1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2021-01-05 fix defun for aclocal
7 # 2021-01-05 autoconf 2.70 autoupdate and fixes, no AC_TRY_COMPILE
8 # 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0).
9 # 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0.
10 # 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0).
11 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
12 # 2015-12-11 FLTO check for new OSX, clang.
13 # 2015-11-18 spelling check fix.
14 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
15 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
16 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
17 # 2013-09-19 FLTO help text improved.
18 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
19 # 2013-06-25 FLTO has --disable-flto option.
20 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
21 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
22 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
23 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
24 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
25 # Fix ACX_MALLOC for redefined malloc error.
26 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
27 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
28 # 2011-11-01 Fix FLTO test for llvm on Lion.
29 # 2011-08-01 Fix nonblock test (broken at v13).
30 # 2011-08-01 Fix autoconf 2.68 warnings
31 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
32 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
33 # 2010-07-02 Add check for ss_family (for minix).
34 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
35 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
36 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
37 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
38 # 2010-01-20 added AHX_COONFIG_STRLCAT
39 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
40 # added ACX_FUNC_MALLOC
41 # fixup some #if to #ifdef
42 # NONBLOCKING test for mingw crosscompile.
43 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
44 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
46 # Automates some of the checking constructs. Aims at portability for POSIX.
47 # Documentation for functions is below.
49 # the following macro's are provided in this file:
50 # (see below for details on each macro).
52 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
53 # ACX_RSRC_VERSION - create windows resource version number.
54 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
55 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
56 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
57 # ACX_DEPFLAG - find cc dependency flags.
58 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
59 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
60 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
61 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
62 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
63 # ACX_TYPE_U_CHAR - u_char type.
64 # ACX_TYPE_RLIM_T - rlim_t type.
65 # ACX_TYPE_SOCKLEN_T - socklen_t type.
66 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
67 # ACX_TYPE_IN_PORT_T - in_port_t type.
68 # ACX_ARG_RPATH - add --disable-rpath option.
69 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
70 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
71 # where --without-ssl is also accepted
72 # ACX_LIB_SSL - setup to link -lssl.
73 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
74 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
75 # ACX_FUNC_DEPRECATED - see if func is deprecated.
76 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
77 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
78 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
79 # ACX_FUNC_MALLOC - check malloc, define replacement .
80 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
81 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
82 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
83 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
84 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
85 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
86 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
87 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
88 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
89 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
90 # AHX_CONFIG_MEMMOVE - memmove compat prototype
91 # AHX_CONFIG_STRLCAT - strlcat compat prototype
92 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
93 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
94 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
95 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
96 # AHX_CONFIG_W32_RANDOM - w32 compat for random
97 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
98 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
99 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
100 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
101 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
102 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
103 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
104 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
105 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
106 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
107 # ACX_CHECK_PIE - add --enable-pie option and check if works
108 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
111 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
112 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
113 dnl $1: the text to change.
115 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
118 dnl Calculate comma separated windows-resource numbers from package version.
119 dnl Picks the first three(,0) or four numbers out of the name.
120 dnl $1: variable for the result
121 AC_DEFUN([ACX_RSRC_VERSION],
122 [$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/' `]
125 dnl Routine to help check for compiler flags.
126 dnl Checks if the compiler will accept the flag.
127 dnl $1: the flag without a - in front, so g to check -g.
128 dnl $2: executed if yes
129 dnl $3: executed if no
130 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
132 AC_REQUIRE([AC_PROG_CC])
133 AC_MSG_CHECKING(whether $CC supports -$1)
134 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
135 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
137 echo 'void f(void){}' >conftest.c
138 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
139 eval "cv_prog_cc_flag_$cache=yes"
141 eval "cv_prog_cc_flag_$cache=no"
143 rm -f conftest conftest.o conftest.c
145 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
156 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
157 dnl ERRFLAG: result, compiler flag to turn warnings into errors
158 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
160 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
161 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
162 [ERRFLAG="$ERRFLAG -errfmt"])
165 dnl Routine to help check for needed compiler flags.
167 dnl $2: the includes and code
168 dnl $3: if the given code only compiles with the flag, execute argument 3
169 dnl $4: if the given code compiles without the flag, execute argument 4
170 dnl $5: with and without flag the compile fails, execute argument 5.
