1 # acx_nlnetlabs.m4 - common macros for configure checks
2 # Copyright 2009, Wouter Wijngaards, NLnet Labs.
6 # 2022-09-01 fix checking if nonblocking sockets work on OpenBSD.
7 # 2021-08-17 fix sed script in ssldir split handling.
8 # 2021-08-17 fix for openssl to detect split version, with ssldir_include
9 # and ssldir_lib output directories.
10 # 2021-07-30 fix for openssl use of lib64 directory.
11 # 2021-06-14 fix nonblocking test to use host instead of target for mingw test.
12 # 2021-05-17 fix nonblocking socket test from grep on mingw32 to mingw for
13 # 64bit compatibility.
14 # 2021-03-24 fix ACX_FUNC_DEPRECATED to use CPPFLAGS and CFLAGS.
15 # 2021-01-05 fix defun for aclocal
16 # 2021-01-05 autoconf 2.70 autoupdate and fixes, no AC_TRY_COMPILE
17 # 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0).
18 # 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0.
19 # 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0).
20 # 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
21 # 2015-12-11 FLTO check for new OSX, clang.
22 # 2015-11-18 spelling check fix.
23 # 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
24 # 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
25 # 2015-03-17 AHX_CONFIG_REALLOCARRAY added
26 # 2013-09-19 FLTO help text improved.
27 # 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
28 # 2013-06-25 FLTO has --disable-flto option.
29 # 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
30 # 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
31 # 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
32 # 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
33 # 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
34 # Fix ACX_MALLOC for redefined malloc error.
35 # Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
36 # 2011-11-10 Fix FLTO test to not drop a.out in current directory.
37 # 2011-11-01 Fix FLTO test for llvm on Lion.
38 # 2011-08-01 Fix nonblock test (broken at v13).
39 # 2011-08-01 Fix autoconf 2.68 warnings
40 # 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
41 # 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
42 # 2010-07-02 Add check for ss_family (for minix).
43 # 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
44 # 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
45 # 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
46 # 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
47 # 2010-01-20 added AHX_COONFIG_STRLCAT
48 # 2009-07-14 U_CHAR detection improved for windows crosscompile.
49 # added ACX_FUNC_MALLOC
50 # fixup some #if to #ifdef
51 # NONBLOCKING test for mingw crosscompile.
52 # 2009-07-13 added ACX_WITH_SSL_OPTIONAL
53 # 2009-07-03 fixup LDFLAGS for empty ssl dir.
55 # Automates some of the checking constructs. Aims at portability for POSIX.
56 # Documentation for functions is below.
58 # the following macro's are provided in this file:
59 # (see below for details on each macro).
61 # ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
62 # ACX_RSRC_VERSION - create windows resource version number.
63 # ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
64 # ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
65 # ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
66 # ACX_DEPFLAG - find cc dependency flags.
67 # ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
68 # ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
69 # ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
70 # ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
71 # ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
72 # ACX_TYPE_U_CHAR - u_char type.
73 # ACX_TYPE_RLIM_T - rlim_t type.
74 # ACX_TYPE_SOCKLEN_T - socklen_t type.
75 # ACX_TYPE_IN_ADDR_T - in_addr_t type.
76 # ACX_TYPE_IN_PORT_T - in_port_t type.
77 # ACX_ARG_RPATH - add --disable-rpath option.
78 # ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
79 # ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
80 # where --without-ssl is also accepted
81 # ACX_LIB_SSL - setup to link -lssl.
82 # ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
83 # ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
84 # ACX_FUNC_DEPRECATED - see if func is deprecated.
85 # ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
86 # ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
87 # ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
88 # ACX_FUNC_MALLOC - check malloc, define replacement .
89 # AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
90 # AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
91 # AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
92 # AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
93 # AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
94 # AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
95 # AHX_CONFIG_SNPRINTF - snprintf compat prototype
96 # AHX_CONFIG_INET_PTON - inet_pton compat prototype
97 # AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
98 # AHX_CONFIG_INET_ATON - inet_aton compat prototype
99 # AHX_CONFIG_MEMMOVE - memmove compat prototype
100 # AHX_CONFIG_STRLCAT - strlcat compat prototype
101 # AHX_CONFIG_STRLCPY - strlcpy compat prototype
102 # AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
103 # AHX_CONFIG_W32_SLEEP - w32 compat for sleep
104 # AHX_CONFIG_W32_USLEEP - w32 compat for usleep
105 # AHX_CONFIG_W32_RANDOM - w32 compat for random
106 # AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
107 # AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
108 # ACX_CFLAGS_STRIP - strip one flag from CFLAGS
109 # ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
110 # AHX_CONFIG_FLAG_OMITTED - define omitted flag
111 # AHX_CONFIG_FLAG_EXT - define omitted extension flag
112 # AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
113 # ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
114 # AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
115 # ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
116 # ACX_CHECK_PIE - add --enable-pie option and check if works
117 # ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
120 dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
121 dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
122 dnl $1: the text to change.
