1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0.
7 # 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0).
8 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
9 # 2015-12-11 FLTO check for new OSX, clang.
10 # 2015-11-18 spelling check fix.
11 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
12 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
13 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
14 # 2013-09-19 FLTO help text improved.
15 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
16 # 2013-06-25 FLTO has --disable-flto option.
17 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
18 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
19 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
20 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
21 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
22 # Fix ACX_MALLOC for redefined malloc error.
23 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
24 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
25 # 2011-11-01 Fix FLTO test for llvm on Lion.
26 # 2011-08-01 Fix nonblock test (broken at v13).
27 # 2011-08-01 Fix autoconf 2.68 warnings
28 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
29 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
30 # 2010-07-02 Add check for ss_family (for minix).
31 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
32 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
33 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
34 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
35 # 2010-01-20 added AHX_COONFIG_STRLCAT
36 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
37 # added ACX_FUNC_MALLOC
38 # fixup some #if to #ifdef
39 # NONBLOCKING test for mingw crosscompile.
40 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
41 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
43 # Automates some of the checking constructs. Aims at portability for POSIX.
44 # Documentation for functions is below.
46 # the following macro's are provided in this file:
47 # (see below for details on each macro).
49 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
50 # ACX_RSRC_VERSION - create windows resource version number.
51 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
52 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
53 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
54 # ACX_DEPFLAG - find cc dependency flags.
55 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
56 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
57 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
58 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
59 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
60 # ACX_TYPE_U_CHAR - u_char type.
61 # ACX_TYPE_RLIM_T - rlim_t type.
62 # ACX_TYPE_SOCKLEN_T - socklen_t type.
63 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
64 # ACX_TYPE_IN_PORT_T - in_port_t type.
65 # ACX_ARG_RPATH - add --disable-rpath option.
66 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
67 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
68 # where --without-ssl is also accepted
69 # ACX_LIB_SSL - setup to link -lssl.
70 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
71 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
72 # ACX_FUNC_DEPRECATED - see if func is deprecated.
73 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
74 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
75 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
76 # ACX_FUNC_MALLOC - check malloc, define replacement .
77 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
78 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
79 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
80 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
81 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
82 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
83 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
84 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
85 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
86 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
87 # AHX_CONFIG_MEMMOVE - memmove compat prototype
88 # AHX_CONFIG_STRLCAT - strlcat compat prototype
89 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
90 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
91 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
92 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
93 # AHX_CONFIG_W32_RANDOM - w32 compat for random
94 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
95 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
96 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
97 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
98 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
99 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
100 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
101 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
102 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
103 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
104 # ACX_CHECK_PIE - add --enable-pie option and check if works
105 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
108 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
109 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
110 dnl $1: the text to change.
112 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
115 dnl Calculate comma separated windows-resource numbers from package version.
116 dnl Picks the first three(,0) or four numbers out of the name.
117 dnl $1: variable for the result
118 AC_DEFUN([ACX_RSRC_VERSION],
119 [$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/' `]
122 dnl Routine to help check for compiler flags.
123 dnl Checks if the compiler will accept the flag.
124 dnl $1: the flag without a - in front, so g to check -g.
125 dnl $2: executed if yes
126 dnl $3: executed if no
127 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
129 AC_REQUIRE([AC_PROG_CC])
130 AC_MSG_CHECKING(whether $CC supports -$1)
131 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
132 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
134 echo 'void f(void){}' >conftest.c
135 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
136 eval "cv_prog_cc_flag_$cache=yes"
138 eval "cv_prog_cc_flag_$cache=no"
140 rm -f conftest conftest.o conftest.c
142 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
153 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
154 dnl ERRFLAG: result, compiler flag to turn warnings into errors
155 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
157 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
158 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
159 [ERRFLAG="$ERRFLAG -errfmt"])
162 dnl Routine to help check for needed compiler flags.
164 dnl $2: the includes and code
165 dnl $3: if the given code only compiles with the flag, execute argument 3
166 dnl $4: if the given code compiles without the flag, execute argument 4
167 dnl $5: with and without flag the compile fails, execute argument 5.
