diff options
Diffstat (limited to 'config/c-compiler.m4')
| -rw-r--r-- | config/c-compiler.m4 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/config/c-compiler.m4 b/config/c-compiler.m4 index 29db5b16b04..4ba3236ef46 100644 --- a/config/c-compiler.m4 +++ b/config/c-compiler.m4 @@ -242,6 +242,31 @@ undefine([Ac_cachevar])dnl +# PGAC_PROG_CC_VAR_OPT +# ----------------------- +# Given a variable name and a string, check if the compiler supports +# the string as a command-line option. If it does, add the string to +# the given variable. +AC_DEFUN([PGAC_PROG_CC_VAR_OPT], +[define([Ac_cachevar], [AS_TR_SH([pgac_cv_prog_cc_cflags_$2])])dnl +AC_CACHE_CHECK([whether $CC supports $2], [Ac_cachevar], +[pgac_save_CFLAGS=$CFLAGS +CFLAGS="$pgac_save_CFLAGS $2" +ac_save_c_werror_flag=$ac_c_werror_flag +ac_c_werror_flag=yes +_AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], + [Ac_cachevar=yes], + [Ac_cachevar=no]) +ac_c_werror_flag=$ac_save_c_werror_flag +CFLAGS="$pgac_save_CFLAGS"]) +if test x"$Ac_cachevar" = x"yes"; then + $1="${$1} $2" +fi +undefine([Ac_cachevar])dnl +])# PGAC_PROG_CC_CFLAGS_OPT + + + # PGAC_PROG_CC_LDFLAGS_OPT # ------------------------ # Given a string, check if the compiler supports the string as a |