# acx_nlnetlabs.m4 - common macros for configure checks
# Copyright 2009, Wouter Wijngaards, NLnet Labs.
# BSD licensed.
#
# Version 44
# 2022-09-01 fix checking if nonblocking sockets work on OpenBSD.
# 2021-08-17 fix sed script in ssldir split handling.
# 2021-08-17 fix for openssl to detect split version, with ssldir_include
# and ssldir_lib output directories.
# 2021-07-30 fix for openssl use of lib64 directory.
# 2021-06-14 fix nonblocking test to use host instead of target for mingw test.
# 2021-05-17 fix nonblocking socket test from grep on mingw32 to mingw for
# 64bit compatibility.
# 2021-03-24 fix ACX_FUNC_DEPRECATED to use CPPFLAGS and CFLAGS.
# 2021-01-05 fix defun for aclocal
# 2021-01-05 autoconf 2.70 autoupdate and fixes, no AC_TRY_COMPILE
# 2020-08-24 Use EVP_sha256 instead of HMAC_Update (for openssl-3.0.0).
# 2016-03-21 Check -ldl -pthread for libcrypto for ldns and openssl 1.1.0.
# 2016-03-21 Use HMAC_Update instead of HMAC_CTX_Init (for openssl-1.1.0).
# 2016-01-04 -D_DEFAULT_SOURCE defined with -D_BSD_SOURCE for Linux glibc 2.20
# 2015-12-11 FLTO check for new OSX, clang.
# 2015-11-18 spelling check fix.
# 2015-11-05 ACX_SSL_CHECKS no longer adds -ldl needlessly.
# 2015-08-28 ACX_CHECK_PIE and ACX_CHECK_RELRO_NOW added.
# 2015-03-17 AHX_CONFIG_REALLOCARRAY added
# 2013-09-19 FLTO help text improved.
# 2013-07-18 Enable ACX_CHECK_COMPILER_FLAG to test for -Wstrict-prototypes
# 2013-06-25 FLTO has --disable-flto option.
# 2013-05-03 Update W32_SLEEP for newer mingw that links but not defines it.
# 2013-03-22 Fix ACX_RSRC_VERSION for long version numbers.
# 2012-02-09 Fix AHX_MEMCMP_BROKEN with undef in compat/memcmp.h.
# 2012-01-20 Fix COMPILER_FLAGS_UNBOUND for gcc 4.6.2 assigned-not-used-warns.
# 2011-12-05 Fix getaddrinfowithincludes on windows with fedora16 mingw32-gcc.
# Fix ACX_MALLOC for redefined malloc error.
# Fix GETADDRINFO_WITH_INCLUDES to add -lws2_32
# 2011-11-10 Fix FLTO test to not drop a.out in current directory.
# 2011-11-01 Fix FLTO test for llvm on Lion.
# 2011-08-01 Fix nonblock test (broken at v13).
# 2011-08-01 Fix autoconf 2.68 warnings
# 2011-06-23 Add ACX_CHECK_FLTO to check -flto.
# 2010-08-16 Fix FLAG_OMITTED for AS_TR_CPP changes in autoconf-2.66.
# 2010-07-02 Add check for ss_family (for minix).
# 2010-04-26 Fix to use CPPFLAGS for CHECK_COMPILER_FLAGS.
# 2010-03-01 Fix RPATH using CONFIG_COMMANDS to run at the very end.
# 2010-02-18 WITH_SSL outputs the LIBSSL_LDFLAGS, LIBS, CPPFLAGS separate, -ldl
# 2010-02-01 added ACX_CHECK_MEMCMP_SIGNED, AHX_MEMCMP_BROKEN
# 2010-01-20 added AHX_COONFIG_STRLCAT
# 2009-07-14 U_CHAR detection improved for windows crosscompile.
# added ACX_FUNC_MALLOC
# fixup some #if to #ifdef
# NONBLOCKING test for mingw crosscompile.
# 2009-07-13 added ACX_WITH_SSL_OPTIONAL
# 2009-07-03 fixup LDFLAGS for empty ssl dir.
#
# Automates some of the checking constructs. Aims at portability for POSIX.
# Documentation for functions is below.
#
# the following macro's are provided in this file:
# (see below for details on each macro).
#
# ACX_ESCAPE_BACKSLASH - escape backslashes in var for C-preproc.
# ACX_RSRC_VERSION - create windows resource version number.
# ACX_CHECK_COMPILER_FLAG - see if cc supports a flag.
# ACX_CHECK_ERROR_FLAGS - see which flag is -werror (used below).
# ACX_CHECK_COMPILER_FLAG_NEEDED - see if flags make the code compile cleanly.
# ACX_DEPFLAG - find cc dependency flags.
# ACX_DETERMINE_EXT_FLAGS_UNBOUND - find out which flags enable BSD and POSIX.
# ACX_CHECK_FORMAT_ATTRIBUTE - find cc printf format syntax.
# ACX_CHECK_UNUSED_ATTRIBUTE - find cc variable unused syntax.
# ACX_CHECK_FLTO - see if cc supports -flto and use it if so.
# ACX_LIBTOOL_C_ONLY - create libtool for C only, improved.
# ACX_TYPE_U_CHAR - u_char type.
# ACX_TYPE_RLIM_T - rlim_t type.
# ACX_TYPE_SOCKLEN_T - socklen_t type.
# ACX_TYPE_IN_ADDR_T - in_addr_t type.
# ACX_TYPE_IN_PORT_T - in_port_t type.
# ACX_ARG_RPATH - add --disable-rpath option.
# ACX_WITH_SSL - add --with-ssl option, link -lcrypto.
# ACX_WITH_SSL_OPTIONAL - add --with-ssl option, link -lcrypto,
# where --without-ssl is also accepted
# ACX_LIB_SSL - setup to link -lssl.
# ACX_SYS_LARGEFILE - improved sys_largefile, fseeko, >2G files.
# ACX_CHECK_GETADDRINFO_WITH_INCLUDES - find getaddrinfo, portably.
# ACX_FUNC_DEPRECATED - see if func is deprecated.
# ACX_CHECK_NONBLOCKING_BROKEN - see if nonblocking sockets really work.
# ACX_MKDIR_ONE_ARG - determine mkdir(2) number of arguments.
# ACX_FUNC_IOCTLSOCKET - find ioctlsocket, portably.
