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76 lines
3.2 KiB
76 lines
3.2 KiB
# =========================================================================== |
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# http://www.gnu.org/software/autoconf-archive/ax_check_compiler_flags.html |
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# =========================================================================== |
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# |
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# SYNOPSIS |
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# |
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# AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE]) |
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# |
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# DESCRIPTION |
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# |
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# Check whether the given compiler FLAGS work with the current language's |
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# compiler, or whether they give an error. (Warnings, however, are |
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# ignored.) |
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# |
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# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on |
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# success/failure. |
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# |
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# LICENSE |
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# |
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# Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu> |
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# Copyright (c) 2009 Matteo Frigo |
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# |
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# This program is free software: you can redistribute it and/or modify it |
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# under the terms of the GNU General Public License as published by the |
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# Free Software Foundation, either version 3 of the License, or (at your |
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# option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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# Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License along |
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# with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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# As a special exception, the respective Autoconf Macro's copyright owner |
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# gives unlimited permission to copy, distribute and modify the configure |
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# scripts that are the output of Autoconf when processing the Macro. You |
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# need not follow the terms of the GNU General Public License when using |
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# or distributing such scripts, even though portions of the text of the |
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# Macro appear in them. The GNU General Public License (GPL) does govern |
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# all other use of the material that constitutes the Autoconf Macro. |
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# |
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# This special exception to the GPL applies to versions of the Autoconf |
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# Macro released by the Autoconf Archive. When you make and distribute a |
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# modified version of the Autoconf Macro, you may extend this special |
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# exception to the GPL to apply to your modified version as well. |
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#serial 9 |
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AC_DEFUN([AX_CHECK_COMPILER_FLAGS], |
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[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX |
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AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1]) |
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dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname: |
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AS_LITERAL_IF([$1], |
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[AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]), [ |
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ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS |
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_AC_LANG_PREFIX[]FLAGS="$1" |
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], |
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AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes, |
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AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no) |
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_AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])], |
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[ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS |
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_AC_LANG_PREFIX[]FLAGS="$1" |
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], |
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eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes, |
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eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no) |
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_AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS]) |
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eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]) |
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AC_MSG_RESULT($ax_check_compiler_flags) |
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if test "x$ax_check_compiler_flags" = xyes; then |
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m4_default([$2], :) |
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else |
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m4_default([$3], :) |
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fi |
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])dnl AX_CHECK_COMPILER_FLAGS
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