diff options
| -rw-r--r-- | m4/compiler.m4 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/m4/compiler.m4 b/m4/compiler.m4 index 062f93623..058c73f06 100644 --- a/m4/compiler.m4 +++ b/m4/compiler.m4 @@ -21,11 +21,18 @@ AC_DEFUN([UL_WARN_ADD], [ m4_define([warnvarname], m4_default([$2],WARN_CFLAGS)) AS_VAR_PUSHDEF([ul_Warn], [ul_cv_warn_$1])dnl AC_CACHE_CHECK([whether compiler handles $1], m4_defn([ul_Warn]), [ + # store AC_LANG_WERROR status, then turn it on + save_ac_[]_AC_LANG_ABBREV[]_werror_flag="${ac_[]_AC_LANG_ABBREV[]_werror_flag}" + AC_LANG_WERROR + ul_save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="-Werror ${CPPFLAGS} $1" AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], [AS_VAR_SET(ul_Warn, [yes])], [AS_VAR_SET(ul_Warn, [no])]) + # restore AC_LANG_WERROR + ac_[]_AC_LANG_ABBREV[]_werror_flag="${save_ac_[]_AC_LANG_ABBREV[]_werror_flag}" + CPPFLAGS="$ul_save_CPPFLAGS" ]) AS_VAR_IF(ul_Warn, [yes], [UL_AS_VAR_APPEND(warnvarname, [" $1"])]) |