171 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
173 AC_REQUIRE([AC_PROG_CC])
174 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
175 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
177 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
178 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
180 echo '$2' > conftest.c
181 echo 'void f(){}' >>conftest.c
182 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
183 eval "cv_prog_cc_flag_needed_$cache=no"
186 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
187 eval "cv_prog_cc_flag_needed_$cache=yes"
189 eval "cv_prog_cc_flag_needed_$cache=fail"
190 #echo 'Test with flag fails too!'
192 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
193 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
198 rm -f conftest conftest.c conftest.o
200 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
205 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
207 #echo 'Test with flag is no!'
209 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
210 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
215 AC_MSG_RESULT(failed)
222 dnl Check for CC dependency flag
223 dnl DEPFLAG: set to flag that generates dependencies.
224 AC_DEFUN([ACX_DEPFLAG],
226 AC_MSG_CHECKING([$CC dependency flag])
227 echo 'void f(){}' >conftest.c
228 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
231 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
234 DEPFLAG="-MM" # dunno do something
237 AC_MSG_RESULT($DEPFLAG)
242 dnl Determine flags that gives POSIX and BSD functionality.
243 dnl CFLAGS is modified for the result.
244 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
246 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
247 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
249 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
251 ACX_CHECK_COMPILER_FLAG_NEEDED($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,
253 #include "confdefs.h"
256 #include <sys/time.h>
273 const char* str = NULL;
276 t = ctime_r(&time, buf);
279 a = getopt(2, opts, "a");
281 str = gai_strerror(0);
282 if(str && t && tv.tv_usec && msg.msg_control)
286 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
288 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
290 #include "confdefs.h"
293 #include <sys/time.h>
310 const char* str = NULL;
313 t = ctime_r(&time, buf);
316 a = getopt(2, opts, "a");
318 str = gai_strerror(0);
319 if(str && t && tv.tv_usec && msg.msg_control)
323 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
325 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
333 ], [CFLAGS="$CFLAGS $C99FLAG"])
335 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
344 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
346 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
348 #include <netinet/in.h>
351 struct in6_pktinfo inf;
352 int a = (int)sizeof(inf);
355 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
357 # check again for GNU_SOURCE for setresgid. May fail if setresgid
358 # is not available at all. -D_FRSRESGID is to make this check unique.
359 # otherwise we would get the previous cached result.
360 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
365 int a = setresgid(0,0,0);
366 a = setresuid(0,0,0);
369 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
371 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
373 #include "confdefs.h"
384 const char* str = NULL;
385 t = ctime_r(&time, buf);
386 str = gai_strerror(0);
391 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
393 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
395 #include "confdefs.h"
398 #include <sys/time.h>
413 a = getopt(2, opts, "a");
419 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
421 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
423 dnl Check if CC supports -flto.
424 dnl in a way that supports clang and suncc (that flag does something else,
425 dnl but fails to link). It sets it in CFLAGS if it works.
426 AC_DEFUN([ACX_CHECK_FLTO], [
427 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
428 AS_IF([test "x$enable_flto" != "xno"], [
429 AC_MSG_CHECKING([if $CC supports -flto])
431 CFLAGS="$CFLAGS -flto"
432 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
433 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
439 rm -f conftest conftest.c conftest.o
440 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
444 dnl Check the printf-format attribute (if any)
445 dnl result in HAVE_ATTR_FORMAT.
446 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
447 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
448 [AC_REQUIRE([AC_PROG_CC])
449 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
450 AC_CACHE_VAL(ac_cv_c_format_attribute,
451 [ac_cv_c_format_attribute=no
452 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
453 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
454 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
457 ]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"])
460 AC_MSG_RESULT($ac_cv_c_format_attribute)
461 if test $ac_cv_c_format_attribute = yes; then
462 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
464 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
466 dnl Setup ATTR_FORMAT config.h parts.
467 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
468 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
470 #ifdef HAVE_ATTR_FORMAT
471 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
472 __attribute__ ((format (archetype, string_index, first_to_check)))
473 #else /* !HAVE_ATTR_FORMAT */
474 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
475 #endif /* !HAVE_ATTR_FORMAT */
478 dnl Check how to mark function arguments as unused.
479 dnl result in HAVE_ATTR_UNUSED.