# ACX_FUNC_MALLOC - check malloc, define replacement .
# AHX_CONFIG_FORMAT_ATTRIBUTE - config.h text for format.
# AHX_CONFIG_UNUSED_ATTRIBUTE - config.h text for unused.
# AHX_CONFIG_FSEEKO - define fseeko, ftello fallback.
# AHX_CONFIG_RAND_MAX - define RAND_MAX if needed.
# AHX_CONFIG_MAXHOSTNAMELEN - define MAXHOSTNAMELEN if needed.
# AHX_CONFIG_IPV6_MIN_MTU - define IPV6_MIN_MTU if needed.
# AHX_CONFIG_SNPRINTF - snprintf compat prototype
# AHX_CONFIG_INET_PTON - inet_pton compat prototype
# AHX_CONFIG_INET_NTOP - inet_ntop compat prototype
# AHX_CONFIG_INET_ATON - inet_aton compat prototype
# AHX_CONFIG_MEMMOVE - memmove compat prototype
# AHX_CONFIG_STRLCAT - strlcat compat prototype
# AHX_CONFIG_STRLCPY - strlcpy compat prototype
# AHX_CONFIG_GMTIME_R - gmtime_r compat prototype
# AHX_CONFIG_W32_SLEEP - w32 compat for sleep
# AHX_CONFIG_W32_USLEEP - w32 compat for usleep
# AHX_CONFIG_W32_RANDOM - w32 compat for random
# AHX_CONFIG_W32_SRANDOM - w32 compat for srandom
# AHX_CONFIG_W32_FD_SET_T - w32 detection of FD_SET_T.
# ACX_CFLAGS_STRIP - strip one flag from CFLAGS
# ACX_STRIP_EXT_FLAGS - strip extension flags from CFLAGS
# AHX_CONFIG_FLAG_OMITTED - define omitted flag
# AHX_CONFIG_FLAG_EXT - define omitted extension flag
# AHX_CONFIG_EXT_FLAGS - define the stripped extension flags
# ACX_CHECK_MEMCMP_SIGNED - check if memcmp uses signed characters.
# AHX_MEMCMP_BROKEN - replace memcmp func for CHECK_MEMCMP_SIGNED.
# ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
# ACX_CHECK_PIE - add --enable-pie option and check if works
# ACX_CHECK_RELRO_NOW - add --enable-relro-now option and check it
#
dnl Escape backslashes as \\, for C:\ paths, for the C preprocessor defines.
dnl for example, ACX_ESCAPE_BACKSLASH($from_var, to_var)
dnl $1: the text to change.
dnl $2: the result.
AC_DEFUN([ACX_ESCAPE_BACKSLASH], [$2="`echo $1 | sed -e 's/\\\\/\\\\\\\\/g'`"
])
dnl Calculate comma separated windows-resource numbers from package version.
dnl Picks the first three(,0) or four numbers out of the name.
dnl $1: variable for the result
AC_DEFUN([ACX_RSRC_VERSION],
[$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/' `]
])
dnl Routine to help check for compiler flags.
dnl Checks if the compiler will accept the flag.
dnl $1: the flag without a - in front, so g to check -g.
dnl $2: executed if yes
dnl $3: executed if no
AC_DEFUN([ACX_CHECK_COMPILER_FLAG],
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(whether $CC supports -$1)
cache=`echo $1 | sed 'y%.=/+-%___p_%'`
AC_CACHE_VAL(cv_prog_cc_flag_$cache,
[
echo 'void f(void){}' >conftest.c
if test -z "`$CC $CPPFLAGS $CFLAGS -$1 -c conftest.c 2>&1`"; then
eval "cv_prog_cc_flag_$cache=yes"
else
eval "cv_prog_cc_flag_$cache=no"
fi
rm -f conftest conftest.o conftest.c
])
if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
AC_MSG_RESULT(yes)
:
$2
else
AC_MSG_RESULT(no)
:
$3
fi
])
dnl setup flags for ACX_CHECK_COMPILER_FLAG_NEEDED
dnl ERRFLAG: result, compiler flag to turn warnings into errors
AC_DEFUN([ACX_CHECK_ERROR_FLAGS],
[
ACX_CHECK_COMPILER_FLAG(Werror, [ERRFLAG="-Werror"], [ERRFLAG="-errwarn"])
ACX_CHECK_COMPILER_FLAG(Wall, [ERRFLAG="$ERRFLAG -Wall"],
[ERRFLAG="$ERRFLAG -errfmt"])
])
dnl Routine to help check for needed compiler flags.
dnl $1: flags for CC
dnl $2: the includes and code
dnl $3: if the given code only compiles with the flag, execute argument 3
dnl $4: if the given code compiles without the flag, execute argument 4
dnl $5: with and without flag the compile fails, execute argument 5.
AC_DEFUN([ACX_CHECK_COMPILER_FLAG_NEEDED],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([ACX_CHECK_ERROR_FLAGS])
AC_MSG_CHECKING(whether we need $1 as a flag for $CC)
cache=AS_TR_SH($1)
dnl cache=`echo $1 | sed 'y%.=/+- %___p__%'`
AC_CACHE_VAL(cv_prog_cc_flag_needed_$cache,
[
echo '$2' > conftest.c
echo 'void f(){}' >>conftest.c
if test -z "`$CC $CPPFLAGS $CFLAGS $ERRFLAG -c conftest.c 2>&1`"; then
eval "cv_prog_cc_flag_needed_$cache=no"
else
[
if test -z "`$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`"; then
eval "cv_prog_cc_flag_needed_$cache=yes"
else
eval "cv_prog_cc_flag_needed_$cache=fail"
#echo 'Test with flag fails too!'
#cat conftest.c
#echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
#echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
#exit 1
fi
]
fi
rm -f conftest conftest.c conftest.o
])
if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
AC_MSG_RESULT(yes)
:
$3
else
if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
AC_MSG_RESULT(no)
#echo 'Test with flag is no!'