124 AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
127 dnl Calculate comma separated windows-resource numbers from package version.
128 dnl Picks the first three(,0) or four numbers out of the name.
129 dnl $1: variable for the result
130 AC_DEFUN([ACX_RSRC_VERSION],
131 [$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/' `]
134 dnl Routine to help check for compiler flags.
135 dnl Checks if the compiler will accept the flag.
136 dnl $1: the flag without a - in front, so g to check -g.
137 dnl $2: executed if yes
138 dnl $3: executed if no
139 AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
141 AC_REQUIRE([AC_PROG_CC])
142 AC_MSG_CHECKING(whether $CC supports -$1)
143 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
144 AC_CACHE_VAL(cv_prog_cc_flag_$cache,
146 echo 'void f(void){}' >conftest.c
147 if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
148 eval "cv_prog_cc_flag_$cache=yes"
150 eval "cv_prog_cc_flag_$cache=no"
152 rm -f conftest conftest.o conftest.c
154 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
165 dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
166 dnl ERRFLAG: result, compiler flag to turn warnings into errors
167 AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
169 ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
170 ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
171 [ERRFLAG="$ERRFLAG -errfmt"])
174 dnl Routine to help check for needed compiler flags.
176 dnl $2: the includes and code
177 dnl $3: if the given code only compiles with the flag, execute argument 3
178 dnl $4: if the given code compiles without the flag, execute argument 4
179 dnl $5: with and without flag the compile fails, execute argument 5.
180 AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
182 AC_REQUIRE([AC_PROG_CC])
183 AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
184 AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
186 dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
187 AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
189 echo '$2' > conftest.c
190 echo 'void f(){}' >>conftest.c
191 if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
192 eval "cv_prog_cc_flag_needed_$cache=no"
195 if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
196 eval "cv_prog_cc_flag_needed_$cache=yes"
198 eval "cv_prog_cc_flag_needed_$cache=fail"
199 #echo 'Test with flag fails too!'
201 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
202 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
207 rm -f conftest conftest.c conftest.o
209 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
214 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
216 #echo 'Test with flag is no!'
218 #echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
219 #echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
224 AC_MSG_RESULT(failed)
231 dnl Check for CC dependency flag
232 dnl DEPFLAG: set to flag that generates dependencies.
233 AC_DEFUN([ACX_DEPFLAG],
235 AC_MSG_CHECKING([$CC dependency flag])
236 echo 'void f(){}' >conftest.c
237 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
240 if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
243 DEPFLAG="-MM" # dunno do something
246 AC_MSG_RESULT($DEPFLAG)
251 dnl Determine flags that gives POSIX and BSD functionality.
252 dnl CFLAGS is modified for the result.
253 AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
255 ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
256 ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
258 AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
260 ACX_CHECK_COMPILER_FLAG_NEEDED($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,
262 #include "confdefs.h"
265 #include <sys/time.h>
282 const char* str = NULL;
285 t = ctime_r(&time, buf);
288 a = getopt(2, opts, "a");
290 str = gai_strerror(0);
291 if(str && t && tv.tv_usec && msg.msg_control)
295 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
297 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
299 #include "confdefs.h"
302 #include <sys/time.h>
319 const char* str = NULL;
322 t = ctime_r(&time, buf);
325 a = getopt(2, opts, "a");
327 str = gai_strerror(0);
328 if(str && t && tv.tv_usec && msg.msg_control)
332 ], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
334 ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
342 ], [CFLAGS="$CFLAGS $C99FLAG"])
344 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
353 ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
355 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
357 #include <netinet/in.h>
360 struct in6_pktinfo inf;
361 int a = (int)sizeof(inf);
364 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
366 # check again for GNU_SOURCE for setresgid. May fail if setresgid
367 # is not available at all. -D_FRSRESGID is to make this check unique.
368 # otherwise we would get the previous cached result.
369 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
374 int a = setresgid(0,0,0);
375 a = setresuid(0,0,0);
378 ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
380 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
382 #include "confdefs.h"
393 const char* str = NULL;
394 t = ctime_r(&time, buf);
395 str = gai_strerror(0);
400 ], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
402 ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
404 #include "confdefs.h"
407 #include <sys/time.h>
422 a = getopt(2, opts, "a");
428 ], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
430 ])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
432 dnl Check if CC supports -flto.
