diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/attributes.m4 | 311 | ||||
| -rw-r--r-- | m4/ax_check_flag.m4 | 147 |
2 files changed, 147 insertions, 311 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4 deleted file mode 100644 index 28fac277..00000000 --- a/m4/attributes.m4 +++ /dev/null @@ -1,311 +0,0 @@ -dnl Macros to check the presence of generic (non-typed) symbols. -dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com> -dnl Copyright (c) 2006-2008 xine project -dnl -dnl This program is free software; you can redistribute it and/or modify -dnl it under the terms of the GNU General Public License as published by -dnl the Free Software Foundation; either version 2, or (at your option) -dnl any later version. -dnl -dnl This program is distributed in the hope that it will be useful, -dnl but WITHOUT ANY WARRANTY; without even the implied warranty of -dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -dnl GNU General Public License for more details. -dnl -dnl You should have received a copy of the GNU General Public License -dnl along with this program; if not, write to the Free Software -dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -dnl 02110-1301, USA. -dnl -dnl As a special exception, the copyright owners of the -dnl macro gives unlimited permission to copy, distribute and modify the -dnl configure scripts that are the output of Autoconf when processing the -dnl Macro. You need not follow the terms of the GNU General Public -dnl License when using or distributing such scripts, even though portions -dnl of the text of the Macro appear in them. The GNU General Public -dnl License (GPL) does govern all other use of the material that -dnl constitutes the Autoconf Macro. -dnl -dnl This special exception to the GPL applies to versions of the -dnl Autoconf Macro released by this project. When you make and -dnl distribute a modified version of the Autoconf Macro, you may extend -dnl this special exception to the GPL to apply to your modified version as -dnl well. - -dnl Check if the flag is supported by compiler -dnl CC_CHECK_CFLAGS_SILENT([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND]) - -AC_DEFUN([CC_CHECK_CFLAGS_SILENT], [ - AC_CACHE_VAL(AS_TR_SH([cc_cv_cflags_$1]), - [ac_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $1" - AC_COMPILE_IFELSE([int a;], - [eval "AS_TR_SH([cc_cv_cflags_$1])='yes'"], - [eval "AS_TR_SH([cc_cv_cflags_$1])='no'"]) - CFLAGS="$ac_save_CFLAGS" - ]) - - AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes], - [$2], [$3]) -]) - -dnl Check if the flag is supported by compiler (cacheable) -dnl CC_CHECK_CFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND]) - -AC_DEFUN([CC_CHECK_CFLAGS], [ - AC_CACHE_CHECK([if $CC supports $1 flag], - AS_TR_SH([cc_cv_cflags_$1]), - CC_CHECK_CFLAGS_SILENT([$1]) dnl Don't execute actions here! - ) - - AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes], - [$2], [$3]) -]) - -dnl CC_CHECK_CFLAG_APPEND(FLAG, [action-if-found], [action-if-not-found]) -dnl Check for CFLAG and appends them to CFLAGS if supported -AC_DEFUN([CC_CHECK_CFLAG_APPEND], [ - AC_CACHE_CHECK([if $CC supports $1 flag], - AS_TR_SH([cc_cv_cflags_$1]), - CC_CHECK_CFLAGS_SILENT([$1]) dnl Don't execute actions here! - ) - - AS_IF([eval test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes], - [CFLAGS="$CFLAGS $1"; DEBUG_CFLAGS="$DEBUG_CFLAGS $1"; $2], [$3]) -]) - -dnl CC_CHECK_CFLAGS_APPEND([FLAG1 FLAG2], [action-if-found], [action-if-not]) -AC_DEFUN([CC_CHECK_CFLAGS_APPEND], [ - for flag in $1; do - CC_CHECK_CFLAG_APPEND($flag, [$2], [$3]) - done -]) - -dnl Check if the flag is supported by linker (cacheable) -dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND]) - -AC_DEFUN([CC_CHECK_LDFLAGS], [ - AC_CACHE_CHECK([if $CC supports $1 flag], - AS_TR_SH([cc_cv_ldflags_$1]), - [ac_save_LDFLAGS="$LDFLAGS" - LDFLAGS="$LDFLAGS $1" - AC_LINK_IFELSE([int main() { return 1; }], - [eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"], - [eval "AS_TR_SH([cc_cv_ldflags_$1])="]) - LDFLAGS="$ac_save_LDFLAGS" - ]) - - AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes], - [$2], [$3]) -]) - -dnl define the LDFLAGS_NOUNDEFINED variable with the correct value for -dnl the current linker to avoid undefined references in a shared object. -AC_DEFUN([CC_NOUNDEFINED], [ - dnl We check $host for which systems to enable this for. - AC_REQUIRE([AC_CANONICAL_HOST]) - - case $host in - dnl FreeBSD (et al.) does not complete linking for shared objects when pthreads - dnl are requested, as different implementations are present; to avoid problems - dnl use -Wl,-z,defs only for those platform not behaving this way. - *-freebsd* | *-openbsd*) ;; - *) - dnl First of all check for the --no-undefined variant of GNU ld. This allows - dnl for a much more readable commandline, so that people can understand what - dnl it does without going to look for