enable_rpath=yes)
619 if test "x$enable_rpath" = xno; then
620 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
621 AC_CONFIG_COMMANDS([disable-rpath], [
622 sed < libtool > libtool-2 \
623 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
631 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
632 dnl an absolute path.
633 dnl $1: the pathname to add.
634 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
635 if test "x$enable_rpath" = xyes; then
636 if echo "$1" | grep "^/" >/dev/null; then
637 RUNTIME_PATH="$RUNTIME_PATH -R$1"
642 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
643 dnl Takes one argument; the withval checked in those 2 functions
644 dnl sets up the environment for the given openssl path
645 AC_DEFUN([ACX_SSL_CHECKS], [
647 if test x_$withval != x_no; then
648 AC_MSG_CHECKING(for SSL)
649 if test x_$withval = x_ -o x_$withval = x_yes; then
650 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
652 for dir in $withval; do
654 if test -f "$dir/include/openssl/ssl.h"; then
656 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
657 dnl assume /usr/include is already in the include-path.
658 if test "$ssldir" != "/usr"; then
659 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
660 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
665 if test x_$found_ssl != x_yes; then
666 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
668 AC_MSG_RESULT(found in $ssldir)
670 dnl assume /usr is already in the lib and dynlib paths.
671 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
672 LDFLAGS="$LDFLAGS -L$ssldir/lib"
673 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
674 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
677 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto])
678 LIBS="$LIBS -lcrypto"
679 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
681 int EVP_sha256(void);
685 AC_DEFINE([HAVE_EVP_SHA256], 1,
686 [If you have EVP_sha256])
689 # check if -lwsock32 or -lgdi32 are needed.
691 BAKSSLLIBS="$LIBSSL_LIBS"
692 LIBS="$LIBS -lgdi32 -lws2_32"
693 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32"
694 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
696 int EVP_sha256(void);
699 AC_DEFINE([HAVE_EVP_SHA256], 1,
700 [If you have EVP_sha256])
705 LIBSSL_LIBS="$BAKSSLLIBS"
707 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
708 AC_MSG_CHECKING([if -lcrypto needs -ldl])
710 int EVP_sha256(void);
713 AC_DEFINE([HAVE_EVP_SHA256], 1,
714 [If you have EVP_sha256])
719 LIBSSL_LIBS="$BAKSSLLIBS"
720 LIBS="$LIBS -ldl -pthread"
721 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
722 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread])
724 int EVP_sha256(void);
727 AC_DEFINE([HAVE_EVP_SHA256], 1,
728 [If you have EVP_sha256])
732 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
739 AC_SUBST(RUNTIME_PATH)
741 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
742 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
743 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
744 ])dnl End of ACX_SSL_CHECKS
746 dnl Check for SSL, where SSL is mandatory
747 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
748 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
749 dnl Checks main header files of SSL.
751 AC_DEFUN([ACX_WITH_SSL],
753 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
754 [enable SSL (will check /usr/local/ssl
755 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
759 if test x_$withval = x_no; then
760 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
762 ACX_SSL_CHECKS($withval)
763 ])dnl End of ACX_WITH_SSL
765 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
766 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
767 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
768 dnl Checks main header files of SSL.
770 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
772 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
773 [enable SSL (will check /usr/local/ssl
774 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
778 ACX_SSL_CHECKS($withval)
779 ])dnl End of ACX_WITH_SSL_OPTIONAL
781 dnl Setup to use -lssl
782 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
783 AC_DEFUN([ACX_LIB_SSL],
785 # check if libssl needs libdl
788 AC_MSG_CHECKING([if libssl needs libdl])
789 AC_TRY_LINK_FUNC([SSL_CTX_new], [
795 AC_SEARCH_LIBS([dlopen], [dl])
796 ]) ])dnl End of ACX_LIB_SSL
798 dnl Setup to use very large files (>2Gb).
799 dnl setups fseeko and its own
800 AC_DEFUN([ACX_SYS_LARGEFILE],
803 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
804 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
808 int a = fseeko(stdin, 0, 0);
811 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
814 dnl Check getaddrinfo.
815 dnl Works on linux, solaris, bsd and windows(links winsock).