#cat conftest.c
#echo "$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1"
#echo `$CC $CPPFLAGS $CFLAGS $1 $ERRFLAG -c conftest.c 2>&1`
#exit 1
:
$4
else
AC_MSG_RESULT(failed)
:
$5
fi
fi
])
dnl Check for CC dependency flag
dnl DEPFLAG: set to flag that generates dependencies.
AC_DEFUN([ACX_DEPFLAG],
[
AC_MSG_CHECKING([$CC dependency flag])
echo 'void f(){}' >conftest.c
if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
DEPFLAG="-MM"
else
if test "`$CC -xM1 conftest.c 2>&1`" = "conftest.o: conftest.c"; then
DEPFLAG="-xM1"
else
DEPFLAG="-MM" # dunno do something
fi
fi
AC_MSG_RESULT($DEPFLAG)
rm -f conftest.c
AC_SUBST(DEPFLAG)
])
dnl Determine flags that gives POSIX and BSD functionality.
dnl CFLAGS is modified for the result.
AC_DEFUN([ACX_DETERMINE_EXT_FLAGS_UNBOUND],
[
ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])
AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])
ACX_CHECK_COMPILER_FLAG_NEEDED($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,
[
#include "confdefs.h"
#include <stdlib.h>
#include <ctype.h>
#include <sys/time.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <unistd.h>
#include <netdb.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
int test() {
int a;
char **opts = NULL;
struct timeval tv;
char *t;
time_t time = 0;
char *buf = NULL;
const char* str = NULL;
struct msghdr msg;
msg.msg_control = 0;
t = ctime_r(&time, buf);
tv.tv_usec = 10;
srandom(32);
a = getopt(2, opts, "a");
a = isascii(32);
str = gai_strerror(0);
if(str && t && tv.tv_usec && msg.msg_control)
a = 0;
return a;
}
], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"])
ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE,
[
#include "confdefs.h"
#include <stdlib.h>
#include <ctype.h>
#include <sys/time.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <unistd.h>
#include <netdb.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
int test() {
int a;
char **opts = NULL;
struct timeval tv;
char *t;
time_t time = 0;
char *buf = NULL;
const char* str = NULL;
struct msghdr msg;
msg.msg_control = 0;
t = ctime_r(&time, buf);
tv.tv_usec = 10;
srandom(32);
a = getopt(2, opts, "a");
a = isascii(32);
str = gai_strerror(0);
if(str && t && tv.tv_usec && msg.msg_control)
a = 0;
return a;
}
], [CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"])
ACX_CHECK_COMPILER_FLAG_NEEDED($C99FLAG,
[
#include <stdbool.h>
#include <ctype.h>
int test() {
int a = 0;
return a;
}
], [CFLAGS="$CFLAGS $C99FLAG"])
ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE,
[
#include <ctype.h>
int test() {
int a;
a = isascii(32);
return a;
}
], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"])
ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE,
[
#include <netinet/in.h>
int test() {
struct in6_pktinfo inf;
int a = (int)sizeof(inf);
return a;
}
], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
# check again for GNU_SOURCE for setresgid. May fail if setresgid
# is not available at all. -D_FRSRESGID is to make this check unique.
# otherwise we would get the previous cached result.
ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID,
[
#include <unistd.h>
int test() {
int a = setresgid(0,0,0);
a = setresuid(0,0,0);
return a;
}
], [CFLAGS="$CFLAGS -D_GNU_SOURCE"])
ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112,
[
#include "confdefs.h"
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <netdb.h>
int test() {
int a = 0;
char *t;
time_t time = 0;
char *buf = NULL;
const char* str = NULL;
t = ctime_r(&time, buf);
str = gai_strerror(0);
if(t && str)
a = 0;
return a;
}
], [CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"])
ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__,
[
#include "confdefs.h"
#include <stdlib.h>
#include <ctype.h>
#include <sys/time.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <unistd.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
int test() {
int a;
char **opts = NULL;
struct timeval tv;
tv.tv_usec = 10;
srandom(32);
a = getopt(2, opts, "a");
a = isascii(32);
if(tv.tv_usec)
a = 0;
return a;
}
], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
])dnl End of ACX_DETERMINE_EXT_FLAGS_UNBOUND
dnl Check if CC supports -flto.
dnl in a way that supports clang and suncc (that flag does something else,
dnl but fails to link). It sets it in CFLAGS if it works.
AC_DEFUN([ACX_CHECK_FLTO], [
AC_ARG_ENABLE([flto], AS_HELP_STRING([--disable-flto], [Disable link-time optimization (gcc specific option)]))
AS_IF([test "x$enable_flto" != "xno"], [
AC_MSG_CHECKING([if $CC supports -flto])
BAKCFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -flto"
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
CFLAGS="$BAKCFLAGS"
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes)
fi
rm -f conftest conftest.c conftest.o
], [CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
])
])
dnl Check the printf-format attribute (if any)
dnl result in HAVE_ATTR_FORMAT.
dnl Make sure you also include the AHX_CONFIG_FORMAT_ATTRIBUTE.
AC_DEFUN([ACX_CHECK_FORMAT_ATTRIBUTE],
[AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "format" attribute)
AC_CACHE_VAL(ac_cv_c_format_attribute,
[ac_cv_c_format_attribute=no
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
]], [[
f ("%s", "str");
]])],[ac_cv_c_format_attribute="yes"],[ac_cv_c_format_attribute="no"])
])
AC_MSG_RESULT($ac_cv_c_format_attribute)
if test $ac_cv_c_format_attribute = yes; then
AC_DEFINE(HAVE_ATTR_FORMAT, 1, [Whether the C compiler accepts the "format" attribute])
fi
])dnl End of ACX_CHECK_FORMAT_ATTRIBUTE
dnl Setup ATTR_FORMAT config.h parts.
dnl make sure you call ACX_CHECK_FORMAT_ATTRIBUTE also.
