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| author | Lucas De Marchi <lucas.demarchi@intel.com> | 2015-02-10 10:32:10 -0200 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2015-02-10 10:32:10 -0200 |
| commit | 14c3244f04002380d94903b661b93185c158077b (patch) | |
| tree | a3f54403d3361bfac2bf5b31e43de1be353e5885 | |
| parent | 67466f266d4209744a2f6f3e8e92672110be1df3 (diff) | |
| download | kmod-14c3244f04002380d94903b661b93185c158077b.tar.gz | |
build: define to 0 if builtin is not available
In order to let us use "#if HAVE__BUILTIN_*" without checking if it's
actually define, make sure we define it to 0 in config.h when the
function is not available.
| -rw-r--r-- | m4/attributes.m4 | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4 index db39bf9..7922746 100644 --- a/m4/attributes.m4 +++ b/m4/attributes.m4 @@ -256,7 +256,7 @@ AC_DEFUN([CC_FLAG_VISIBILITY], [ AC_DEFUN([CC_CHECK_FUNC_BUILTIN], [ m4_pushdef([UPNAME], m4_translit([$1], [-a-z], [_A-Z])) - AC_CACHE_CHECK([if compiler has $1 function], + AC_CACHE_CHECK([if compiler has $1 builtin function], [cc_cv_have_$1], [AC_LINK_IFELSE([AC_LANG_PROGRAM([], [ m4_case([$1], @@ -268,9 +268,11 @@ AC_DEFUN([CC_CHECK_FUNC_BUILTIN], [ [cc_cv_have_$1=no])]) AS_IF([test "x$cc_cv_have_$1" = "xyes"], - [AC_DEFINE([HAVE_]m4_defn([UPNAME]), 1, [Define this if the compiler supports $1() function]) + [AC_DEFINE([HAVE_]m4_defn([UPNAME]), 1, [Define to 1 if compiler has $1() builtin function]) $2], - [AS_IF([test "x$3" = "x"], [AC_MSG_ERROR([*** builtin function not found: $1()])], [$3])] + [AS_IF([test "x$3" = "x"], [AC_MSG_ERROR([*** builtin function not found: $1()])], + [AC_DEFINE([HAVE_]m4_defn([UPNAME]), 0) + $3])] ) m4_popdef([UPNAME]) ]) |