480 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
481 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
482 [AC_REQUIRE([AC_PROG_CC])
483 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
484 AC_CACHE_VAL(ac_cv_c_unused_attribute,
485 [ac_cv_c_unused_attribute=no
486 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
487 void f (char *u __attribute__((unused)));
490 ]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"])
493 dnl Setup ATTR_UNUSED config.h parts.
494 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
495 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
498 # define ATTR_UNUSED(x) x
499 #elif defined(__cplusplus)
500 # define ATTR_UNUSED(x)
501 #elif defined(HAVE_ATTR_UNUSED)
502 # define ATTR_UNUSED(x) x __attribute__((unused))
503 #else /* !HAVE_ATTR_UNUSED */
504 # define ATTR_UNUSED(x) x
505 #endif /* !HAVE_ATTR_UNUSED */
508 AC_MSG_RESULT($ac_cv_c_unused_attribute)
509 if test $ac_cv_c_unused_attribute = yes; then
510 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
514 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
515 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
516 # skip these tests, we do not need them.
517 AC_DEFUN([AC_PROG_F77], [:])
518 AC_DEFUN([AC_PROG_FC], [:])
519 AC_DEFUN([AC_PROG_CXX], [:])
520 AC_DEFUN([AC_PROG_CXXCPP], [:])
521 AC_DEFUN([AC_PROG_OBJC], [:])
522 AC_DEFUN([AC_PROG_OBJCCPP], [:])
523 AC_DEFUN([AC_LIBTOOL_CXX], [:])
524 AC_DEFUN([AC_LIBTOOL_F77], [:])
525 # always use ./libtool unless override from commandline (libtool=mylibtool)
526 if test -z "$libtool"; then
530 # avoid libtool max commandline length test on systems that fork slowly.
532 if echo "$host_os" | grep "sunos4" >/dev/null; then
533 lt_cv_sys_max_cmd_len=32750;
535 AC_PATH_TOOL(AR, ar, [false])
536 if test $AR = false; then
537 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
541 dnl Perform libtool check, portably, only for C
542 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
543 dnl as a requirement so that is gets called before LIBTOOL
544 dnl because libtools 'AC_REQUIRE' names are right after this one, before
545 dnl this function contents.
546 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
550 dnl Detect if u_char type is defined, otherwise define it.
551 AC_DEFUN([ACX_TYPE_U_CHAR],
552 [AC_CHECK_TYPE([u_char], ,
553 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
555 #ifdef HAVE_WINSOCK2_H
556 # include <winsock2.h>
560 dnl Detect if rlim_t type is defined, otherwise define it.
561 AC_DEFUN([ACX_TYPE_RLIM_T],
562 [AC_CHECK_TYPE(rlim_t, ,
563 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
565 #ifdef HAVE_SYS_RESOURCE_H
566 # include <sys/resource.h>
570 dnl Detect if socklen_t type is defined, otherwise define it.
571 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
573 AC_CHECK_TYPE(socklen_t, ,
574 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
576 #ifdef HAVE_SYS_SOCKET_H
577 # include <sys/socket.h>
579 #ifdef HAVE_WS2TCPIP_H
580 # include <ws2tcpip.h>
584 dnl Detect if in_addr_t type is defined, otherwise define it.
585 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
586 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
588 #ifdef HAVE_SYS_TYPES_H
589 # include <sys/types.h>
591 #ifdef HAVE_NETINET_IN_H
592 # include <netinet/in.h>
596 dnl Detect if in_port_t type is defined, otherwise define it.
597 AC_DEFUN([ACX_TYPE_IN_PORT_T],
598 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
600 #ifdef HAVE_SYS_TYPES_H
601 # include <sys/types.h>
603 #ifdef HAVE_NETINET_IN_H
604 # include <netinet/in.h>
608 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
609 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
610 AC_DEFUN([ACX_ARG_RPATH],
613 [ --disable-rpath disable hardcoded rpath (default=enabled)],
614 enable_rpath=$enableval, enable_rpath=yes)
615 if test "x$enable_rpath" = xno; then
616 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
617 AC_CONFIG_COMMANDS([disable-rpath], [
618 sed < libtool > libtool-2 \
619 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
627 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
628 dnl an absolute path.
629 dnl $1: the pathname to add.
