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Diffstat (limited to 'm4/ax_check_compile_flag.m4')
| -rw-r--r-- | m4/ax_check_compile_flag.m4 | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4 new file mode 100644 index 0000000..51df0c0 --- /dev/null +++ b/m4/ax_check_compile_flag.m4 | |||
| @@ -0,0 +1,74 @@ | |||
| 1 | # =========================================================================== | ||
| 2 | # http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html | ||
| 3 | # =========================================================================== | ||
| 4 | # | ||
| 5 | # SYNOPSIS | ||
| 6 | # | ||
| 7 | # AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) | ||
| 8 | # | ||
| 9 | # DESCRIPTION | ||
| 10 | # | ||
| 11 | # Check whether the given FLAG works with the current language's compiler | ||
| 12 | # or gives an error. (Warnings, however, are ignored) | ||
| 13 | # | ||
| 14 | # ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on | ||
| 15 | # success/failure. | ||
| 16 | # | ||
| 17 | # If EXTRA-FLAGS is defined, it is added to the current language's default | ||
| 18 | # flags (e.g. CFLAGS) when the check is done. The check is thus made with | ||
| 19 | # the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to | ||
| 20 | # force the compiler to issue an error when a bad flag is given. | ||
| 21 | # | ||
| 22 | # INPUT gives an alternative input source to AC_COMPILE_IFELSE. | ||
| 23 | # | ||
| 24 | # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this | ||
| 25 | # macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. | ||
| 26 | # | ||
| 27 | # LICENSE | ||
| 28 | # | ||
| 29 | # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> | ||
| 30 | # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> | ||
| 31 | # | ||
| 32 | # This program is free software: you can redistribute it and/or modify it | ||
| 33 | # under the terms of the GNU General Public License as published by the | ||
| 34 | # Free Software Foundation, either version 3 of the License, or (at your | ||
| 35 | # option) any later version. | ||
| 36 | # | ||
| 37 | # This program is distributed in the hope that it will be useful, but | ||
| 38 | # WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 39 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | ||
| 40 | # Public License for more details. | ||
| 41 | # | ||
| 42 | # You should have received a copy of the GNU General Public License along | ||
| 43 | # with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| 44 | # | ||
| 45 | # As a special exception, the respective Autoconf Macro's copyright owner | ||
| 46 | # gives unlimited permission to copy, distribute and modify the configure | ||
| 47 | # scripts that are the output of Autoconf when processing the Macro. You | ||
| 48 | # need not follow the terms of the GNU General Public License when using | ||
| 49 | # or distributing such scripts, even though portions of the text of the | ||
| 50 | # Macro appear in them. The GNU General Public License (GPL) does govern | ||
| 51 | # all other use of the material that constitutes the Autoconf Macro. | ||
| 52 | # | ||
| 53 | # This special exception to the GPL applies to versions of the Autoconf | ||
| 54 | # Macro released by the Autoconf Archive. When you make and distribute a | ||
| 55 | # modified version of the Autoconf Macro, you may extend this special | ||
| 56 | # exception to the GPL to apply to your modified version as well. | ||
| 57 | |||
| 58 | #serial 3 | ||
| 59 | |||
| 60 | AC_DEFUN([AX_CHECK_COMPILE_FLAG], | ||
| 61 | [AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX | ||
| 62 | AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl | ||
| 63 | AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ | ||
| 64 | ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS | ||
| 65 | _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" | ||
| 66 | AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], | ||
| 67 | [AS_VAR_SET(CACHEVAR,[yes])], | ||
| 68 | [AS_VAR_SET(CACHEVAR,[no])]) | ||
| 69 | _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) | ||
| 70 | AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes], | ||
| 71 | [m4_default([$2], :)], | ||
| 72 | [m4_default([$3], :)]) | ||
| 73 | AS_VAR_POPDEF([CACHEVAR])dnl | ||
| 74 | ])dnl AX_CHECK_COMPILE_FLAGS | ||