# acx_nlnetlabs.m4 - common macros for configure checks # Copyright 2009, Wouter Wijngaards, NLnet Labs. # BSD licensed. # # Version 34 # 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 #include #include #ifdef HAVE_TIME_H #include #endif #include #include #ifdef HAVE_GETOPT_H #include #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 #include #include #ifdef HAVE_TIME_H #include #endif #include #include #ifdef HAVE_GETOPT_H #include #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 #include int test() { int a = 0; return a; } ], [CFLAGS="$CFLAGS $C99FLAG"]) ACX_CHECK_COMPILER_FLAG_NEEDED(-D_BSD_SOURCE -D_DEFAULT_SOURCE, [ #include int test() { int a; a = isascii(32); return a; } ], [CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"]) ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE, [ #include int test() { struct in6_pktinfo inf; int a = (int)sizeof(inf); return a; } ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"]) # check again for GNU_SOURCE for setresgid. May fail if setresgid # is not available at all. -D_FRSRESGID is to make this check unique. # otherwise we would get the previous cached result. ACX_CHECK_COMPILER_FLAG_NEEDED(-D_GNU_SOURCE -D_FRSRESGID, [ #include int test() { int a = setresgid(0,0,0); a = setresuid(0,0,0); return a; } ], [CFLAGS="$CFLAGS -D_GNU_SOURCE"]) ACX_CHECK_COMPILER_FLAG_NEEDED(-D_POSIX_C_SOURCE=200112, [ #include "confdefs.h" #ifdef HAVE_TIME_H #include #endif #include 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="$CFLAGS -D_POSIX_C_SOURCE=200112"]) ACX_CHECK_COMPILER_FLAG_NEEDED(-D__EXTENSIONS__, [ #include "confdefs.h" #include #include #include #ifdef HAVE_TIME_H #include #endif #include #ifdef HAVE_GETOPT_H #include #endif int test() { int a; char **opts = NULL; struct timeval tv; tv.tv_usec = 10; srandom(32); a = getopt(2, opts, "a"); a = isascii(32); if(tv.tv_usec) a = 0; return a; } ], [CFLAGS="$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_TRY_COMPILE( [#include 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_TRY_COMPILE( [#include 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]) AC_PROG_LIBTOOL ]) 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 #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 #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 #endif #ifdef HAVE_WS2TCPIP_H # include #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 #endif #ifdef HAVE_NETINET_IN_H # include #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 #endif #ifdef HAVE_NETINET_IN_H # include #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 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 "$dir/include/openssl/ssl.h"; then found_ssl="yes" AC_DEFINE_UNQUOTED([HAVE_SSL], [], [Define if you have the SSL libraries installed.]) dnl assume /usr/include is already in the include-path. if test "$ssldir" != "/usr"; then CPPFLAGS="$CPPFLAGS -I$ssldir/include" LIBSSL_CPPFLAGS="$LIBSSL_CPPFLAGS -I$ssldir/include" 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 $ssldir) HAVE_SSL=yes dnl assume /usr is already in the lib and dynlib paths. if test "$ssldir" != "/usr" -a "$ssldir" != ""; then LDFLAGS="$LDFLAGS -L$ssldir/lib" LIBSSL_LDFLAGS="$LIBSSL_LDFLAGS -L$ssldir/lib" ACX_RUNTIME_PATH_ADD([$ssldir/lib]) fi AC_MSG_CHECKING([for HMAC_Update in -lcrypto]) LIBS="$LIBS -lcrypto" LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto" AC_TRY_LINK(, [ int HMAC_Update(void); (void)HMAC_Update(); ], [ AC_MSG_RESULT(yes) AC_DEFINE([HAVE_HMAC_UPDATE], 1, [If you have HMAC_Update]) ], [ AC_MSG_RESULT(no) # check if -lwsock32 or -lgdi32 are needed. BAKLIBS="$LIBS" BAKSSLLIBS="$LIBSSL_LIBS" LIBS="$LIBS -lgdi32" LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32" AC_MSG_CHECKING([if -lcrypto needs -lgdi32]) AC_TRY_LINK([], [ int HMAC_Update(void); (void)HMAC_Update(); ],[ AC_DEFINE([HAVE_HMAC_UPDATE], 1, [If you have HMAC_Update]) 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_TRY_LINK([], [ int HMAC_Update(void); (void)HMAC_Update(); ],[ AC_DEFINE([HAVE_HMAC_UPDATE], 1, [If