816 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
817 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
818 [AC_REQUIRE([AC_PROG_CC])
819 AC_MSG_CHECKING(for getaddrinfo)
820 ac_cv_func_getaddrinfo=no
828 char* (*f) () = getaddrinfo;
837 dnl this case on linux, solaris, bsd
838 [ac_cv_func_getaddrinfo="yes"
839 dnl see if on windows
840 if test "$ac_cv_header_windows_h" = "yes"; then
841 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
843 if echo $LIBS | grep 'lws2_32' >/dev/null; then
846 LIBS="$LIBS -lws2_32"
850 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
852 LIBS="$LIBS -lws2_32"
856 #ifdef HAVE_WS2TCPIP_H
857 #include <ws2tcpip.h>
861 (void)getaddrinfo(NULL, NULL, NULL, NULL);
865 ac_cv_func_getaddrinfo="yes"
866 dnl already: LIBS="$LIBS -lws2_32"
867 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
871 ac_cv_func_getaddrinfo="no"
876 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
877 if test $ac_cv_func_getaddrinfo = yes; then
878 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
880 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
882 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
883 dnl $1: function name
884 dnl $2: C-statement that calls the function.
885 dnl $3: includes for the program.
886 dnl $4: executes if yes
887 dnl $5: executes if no
888 AC_DEFUN([ACX_FUNC_DEPRECATED],
890 AC_REQUIRE([AC_PROG_CC])
891 AC_MSG_CHECKING(if $1 is deprecated)
892 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
893 AC_CACHE_VAL(cv_cc_deprecated_$cache,
895 echo '$3' >conftest.c
896 echo 'void f(){ $2 }' >>conftest.c
897 if test -z "`$CC -c conftest.c 2>&1 | grep deprecated`"; then
898 eval "cv_cc_deprecated_$cache=no"
900 eval "cv_cc_deprecated_$cache=yes"
902 rm -f conftest conftest.o conftest.c
904 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
906 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
914 ])dnl end of ACX_FUNC_DEPRECATED
916 dnl check if select and nonblocking sockets actually work.
917 dnl Needs fork(2) and select(2).
918 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
919 dnl a nonblocking socket do not work, a new call to select is necessary.
920 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
922 AC_MSG_CHECKING([if nonblocking sockets work])
923 if echo $target | grep mingw32 >/dev/null; then
924 AC_MSG_RESULT([no (windows)])
925 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
934 #ifdef HAVE_SYS_TYPES_H
935 #include <sys/types.h>
937 #ifdef HAVE_SYS_SOCKET_H
938 #include <sys/socket.h>
940 #ifdef HAVE_NETINET_IN_H
941 #include <netinet/in.h>
943 #ifdef HAVE_ARPA_INET_H
944 #include <arpa/inet.h>
959 struct sockaddr_in a;
960 /* test if select and nonblocking reads work well together */
962 fork child to send 10 messages.
964 then try to nonblocking read the 10 messages
965 then, nonblocking read must give EAGAIN
968 port = 12345 + (time(0)%32);
969 sfd = socket(PF_INET, SOCK_DGRAM, 0);
974 memset(&a, 0, sizeof(a));
975 a.sin_family = AF_INET;
976 a.sin_port = htons(port);
977 a.sin_addr.s_addr = inet_addr("127.0.0.1");
978 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
982 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
987 cfd = socket(PF_INET, SOCK_DGRAM, 0);
989 perror("client socket");
993 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
994 perror("client bind");
997 a.sin_port = htons(port);
999 /* no handler, causes exit in 10 seconds */
1002 /* send and receive on the socket */
1003 if((p=fork()) == 0) {
1004 for(i=0; i<num; i++) {
1005 if(sendto(cfd, &i, sizeof(i), 0,
1006 (struct sockaddr*)&a, sizeof(a)) < 0) {
1021 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1027 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1035 /* now we want to get EAGAIN: nonblocking goodness */
1037 recv(sfd, &x, sizeof(x), 0);
1038 if(errno != EAGAIN) {
1039 perror("trying to recv again");
1042 /* EAGAIN encountered */
1050 AC_MSG_RESULT([yes])
1053 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1055 AC_MSG_RESULT([crosscompile(yes)])
1058 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1060 dnl Check if mkdir has one or two arguments.
1061 dnl defines MKDIR_HAS_ONE_ARG
1062 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1064 AC_MSG_CHECKING([whether mkdir has one arg])
1068 #ifdef HAVE_WINSOCK2_H
1069 #include <winsock2.h>
1071 #ifdef HAVE_SYS_STAT_H
1072 #include <sys/stat.h>
1075 (void)mkdir("directory");
1078 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1082 ])dnl end of ACX_MKDIR_ONE_ARG
1084 dnl Check for ioctlsocket function. works on mingw32 too.