AC_DEFUN([AHX_CONFIG_FORMAT_ATTRIBUTE],
[
#ifdef HAVE_ATTR_FORMAT
# define ATTR_FORMAT(archetype, string_index, first_to_check) \
__attribute__ ((format (archetype, string_index, first_to_check)))
#else /* !HAVE_ATTR_FORMAT */
# define ATTR_FORMAT(archetype, string_index, first_to_check) /* empty */
#endif /* !HAVE_ATTR_FORMAT */
])
dnl Check how to mark function arguments as unused.
dnl result in HAVE_ATTR_UNUSED.
dnl Make sure you include AHX_CONFIG_UNUSED_ATTRIBUTE also.
AC_DEFUN([ACX_CHECK_UNUSED_ATTRIBUTE],
[AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "unused" attribute)
AC_CACHE_VAL(ac_cv_c_unused_attribute,
[ac_cv_c_unused_attribute=no
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
void f (char *u __attribute__((unused)));
]], [[
f ("x");
]])],[ac_cv_c_unused_attribute="yes"],[ac_cv_c_unused_attribute="no"])
])
dnl Setup ATTR_UNUSED config.h parts.
dnl make sure you call ACX_CHECK_UNUSED_ATTRIBUTE also.
AC_DEFUN([AHX_CONFIG_UNUSED_ATTRIBUTE],
[
#if defined(DOXYGEN)
# define ATTR_UNUSED(x) x
#elif defined(__cplusplus)
# define ATTR_UNUSED(x)
#elif defined(HAVE_ATTR_UNUSED)
# define ATTR_UNUSED(x) x __attribute__((unused))
#else /* !HAVE_ATTR_UNUSED */
# define ATTR_UNUSED(x) x
#endif /* !HAVE_ATTR_UNUSED */
])
AC_MSG_RESULT($ac_cv_c_unused_attribute)
if test $ac_cv_c_unused_attribute = yes; then
AC_DEFINE(HAVE_ATTR_UNUSED, 1, [Whether the C compiler accepts the "unused" attribute])
fi
])dnl
dnl Pre-fun for ACX_LIBTOOL_C_ONLY
AC_DEFUN([ACX_LIBTOOL_C_PRE], [
# skip these tests, we do not need them.
AC_DEFUN([AC_PROG_F77], [:])
AC_DEFUN([AC_PROG_FC], [:])
AC_DEFUN([AC_PROG_CXX], [:])
AC_DEFUN([AC_PROG_CXXCPP], [:])
AC_DEFUN([AC_PROG_OBJC], [:])
AC_DEFUN([AC_PROG_OBJCCPP], [:])
AC_DEFUN([AC_LIBTOOL_CXX], [:])
AC_DEFUN([AC_LIBTOOL_F77], [:])
# always use ./libtool unless override from commandline (libtool=mylibtool)
if test -z "$libtool"; then
libtool="./libtool"
fi
AC_SUBST(libtool)
# avoid libtool max commandline length test on systems that fork slowly.
AC_CANONICAL_HOST
if echo "$host_os" | grep "sunos4" >/dev/null; then
lt_cv_sys_max_cmd_len=32750;
fi
AC_PATH_TOOL(AR, ar, [false])
if test $AR = false; then
AC_MSG_ERROR([Cannot find 'ar', please extend PATH to include it])
fi
])
dnl Perform libtool check, portably, only for C
AC_DEFUN([ACX_LIBTOOL_C_ONLY], [
dnl as a requirement so that is gets called before LIBTOOL
dnl because libtools 'AC_REQUIRE' names are right after this one, before
dnl this function contents.
AC_REQUIRE([ACX_LIBTOOL_C_PRE])
LT_INIT
])
dnl Detect if u_char type is defined, otherwise define it.
AC_DEFUN([ACX_TYPE_U_CHAR],
[AC_CHECK_TYPE([u_char], ,
[AC_DEFINE([u_char], [unsigned char], [Define to 'unsigned char if not defined])], [
AC_INCLUDES_DEFAULT
#ifdef HAVE_WINSOCK2_H
# include <winsock2.h>
#endif
]) ])
dnl Detect if rlim_t type is defined, otherwise define it.
AC_DEFUN([ACX_TYPE_RLIM_T],
[AC_CHECK_TYPE(rlim_t, ,
[AC_DEFINE([rlim_t], [unsigned long], [Define to 'int' if not defined])], [
AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
]) ])
dnl Detect if socklen_t type is defined, otherwise define it.
AC_DEFUN([ACX_TYPE_SOCKLEN_T],
[
AC_CHECK_TYPE(socklen_t, ,
[AC_DEFINE([socklen_t], [int], [Define to 'int' if not defined])], [
AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_WS2TCPIP_H
# include <ws2tcpip.h>
#endif
]) ])
dnl Detect if in_addr_t type is defined, otherwise define it.
AC_DEFUN([ACX_TYPE_IN_ADDR_T],
[ AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
]) ])
dnl Detect if in_port_t type is defined, otherwise define it.
AC_DEFUN([ACX_TYPE_IN_PORT_T],
[ AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
]) ])
dnl Add option to disable the evil rpath. Check whether to use rpath or not.
dnl Adds the --disable-rpath option. Uses trick to edit the ./libtool.
AC_DEFUN([ACX_ARG_RPATH],
[
AC_ARG_ENABLE(rpath,
[ --disable-rpath disable hardcoded rpath (default=enabled)],
enable_rpath=$enableval, enable_rpath=yes)
if test "x$enable_rpath" = xno; then
dnl AC_MSG_RESULT([Fixing libtool for -rpath problems.])
AC_CONFIG_COMMANDS([disable-rpath], [
sed < libtool > libtool-2 \
's/^hardcode_libdir_flag_spec.*$'/'hardcode_libdir_flag_spec=" -D__LIBTOOL_RPATH_SED__ "/'
mv libtool-2 libtool
chmod 755 libtool
libtool="./libtool"
])
fi
])
dnl Add a -R to the RUNTIME_PATH. Only if rpath is enabled and it is
dnl an absolute path.
dnl $1: the pathname to add.