168 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
170 AC_REQUIRE([AC_PROG_CC])
171 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
172 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
174 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
175 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
177 echo '$2' > conftest.c
178 echo 'void f(){}' >>conftest.c
179 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
180 eval "cv_prog_cc_flag_needed_$cache=no"
183 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
184 eval "cv_prog_cc_flag_needed_$cache=yes"
186 eval "cv_prog_cc_flag_needed_$cache=fail"
187 #echo 'Test with flag fails too!'
189 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
190 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
195 rm -f conftest conftest.c conftest.o
197 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
202 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
204 #echo 'Test with flag is no!'
206 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
207 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
212 AC_MSG_RESULT(failed)
219 dnl Check for CC dependency flag
220 dnl DEPFLAG: set to flag that generates dependencies.
221 AC_DEFUN([ACX_DEPFLAG],
223 AC_MSG_CHECKING([$CC dependency flag])
224 echo 'void f(){}' >conftest.c
225 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
228 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
231 DEPFLAG="-MM" # dunno do something
234 AC_MSG_RESULT($DEPFLAG)
239 dnl Determine flags that gives POSIX and BSD functionality.
240 dnl CFLAGS is modified for the result.
241 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
243 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
244 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
246 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
248 ACX_CHECK_COMPILER_FLAG_NEEDED($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,
250 #include "confdefs.h"
253 #include <sys/time.h>
270 const char* str = NULL;
273 t = ctime_r(&time, buf);
276 a = getopt(2, opts, "a");
278 str = gai_strerror(0);
279 if(str && t && tv.tv_usec && msg.msg_control)
283 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
285 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
287 #include "confdefs.h"
290 #include <sys/time.h>
307 const char* str = NULL;
310 t = ctime_r(&time, buf);
313 a = getopt(2, opts, "a");
315 str = gai_strerror(0);
316 if(str && t && tv.tv_usec && msg.msg_control)
320 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
322 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
330 ], [CFLAGS="$CFLAGS $C99FLAG"])
332 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
341 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
343 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
345 #include <netinet/in.h>
348 struct in6_pktinfo inf;
349 int a = (int)sizeof(inf);
352 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
354 # check again for GNU_SOURCE for setresgid. May fail if setresgid
355 # is not available at all. -D_FRSRESGID is to make this check unique.
356 # otherwise we would get the previous cached result.
357 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
362 int a = setresgid(0,0,0);
363 a = setresuid(0,0,0);
366 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
368 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
370 #include "confdefs.h"
381 const char* str = NULL;
382 t = ctime_r(&time, buf);
383 str = gai_strerror(0);
388 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
390 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
392 #include "confdefs.h"
395 #include <sys/time.h>
410 a = getopt(2, opts, "a");
416 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
418 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
420 dnl Check if CC supports -flto.
421 dnl in a way that supports clang and suncc (that flag does something else,
422 dnl but fails to link). It sets it in CFLAGS if it works.
423 AC_DEFUN([ACX_CHECK_FLTO], [
424 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
425 AS_IF([test "x$enable_flto" != "xno"], [
426 AC_MSG_CHECKING([if $CC supports -flto])
428 CFLAGS="$CFLAGS -flto"
429 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
430 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
436 rm -f conftest conftest.c conftest.o
437 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
441 dnl Check the printf-format attribute (if any)
442 dnl result in HAVE_ATTR_FORMAT.
443 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
444 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
445 [AC_REQUIRE([AC_PROG_CC])
446 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
447 AC_CACHE_VAL(ac_cv_c_format_attribute,
448 [ac_cv_c_format_attribute=no
451 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
452 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
456 [ac_cv_c_format_attribute="yes"],
457 [ac_cv_c_format_attribute="no"])
460 AC_MSG_RESULT($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
488 void f (char *u __attribute__((unused)));
492 [ac_cv_c_unused_attribute="yes"],
493 [ac_cv_c_unused_attribute="no"])
496 dnl Setup ATTR_UNUSED config.h parts.
497 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
498 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
501 # define ATTR_UNUSED(x) x
502 #elif defined(__cplusplus)
503 # define ATTR_UNUSED(x)
504 #elif defined(HAVE_ATTR_UNUSED)
505 # define ATTR_UNUSED(x) x __attribute__((unused))
506 #else /* !HAVE_ATTR_UNUSED */
507 # define ATTR_UNUSED(x) x
508 #endif /* !HAVE_ATTR_UNUSED */
511 AC_MSG_RESULT($ac_cv_c_unused_attribute)
512 if test $ac_cv_c_unused_attribute = yes; then
513 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
517 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
518 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
519 # skip these tests, we do not need them.