433 dnl in a way that supports clang and suncc (that flag does something else,
434 dnl but fails to link). It sets it in CFLAGS if it works.
435 AC_DEFUN([ACX_CHECK_FLTO], [
436 AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
437 AS_IF([test "x$enable_flto" != "xno"], [
438 AC_MSG_CHECKING([if $CC supports -flto])
440 CFLAGS="$CFLAGS -flto"
441 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
442 if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
448 rm -f conftest conftest.c conftest.o
449 ], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
453 dnl Check the printf-format attribute (if any)
454 dnl result in HAVE_ATTR_FORMAT.
455 dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
456 AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
457 [AC_REQUIRE([AC_PROG_CC])
458 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
459 AC_CACHE_VAL(ac_cv_c_format_attribute,
460 [ac_cv_c_format_attribute=no
461 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
462 void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
463 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
466 ]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"])
469 AC_MSG_RESULT($ac_cv_c_format_attribute)
470 if test $ac_cv_c_format_attribute = yes; then
471 AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
473 ])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
475 dnl Setup ATTR_FORMAT config.h parts.
476 dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
477 AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
479 #ifdef HAVE_ATTR_FORMAT
480 # define ATTR_FORMAT(archetype, string_index, first_to_check) \
481 __attribute__ ((format (archetype, string_index, first_to_check)))
482 #else /* !HAVE_ATTR_FORMAT */
483 # define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
484 #endif /* !HAVE_ATTR_FORMAT */
487 dnl Check how to mark function arguments as unused.
488 dnl result in HAVE_ATTR_UNUSED.
489 dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
490 AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
491 [AC_REQUIRE([AC_PROG_CC])
492 AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
493 AC_CACHE_VAL(ac_cv_c_unused_attribute,
494 [ac_cv_c_unused_attribute=no
495 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
496 void f (char *u __attribute__((unused)));
499 ]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"])
502 dnl Setup ATTR_UNUSED config.h parts.
503 dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
504 AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
507 # define ATTR_UNUSED(x) x
508 #elif defined(__cplusplus)
509 # define ATTR_UNUSED(x)
510 #elif defined(HAVE_ATTR_UNUSED)
511 # define ATTR_UNUSED(x) x __attribute__((unused))
512 #else /* !HAVE_ATTR_UNUSED */
513 # define ATTR_UNUSED(x) x
514 #endif /* !HAVE_ATTR_UNUSED */
517 AC_MSG_RESULT($ac_cv_c_unused_attribute)
518 if test $ac_cv_c_unused_attribute = yes; then
519 AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
523 dnl Pre-fun for ACX_LIBTOOL_C_ONLY
524 AC_DEFUN([ACX_LIBTOOL_C_PRE], [
525 # skip these tests, we do not need them.
526 AC_DEFUN([AC_PROG_F77], [:])
527 AC_DEFUN([AC_PROG_FC], [:])
528 AC_DEFUN([AC_PROG_CXX], [:])
529 AC_DEFUN([AC_PROG_CXXCPP], [:])
530 AC_DEFUN([AC_PROG_OBJC], [:])
531 AC_DEFUN([AC_PROG_OBJCCPP], [:])
532 AC_DEFUN([AC_LIBTOOL_CXX], [:])
533 AC_DEFUN([AC_LIBTOOL_F77], [:])
534 # always use ./libtool unless override from commandline (libtool=mylibtool)
535 if test -z "$libtool"; then
539 # avoid libtool max commandline length test on systems that fork slowly.
541 if echo "$host_os" | grep "sunos4" >/dev/null; then
542 lt_cv_sys_max_cmd_len=32750;
544 AC_PATH_TOOL(AR, ar, [false])
545 if test $AR = false; then
546 AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
550 dnl Perform libtool check, portably, only for C
551 AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
552 dnl as a requirement so that is gets called before LIBTOOL
553 dnl because libtools 'AC_REQUIRE' names are right after this one, before
554 dnl this function contents.
555 AC_REQUIRE([ACX_LIBTOOL_C_PRE])
559 dnl Detect if u_char type is defined, otherwise define it.
560 AC_DEFUN([ACX_TYPE_U_CHAR],
561 [AC_CHECK_TYPE([u_char], ,
562 [AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
564 #ifdef HAVE_WINSOCK2_H
565 # include <winsock2.h>
569 dnl Detect if rlim_t type is defined, otherwise define it.
