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-rw-r--r--m4/ax_gcc_func_attribute.m47
1 files changed, 7 insertions, 0 deletions
diff --git a/m4/ax_gcc_func_attribute.m4 b/m4/ax_gcc_func_attribute.m4
index 4e0ecbb56c5..2e67ea2926d 100644
--- a/m4/ax_gcc_func_attribute.m4
+++ b/m4/ax_gcc_func_attribute.m4
@@ -53,6 +53,7 @@
# optimize
# packed
# pure
+# returns_nonnull
# unused
# used
# visibility
@@ -76,6 +77,9 @@
#serial 2
+# mattst88:
+# Added support for returns_nonnull attribute
+
AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1])
@@ -175,6 +179,9 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
[pure], [
int foo( void ) __attribute__(($1));
],
+ [returns_nonnull], [
+ int *foo( void ) __attribute__(($1));
+ ],
[unused], [
int foo( void ) __attribute__(($1));
],