520 AC_DEFUN([AC_PROG_F77], [:])
521 AC_DEFUN([AC_PROG_FC], [:])
522 AC_DEFUN([AC_PROG_CXX], [:])
523 AC_DEFUN([AC_PROG_CXXCPP], [:])
524 AC_DEFUN([AC_PROG_OBJC], [:])
525 AC_DEFUN([AC_PROG_OBJCCPP], [:])
526 AC_DEFUN([AC_LIBTOOL_CXX], [:])
527 AC_DEFUN([AC_LIBTOOL_F77], [:])
528 # always use ./libtool unless override from commandline (libtool=mylibtool)
529 if test -z "$libtool"; then
533 # avoid libtool max commandline length test on systems that fork slowly.
535 if echo "$host_os" | grep "sunos4" >/dev/null; then
536 lt_cv_sys_max_cmd_len=32750;
538 AC_PATH_TOOL(AR, ar, [false])
539 if test $AR = false; then
540 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
544 dnl Perform libtool check, portably, only for C
545 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
546 dnl as a requirement so that is gets called before LIBTOOL
547 dnl because libtools 'AC_REQUIRE' names are right after this one, before
548 dnl this function contents.
549 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
553 dnl Detect if u_char type is defined, otherwise define it.
554 AC_DEFUN([ACX_TYPE_U_CHAR],
555 [AC_CHECK_TYPE([u_char], ,
556 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
558 #ifdef HAVE_WINSOCK2_H
559 # include <winsock2.h>
563 dnl Detect if rlim_t type is defined, otherwise define it.
564 AC_DEFUN([ACX_TYPE_RLIM_T],
565 [AC_CHECK_TYPE(rlim_t, ,
566 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
568 #ifdef HAVE_SYS_RESOURCE_H
569 # include <sys/resource.h>
573 dnl Detect if socklen_t type is defined, otherwise define it.
574 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
576 AC_CHECK_TYPE(socklen_t, ,
577 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
579 #ifdef HAVE_SYS_SOCKET_H
580 # include <sys/socket.h>
582 #ifdef HAVE_WS2TCPIP_H
583 # include <ws2tcpip.h>
587 dnl Detect if in_addr_t type is defined, otherwise define it.
588 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
589 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
591 #ifdef HAVE_SYS_TYPES_H
592 # include <sys/types.h>
594 #ifdef HAVE_NETINET_IN_H
595 # include <netinet/in.h>
599 dnl Detect if in_port_t type is defined, otherwise define it.
600 AC_DEFUN([ACX_TYPE_IN_PORT_T],
601 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
603 #ifdef HAVE_SYS_TYPES_H
604 # include <sys/types.h>
606 #ifdef HAVE_NETINET_IN_H
607 # include <netinet/in.h>
611 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
612 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
613 AC_DEFUN([ACX_ARG_RPATH],
616 [ --disable-rpath disable hardcoded rpath (default=enabled)],
617 enable_rpath=$enableval, enable_rpath=yes)
618 if test "x$enable_rpath" = xno; then
619 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
620 AC_CONFIG_COMMANDS([disable-rpath], [
621 sed < libtool > libtool-2 \
622 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
630 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
631 dnl an absolute path.
632 dnl $1: the pathname to add.
633 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
634 if test "x$enable_rpath" = xyes; then
635 if echo "$1" | grep "^/" >/dev/null; then
636 RUNTIME_PATH="$RUNTIME_PATH -R$1"
641 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
642 dnl Takes one argument; the withval checked in those 2 functions
643 dnl sets up the environment for the given openssl path
644 AC_DEFUN([ACX_SSL_CHECKS], [
646 if test x_$withval != x_no; then
647 AC_MSG_CHECKING(for SSL)
648 if test x_$withval = x_ -o x_$withval = x_yes; then
649 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
651 for dir in $withval; do
653 if test -f "$dir/include/openssl/ssl.h"; then
655 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
656 dnl assume /usr/include is already in the include-path.