570 AC_DEFUN([ACX_TYPE_RLIM_T],
571 [AC_CHECK_TYPE(rlim_t, ,
572 [AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
574 #ifdef HAVE_SYS_RESOURCE_H
575 # include <sys/resource.h>
579 dnl Detect if socklen_t type is defined, otherwise define it.
580 AC_DEFUN([ACX_TYPE_SOCKLEN_T],
582 AC_CHECK_TYPE(socklen_t, ,
583 [AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
585 #ifdef HAVE_SYS_SOCKET_H
586 # include <sys/socket.h>
588 #ifdef HAVE_WS2TCPIP_H
589 # include <ws2tcpip.h>
593 dnl Detect if in_addr_t type is defined, otherwise define it.
594 AC_DEFUN([ACX_TYPE_IN_ADDR_T],
595 [ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
597 #ifdef HAVE_SYS_TYPES_H
598 # include <sys/types.h>
600 #ifdef HAVE_NETINET_IN_H
601 # include <netinet/in.h>
605 dnl Detect if in_port_t type is defined, otherwise define it.
606 AC_DEFUN([ACX_TYPE_IN_PORT_T],
607 [ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
609 #ifdef HAVE_SYS_TYPES_H
610 # include <sys/types.h>
612 #ifdef HAVE_NETINET_IN_H
613 # include <netinet/in.h>
617 dnl Add option to disable the evil rpath. Check whether to use rpath or not.
618 dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
619 AC_DEFUN([ACX_ARG_RPATH],
622 [ --disable-rpath disable hardcoded rpath (default=enabled)],
623 enable_rpath=$enableval, enable_rpath=yes)
624 if test "x$enable_rpath" = xno; then
625 dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
626 AC_CONFIG_COMMANDS([disable-rpath], [
627 sed < libtool > libtool-2 \
628 's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
636 dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
637 dnl an absolute path.
638 dnl $1: the pathname to add.
639 AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
640 if test "x$enable_rpath" = xyes; then
641 if echo "$1" | grep "^/" >/dev/null; then
642 RUNTIME_PATH="$RUNTIME_PATH -R$1"
647 dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
648 dnl Takes one argument; the withval checked in those 2 functions
649 dnl sets up the environment for the given openssl path
650 AC_DEFUN([ACX_SSL_CHECKS], [
652 if test x_$withval != x_no; then
653 AC_MSG_CHECKING(for SSL)
654 if test -n "$withval"; then
655 dnl look for openssl install with different version, eg.
656 dnl in /usr/include/openssl11/openssl/ssl.h
657 dnl and /usr/lib64/openssl11/libssl.so
658 dnl with the --with-ssl=/usr/include/openssl11
659 if test ! -f "$withval/include/openssl/ssl.h" -a -f "$withval/openssl/ssl.h"; then
663 ssldir_include="$ssldir"
665 ssldir_lib=`echo $ssldir | sed -e 's/include/lib/'`
666 if test -f "$ssldir_lib/libssl.a" -o -f "$ssldir_lib/libssl.so"; then
669 ssldir_lib=`echo $ssldir | sed -e 's/include/lib64/'`
670 if test -f "$ssldir_lib/libssl.a" -o -f "$ssldir_lib/libssl.so"; then
673 AC_MSG_ERROR([Could not find openssl lib file, $ssldir_lib/libssl.[so,a], pass like "/usr/local" or "/usr/include/openssl11"])
678 if test x_$withval = x_ -o x_$withval = x_yes; then
679 withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
681 for dir in $withval; do
683 if test -f "$dir/include/openssl/ssl.h"; then
685 ssldir_include="$ssldir/include"
686 if test ! -d "$ssldir/lib" -a -d "$ssldir/lib64"; then
687 ssldir_lib="$ssldir/lib64"
689 ssldir_lib="$ssldir/lib"
694 if test x_$found_ssl != x_yes; then
695 AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
697 AC_MSG_RESULT(found in $ssldir)
698 AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
700 dnl assume /usr is already in the include, lib and dynlib paths.
701 if test "$ssldir" != "/usr"; then
702 CPPFLAGS="$CPPFLAGS -I$ssldir_include"
703 LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir_include"
704 LDFLAGS="$LDFLAGS -L$ssldir_lib"
705 LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir_lib"
706 ACX_RUNTIME_PATH_ADD([$ssldir_lib])
709 AC_MSG_CHECKING([for EVP_sha256 in -lcrypto])
710 LIBS="$LIBS -lcrypto"
711 LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
712 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
713 int EVP_sha256(void);
717 AC_DEFINE([HAVE_EVP_SHA256], 1,
718 [If you have EVP_sha256])
721 # check if -lwsock32 or -lgdi32 are needed.