AC_DEFUN([ACX_RUNTIME_PATH_ADD], [
if test "x$enable_rpath" = xyes; then
if echo "$1" | grep "^/" >/dev/null; then
RUNTIME_PATH="$RUNTIME_PATH -R$1"
fi
fi
])
dnl Common code for both ACX_WITH_SSL and ACX_WITH_SSL_OPTIONAL
dnl Takes one argument; the withval checked in those 2 functions
dnl sets up the environment for the given openssl path
AC_DEFUN([ACX_SSL_CHECKS], [
withval=$1
if test x_$withval != x_no; then
AC_MSG_CHECKING(for SSL)
if test -n "$withval"; then
dnl look for openssl install with different version, eg.
dnl in /usr/include/openssl11/openssl/ssl.h
dnl and /usr/lib64/openssl11/libssl.so
dnl with the --with-ssl=/usr/include/openssl11
if test ! -f "$withval/include/openssl/ssl.h" -a -f "$withval/openssl/ssl.h"; then
ssldir="$withval"
found_ssl="yes"
withval=""
ssldir_include="$ssldir"
dnl find the libdir
ssldir_lib=`echo $ssldir | sed -e 's/include/lib/'`
if test -f "$ssldir_lib/libssl.a" -o -f "$ssldir_lib/libssl.so"; then
: # found here
else
ssldir_lib=`echo $ssldir | sed -e 's/include/lib64/'`
if test -f "$ssldir_lib/libssl.a" -o -f "$ssldir_lib/libssl.so"; then
: # found here
else
AC_MSG_ERROR([Could not find openssl lib file, $ssldir_lib/libssl.[so,a], pass like "/usr/local" or "/usr/include/openssl11"])
fi
fi
fi
fi
if test x_$withval = x_ -o x_$withval = x_yes; then
withval="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr"
fi
for dir in $withval; do
ssldir="$dir"
if test -f "$dir/include/openssl/ssl.h"; then
found_ssl="yes"
ssldir_include="$ssldir/include"
if test ! -d "$ssldir/lib" -a -d "$ssldir/lib64"; then
ssldir_lib="$ssldir/lib64"
else
ssldir_lib="$ssldir/lib"
fi
break;
fi
done
if test x_$found_ssl != x_yes; then
AC_MSG_ERROR(Cannot find the SSL libraries in $withval)
else
AC_MSG_RESULT(found in $ssldir)
AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.])
HAVE_SSL=yes
dnl assume /usr is already in the include, lib and dynlib paths.
if test "$ssldir" != "/usr"; then
CPPFLAGS="$CPPFLAGS -I$ssldir_include"
LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir_include"
LDFLAGS="$LDFLAGS -L$ssldir_lib"
LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir_lib"
ACX_RUNTIME_PATH_ADD([$ssldir_lib])
fi
AC_MSG_CHECKING([for EVP_sha256 in -lcrypto])
LIBS="$LIBS -lcrypto"
LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
int EVP_sha256(void);
(void)EVP_sha256();
]])],[
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_EVP_SHA256], 1,
[If you have EVP_sha256])
],[
AC_MSG_RESULT(no)
# check if -lwsock32 or -lgdi32 are needed.
BAKLIBS="$LIBS"
BAKSSLLIBS="$LIBSSL_LIBS"
LIBS="$LIBS -lgdi32 -lws2_32"
LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32"
AC_MSG_CHECKING([if -lcrypto needs -lgdi32])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
int EVP_sha256(void);
(void)EVP_sha256();
]])],[
AC_DEFINE([HAVE_EVP_SHA256], 1,
[If you have EVP_sha256])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
LIBS="$BAKLIBS"
LIBSSL_LIBS="$BAKSSLLIBS"
LIBS="$LIBS -ldl"
LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
AC_MSG_CHECKING([if -lcrypto needs -ldl])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
int EVP_sha256(void);
(void)EVP_sha256();
]])],[
AC_DEFINE([HAVE_EVP_SHA256], 1,
[If you have EVP_sha256])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
LIBS="$BAKLIBS"
LIBSSL_LIBS="$BAKSSLLIBS"
LIBS="$LIBS -ldl -pthread"
LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
AC_MSG_CHECKING([if -lcrypto needs -ldl -pthread])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[
int EVP_sha256(void);
(void)EVP_sha256();
]])],[
AC_DEFINE([HAVE_EVP_SHA256], 1,
[If you have EVP_sha256])
AC_MSG_RESULT(yes)
],[
AC_MSG_RESULT(no)
AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required])
])
])
])
])
fi
AC_SUBST(HAVE_SSL)
AC_SUBST(RUNTIME_PATH)
fi
AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT])
AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT])
AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT])
])dnl End of ACX_SSL_CHECKS
dnl Check for SSL, where SSL is mandatory
dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
dnl Checks main header files of SSL.
dnl
AC_DEFUN([ACX_WITH_SSL],
[
AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
/usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[
],[
withval="yes"
])
if test x_$withval = x_no; then
AC_MSG_ERROR([Need SSL library to do digital signature cryptography])
fi
ACX_SSL_CHECKS($withval)
])dnl End of ACX_WITH_SSL
dnl Check for SSL, where ssl is optional (--without-ssl is allowed)
dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found
dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS.
dnl Checks main header files of SSL.
dnl
AC_DEFUN([ACX_WITH_SSL_OPTIONAL],
[
AC_ARG_WITH(ssl, AS_HELP_STRING([--with-ssl=pathname],[enable SSL (will check /usr/local/ssl
/usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr or specify like /usr/include/openssl11)]),[
],[
withval="yes"
])
ACX_SSL_CHECKS($withval)
])dnl End of ACX_WITH_SSL_OPTIONAL
dnl Setup to use -lssl
dnl To use -lcrypto, use the ACX_WITH_SSL setup (before this one).
AC_DEFUN([ACX_LIB_SSL],
[
# check if libssl needs libdl
BAKLIBS="$LIBS"
LIBS="-lssl $LIBS"
AC_MSG_CHECKING([if libssl needs libdl])
AC_TRY_LINK_FUNC([SSL_CTX_new], [
AC_MSG_RESULT([no])
LIBS="$BAKLIBS"
] , [
AC_MSG_RESULT([yes])
LIBS="$BAKLIBS"
AC_SEARCH_LIBS([dlopen], [dl])
]) ])dnl End of ACX_LIB_SSL
dnl Setup to use very large files (>2Gb).
dnl setups fseeko and its own
AC_DEFUN([ACX_SYS_LARGEFILE],
[
AC_SYS_LARGEFILE
dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko
ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1,
[
#include <stdio.h>
int test() {
int a = fseeko(stdin, 0, 0);
return a;
}
], [CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"])
])
dnl Check getaddrinfo.
dnl Works on linux, solaris, bsd and windows(links winsock).
dnl defines HAVE_GETADDRINFO, USE_WINSOCK.