what the heck -z defs does. - for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do - CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"]) - break - done - ;; - esac - - AC_SUBST([LDFLAGS_NOUNDEFINED]) -]) - -dnl Check for a -Werror flag or equivalent. -Werror is the GCC -dnl and ICC flag that tells the compiler to treat all the warnings -dnl as fatal. We usually need this option to make sure that some -dnl constructs (like attributes) are not simply ignored. -dnl -dnl Other compilers don't support -Werror per se, but they support -dnl an equivalent flag: -dnl - Sun Studio compiler supports -errwarn=%all -AC_DEFUN([CC_CHECK_WERROR], [ - AC_CACHE_CHECK( - [for $CC way to treat warnings as errors], - [cc_cv_werror], - [CC_CHECK_CFLAGS_SILENT([-Werror], [cc_cv_werror=-Werror], - [CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all])]) - ]) -]) - -AC_DEFUN([CC_CHECK_ATTRIBUTE], [ - AC_REQUIRE([CC_CHECK_WERROR]) - AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2]) ))], - AS_TR_SH([cc_cv_attribute_$1]), - [ac_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $cc_cv_werror" - AC_COMPILE_IFELSE([$3], - [eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"], - [eval "AS_TR_SH([cc_cv_attribute_$1])='no'"]) - CFLAGS="$ac_save_CFLAGS" - ]) - - AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes], - [AC_DEFINE( - AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1, - [Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))] - ) - $4], - [$5]) -]) - -AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [ - CC_CHECK_ATTRIBUTE( - [constructor],, - [void __attribute__((constructor)) ctor() { int a; }], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_FORMAT], [ - CC_CHECK_ATTRIBUTE( - [format], [format(printf, n, n)], - [void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [ - CC_CHECK_ATTRIBUTE( - [format_arg], [format_arg(printf)], - [char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [ - CC_CHECK_ATTRIBUTE( - [visibility_$1], [visibility("$1")], - [void __attribute__((visibility("$1"))) $1_function() { }], - [$2], [$3]) -]) - -AC_DEFUN([CC_ATTRIBUTE_NONNULL], [ - CC_CHECK_ATTRIBUTE( - [nonnull], [nonnull()], - [void __attribute__((nonnull())) some_function(void *foo, void *bar) { foo = (void*)0; bar = (void*)0; }], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_UNUSED], [ - CC_CHECK_ATTRIBUTE( - [unused], , - [void some_function(void *foo, __attribute__((unused)) void *bar);], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [ - CC_CHECK_ATTRIBUTE( - [sentinel], , - [void some_function(void *foo, ...) __attribute__((sentinel));], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [ - CC_CHECK_ATTRIBUTE( - [deprecated], , - [void some_function(void *foo, ...) __attribute__((deprecated));], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_ALIAS], [ - CC_CHECK_ATTRIBUTE( - [alias], [weak, alias], - [void other_function(void *foo) { } - void some_function(void *foo) __attribute__((weak, alias("other_function")));], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_MALLOC], [ - CC_CHECK_ATTRIBUTE( - [malloc], , - [void * __attribute__((malloc)) my_alloc(int n);], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_PACKED], [ - CC_CHECK_ATTRIBUTE( - [packed], , - [struct astructure { char a; int b; long c; void *d; } __attribute__((packed));], - [$1], [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_CONST], [ - CC_CHECK_ATTRIBUTE( - [const], , - [int __attribute__((const)) twopow(int n) { return 1 << n; } ], - [$1], [$2]) -]) - -AC_DEFUN([CC_FLAG_VISIBILITY], [ - AC_REQUIRE([CC_CHECK_WERROR]) - AC_CACHE_CHECK([if $CC supports -fvisibility=hidden], - [cc_cv_flag_visibility], - [cc_flag_visibility_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $cc_cv_werror" - CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden], - cc_cv_flag_visibility='yes', - cc_cv_flag_visibility='no') - CFLAGS="$cc_flag_visibility_save_CFLAGS"]) - - AS_IF([test "x$cc_cv_flag_visibility" = "xyes"], - [AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1, - [Define this if the compiler supports the -fvisibility flag]) - $1], - [$2]) -]) - -AC_DEFUN([CC_FUNC_EXPECT], [ - AC_REQUIRE([CC_CHECK_WERROR]) - AC_CACHE_CHECK([if compiler has __builtin_expect function], - [cc_cv_func_expect], - [ac_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $cc_cv_werror" - AC_COMPILE_IFELSE( - [int some_function() { - int a = 3; - return (int)__builtin_expect(a, 3); - }], - [cc_cv_func_expect=yes], - [cc_cv_func_expect=no]) - CFLAGS="$ac_save_CFLAGS" - ]) - - AS_IF([test "x$cc_cv_func_expect" = "xyes"], - [AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1, - [Define this if the compiler supports __builtin_expect() function]) - $1], - [$2]) -]) - -AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [ - AC_REQUIRE([CC_CHECK_WERROR]) - AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported], - [cc_cv_attribute_aligned], - [ac_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $cc_cv_werror" - for cc_attribute_align_try in 64 32 16 8 4 2; do - AC_COMPILE_IFELSE([ - int main() { - static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0; - return c; - }], [cc_cv_attribute_aligned=$cc_attribute_align_try; break]) - done - CFLAGS="$ac_save_CFLAGS" - ]) - - if test "x$cc_cv_attribute_aligned" != "x"; then - AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned], - [Define the highest alignment supported]) - fi -]) diff --git a/m4/ax_check_flag.m4 b/m4/ax_check_flag.m4 new file mode 100644 index 00000000..52405fd4 --- /dev/null +++ b/m4/ax_check_flag.m4 @@ -0,0 +1,147 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_check_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE]) +# AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS]) +# AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS]) +# +# DESCRIPTION +# +# Check whether the given FLAG works with the current language's +# preprocessor/compiler/linker, or whether they give an error. (Warnings, +# however, are ignored.) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# If EXTRA-FLAGS is defined, it is added to the current language's default +# flags (e.g. CFLAGS) when the check is done. The check us thus made +# with the following flags: "CFLAGS EXTRA-FLAGS FLAG". EXTRA-FLAGS can +# for example be used to force the compiler to issue an error when a bad +# flag is given. +# +# AX_APPEND_FLAG appends the FLAG to the FLAG-VARIABLE shell variable or +# the current language's flags if not specified. FLAG is not added to +# FLAG-VARIABLE if it is already in the shell variable. +# +# AX_APPEND_COMPILE_FLAGS checks for each FLAG1, FLAG2, etc. using +# AX_CHECK_COMPILE_FLAG and if the check is successful the flag is added +# to the appropriate FLAGS variable with AX_APPEND_FLAG. The +# FLAGS-VARIABLE and EXTRA-FLAGS arguments are the same as in the other +# macros. AX_APPEND_LINK_FLAGS does the same for linker flags. +# +# NOTE: Based on AX_CHECK_COMPILER_FLAGS and AX_CFLAGS_GCC_OPTION. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> +# Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu> +# Copyright (c) 2009 Matteo Frigo +# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> +# +# This program is free software: you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation, either version 3 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <http://www.gnu.org/licenses/>. +# +# As a special exception, the respective Autoconf Macro's copyright owner +# gives unlimited permission to copy, distribute and modify the configure +# scripts that are the output of Autoconf when processing the Macro. You +# need not follow the terms of the GNU General Public License when using +# or distributing such scripts, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +#serial 2 + +AC_DEFUN([AX_CHECK_PREPROC_FLAG], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]cppflags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG preprocessor accepts $1], CACHEVAR, [ + ax_check_save_flags=$CPPFLAGS + CPPFLAGS="$CPPFLAGS $4 $1" + AC_PREPROC_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([CACHEVAR],[yes])], + [AS_VAR_SET([CACHEVAR],[no])]) + CPPFLAGS=$ax_check_save_flags]) +AS_VAR_IF([CACHEVAR], "yes", + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_PREPROC_FLAGS + +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([CACHEVAR],[yes])], + [AS_VAR_SET([CACHEVAR],[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_VAR_IF([CACHEVAR], "yes", + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS + +AC_DEFUN([AX_CHECK_LINK_FLAG], +[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl +AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [ + ax_check_save_flags=$LDFLAGS + LDFLAGS="$LDFLAGS $4 $1" + AC_LINK_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([CACHEVAR],[yes])], + [AS_VAR_SET([CACHEVAR],[no])]) + LDFLAGS=$ax_check_save_flags]) +AS_VAR_IF([CACHEVAR], "yes", + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_LINK_FLAGS + + +AC_DEFUN([AX_APPEND_FLAG], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AC_REQUIRE([AC_PROG_GREP]) +AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[]FLAGS)])dnl +AS_VAR_SET_IF([FLAGS], + [AS_IF([AS_ECHO(" $[]FLAGS ") | $GREP " $1 " 2>&1 >/dev/null], + [AC_RUN_LOG([: FLAGS already contains $1])], + [AC_RUN_LOG([: FLAGS="$FLAGS $1"]) + AS_VAR_APPEND([FLAGS], [" $1"])])], + [AS_VAR_SET([FLAGS],[$1])]) +AS_VAR_POPDEF([FLAGS])dnl +])dnl AX_APPEND_FLAG + +AC_DEFUN([AX_APPEND_COMPILE_FLAGS], +[for flag in $1; do + AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3]) +done +])dnl AX_APPEND_COMPILE_FLAGS + +AC_DEFUN([AX_APPEND_LINK_FLAGS], +[for flag in $1; do + AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3]) +done +])dnl AX_APPEND_LINK_FLAGS |