723 BAKSSLLIBS="$LIBSSL_LIBS"
724 LIBS="$LIBS -lgdi32 -lws2_32"
725 LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32"
726 AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
727 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
728 int EVP_sha256(void);
731 AC_DEFINE([HAVE_EVP_SHA256], 1,
732 [If you have EVP_sha256])
737 LIBSSL_LIBS="$BAKSSLLIBS"
739 LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
740 AC_MSG_CHECKING([if -lcrypto needs -ldl])
741 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
742 int EVP_sha256(void);
745 AC_DEFINE([HAVE_EVP_SHA256], 1,
746 [If you have EVP_sha256])
751 LIBSSL_LIBS="$BAKSSLLIBS"
752 LIBS="$LIBS -ldl -pthread"
753 LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
754 AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread])
755 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
756 int EVP_sha256(void);
759 AC_DEFINE([HAVE_EVP_SHA256], 1,
760 [If you have EVP_sha256])
764 AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
771 AC_SUBST(RUNTIME_PATH)
773 AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
774 AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
775 AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
776 ])dnl End of ACX_SSL_CHECKS
778 dnl Check for SSL, where SSL is mandatory
779 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
780 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
781 dnl Checks main header files of SSL.
783 AC_DEFUN([ACX_WITH_SSL],
785 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
786 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[
790 if test x_$withval = x_no; then
791 AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
793 ACX_SSL_CHECKS($withval)
794 ])dnl End of ACX_WITH_SSL
796 dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
797 dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
798 dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
799 dnl Checks main header files of SSL.
801 AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
803 AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
804 /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[
808 ACX_SSL_CHECKS($withval)
809 ])dnl End of ACX_WITH_SSL_OPTIONAL
811 dnl Setup to use -lssl
812 dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
813 AC_DEFUN([ACX_LIB_SSL],
815 # check if libssl needs libdl
818 AC_MSG_CHECKING([if libssl needs libdl])
819 AC_TRY_LINK_FUNC([SSL_CTX_new], [
825 AC_SEARCH_LIBS([dlopen], [dl])
826 ]) ])dnl End of ACX_LIB_SSL
828 dnl Setup to use very large files (>2Gb).
829 dnl setups fseeko and its own
830 AC_DEFUN([ACX_SYS_LARGEFILE],
833 dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
834 ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
838 int a = fseeko(stdin, 0, 0);
841 ], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
844 dnl Check getaddrinfo.
845 dnl Works on linux, solaris, bsd and windows(links winsock).
846 dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
847 AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
848 [AC_REQUIRE([AC_PROG_CC])
849 AC_MSG_CHECKING(for getaddrinfo)
850 ac_cv_func_getaddrinfo=no
858 char* (*f) () = getaddrinfo;
867 dnl this case on linux, solaris, bsd
868 [ac_cv_func_getaddrinfo="yes"
869 dnl see if on windows
870 if test "$ac_cv_header_windows_h" = "yes"; then
871 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
873 if echo $LIBS | grep 'lws2_32' >/dev/null; then
876 LIBS="$LIBS -lws2_32"
880 dnl no quick getaddrinfo, try mingw32 and winsock2 library.
882 LIBS="$LIBS -lws2_32"
886 #ifdef HAVE_WS2TCPIP_H
887 #include <ws2tcpip.h>
891 (void)getaddrinfo(NULL, NULL, NULL, NULL);
895 ac_cv_func_getaddrinfo="yes"
896 dnl already: LIBS="$LIBS -lws2_32"
897 AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
901 ac_cv_func_getaddrinfo="no"
906 AC_MSG_RESULT($ac_cv_func_getaddrinfo)
907 if test $ac_cv_func_getaddrinfo = yes; then
908 AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
910 ])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
912 dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
913 dnl $1: function name
914 dnl $2: C-statement that calls the function.
915 dnl $3: includes for the program.
916 dnl $4: executes if yes
917 dnl $5: executes if no
918 AC_DEFUN([ACX_FUNC_DEPRECATED],
920 AC_REQUIRE([AC_PROG_CC])
921 AC_MSG_CHECKING(if $1 is deprecated)
922 cache=`echo $1 | sed 'y%.=/+-%___p_%'`
923 AC_CACHE_VAL(cv_cc_deprecated_$cache,
925 echo '$3' >conftest.c
926 echo 'void f(){ $2 }' >>conftest.c
927 if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
928 eval "cv_cc_deprecated_$cache=no"
930 eval "cv_cc_deprecated_$cache=yes"
932 rm -f conftest conftest.o conftest.c
934 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
936 AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
944 ])dnl end of ACX_FUNC_DEPRECATED
946 dnl check if select and nonblocking sockets actually work.