1085 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1088 AC_MSG_CHECKING(for ioctlsocket)
1089 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1090 #ifdef HAVE_WINSOCK2_H
1091 #include <winsock2.h>
1094 (void)ioctlsocket(0, 0, NULL);
1097 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1098 ],[AC_MSG_RESULT(no)])
1099 ])dnl end of ACX_FUNC_IOCTLSOCKET
1101 dnl detect malloc and provide malloc compat prototype.
1102 dnl $1: unique name for compat code
1103 AC_DEFUN([ACX_FUNC_MALLOC],
1105 AC_MSG_CHECKING([for GNU libc compatible malloc])
1106 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1107 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1112 ]], [ if(malloc(0) != 0) return 1;])
1114 [AC_MSG_RESULT([no])
1116 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1117 [AC_MSG_RESULT([yes])
1118 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1119 [AC_MSG_RESULT([no (crosscompile)])
1121 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1124 dnl Define fallback for fseeko and ftello if needed.
1125 AC_DEFUN([AHX_CONFIG_FSEEKO],
1128 #define fseeko fseek
1129 #define ftello ftell
1130 #endif /* HAVE_FSEEKO */
1133 dnl Define RAND_MAX if not defined
1134 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1137 #define RAND_MAX 2147483647
1141 dnl Define MAXHOSTNAMELEN if not defined
1142 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1144 #ifndef MAXHOSTNAMELEN
1145 #define MAXHOSTNAMELEN 256
1149 dnl Define IPV6_MIN_MTU if not defined
1150 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1152 #ifndef IPV6_MIN_MTU
1153 #define IPV6_MIN_MTU 1280
1154 #endif /* IPV6_MIN_MTU */
1157 dnl provide snprintf, vsnprintf compat prototype
1158 dnl $1: unique name for compat code
1159 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1161 #ifndef HAVE_SNPRINTF
1162 #define snprintf snprintf_$1
1163 #define vsnprintf vsnprintf_$1
1165 int snprintf (char *str, size_t count, const char *fmt, ...);
1166 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1167 #endif /* HAVE_SNPRINTF */
1170 dnl provide inet_pton compat prototype.
1171 dnl $1: unique name for compat code
1172 AC_DEFUN([AHX_CONFIG_INET_PTON],
1174 #ifndef HAVE_INET_PTON
1175 #define inet_pton inet_pton_$1
1176 int inet_pton(int af, const char* src, void* dst);
1177 #endif /* HAVE_INET_PTON */
1180 dnl provide inet_ntop compat prototype.
1181 dnl $1: unique name for compat code
1182 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1184 #ifndef HAVE_INET_NTOP
1185 #define inet_ntop inet_ntop_$1
1186 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1190 dnl provide inet_aton compat prototype.
1191 dnl $1: unique name for compat code
1192 AC_DEFUN([AHX_CONFIG_INET_ATON],
1194 #ifndef HAVE_INET_ATON
1195 #define inet_aton inet_aton_$1
1196 int inet_aton(const char *cp, struct in_addr *addr);
1200 dnl provide memmove compat prototype.
1201 dnl $1: unique name for compat code
1202 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1204 #ifndef HAVE_MEMMOVE
1205 #define memmove memmove_$1
1206 void *memmove(void *dest, const void *src, size_t n);
1210 dnl provide strlcat compat prototype.
1211 dnl $1: unique name for compat code
1212 AC_DEFUN([AHX_CONFIG_STRLCAT],
1214 #ifndef HAVE_STRLCAT
1215 #define strlcat strlcat_$1
1216 size_t strlcat(char *dst, const char *src, size_t siz);
1220 dnl provide strlcpy compat prototype.
1221 dnl $1: unique name for compat code
1222 AC_DEFUN([AHX_CONFIG_STRLCPY],
1224 #ifndef HAVE_STRLCPY
1225 #define strlcpy strlcpy_$1
1226 size_t strlcpy(char *dst, const char *src, size_t siz);
1230 dnl provide gmtime_r compat prototype.
1231 dnl $1: unique name for compat code
1232 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1234 #ifndef HAVE_GMTIME_R
1235 #define gmtime_r gmtime_r_$1
1236 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1240 dnl provide reallocarray compat prototype.