630 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
631 if test "x$enable_rpath" = xyes; then
632 if echo "$1" | grep "^/" >/dev/null; then
633 RUNTIME_PATH="$RUNTIME_PATH -R$1"
638 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
639 dnl Takes one argument; the withval checked in those 2 functions
640 dnl sets up the environment for the given openssl path
641 AC_DEFUN([ACX_SSL_CHECKS], [
643 if test x_$withval != x_no; then
644 AC_MSG_CHECKING(for SSL)
645 if test x_$withval = x_ -o x_$withval = x_yes; then
646 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
648 for dir in $withval; do
650 if test -f "$dir/include/openssl/ssl.h"; then
652 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
653 dnl assume /usr/include is already in the include-path.
654 if test "$ssldir" != "/usr"; then
655 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
656 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
661 if test x_$found_ssl != x_yes; then
662 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
664 AC_MSG_RESULT(found in $ssldir)
666 dnl assume /usr is already in the lib and dynlib paths.
667 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
668 LDFLAGS="$LDFLAGS -L$ssldir/lib"
669 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
670 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
673 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto])
674 LIBS="$LIBS -lcrypto"
675 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
676 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
677 int EVP_sha256(void);
681 AC_DEFINE([HAVE_EVP_SHA256], 1,
682 [If you have EVP_sha256])
685 # check if -lwsock32 or -lgdi32 are needed.
687 BAKSSLLIBS="$LIBSSL_LIBS"
688 LIBS="$LIBS -lgdi32 -lws2_32"
689 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32"
690 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
691 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
692 int EVP_sha256(void);
695 AC_DEFINE([HAVE_EVP_SHA256], 1,
696 [If you have EVP_sha256])
701 LIBSSL_LIBS="$BAKSSLLIBS"
703 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
704 AC_MSG_CHECKING([if -lcrypto needs -ldl])
705 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
706 int EVP_sha256(void);
709 AC_DEFINE([HAVE_EVP_SHA256], 1,
710 [If you have EVP_sha256])
715 LIBSSL_LIBS="$BAKSSLLIBS"
716 LIBS="$LIBS -ldl -pthread"
717 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
718 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread])
719 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
720 int EVP_sha256(void);
723 AC_DEFINE([HAVE_EVP_SHA256], 1,
724 [If you have EVP_sha256])
728 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
735 AC_SUBST(RUNTIME_PATH)
737 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
738 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
739 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
740 ])dnl End of ACX_SSL_CHECKS
742 dnl Check for SSL, where SSL is mandatory
743 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
744 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
745 dnl Checks main header files of SSL.
747 AC_DEFUN([ACX_WITH_SSL],
749 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
750 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
754 if test x_$withval = x_no; then
755 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
757 ACX_SSL_CHECKS($withval)
758 ])dnl End of ACX_WITH_SSL
760 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
761 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
762 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
763 dnl Checks main header files of SSL.
765 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
767 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
768 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
772 ACX_SSL_CHECKS($withval)
773 ])dnl End of ACX_WITH_SSL_OPTIONAL
775 dnl Setup to use -lssl
776 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
777 AC_DEFUN([ACX_LIB_SSL],
779 # check if libssl needs libdl
782 AC_MSG_CHECKING([if libssl needs libdl])
783 AC_TRY_LINK_FUNC([SSL_CTX_new], [
789 AC_SEARCH_LIBS([dlopen], [dl])
790 ]) ])dnl End of ACX_LIB_SSL
792 dnl Setup to use very large files (>2Gb).
793 dnl setups fseeko and its own
794 AC_DEFUN([ACX_SYS_LARGEFILE],
797 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
798 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
802 int a = fseeko(stdin, 0, 0);
805 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
808 dnl Check getaddrinfo.
809 dnl Works on linux, solaris, bsd and windows(links winsock).
810 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
811 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
812 [AC_REQUIRE([AC_PROG_CC])
813 AC_MSG_CHECKING(for getaddrinfo)
814 ac_cv_func_getaddrinfo=no
822 char* (*f) () = getaddrinfo;
831 dnl this case on linux, solaris, bsd
832 [ac_cv_func_getaddrinfo="yes"
833 dnl see if on windows
834 if test "$ac_cv_header_windows_h" = "yes"; then
835 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
837 if echo $LIBS | grep 'lws2_32' >/dev/null; then
840 LIBS="$LIBS -lws2_32"
844 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
846 LIBS="$LIBS -lws2_32"
850 #ifdef HAVE_WS2TCPIP_H
851 #include <ws2tcpip.h>
855 (void)getaddrinfo(NULL, NULL, NULL, NULL);
859 ac_cv_func_getaddrinfo="yes"
860 dnl already: LIBS="$LIBS -lws2_32"
861 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
865 ac_cv_func_getaddrinfo="no"
870 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
871 if test $ac_cv_func_getaddrinfo = yes; then
872 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
874 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
876 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
877 dnl $1: function name
878 dnl $2: C-statement that calls the function.