AC_DEFUN([ACX_CHECK_GETADDRINFO_WITH_INCLUDES],
[AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(for getaddrinfo)
ac_cv_func_getaddrinfo=no
AC_LINK_IFELSE(
[AC_LANG_SOURCE([[
#ifdef __cplusplus
extern "C"
{
#endif
char* getaddrinfo();
char* (*f) () = getaddrinfo;
#ifdef __cplusplus
}
#endif
int main() {
;
return 0;
}
]])],
dnl this case on linux, solaris, bsd
[ac_cv_func_getaddrinfo="yes"
dnl see if on windows
if test "$ac_cv_header_windows_h" = "yes"; then
AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
USE_WINSOCK="1"
if echo $LIBS | grep 'lws2_32' >/dev/null; then
:
else
LIBS="$LIBS -lws2_32"
fi
fi
],
dnl no quick getaddrinfo, try mingw32 and winsock2 library.
ORIGLIBS="$LIBS"
LIBS="$LIBS -lws2_32"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
],
[
(void)getaddrinfo(NULL, NULL, NULL, NULL);
]
)],
[
ac_cv_func_getaddrinfo="yes"
dnl already: LIBS="$LIBS -lws2_32"
AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used])
USE_WINSOCK="1"
],
[
ac_cv_func_getaddrinfo="no"
LIBS="$ORIGLIBS"
])
)
AC_MSG_RESULT($ac_cv_func_getaddrinfo)
if test $ac_cv_func_getaddrinfo = yes; then
AC_DEFINE(HAVE_GETADDRINFO, 1, [Whether getaddrinfo is available])
fi
])dnl Endof AC_CHECK_GETADDRINFO_WITH_INCLUDES
dnl check if a function is deprecated. defines DEPRECATED_func in config.h.
dnl $1: function name
dnl $2: C-statement that calls the function.
dnl $3: includes for the program.
dnl $4: executes if yes
dnl $5: executes if no
AC_DEFUN([ACX_FUNC_DEPRECATED],
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(if $1 is deprecated)
cache=`echo $1 | sed 'y%.=/+-%___p_%'`
AC_CACHE_VAL(cv_cc_deprecated_$cache,
[
echo '$3' >conftest.c
echo 'void f(){ $2 }' >>conftest.c
if test -z "`$CC $CPPFLAGS $CFLAGS -c conftest.c 2>&1 | grep -e deprecated -e unavailable`"; then
eval "cv_cc_deprecated_$cache=no"
else
eval "cv_cc_deprecated_$cache=yes"
fi
rm -f conftest conftest.o conftest.c
])
if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
AC_MSG_RESULT(yes)
AC_DEFINE_UNQUOTED(AS_TR_CPP([DEPRECATED_$1]), 1, [Whether $1 is deprecated])
:
$4
else
AC_MSG_RESULT(no)
:
$5
fi
])dnl end of ACX_FUNC_DEPRECATED
dnl check if select and nonblocking sockets actually work.
dnl Needs fork(2) and select(2).
dnl defines NONBLOCKING_IS_BROKEN, and if that is true multiple reads from
dnl a nonblocking socket do not work, a new call to select is necessary.
AC_DEFUN([ACX_CHECK_NONBLOCKING_BROKEN],
[
AC_MSG_CHECKING([if nonblocking sockets work])
if echo $host | grep mingw >/dev/null; then
AC_MSG_RESULT([no (windows)])
AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
else
AC_RUN_IFELSE([
AC_LANG_SOURCE([[
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
int main(void)
{
int port;
int sfd, cfd;
int num = 10;
int i, p;
struct sockaddr_in a;
/* test if select and nonblocking reads work well together */
/* open port.
fork child to send 10 messages.
select to read.
then try to nonblocking read the 10 messages
then, nonblocking read must give EAGAIN
*/
port = 12345 + (time(0)%32);
sfd = socket(PF_INET, SOCK_DGRAM, 0);
if(sfd == -1) {
perror("socket");
return 1;
}
memset(&a, 0, sizeof(a));
a.sin_family = AF_INET;
a.sin_port = htons(port);
a.sin_addr.s_addr = inet_addr("127.0.0.1");
if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
perror("bind");
return 1;
}
if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
perror("fcntl");
return 1;
}
cfd = socket(PF_INET, SOCK_DGRAM, 0);
if(cfd == -1) {
perror("client socket");
return 1;
}
a.sin_port = 0;
if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
perror("client bind");
return 1;
}
a.sin_port = htons(port);
/* no handler, causes exit in 10 seconds */
alarm(10);
/* send and receive on the socket */
if((p=fork()) == 0) {
for(i=0; i<num; i++) {
if(sendto(cfd, &i, sizeof(i), 0,
(struct sockaddr*)&a, sizeof(a)) < 0) {
perror("sendto");
return 1;
}
}
} else {
/* parent */
fd_set rset;
int x;
if(p == -1) {
perror("fork");
return 1;
}
FD_ZERO(&rset);
FD_SET(sfd, &rset);
if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
perror("select");
return 1;
}
i = 0;
while(i < num) {
if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
if(errno == EAGAIN)
continue;
perror("recv");
return 1;
}
i++;
}
/* now we want to get EAGAIN: nonblocking goodness */
errno = 0;
recv(sfd, &x, sizeof(x), 0);
if(errno != EAGAIN) {
perror("trying to recv again");
return 1;
}
/* EAGAIN encountered */
}
close(sfd);
close(cfd);
return 0;
}
]])], [
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
], [
AC_MSG_RESULT([crosscompile(yes)])
])
fi
])dnl End of ACX_CHECK_NONBLOCKING_BROKEN
dnl Check if mkdir has one or two arguments.
dnl defines MKDIR_HAS_ONE_ARG
AC_DEFUN([ACX_MKDIR_ONE_ARG],
[
AC_MSG_CHECKING([whether mkdir has one arg])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
]], [[
(void)mkdir("directory");
]])],[AC_MSG_RESULT(yes)
AC_DEFINE(MKDIR_HAS_ONE_ARG, 1, [Define if mkdir has one argument.])