1241 dnl $1: unique name for compat code
1242 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1244 #ifndef HAVE_REALLOCARRAY
1245 #define reallocarray reallocarray$1
1246 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1250 dnl provide w32 compat definition for sleep
1251 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1253 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1254 #define sleep(x) Sleep((x)*1000) /* on win32 */
1255 #endif /* HAVE_SLEEP */
1258 dnl provide w32 compat definition for usleep
1259 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1262 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1263 #endif /* HAVE_USLEEP */
1266 dnl provide w32 compat definition for random
1267 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1270 #define random rand /* on win32, for tests only (bad random) */
1271 #endif /* HAVE_RANDOM */
1274 dnl provide w32 compat definition for srandom
1275 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1277 #ifndef HAVE_SRANDOM
1278 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1279 #endif /* HAVE_SRANDOM */
1282 dnl provide w32 compat definition for FD_SET_T
1283 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1285 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1286 #ifdef HAVE_WINSOCK2_H
1287 #define FD_SET_T (u_int)
1293 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1294 dnl Used by ACX_STRIP_EXT_FLAGS.
1295 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1296 AC_DEFUN([ACX_CFLAGS_STRIP],
1298 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1299 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1300 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1304 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1305 dnl use with ACX_DETERMINE_EXT_FLAGS.
1306 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1308 AC_MSG_NOTICE([Stripping extension flags...])
1309 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1310 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1311 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
1312 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1313 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1314 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1315 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1316 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1317 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1318 ]) dnl End of ACX_STRIP_EXT_FLAGS
1320 dnl define one omitted flag for config.h
1321 dnl $1: flag name. -D_GNU_SOURCE
1322 dnl $2: replacement define. _GNU_SOURCE
1323 dnl $3: define value, 1
1324 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1325 [#if defined($1) && !defined($2)
1329 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1330 dnl $1: the -DNAME or -DNAME=value string.
1331 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1332 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1335 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1336 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1337 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1338 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1339 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
1340 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1341 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1342 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1343 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1344 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1345 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1348 dnl check if memcmp is using signed characters and replace if so.
1349 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1350 [AC_MSG_CHECKING([if memcmp compares unsigned])
1351 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1357 char a = 255, b = 0;
1358 if(memcmp(&a, &b, 1) < 0)
1362 ]])], [AC_MSG_RESULT([yes]) ],
1363 [ AC_MSG_RESULT([no])
1364 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1366 ], [ AC_MSG_RESULT([cross-compile no])
1367 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1371 dnl define memcmp to its replacement, pass unique id for program as arg
1372 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1373 #ifdef MEMCMP_IS_BROKEN
1374 #include "compat/memcmp.h"
1375 #define memcmp memcmp_$1
1376 int memcmp(const void *x, const void *y, size_t n);
1380 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1381 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1382 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1383 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1384 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1385 ],, [AC_INCLUDES_DEFAULT
1386 #ifdef HAVE_NETINET_IN_H
1387 #include <netinet/in.h>
1389 #ifdef HAVE_SYS_SOCKET_H
1390 #include <sys/socket.h>
1395 #ifdef HAVE_ARPA_INET_H
1396 #include <arpa/inet.h>
1399 ], [AC_INCLUDES_DEFAULT
1400 #ifdef HAVE_NETINET_IN_H
1401 #include <netinet/in.h>
1403 #ifdef HAVE_SYS_SOCKET_H
1404 #include <sys/socket.h>
1409 #ifdef HAVE_ARPA_INET_H
1410 #include <arpa/inet.h>
1414 dnl Check if CC and linker support -fPIE and -pie.
1415 dnl If so, sets them in CFLAGS / LDFLAGS.
1416 AC_DEFUN([ACX_CHECK_PIE], [
1417 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1418 AS_IF([test "x$enable_pie" = "xyes"], [
1419 AC_MSG_CHECKING([if $CC supports PIE])
1420 BAKLDFLAGS="$LDFLAGS"
1422 LDFLAGS="$LDFLAGS -pie"
1423 CFLAGS="$CFLAGS -fPIE"
1424 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1425 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1426 LDFLAGS="$BAKLDFLAGS"
1431 rm -f conftest conftest.c conftest.o
1432 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1436 dnl Check if linker supports -Wl,-z,relro,-z,now.
1437 dnl If so, adds it to LDFLAGS.
1438 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1439 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)]))
1440 AS_IF([test "x$enable_relro_now" = "xyes"], [
1441 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1442 BAKLDFLAGS="$LDFLAGS"
1443 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1444 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1445 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1446 LDFLAGS="$BAKLDFLAGS"
1451 rm -f conftest conftest.c conftest.o
1452 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])