657 if test "$ssldir" != "/usr"; then
658 CPPFLAGS="$CPPFLAGS -I$ssldir/include"
659 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include"
664 if test x_$found_ssl != x_yes; then
665 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
667 AC_MSG_RESULT(found in $ssldir)
669 dnl assume /usr is already in the lib and dynlib paths.
670 if test "$ssldir" != "/usr" -a "$ssldir" != ""; then
671 LDFLAGS="$LDFLAGS -L$ssldir/lib"
672 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib"
673 ACX_RUNTIME_PATH_ADD([$ssldir/lib])
676 AC_MSG_CHECKING([for HMAC_Update in -lcrypto])
677 LIBS="$LIBS -lcrypto"
678 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
680 int HMAC_Update(void);
684 AC_DEFINE([HAVE_HMAC_UPDATE], 1,
685 [If you have HMAC_Update])
688 # check if -lwsock32 or -lgdi32 are needed.
690 BAKSSLLIBS="$LIBSSL_LIBS"
692 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32"
693 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
695 int HMAC_Update(void);
698 AC_DEFINE([HAVE_HMAC_UPDATE], 1,
699 [If you have HMAC_Update])
704 LIBSSL_LIBS="$BAKSSLLIBS"
706 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
707 AC_MSG_CHECKING([if -lcrypto needs -ldl])
709 int HMAC_Update(void);
712 AC_DEFINE([HAVE_HMAC_UPDATE], 1,
713 [If you have HMAC_Update])
718 LIBSSL_LIBS="$BAKSSLLIBS"
719 LIBS="$LIBS -ldl -pthread"
720 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
721 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread])
723 int HMAC_Update(void);
726 AC_DEFINE([HAVE_HMAC_UPDATE], 1,
727 [If you have HMAC_Update])
731 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
738 AC_SUBST(RUNTIME_PATH)
740 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
741 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
742 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
743 ])dnl End of ACX_SSL_CHECKS
745 dnl Check for SSL, where SSL is mandatory
746 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
747 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
748 dnl Checks main header files of SSL.
750 AC_DEFUN([ACX_WITH_SSL],
752 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
753 [enable SSL (will check /usr/local/ssl
754 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
758 if test x_$withval = x_no; then
759 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
761 ACX_SSL_CHECKS($withval)
762 ])dnl End of ACX_WITH_SSL
764 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
765 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
766 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
767 dnl Checks main header files of SSL.
769 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
771 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
772 [enable SSL (will check /usr/local/ssl
773 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[
777 ACX_SSL_CHECKS($withval)
778 ])dnl End of ACX_WITH_SSL_OPTIONAL
780 dnl Setup to use -lssl
781 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
782 AC_DEFUN([ACX_LIB_SSL],
784 # check if libssl needs libdl
787 AC_MSG_CHECKING([if libssl needs libdl])
788 AC_TRY_LINK_FUNC([SSL_CTX_new], [
794 AC_SEARCH_LIBS([dlopen], [dl])
795 ]) ])dnl End of ACX_LIB_SSL
797 dnl Setup to use very large files (>2Gb).
798 dnl setups fseeko and its own
799 AC_DEFUN([ACX_SYS_LARGEFILE],
802 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
803 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
807 int a = fseeko(stdin, 0, 0);
810 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
813 dnl Check getaddrinfo.
814 dnl Works on linux, solaris, bsd and windows(links winsock).
815 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
816 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
817 [AC_REQUIRE([AC_PROG_CC])
818 AC_MSG_CHECKING(for getaddrinfo)
819 ac_cv_func_getaddrinfo=no
827 char* (*f) () = getaddrinfo;
836 dnl this case on linux, solaris, bsd
837 [ac_cv_func_getaddrinfo="yes"
838 dnl see if on windows
839 if test "$ac_cv_header_windows_h" = "yes"; then
840 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
842 LIBS="$LIBS -lws2_32"
845 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
847 LIBS="$LIBS -lws2_32"
851 #ifdef HAVE_WS2TCPIP_H
852 #include <ws2tcpip.h>
856 (void)getaddrinfo(NULL, NULL, NULL, NULL);
860 ac_cv_func_getaddrinfo="yes"
861 dnl already: LIBS="$LIBS -lws2_32"
862 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
866 ac_cv_func_getaddrinfo="no"
871 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
872 if test $ac_cv_func_getaddrinfo = yes; then
873 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
875 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
877 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
878 dnl $1: function name
879 dnl $2: C-statement that calls the function.