947 dnl Needs fork(2) and select(2).
948 dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
949 dnl a nonblocking socket do not work, a new call to select is necessary.
950 AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
952 AC_MSG_CHECKING([if nonblocking sockets work])
953 if echo $host | grep mingw >/dev/null; then
954 AC_MSG_RESULT([no (windows)])
955 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
964 #ifdef HAVE_SYS_TYPES_H
965 #include <sys/types.h>
967 #ifdef HAVE_SYS_SELECT_H
968 #include <sys/select.h>
970 #ifdef HAVE_SYS_SOCKET_H
971 #include <sys/socket.h>
973 #ifdef HAVE_NETINET_IN_H
974 #include <netinet/in.h>
976 #ifdef HAVE_ARPA_INET_H
977 #include <arpa/inet.h>
992 struct sockaddr_in a;
993 /* test if select and nonblocking reads work well together */
995 fork child to send 10 messages.
997 then try to nonblocking read the 10 messages
998 then, nonblocking read must give EAGAIN
1001 port = 12345 + (time(0)%32);
1002 sfd = socket(PF_INET, SOCK_DGRAM, 0);
1007 memset(&a, 0, sizeof(a));
1008 a.sin_family = AF_INET;
1009 a.sin_port = htons(port);
1010 a.sin_addr.s_addr = inet_addr("127.0.0.1");
1011 if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
1015 if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
1020 cfd = socket(PF_INET, SOCK_DGRAM, 0);
1022 perror("client socket");
1026 if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
1027 perror("client bind");
1030 a.sin_port = htons(port);
1032 /* no handler, causes exit in 10 seconds */
1035 /* send and receive on the socket */
1036 if((p=fork()) == 0) {
1037 for(i=0; i<num; i++) {
1038 if(sendto(cfd, &i, sizeof(i), 0,
1039 (struct sockaddr*)&a, sizeof(a)) < 0) {
1054 if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
1060 if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
1068 /* now we want to get EAGAIN: nonblocking goodness */
1070 recv(sfd, &x, sizeof(x), 0);
1071 if(errno != EAGAIN) {
1072 perror("trying to recv again");
1075 /* EAGAIN encountered */
1083 AC_MSG_RESULT([yes])
1086 AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
1088 AC_MSG_RESULT([crosscompile(yes)])
1091 ])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
1093 dnl Check if mkdir has one or two arguments.
1094 dnl defines MKDIR_HAS_ONE_ARG
1095 AC_DEFUN([ACX_MKDIR_ONE_ARG],
1097 AC_MSG_CHECKING([whether mkdir has one arg])
1098 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1101 #ifdef HAVE_WINSOCK2_H
1102 #include <winsock2.h>
1104 #ifdef HAVE_SYS_STAT_H
1105 #include <sys/stat.h>
1108 (void)mkdir("directory");
1109 ]])],[AC_MSG_RESULT(yes)
1110 AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
1111 ],[AC_MSG_RESULT(no)
1113 ])dnl end of ACX_MKDIR_ONE_ARG
1115 dnl Check for ioctlsocket function. works on mingw32 too.
1116 AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
1119 AC_MSG_CHECKING(for ioctlsocket)
1120 AC_LINK_IFELSE([AC_LANG_PROGRAM([
1121 #ifdef HAVE_WINSOCK2_H
1122 #include <winsock2.h>
1125 (void)ioctlsocket(0, 0, NULL);
1128 AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
1129 ],[AC_MSG_RESULT(no)])
1130 ])dnl end of ACX_FUNC_IOCTLSOCKET
1132 dnl detect malloc and provide malloc compat prototype.
1133 dnl $1: unique name for compat code
1134 AC_DEFUN([ACX_FUNC_MALLOC],
1136 AC_MSG_CHECKING([for GNU libc compatible malloc])
1137 AC_RUN_IFELSE([AC_LANG_PROGRAM(
1138 [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
1143 ]], [ if(malloc(0) != 0) return 1;])
1145 [AC_MSG_RESULT([no])
1147 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
1148 [AC_MSG_RESULT([yes])
1149 AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
1150 [AC_MSG_RESULT([no (crosscompile)])
1152 AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
1155 dnl Define fallback for fseeko and ftello if needed.