879 dnl $3: includes for the program.
880 dnl $4: executes if yes
881 dnl $5: executes if no
882 AC_DEFUN([ACX_FUNC_DEPRECATED],
884 AC_REQUIRE([AC_PROG_CC])
885 AC_MSG_CHECKING(if $1 is deprecated)
886 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
887 AC_CACHE_VAL(cv_cc_deprecated_$cache,
889 echo '$3' >conftest.c
890 echo 'void f(){ $2 }' >>conftest.c
891 if test -z "`$CC -c conftest.c 2>&1 | grep deprecated`"; then
892 eval "cv_cc_deprecated_$cache=no"
894 eval "cv_cc_deprecated_$cache=yes"
896 rm -f conftest conftest.o conftest.c
898 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
900 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
908 ])dnl end of ACX_FUNC_DEPRECATED
910 dnl check if select and nonblocking sockets actually work.
911 dnl Needs fork(2) and select(2).
912 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
913 dnl a nonblocking socket do not work, a new call to select is necessary.
914 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
916 AC_MSG_CHECKING([if nonblocking sockets work])
917 if echo $target | grep mingw32 >/dev/null; then
918 AC_MSG_RESULT([no (windows)])
919 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
928 #ifdef HAVE_SYS_TYPES_H
929 #include <sys/types.h>
931 #ifdef HAVE_SYS_SOCKET_H
932 #include <sys/socket.h>
934 #ifdef HAVE_NETINET_IN_H
935 #include <netinet/in.h>
937 #ifdef HAVE_ARPA_INET_H
938 #include <arpa/inet.h>
953 struct sockaddr_in a;
954 /* test if select and nonblocking reads work well together */
956 fork child to send 10 messages.
958 then try to nonblocking read the 10 messages
959 then, nonblocking read must give EAGAIN
962 port = 12345 + (time(0)%32);
963 sfd = socket(PF_INET, SOCK_DGRAM, 0);
968 memset(&a, 0, sizeof(a));
969 a.sin_family = AF_INET;
970 a.sin_port = htons(port);
971 a.sin_addr.s_addr = inet_addr("127.0.0.1");
972 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
976 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
981 cfd = socket(PF_INET, SOCK_DGRAM, 0);
983 perror("client socket");
987 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
988 perror("client bind");
991 a.sin_port = htons(port);
993 /* no handler, causes exit in 10 seconds */
996 /* send and receive on the socket */
997 if((p=fork()) == 0) {
998 for(i=0; i<num; i++) {
999 if(sendto(cfd, &i, sizeof(i), 0,
1000 (struct sockaddr*)&a, sizeof(a)) < 0) {
1015 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1021 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1029 /* now we want to get EAGAIN: nonblocking goodness */
1031 recv(sfd, &x, sizeof(x), 0);
1032 if(errno != EAGAIN) {
1033 perror("trying to recv again");
1036 /* EAGAIN encountered */
1044 AC_MSG_RESULT([yes])
1047 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1049 AC_MSG_RESULT([crosscompile(yes)])
1052 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1054 dnl Check if mkdir has one or two arguments.
1055 dnl defines MKDIR_HAS_ONE_ARG
1056 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1058 AC_MSG_CHECKING([whether mkdir has one arg])
1059 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1062 #ifdef HAVE_WINSOCK2_H
1063 #include <winsock2.h>
1065 #ifdef HAVE_SYS_STAT_H
1066 #include <sys/stat.h>
1069 (void)mkdir("directory");
1070 ]])],[AC_MSG_RESULT(yes)
1071 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1072 ],[AC_MSG_RESULT(no)
1074 ])dnl end of ACX_MKDIR_ONE_ARG
1076 dnl Check for ioctlsocket function. works on mingw32 too.