],[AC_MSG_RESULT(no)
])
])dnl end of ACX_MKDIR_ONE_ARG
dnl Check for ioctlsocket function. works on mingw32 too.
AC_DEFUN([ACX_FUNC_IOCTLSOCKET],
[
# check ioctlsocket
AC_MSG_CHECKING(for ioctlsocket)
AC_LINK_IFELSE([AC_LANG_PROGRAM([
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
], [
(void)ioctlsocket(0, 0, NULL);
])], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOCTLSOCKET, 1, [if the function 'ioctlsocket' is available])
],[AC_MSG_RESULT(no)])
])dnl end of ACX_FUNC_IOCTLSOCKET
dnl detect malloc and provide malloc compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([ACX_FUNC_MALLOC],
[
AC_MSG_CHECKING([for GNU libc compatible malloc])
AC_RUN_IFELSE([AC_LANG_PROGRAM(
[[#if defined STDC_HEADERS || defined HAVE_STDLIB_H
#include <stdlib.h>
#else
char *malloc ();
#endif
]], [ if(malloc(0) != 0) return 1;])
],
[AC_MSG_RESULT([no])
AC_LIBOBJ(malloc)
AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] ,
[AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_MALLOC], 1, [If have GNU libc compatible malloc])],
[AC_MSG_RESULT([no (crosscompile)])
AC_LIBOBJ(malloc)
AC_DEFINE_UNQUOTED([malloc], [rpl_malloc_$1], [Define if replacement function should be used.])] )
])
dnl Define fallback for fseeko and ftello if needed.
AC_DEFUN([AHX_CONFIG_FSEEKO],
[
#ifndef HAVE_FSEEKO
#define fseeko fseek
#define ftello ftell
#endif /* HAVE_FSEEKO */
])
dnl Define RAND_MAX if not defined
AC_DEFUN([AHX_CONFIG_RAND_MAX],
[
#ifndef RAND_MAX
#define RAND_MAX 2147483647
#endif
])
dnl Define MAXHOSTNAMELEN if not defined
AC_DEFUN([AHX_CONFIG_MAXHOSTNAMELEN],
[
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
])
dnl Define IPV6_MIN_MTU if not defined
AC_DEFUN([AHX_CONFIG_IPV6_MIN_MTU],
[
#ifndef IPV6_MIN_MTU
#define IPV6_MIN_MTU 1280
#endif /* IPV6_MIN_MTU */
])
dnl provide snprintf, vsnprintf compat prototype
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_SNPRINTF],
[
#ifndef HAVE_SNPRINTF
#define snprintf snprintf_$1
#define vsnprintf vsnprintf_$1
#include <stdarg.h>
int snprintf (char *str, size_t count, const char *fmt, ...);
int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
#endif /* HAVE_SNPRINTF */
])
dnl provide inet_pton compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_INET_PTON],
[
#ifndef HAVE_INET_PTON
#define inet_pton inet_pton_$1
int inet_pton(int af, const char* src, void* dst);
#endif /* HAVE_INET_PTON */
])
dnl provide inet_ntop compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_INET_NTOP],
[
#ifndef HAVE_INET_NTOP
#define inet_ntop inet_ntop_$1
const char *inet_ntop(int af, const void *src, char *dst, size_t size);
#endif
])
dnl provide inet_aton compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_INET_ATON],
[
#ifndef HAVE_INET_ATON
#define inet_aton inet_aton_$1
int inet_aton(const char *cp, struct in_addr *addr);
#endif
])
dnl provide memmove compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_MEMMOVE],
[
#ifndef HAVE_MEMMOVE
#define memmove memmove_$1
void *memmove(void *dest, const void *src, size_t n);
#endif
])
dnl provide strlcat compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_STRLCAT],
[
#ifndef HAVE_STRLCAT
#define strlcat strlcat_$1
size_t strlcat(char *dst, const char *src, size_t siz);
#endif
])
dnl provide strlcpy compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_STRLCPY],
[
#ifndef HAVE_STRLCPY
#define strlcpy strlcpy_$1
size_t strlcpy(char *dst, const char *src, size_t siz);
#endif
])
dnl provide gmtime_r compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_GMTIME_R],
[
#ifndef HAVE_GMTIME_R
#define gmtime_r gmtime_r_$1
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#endif
])
dnl provide reallocarray compat prototype.
dnl $1: unique name for compat code
AC_DEFUN([AHX_CONFIG_REALLOCARRAY],
[
#ifndef HAVE_REALLOCARRAY
#define reallocarray reallocarray$1
void* reallocarray(void *ptr, size_t nmemb, size_t size);
#endif
])
dnl provide w32 compat definition for sleep
AC_DEFUN([AHX_CONFIG_W32_SLEEP],
[
#if !defined(HAVE_SLEEP) || defined(HAVE_WINDOWS_H)
#define sleep(x) Sleep((x)*1000) /* on win32 */
#endif /* HAVE_SLEEP */
])
dnl provide w32 compat definition for usleep
AC_DEFUN([AHX_CONFIG_W32_USLEEP],
[
#ifndef HAVE_USLEEP
#define usleep(x) Sleep((x)/1000 + 1) /* on win32 */
#endif /* HAVE_USLEEP */
])
dnl provide w32 compat definition for random
AC_DEFUN([AHX_CONFIG_W32_RANDOM],
[
#ifndef HAVE_RANDOM
#define random rand /* on win32, for tests only (bad random) */
#endif /* HAVE_RANDOM */
])
dnl provide w32 compat definition for srandom
AC_DEFUN([AHX_CONFIG_W32_SRANDOM],
[
#ifndef HAVE_SRANDOM
#define srandom(x) srand(x) /* on win32, for tests only (bad random) */
#endif /* HAVE_SRANDOM */
])
dnl provide w32 compat definition for FD_SET_T
AC_DEFUN([AHX_CONFIG_W32_FD_SET_T],
[
/* detect if we need to cast to unsigned int for FD_SET to avoid warnings */
#ifdef HAVE_WINSOCK2_H
#define FD_SET_T (u_int)
#else
#define FD_SET_T
#endif
])
dnl Remove an extension flag from CFLAGS, define replacement to be made.
dnl Used by ACX_STRIP_EXT_FLAGS.
dnl $1: the name of the flag, for example -D_GNU_SOURCE.