you have HMAC_Update]) 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_TRY_LINK([], [ int HMAC_Update(void); (void)HMAC_Update(); ],[ AC_DEFINE([HAVE_HMAC_UPDATE], 1, [If you have HMAC_Update]) AC_MSG_RESULT(yes) ],[ AC_MSG_RESULT(no) AC_MSG_ERROR([OpenSSL found in $ssldir, but version 0.9.7 or higher is required]) ]) ]) ]) ]) fi AC_SUBST(HAVE_SSL) AC_SUBST(RUNTIME_PATH) fi AC_CHECK_HEADERS([openssl/ssl.h],,, [AC_INCLUDES_DEFAULT]) AC_CHECK_HEADERS([openssl/err.h],,, [AC_INCLUDES_DEFAULT]) AC_CHECK_HEADERS([openssl/rand.h],,, [AC_INCLUDES_DEFAULT]) ])dnl End of ACX_SSL_CHECKS dnl Check for SSL, where SSL is mandatory dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS. dnl Checks main header files of SSL. dnl AC_DEFUN([ACX_WITH_SSL], [ AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname], [enable SSL (will check /usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[ ],[ withval="yes" ]) if test x_$withval = x_no; then AC_MSG_ERROR([Need SSL library to do digital signature cryptography]) fi ACX_SSL_CHECKS($withval) ])dnl End of ACX_WITH_SSL dnl Check for SSL, where ssl is optional (--without-ssl is allowed) dnl Adds --with-ssl option, searches for openssl and defines HAVE_SSL if found dnl Setup of CPPFLAGS, CFLAGS. Adds -lcrypto to LIBS. dnl Checks main header files of SSL. dnl AC_DEFUN([ACX_WITH_SSL_OPTIONAL], [ AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname], [enable SSL (will check /usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /opt/local /usr/sfw /usr)]),[ ],[ withval="yes" ]) ACX_SSL_CHECKS($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="$BAKLIBS" AC_SEARCH_LIBS([dlopen], [dl]) ]) ])dnl End of ACX_LIB_SSL dnl Setup to use very large files (>2Gb). dnl setups fseeko and its own AC_DEFUN([ACX_SYS_LARGEFILE], [ AC_SYS_LARGEFILE dnl try to see if an additional _LARGEFILE_SOURCE 1 is needed to get fseeko ACX_CHECK_COMPILER_FLAG_NEEDED(-D_LARGEFILE_SOURCE=1, [ #include int test() { int a = fseeko(stdin, 0, 0); return a; } ], [CFLAGS="$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 "$ac_cv_header_windows_h" = "yes"; then AC_DEFINE(USE_WINSOCK, 1, [Whether the windows socket API is used]) USE_WINSOCK="1" LIBS="$LIBS -lws2_32" 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 #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 -c conftest.c 2>&1 | grep deprecated`"; 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 $target | grep mingw32 >/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 #include #include #include #include #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_TIME_H #include #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 #include #ifdef HAVE_WINSOCK2_H #include #endif #ifdef HAVE_SYS_STAT_H #include #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 #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 #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 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 #include #include 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_$1 int memcmp(const void *x, const void *y, size_t n); #endif ]) dnl ACX_CHECK_SS_FAMILY - check for sockaddr_storage.ss_family AC_DEFUN([ACX_CHECK_SS_FAMILY], [AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [], [ AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family], [ AC_DEFINE([ss_family], [__ss_family], [Fallback member name for socket family in struct sockaddr_storage]) ],, [AC_INCLUDES_DEFAULT #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETDB_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif ]) ], [AC_INCLUDES_DEFAULT #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETDB_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif ]) ]) dnl Check if CC and linker support -fPIE and -pie. dnl If so, sets them in CFLAGS / LDFLAGS. AC_DEFUN([ACX_CHECK_PIE], [ AC_ARG_ENABLE([pie], AS_HELP_STRING([--enable-pie], [Enable Position-Independent Executable (eg. to fully benefit from ASLR, small performance penalty)])) AS_IF([test "x$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