1077 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1080 AC_MSG_CHECKING(for ioctlsocket)
1081 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1082 #ifdef HAVE_WINSOCK2_H
1083 #include <winsock2.h>
1086 (void)ioctlsocket(0, 0, NULL);
1089 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1090 ],[AC_MSG_RESULT(no)])
1091 ])dnl end of ACX_FUNC_IOCTLSOCKET
1093 dnl detect malloc and provide malloc compat prototype.
1094 dnl $1: unique name for compat code
1095 AC_DEFUN([ACX_FUNC_MALLOC],
1097 AC_MSG_CHECKING([for GNU libc compatible malloc])
1098 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1099 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1104 ]], [ if(malloc(0) != 0) return 1;])
1106 [AC_MSG_RESULT([no])
1108 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1109 [AC_MSG_RESULT([yes])
1110 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1111 [AC_MSG_RESULT([no (crosscompile)])
1113 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1116 dnl Define fallback for fseeko and ftello if needed.
1117 AC_DEFUN([AHX_CONFIG_FSEEKO],
1120 #define fseeko fseek
1121 #define ftello ftell
1122 #endif /* HAVE_FSEEKO */
1125 dnl Define RAND_MAX if not defined
1126 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1129 #define RAND_MAX 2147483647
1133 dnl Define MAXHOSTNAMELEN if not defined
1134 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1136 #ifndef MAXHOSTNAMELEN
1137 #define MAXHOSTNAMELEN 256
1141 dnl Define IPV6_MIN_MTU if not defined
1142 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1144 #ifndef IPV6_MIN_MTU
1145 #define IPV6_MIN_MTU 1280
1146 #endif /* IPV6_MIN_MTU */
1149 dnl provide snprintf, vsnprintf compat prototype
1150 dnl $1: unique name for compat code
1151 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1153 #ifndef HAVE_SNPRINTF
1154 #define snprintf snprintf_$1
1155 #define vsnprintf vsnprintf_$1
1157 int snprintf (char *str, size_t count, const char *fmt, ...);
1158 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1159 #endif /* HAVE_SNPRINTF */
1162 dnl provide inet_pton compat prototype.
1163 dnl $1: unique name for compat code
1164 AC_DEFUN([AHX_CONFIG_INET_PTON],
1166 #ifndef HAVE_INET_PTON
1167 #define inet_pton inet_pton_$1
1168 int inet_pton(int af, const char* src, void* dst);
1169 #endif /* HAVE_INET_PTON */
1172 dnl provide inet_ntop compat prototype.
1173 dnl $1: unique name for compat code
1174 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1176 #ifndef HAVE_INET_NTOP
1177 #define inet_ntop inet_ntop_$1
1178 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1182 dnl provide inet_aton compat prototype.
1183 dnl $1: unique name for compat code
1184 AC_DEFUN([AHX_CONFIG_INET_ATON],
1186 #ifndef HAVE_INET_ATON
1187 #define inet_aton inet_aton_$1
1188 int inet_aton(const char *cp, struct in_addr *addr);
1192 dnl provide memmove compat prototype.
1193 dnl $1: unique name for compat code
1194 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1196 #ifndef HAVE_MEMMOVE
1197 #define memmove memmove_$1
1198 void *memmove(void *dest, const void *src, size_t n);
1202 dnl provide strlcat compat prototype.
1203 dnl $1: unique name for compat code
1204 AC_DEFUN([AHX_CONFIG_STRLCAT],
1206 #ifndef HAVE_STRLCAT
1207 #define strlcat strlcat_$1
1208 size_t strlcat(char *dst, const char *src, size_t siz);
1212 dnl provide strlcpy compat prototype.
1213 dnl $1: unique name for compat code
1214 AC_DEFUN([AHX_CONFIG_STRLCPY],
1216 #ifndef HAVE_STRLCPY
1217 #define strlcpy strlcpy_$1
1218 size_t strlcpy(char *dst, const char *src, size_t siz);
1222 dnl provide gmtime_r compat prototype.
1223 dnl $1: unique name for compat code
1224 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1226 #ifndef HAVE_GMTIME_R
1227 #define gmtime_r gmtime_r_$1
1228 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1232 dnl provide reallocarray compat prototype.
