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| author | Karl Wette <karl.wette@ligo.org> | 2013-11-24 21:16:24 +0100 |
|---|---|---|
| committer | Peter Simons <simons@cryp.to> | 2013-12-10 21:58:06 +0100 |
| commit | 391cb680171d3889965b1ead43d3a326c913bc25 (patch) | |
| tree | 894f12d74bbdde6b5b31965e2f4fa4fdd698ec54 /m4/ax_check_preproc_flag.m4 | |
| parent | c7d7dedf0402b260c15c175f66a9273494aca2f3 (diff) | |
| download | autoconf-archive-391cb680171d3889965b1ead43d3a326c913bc25.tar.gz | |
AX_CHECK_{PREPROC,COMPILE,LINK}_FLAG: add optional INPUT argument
- for supplying an alternative input source to AC_{PREPROC,COMPILE,LINK}_IFELSE
- defaults to AC_LANG_PROGRAM(), so fully backward-compatible
Diffstat (limited to 'm4/ax_check_preproc_flag.m4')
| -rw-r--r-- | m4/ax_check_preproc_flag.m4 | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/m4/ax_check_preproc_flag.m4 b/m4/ax_check_preproc_flag.m4 index b1cfef6..9a1d5c9 100644 --- a/m4/ax_check_preproc_flag.m4 +++ b/m4/ax_check_preproc_flag.m4 @@ -4,7 +4,7 @@ # # SYNOPSIS # -# AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) # # DESCRIPTION # @@ -19,6 +19,8 @@ # "CPPFLAGS EXTRA-FLAGS FLAG". This can for example be used to force the # preprocessor to issue an error when a bad flag is given. # +# INPUT gives an alternative input source to AC_PREPROC_IFELSE. +# # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this # macro in sync with AX_CHECK_{COMPILE,LINK}_FLAG. # @@ -53,7 +55,7 @@ # 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 +#serial 3 AC_DEFUN([AX_CHECK_PREPROC_FLAG], [AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX @@ -61,7 +63,7 @@ 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()], + AC_PREPROC_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], [AS_VAR_SET(CACHEVAR,[yes])], [AS_VAR_SET(CACHEVAR,[no])]) CPPFLAGS=$ax_check_save_flags]) |