AC_DEFUN([ACX_CFLAGS_STRIP],
[
if echo $CFLAGS | grep " $1" >/dev/null 2>&1; then
CFLAGS="`echo $CFLAGS | sed -e 's/ $1//g'`"
AC_DEFINE(m4_bpatsubst(OMITTED_$1,[[-=]],_), 1, Put $1 define in config.h)
fi
])
dnl Remove EXT flags from the CFLAGS and set them to be defined in config.h
dnl use with ACX_DETERMINE_EXT_FLAGS.
AC_DEFUN([ACX_STRIP_EXT_FLAGS],
[
AC_MSG_NOTICE([Stripping extension flags...])
ACX_CFLAGS_STRIP(-D_GNU_SOURCE)
ACX_CFLAGS_STRIP(-D_BSD_SOURCE)
ACX_CFLAGS_STRIP(-D_DEFAULT_SOURCE)
ACX_CFLAGS_STRIP(-D__EXTENSIONS__)
ACX_CFLAGS_STRIP(-D_POSIX_C_SOURCE=200112)
ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE=600)
ACX_CFLAGS_STRIP(-D_XOPEN_SOURCE_EXTENDED=1)
ACX_CFLAGS_STRIP(-D_ALL_SOURCE)
ACX_CFLAGS_STRIP(-D_LARGEFILE_SOURCE=1)
]) dnl End of ACX_STRIP_EXT_FLAGS
dnl define one omitted flag for config.h
dnl $1: flag name. -D_GNU_SOURCE
dnl $2: replacement define. _GNU_SOURCE
dnl $3: define value, 1
AC_DEFUN([AHX_CONFIG_FLAG_OMITTED],
[#if defined($1) && !defined($2)
#define $2 $3
[#]endif ])
dnl Wrapper for AHX_CONFIG_FLAG_OMITTED for -D style flags
dnl $1: the -DNAME or -DNAME=value string.
AC_DEFUN([AHX_CONFIG_FLAG_EXT],
[AHX_CONFIG_FLAG_OMITTED(m4_bpatsubst(OMITTED_$1,[[-=]],_),m4_bpatsubst(m4_bpatsubst($1,-D,),=.*$,),m4_if(m4_bregexp($1,=),-1,1,m4_bpatsubst($1,^.*=,)))
])
dnl config.h part to define omitted cflags, use with ACX_STRIP_EXT_FLAGS.
AC_DEFUN([AHX_CONFIG_EXT_FLAGS],
[AHX_CONFIG_FLAG_EXT(-D_GNU_SOURCE)
AHX_CONFIG_FLAG_EXT(-D_BSD_SOURCE)
AHX_CONFIG_FLAG_EXT(-D_DEFAULT_SOURCE)
AHX_CONFIG_FLAG_EXT(-D__EXTENSIONS__)
AHX_CONFIG_FLAG_EXT(-D_POSIX_C_SOURCE=200112)
AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE=600)
AHX_CONFIG_FLAG_EXT(-D_XOPEN_SOURCE_EXTENDED=1)
AHX_CONFIG_FLAG_EXT(-D_ALL_SOURCE)
AHX_CONFIG_FLAG_EXT(-D_LARGEFILE_SOURCE=1)
])
dnl check if memcmp is using signed characters and replace if so.
AC_DEFUN([ACX_CHECK_MEMCMP_SIGNED],
[AC_MSG_CHECKING([if memcmp compares unsigned])
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
char a = 255, b = 0;
if(memcmp(&a, &b, 1) < 0)
return 1;
return 0;
}
]])], [AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
AC_LIBOBJ([memcmp])
], [ AC_MSG_RESULT([cross-compile no])
AC_DEFINE([MEMCMP_IS_BROKEN], [1], [Define if memcmp() does not compare unsigned bytes])
AC_LIBOBJ([memcmp])
]) ])
dnl define memcmp to its replacement, pass unique id for program as arg
AC_DEFUN([AHX_MEMCMP_BROKEN], [
#ifdef MEMCMP_IS_BROKEN
#include "compat/memcmp.h"
#define memcmp memcmp_$1
int memcmp(const void *x, const void *y, size_t n);
#endif
])
dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family
AC_DEFUN([ACX_CHECK_SS_FAMILY],
[AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [
AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [
AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage])
],, [AC_INCLUDES_DEFAULT
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
])
], [AC_INCLUDES_DEFAULT
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
]) ])
dnl Check if CC and linker support -fPIE and -pie.
dnl If so, sets them in CFLAGS / LDFLAGS.
AC_DEFUN([ACX_CHECK_PIE], [
AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)]))
AS_IF([test "x$enable_pie" = "xyes"], [
AC_MSG_CHECKING([if $CC supports PIE])
BAKLDFLAGS="$LDFLAGS"
BAKCFLAGS="$CFLAGS"
LDFLAGS="$LDFLAGS -pie"
CFLAGS="$CFLAGS -fPIE"
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
LDFLAGS="$BAKLDFLAGS"
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes)
fi
rm -f conftest conftest.c conftest.o
], [LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; AC_MSG_RESULT(no)])
])
])
dnl Check if linker supports -Wl,-z,relro,-z,now.
dnl If so, adds it to LDFLAGS.
AC_DEFUN([ACX_CHECK_RELRO_NOW], [
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)]))
AS_IF([test "x$enable_relro_now" = "xyes"], [
AC_MSG_CHECKING([if $CC supports -Wl,-z,relro,-z,now])
BAKLDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
LDFLAGS="$BAKLDFLAGS"
AC_MSG_RESULT(no)
else
AC_MSG_RESULT(yes)
fi
rm -f conftest conftest.c conftest.o
], [LDFLAGS="$BAKLDFLAGS" ; AC_MSG_RESULT(no)])
])
])
dnl End of file