1233 dnl $1: unique name for compat code
1234 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1236 #ifndef HAVE_REALLOCARRAY
1237 #define reallocarray reallocarray$1
1238 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1242 dnl provide w32 compat definition for sleep
1243 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1245 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1246 #define sleep(x) Sleep((x)*1000) /* on win32 */
1247 #endif /* HAVE_SLEEP */
1250 dnl provide w32 compat definition for usleep
1251 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1254 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1255 #endif /* HAVE_USLEEP */
1258 dnl provide w32 compat definition for random
1259 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1262 #define random rand /* on win32, for tests only (bad random) */
1263 #endif /* HAVE_RANDOM */
1266 dnl provide w32 compat definition for srandom
1267 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1269 #ifndef HAVE_SRANDOM
1270 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1271 #endif /* HAVE_SRANDOM */
1274 dnl provide w32 compat definition for FD_SET_T
1275 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1277 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1278 #ifdef HAVE_WINSOCK2_H
1279 #define FD_SET_T (u_int)
1285 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1286 dnl Used by ACX_STRIP_EXT_FLAGS.
1287 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1288 AC_DEFUN([ACX_CFLAGS_STRIP],
1290 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1291 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1292 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1296 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1297 dnl use with ACX_DETERMINE_EXT_FLAGS.
1298 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1300 AC_MSG_NOTICE([Stripping extension flags...])
1301 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1302 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1303 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
1304 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1305 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1306 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1307 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1308 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1309 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1310 ]) dnl End of ACX_STRIP_EXT_FLAGS
1312 dnl define one omitted flag for config.h
1313 dnl $1: flag name. -D_GNU_SOURCE
1314 dnl $2: replacement define. _GNU_SOURCE
1315 dnl $3: define value, 1
1316 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1317 [#if defined($1) && !defined($2)
1321 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1322 dnl $1: the -DNAME or -DNAME=value string.
1323 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1324 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1327 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1328 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1329 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1330 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1331 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
1332 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1333 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1334 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1335 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1336 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1337 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1340 dnl check if memcmp is using signed characters and replace if so.
1341 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1342 [AC_MSG_CHECKING([if memcmp compares unsigned])
1343 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1349 char a = 255, b = 0;
1350 if(memcmp(&a, &b, 1) < 0)
1354 ]])], [AC_MSG_RESULT([yes]) ],
1355 [ AC_MSG_RESULT([no])
1356 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1358 ], [ AC_MSG_RESULT([cross-compile no])
1359 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1363 dnl define memcmp to its replacement, pass unique id for program as arg
1364 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1365 #ifdef MEMCMP_IS_BROKEN
1366 #include "compat/memcmp.h"
1367 #define memcmp memcmp_$1
1368 int memcmp(const void *x, const void *y, size_t n);
1372 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1373 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1374 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1375 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1376 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1377 ],, [AC_INCLUDES_DEFAULT
1378 #ifdef HAVE_NETINET_IN_H
1379 #include <netinet/in.h>
1381 #ifdef HAVE_SYS_SOCKET_H
1382 #include <sys/socket.h>
1387 #ifdef HAVE_ARPA_INET_H
1388 #include <arpa/inet.h>
1391 ], [AC_INCLUDES_DEFAULT
1392 #ifdef HAVE_NETINET_IN_H
1393 #include <netinet/in.h>
1395 #ifdef HAVE_SYS_SOCKET_H
1396 #include <sys/socket.h>
1401 #ifdef HAVE_ARPA_INET_H
1402 #include <arpa/inet.h>
1406 dnl Check if CC and linker support -fPIE and -pie.
1407 dnl If so, sets them in CFLAGS / LDFLAGS.
1408 AC_DEFUN([ACX_CHECK_PIE], [
1409 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1410 AS_IF([test "x$enable_pie" = "xyes"], [
1411 AC_MSG_CHECKING([if $CC supports PIE])
1412 BAKLDFLAGS="$LDFLAGS"
1414 LDFLAGS="$LDFLAGS -pie"
1415 CFLAGS="$CFLAGS -fPIE"
1416 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1417 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1418 LDFLAGS="$BAKLDFLAGS"
1423 rm -f conftest conftest.c conftest.o
1424 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1428 dnl Check if linker supports -Wl,-z,relro,-z,now.
1429 dnl If so, adds it to LDFLAGS.
1430 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1431 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)]))
1432 AS_IF([test "x$enable_relro_now" = "xyes"], [
1433 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1434 BAKLDFLAGS="$LDFLAGS"
1435 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1436 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1437 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1438 LDFLAGS="$BAKLDFLAGS"
1443 rm -f conftest conftest.c conftest.o
1444 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])