diff options
| author | fanquake <fanquake@gmail.com> | 2016-03-19 15:24:00 +0800 |
|---|---|---|
| committer | fanquake <fanquake@gmail.com> | 2016-03-19 15:24:00 +0800 |
| commit | cf5c786fc3244b6aedcc4a2f839f5248f95fafa1 (patch) | |
| tree | 5cdc61abe600b62b3192afe23e52aeac647aca0a /build-aux/m4/ax_check_preproc_flag.m4 | |
| parent | f034bced269c4859809d320dcfbdc4b008191b85 (diff) | |
[build-aux] Update Boost & check macros to latest serials
Diffstat (limited to 'build-aux/m4/ax_check_preproc_flag.m4')
| -rw-r--r-- | build-aux/m4/ax_check_preproc_flag.m4 | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/build-aux/m4/ax_check_preproc_flag.m4 b/build-aux/m4/ax_check_preproc_flag.m4 index b1cfef6b86..ca1d5ee2b6 100644 --- a/build-aux/m4/ax_check_preproc_flag.m4 +++ b/build-aux/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. # @@ -53,19 +55,19 @@ # 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 4 AC_DEFUN([AX_CHECK_PREPROC_FLAG], -[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF 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]) -AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes], +AS_VAR_IF(CACHEVAR,yes, [m4_default([$2], :)], [m4_default([$3], :)]) AS_VAR_POPDEF([CACHEVAR])dnl |