880 dnl $3: includes for the program.
881 dnl $4: executes if yes
882 dnl $5: executes if no
883 AC_DEFUN([ACX_FUNC_DEPRECATED],
885 AC_REQUIRE([AC_PROG_CC])
886 AC_MSG_CHECKING(if $1 is deprecated)
887 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
888 AC_CACHE_VAL(cv_cc_deprecated_$cache,
890 echo '$3' >conftest.c
891 echo 'void f(){ $2 }' >>conftest.c
892 if test -z "`$CC -c conftest.c 2>&1 | grep deprecated`"; then
893 eval "cv_cc_deprecated_$cache=no"
895 eval "cv_cc_deprecated_$cache=yes"
897 rm -f conftest conftest.o conftest.c
899 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
901 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
909 ])dnl end of ACX_FUNC_DEPRECATED
911 dnl check if select and nonblocking sockets actually work.
912 dnl Needs fork(2) and select(2).
913 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
914 dnl a nonblocking socket do not work, a new call to select is necessary.
915 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
917 AC_MSG_CHECKING([if nonblocking sockets work])
918 if echo $target | grep mingw32 >/dev/null; then
919 AC_MSG_RESULT([no (windows)])
920 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
929 #ifdef HAVE_SYS_TYPES_H
930 #include <sys/types.h>
932 #ifdef HAVE_SYS_SOCKET_H
933 #include <sys/socket.h>
935 #ifdef HAVE_NETINET_IN_H
936 #include <netinet/in.h>
938 #ifdef HAVE_ARPA_INET_H
939 #include <arpa/inet.h>
954 struct sockaddr_in a;
955 /* test if select and nonblocking reads work well together */
957 fork child to send 10 messages.
959 then try to nonblocking read the 10 messages
960 then, nonblocking read must give EAGAIN
963 port = 12345 + (time(0)%32);
964 sfd = socket(PF_INET, SOCK_DGRAM, 0);
969 memset(&a, 0, sizeof(a));
970 a.sin_family = AF_INET;
971 a.sin_port = htons(port);
972 a.sin_addr.s_addr = inet_addr("127.0.0.1");
973 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
977 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
982 cfd = socket(PF_INET, SOCK_DGRAM, 0);
984 perror("client socket");
988 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
989 perror("client bind");
992 a.sin_port = htons(port);
994 /* no handler, causes exit in 10 seconds */
997 /* send and receive on the socket */
998 if((p=fork()) == 0) {
999 for(i=0; i<num; i++) {
1000 if(sendto(cfd, &i, sizeof(i), 0,
1001 (struct sockaddr*)&a, sizeof(a)) < 0) {
1016 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1022 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1030 /* now we want to get EAGAIN: nonblocking goodness */
1032 recv(sfd, &x, sizeof(x), 0);
1033 if(errno != EAGAIN) {
1034 perror("trying to recv again");
1037 /* EAGAIN encountered */
1045 AC_MSG_RESULT([yes])
1048 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1050 AC_MSG_RESULT([crosscompile(yes)])
1053 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1055 dnl Check if mkdir has one or two arguments.
1056 dnl defines MKDIR_HAS_ONE_ARG
1057 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1059 AC_MSG_CHECKING([whether mkdir has one arg])
1063 #ifdef HAVE_WINSOCK2_H
1064 #include <winsock2.h>
1066 #ifdef HAVE_SYS_STAT_H
1067 #include <sys/stat.h>
1070 (void)mkdir("directory");
1073 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1077 ])dnl end of ACX_MKDIR_ONE_ARG
1079 dnl Check for ioctlsocket function. works on mingw32 too.
1080 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1083 AC_MSG_CHECKING(for ioctlsocket)
1084 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1085 #ifdef HAVE_WINSOCK2_H
1086 #include <winsock2.h>
1089 (void)ioctlsocket(0, 0, NULL);
1092 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1093 ],[AC_MSG_RESULT(no)])
1094 ])dnl end of ACX_FUNC_IOCTLSOCKET
1096 dnl detect malloc and provide malloc compat prototype.
