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Updated with AC_LANG_SOURCE directives

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Please see this informative thread on bug-autoconf:
http://www.mail-archive.com/bug-autoconf@gnu.org/msg03052.html
This commit is contained in:
Extravagant
2012-02-12 22:23:40 +00:00
parent ba30dcd7cf
commit f1852cd222
3 changed files with 55 additions and 56 deletions
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scripts/attributes.m4
+14 -14
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@@ -3,10 +3,10 @@
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
AC_CACHE_CHECK([if compiler supports __attribute__((constructor))],
[cc_cv_attribute_constructor],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
void ctor() __attribute__((constructor));
void ctor() { };
],
])],
[cc_cv_attribute_constructor=yes],
[cc_cv_attribute_constructor=no])
])
@@ -23,9 +23,9 @@ AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
AC_CACHE_CHECK([if compiler supports __attribute__((format(printf, n, n)))],
[cc_cv_attribute_format],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { }
],
])],
[cc_cv_attribute_format=yes],
[cc_cv_attribute_format=no])
])
@@ -42,9 +42,9 @@ AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
AC_DEFUN([CC_ATTRIBUTE_INTERNAL], [
AC_CACHE_CHECK([if compiler supports __attribute__((visibility("internal")))],
[cc_cv_attribute_internal],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
void __attribute__((visibility("internal"))) internal_function() { }
],
])],
[cc_cv_attribute_internal=yes],
[cc_cv_attribute_internal=no])
])
@@ -66,9 +66,9 @@ AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
AC_CACHE_CHECK([if compiler supports __attribute__((visibility("default")))],
[cc_cv_attribute_visibility],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
void __attribute__((visibility("default"))) visibility_function() { }
],
])],
[cc_cv_attribute_visibility=yes],
[cc_cv_attribute_visibility=no])
])
@@ -90,10 +90,10 @@ AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
AC_CACHE_CHECK([if compiler supports __attribute__((nonnull()))],
[cc_cv_attribute_nonnull],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
void some_function(void *foo, void *bar) __attribute__((nonnull()));
void some_function(void *foo, void *bar) { }
],
])],
[cc_cv_attribute_nonnull=yes],
[cc_cv_attribute_nonnull=no])
])
@@ -110,9 +110,9 @@ AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
AC_CACHE_CHECK([if compiler supports __attribute__((unused))],
[cc_cv_attribute_unused],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
void some_function(void *foo, __attribute__((unused)) void *bar);
],
])],
[cc_cv_attribute_unused=yes],
[cc_cv_attribute_unused=no])
])
@@ -129,13 +129,13 @@ AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
AC_DEFUN([CC_FUNC_EXPECT], [
AC_CACHE_CHECK([if compiler has __builtin_expect function],
[cc_cv_func_expect],
[AC_COMPILE_IFELSE([
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
int some_function()
{
int a = 3;
return (int)__builtin_expect(a, 3);
}
],
])],
[cc_cv_func_expect=yes],
[cc_cv_func_expect=no])
])