| # =========================================================================== |
| # http://www.gnu.org/software/autoconf-archive/ax_check_compiler_flags.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE]) |
| # |
| # DESCRIPTION |
| # |
| # Check whether the given compiler FLAGS work with the current language's |
| # compiler, or whether they give an error. (Warnings, however, are |
| # ignored.) |
| # |
| # ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on |
| # success/failure. |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu> |
| # Copyright (c) 2009 Matteo Frigo |
| # |
| # 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 9 |
| |
| AC_DEFUN([AX_CHECK_COMPILER_FLAGS], |
| [AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX |
| AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1]) |
| dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname: |
| AS_LITERAL_IF([$1], |
| [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]), [ |
| ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS |
| _AC_LANG_PREFIX[]FLAGS="$1" |
| AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], |
| AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes, |
| AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no) |
| _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])], |
| [ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS |
| _AC_LANG_PREFIX[]FLAGS="$1" |
| AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], |
| eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes, |
| eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no) |
| _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS]) |
| eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]) |
| AC_MSG_RESULT($ax_check_compiler_flags) |
| if test "x$ax_check_compiler_flags" = xyes; then |
| m4_default([$2], :) |
| else |
| m4_default([$3], :) |
| fi |
| ])dnl AX_CHECK_COMPILER_FLAGS |