1097 dnl $1: unique name for compat code
1098 AC_DEFUN([ACX_FUNC_MALLOC],
1100 AC_MSG_CHECKING([for GNU libc compatible malloc])
1101 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1102 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1107 ]], [ if(malloc(0) != 0) return 1;])
1109 [AC_MSG_RESULT([no])
1111 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1112 [AC_MSG_RESULT([yes])
1113 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1114 [AC_MSG_RESULT([no (crosscompile)])
1116 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1119 dnl Define fallback for fseeko and ftello if needed.
1120 AC_DEFUN([AHX_CONFIG_FSEEKO],
1123 #define fseeko fseek
1124 #define ftello ftell
1125 #endif /* HAVE_FSEEKO */
1128 dnl Define RAND_MAX if not defined
1129 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1132 #define RAND_MAX 2147483647
1136 dnl Define MAXHOSTNAMELEN if not defined
1137 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1139 #ifndef MAXHOSTNAMELEN
1140 #define MAXHOSTNAMELEN 256
1144 dnl Define IPV6_MIN_MTU if not defined
1145 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1147 #ifndef IPV6_MIN_MTU
1148 #define IPV6_MIN_MTU 1280
1149 #endif /* IPV6_MIN_MTU */
1152 dnl provide snprintf, vsnprintf compat prototype
1153 dnl $1: unique name for compat code
1154 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1156 #ifndef HAVE_SNPRINTF
1157 #define snprintf snprintf_$1
1158 #define vsnprintf vsnprintf_$1
1160 int snprintf (char *str, size_t count, const char *fmt, ...);
1161 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1162 #endif /* HAVE_SNPRINTF */
1165 dnl provide inet_pton compat prototype.
1166 dnl $1: unique name for compat code
1167 AC_DEFUN([AHX_CONFIG_INET_PTON],
1169 #ifndef HAVE_INET_PTON
1170 #define inet_pton inet_pton_$1
1171 int inet_pton(int af, const char* src, void* dst);
1172 #endif /* HAVE_INET_PTON */
1175 dnl provide inet_ntop compat prototype.
1176 dnl $1: unique name for compat code
1177 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1179 #ifndef HAVE_INET_NTOP
1180 #define inet_ntop inet_ntop_$1
1181 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1185 dnl provide inet_aton compat prototype.
1186 dnl $1: unique name for compat code
1187 AC_DEFUN([AHX_CONFIG_INET_ATON],
1189 #ifndef HAVE_INET_ATON
1190 #define inet_aton inet_aton_$1
1191 int inet_aton(const char *cp, struct in_addr *addr);
1195 dnl provide memmove compat prototype.
1196 dnl $1: unique name for compat code
1197 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1199 #ifndef HAVE_MEMMOVE
1200 #define memmove memmove_$1
1201 void *memmove(void *dest, const void *src, size_t n);
1205 dnl provide strlcat compat prototype.
1206 dnl $1: unique name for compat code
1207 AC_DEFUN([AHX_CONFIG_STRLCAT],
1209 #ifndef HAVE_STRLCAT
1210 #define strlcat strlcat_$1
1211 size_t strlcat(char *dst, const char *src, size_t siz);
1215 dnl provide strlcpy compat prototype.
1216 dnl $1: unique name for compat code
1217 AC_DEFUN([AHX_CONFIG_STRLCPY],
1219 #ifndef HAVE_STRLCPY
1220 #define strlcpy strlcpy_$1
1221 size_t strlcpy(char *dst, const char *src, size_t siz);
1225 dnl provide gmtime_r compat prototype.
1226 dnl $1: unique name for compat code
1227 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1229 #ifndef HAVE_GMTIME_R
1230 #define gmtime_r gmtime_r_$1
1231 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1235 dnl provide reallocarray compat prototype.
