posix: add feature_test_macro _GNU_SOURCE to sighandler_t

https://bugzilla.gnome.org/show_bug.cgi?id=761975

diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index 1274a2be313320db15382c973dfc0436a378053a..9ea15edf10ca72be6a74c6fd4a62f18e14138405 100644 (file)
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -1259,7 +1259,7 @@ namespace Posix {
        [CCode (cheader_filename = "signal.h")]
        public int sigaction (int signum, sigaction_t? act, out sigaction_t? oldact);
 
-       [CCode (has_target = false, cheader_filename = "signal.h")]
+       [CCode (has_target = false, cheader_filename = "signal.h", feature_test_macro = "_GNU_SOURCE")]
        public delegate void sighandler_t (int signal);
 
        [CCode (has_target = false, cheader_filename = "signal.h")]