1156 AC_DEFUN([AHX_CONFIG_FSEEKO],
1159 #define fseeko fseek
1160 #define ftello ftell
1161 #endif /* HAVE_FSEEKO */
1164 dnl Define RAND_MAX if not defined
1165 AC_DEFUN([AHX_CONFIG_RAND_MAX],
1168 #define RAND_MAX 2147483647
1172 dnl Define MAXHOSTNAMELEN if not defined
1173 AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
1175 #ifndef MAXHOSTNAMELEN
1176 #define MAXHOSTNAMELEN 256
1180 dnl Define IPV6_MIN_MTU if not defined
1181 AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
1183 #ifndef IPV6_MIN_MTU
1184 #define IPV6_MIN_MTU 1280
1185 #endif /* IPV6_MIN_MTU */
1188 dnl provide snprintf, vsnprintf compat prototype
1189 dnl $1: unique name for compat code
1190 AC_DEFUN([AHX_CONFIG_SNPRINTF],
1192 #ifndef HAVE_SNPRINTF
1193 #define snprintf snprintf_$1
1194 #define vsnprintf vsnprintf_$1
1196 int snprintf (char *str, size_t count, const char *fmt, ...);
1197 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
1198 #endif /* HAVE_SNPRINTF */
1201 dnl provide inet_pton compat prototype.
1202 dnl $1: unique name for compat code
1203 AC_DEFUN([AHX_CONFIG_INET_PTON],
1205 #ifndef HAVE_INET_PTON
1206 #define inet_pton inet_pton_$1
1207 int inet_pton(int af, const char* src, void* dst);
1208 #endif /* HAVE_INET_PTON */
1211 dnl provide inet_ntop compat prototype.
1212 dnl $1: unique name for compat code
1213 AC_DEFUN([AHX_CONFIG_INET_NTOP],
1215 #ifndef HAVE_INET_NTOP
1216 #define inet_ntop inet_ntop_$1
1217 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
1221 dnl provide inet_aton compat prototype.
1222 dnl $1: unique name for compat code
1223 AC_DEFUN([AHX_CONFIG_INET_ATON],
1225 #ifndef HAVE_INET_ATON
1226 #define inet_aton inet_aton_$1
1227 int inet_aton(const char *cp, struct in_addr *addr);
1231 dnl provide memmove compat prototype.
1232 dnl $1: unique name for compat code
1233 AC_DEFUN([AHX_CONFIG_MEMMOVE],
1235 #ifndef HAVE_MEMMOVE
1236 #define memmove memmove_$1
1237 void *memmove(void *dest, const void *src, size_t n);
1241 dnl provide strlcat compat prototype.
1242 dnl $1: unique name for compat code
1243 AC_DEFUN([AHX_CONFIG_STRLCAT],
1245 #ifndef HAVE_STRLCAT
1246 #define strlcat strlcat_$1
1247 size_t strlcat(char *dst, const char *src, size_t siz);
1251 dnl provide strlcpy compat prototype.
1252 dnl $1: unique name for compat code
1253 AC_DEFUN([AHX_CONFIG_STRLCPY],
1255 #ifndef HAVE_STRLCPY
1256 #define strlcpy strlcpy_$1
1257 size_t strlcpy(char *dst, const char *src, size_t siz);
1261 dnl provide gmtime_r compat prototype.
1262 dnl $1: unique name for compat code
1263 AC_DEFUN([AHX_CONFIG_GMTIME_R],
1265 #ifndef HAVE_GMTIME_R
1266 #define gmtime_r gmtime_r_$1
1267 struct tm *gmtime_r(const time_t *timep, struct tm *result);
1271 dnl provide reallocarray compat prototype.
1272 dnl $1: unique name for compat code
1273 AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
1275 #ifndef HAVE_REALLOCARRAY
1276 #define reallocarray reallocarray$1
1277 void* reallocarray(void *ptr, size_t nmemb, size_t size);
1281 dnl provide w32 compat definition for sleep
1282 AC_DEFUN([AHX_CONFIG_W32_SLEEP],
1284 #if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
1285 #define sleep(x) Sleep((x)*1000) /* on win32 */
1286 #endif /* HAVE_SLEEP */
1289 dnl provide w32 compat definition for usleep
1290 AC_DEFUN([AHX_CONFIG_W32_USLEEP],
1293 #define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
1294 #endif /* HAVE_USLEEP */
1297 dnl provide w32 compat definition for random
1298 AC_DEFUN([AHX_CONFIG_W32_RANDOM],
1301 #define random rand /* on win32, for tests only (bad random) */
1302 #endif /* HAVE_RANDOM */
1305 dnl provide w32 compat definition for srandom
1306 AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
1308 #ifndef HAVE_SRANDOM
1309 #define srandom(x) srand(x) /* on win32, for tests only (bad random) */
1310 #endif /* HAVE_SRANDOM */
1313 dnl provide w32 compat definition for FD_SET_T
1314 AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
1316 /* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
1317 #ifdef HAVE_WINSOCK2_H
1318 #define FD_SET_T (u_int)
1324 dnl Remove an extension flag from CFLAGS, define replacement to be made.
