[glib] gbacktrace: fix G_BREAKPOINT on Darwin (OSX, iOS)

[Patrick Griffis <pgriffis src gnome org>]

commit 27fae8390946e73e8343a7fd7505796f3599ee23
Author: Ilya Konstantinov <ilya konstantinov gmail com>
Date:   Thu Jun 11 21:42:00 2015 +0300

    gbacktrace: fix G_BREAKPOINT on Darwin (OSX, iOS)
    
    Using __builtin_trap() according to Apple's own documentation:
    
https://developer.apple.com/library/mac/technotes/tn2124/_index.html#//apple_ref/doc/uid/DTS10003391-CH1-SECCONTROLLEDCRASH
    
    https://bugzilla.gnome.org/show_bug.cgi?id=750807

 glib/gbacktrace.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/glib/gbacktrace.h b/glib/gbacktrace.h
index 03b6029..1a4f534 100644
--- a/glib/gbacktrace.h
+++ b/glib/gbacktrace.h
@@ -55,6 +55,8 @@ void g_on_error_stack_trace (const gchar *prg_name);
 #  define G_BREAKPOINT()        G_STMT_START{ __debugbreak(); }G_STMT_END
 #elif defined (__alpha__) && !defined(__osf__) && defined (__GNUC__) && __GNUC__ >= 2
 #  define G_BREAKPOINT()        G_STMT_START{ __asm__ __volatile__ ("bpt"); }G_STMT_END
+#elif defined (__APPLE__)
+#  define G_BREAKPOINT()        G_STMT_START{ __builtin_trap(); }G_STMT_END
 #else   /* !__i386__ && !__alpha__ */
 #  define G_BREAKPOINT()        G_STMT_START{ raise (SIGTRAP); }G_STMT_END
 #endif  /* __i386__ */