1236 dnl $1: unique name for compat code
1237 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1239 #ifndef HAVE_REALLOCARRAY
1240 #define reallocarray reallocarray$1
1241 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1245 dnl provide w32 compat definition for sleep
1246 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1248 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1249 #define sleep(x) Sleep((x)*1000) /* on win32 */
1250 #endif /* HAVE_SLEEP */
1253 dnl provide w32 compat definition for usleep
1254 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1257 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1258 #endif /* HAVE_USLEEP */
1261 dnl provide w32 compat definition for random
1262 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1265 #define random rand /* on win32, for tests only (bad random) */
1266 #endif /* HAVE_RANDOM */
1269 dnl provide w32 compat definition for srandom
1270 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1272 #ifndef HAVE_SRANDOM
1273 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1274 #endif /* HAVE_SRANDOM */
1277 dnl provide w32 compat definition for FD_SET_T
1278 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1280 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1281 #ifdef HAVE_WINSOCK2_H
1282 #define FD_SET_T (u_int)
1288 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1289 dnl Used by ACX_STRIP_EXT_FLAGS.
1290 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1291 AC_DEFUN([ACX_CFLAGS_STRIP],
1293 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1294 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1295 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1299 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1300 dnl use with ACX_DETERMINE_EXT_FLAGS.
1301 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1303 AC_MSG_NOTICE([Stripping extension flags...])
1304 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1305 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1306 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
1307 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1308 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1309 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1310 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1311 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1312 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1313 ]) dnl End of ACX_STRIP_EXT_FLAGS
1315 dnl define one omitted flag for config.h
1316 dnl $1: flag name. -D_GNU_SOURCE
1317 dnl $2: replacement define. _GNU_SOURCE
1318 dnl $3: define value, 1
1319 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1320 [#if defined($1) && !defined($2)
1324 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1325 dnl $1: the -DNAME or -DNAME=value string.
1326 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1327 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1330 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1331 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1332 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1333 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1334 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
1335 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1336 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1337 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1338 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1339 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1340 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1343 dnl check if memcmp is using signed characters and replace if so.
1344 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1345 [AC_MSG_CHECKING([if memcmp compares unsigned])
1346 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1352 char a = 255, b = 0;
1353 if(memcmp(&a, &b, 1) < 0)
1357 ]])], [AC_MSG_RESULT([yes]) ],
1358 [ AC_MSG_RESULT([no])
1359 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1361 ], [ AC_MSG_RESULT([cross-compile no])
1362 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1366 dnl define memcmp to its replacement, pass unique id for program as arg
1367 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1368 #ifdef MEMCMP_IS_BROKEN
1369 #include "compat/memcmp.h"
1370 #define memcmp memcmp_$1
1371 int memcmp(const void *x, const void *y, size_t n);
1375 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1376 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1377 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1378 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1379 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1380 ],, [AC_INCLUDES_DEFAULT
1381 #ifdef HAVE_NETINET_IN_H
1382 #include <netinet/in.h>
1384 #ifdef HAVE_SYS_SOCKET_H
1385 #include <sys/socket.h>
1390 #ifdef HAVE_ARPA_INET_H
1391 #include <arpa/inet.h>
1394 ], [AC_INCLUDES_DEFAULT
1395 #ifdef HAVE_NETINET_IN_H
1396 #include <netinet/in.h>
1398 #ifdef HAVE_SYS_SOCKET_H
1399 #include <sys/socket.h>
1404 #ifdef HAVE_ARPA_INET_H
1405 #include <arpa/inet.h>
1409 dnl Check if CC and linker support -fPIE and -pie.
1410 dnl If so, sets them in CFLAGS / LDFLAGS.
1411 AC_DEFUN([ACX_CHECK_PIE], [
1412 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1413 AS_IF([test "x$enable_pie" = "xyes"], [
1414 AC_MSG_CHECKING([if $CC supports PIE])
1415 BAKLDFLAGS="$LDFLAGS"
1417 LDFLAGS="$LDFLAGS -pie"
1418 CFLAGS="$CFLAGS -fPIE"
1419 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1420 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1421 LDFLAGS="$BAKLDFLAGS"
1426 rm -f conftest conftest.c conftest.o
1427 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1431 dnl Check if linker supports -Wl,-z,relro,-z,now.
1432 dnl If so, adds it to LDFLAGS.
1433 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1434 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)]))
1435 AS_IF([test "x$enable_relro_now" = "xyes"], [
1436 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1437 BAKLDFLAGS="$LDFLAGS"
1438 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1439 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1440 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1441 LDFLAGS="$BAKLDFLAGS"
1446 rm -f conftest conftest.c conftest.o
1447 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])