1325 dnl Used by ACX_STRIP_EXT_FLAGS.
1326 dnl $1: the name of the flag, for example -D_GNU_SOURCE.
1327 AC_DEFUN([ACX_CFLAGS_STRIP],
1329 if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
1330 CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
1331 AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
1335 dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
1336 dnl use with ACX_DETERMINE_EXT_FLAGS.
1337 AC_DEFUN([ACX_STRIP_EXT_FLAGS],
1339 AC_MSG_NOTICE([Stripping extension flags...])
1340 ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
1341 ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
1342 ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
1343 ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
1344 ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
1345 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
1346 ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
1347 ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
1348 ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
1349 ]) dnl End of ACX_STRIP_EXT_FLAGS
1351 dnl define one omitted flag for config.h
1352 dnl $1: flag name. -D_GNU_SOURCE
1353 dnl $2: replacement define. _GNU_SOURCE
1354 dnl $3: define value, 1
1355 AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
1356 [#if defined($1) && !defined($2)
1360 dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
1361 dnl $1: the -DNAME or -DNAME=value string.
1362 AC_DEFUN([AHX_CONFIG_FLAG_EXT],
1363 [AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
1366 dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
1367 AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
1368 [AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
1369 AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
1370 AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
1371 AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
1372 AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
1373 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
1374 AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
1375 AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
1376 AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
1379 dnl check if memcmp is using signed characters and replace if so.
1380 AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
1381 [AC_MSG_CHECKING([if memcmp compares unsigned])
1382 AC_RUN_IFELSE([AC_LANG_SOURCE([[
1388 char a = 255, b = 0;
1389 if(memcmp(&a, &b, 1) < 0)
1393 ]])], [AC_MSG_RESULT([yes]) ],
1394 [ AC_MSG_RESULT([no])
1395 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1397 ], [ AC_MSG_RESULT([cross-compile no])
1398 AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
1402 dnl define memcmp to its replacement, pass unique id for program as arg
1403 AC_DEFUN([AHX_MEMCMP_BROKEN], [
1404 #ifdef MEMCMP_IS_BROKEN
1405 #include "compat/memcmp.h"
1406 #define memcmp memcmp_$1
1407 int memcmp(const void *x, const void *y, size_t n);
1411 dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
1412 AC_DEFUN([ACX_CHECK_SS_FAMILY],
1413 [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
1414 AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
1415 AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
1416 ],, [AC_INCLUDES_DEFAULT
1417 #ifdef HAVE_NETINET_IN_H
1418 #include <netinet/in.h>
1420 #ifdef HAVE_SYS_SOCKET_H
1421 #include <sys/socket.h>
1426 #ifdef HAVE_ARPA_INET_H
1427 #include <arpa/inet.h>
1430 ], [AC_INCLUDES_DEFAULT
1431 #ifdef HAVE_NETINET_IN_H
1432 #include <netinet/in.h>
1434 #ifdef HAVE_SYS_SOCKET_H
1435 #include <sys/socket.h>
1440 #ifdef HAVE_ARPA_INET_H
1441 #include <arpa/inet.h>
1445 dnl Check if CC and linker support -fPIE and -pie.
1446 dnl If so, sets them in CFLAGS / LDFLAGS.
1447 AC_DEFUN([ACX_CHECK_PIE], [
1448 AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
1449 AS_IF([test "x$enable_pie" = "xyes"], [
1450 AC_MSG_CHECKING([if $CC supports PIE])
1451 BAKLDFLAGS="$LDFLAGS"
1453 LDFLAGS="$LDFLAGS -pie"
1454 CFLAGS="$CFLAGS -fPIE"
1455 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1456 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1457 LDFLAGS="$BAKLDFLAGS"
1462 rm -f conftest conftest.c conftest.o
1463 ], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
1467 dnl Check if linker supports -Wl,-z,relro,-z,now.
1468 dnl If so, adds it to LDFLAGS.
1469 AC_DEFUN([ACX_CHECK_RELRO_NOW], [
1470 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)]))
1471 AS_IF([test "x$enable_relro_now" = "xyes"], [
1472 AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
1473 BAKLDFLAGS="$LDFLAGS"
1474 LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
1475 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
1476 if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
1477 LDFLAGS="$BAKLDFLAGS"
1482 rm -f conftest conftest.c conftest.o
1483 ], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])