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Re: Add gcc-4.9 libgomp symbols requiring --plt-thread-safe for power7

On Tue, Oct 21, 2014 at 05:23:00PM +1030, Alan Modra wrote:
> Found when investigating some intermittent mainline gcc libgomp test
> failures.
> powerpc64 ld builds plt call stubs with a read barrier to provide
> thread safety on lazy plt updates, necessary on multi-threaded apps
> with power7 or later, weakly ordered memory.  gcc-4.9 libgomp
> introduced more functions that could call pthread_create, which means
> we have more functions that if referenced in an executable should
> cause a default of --plt-thread-safe.

This of course is needed for gold too.  Committed 80272b8c.

	* (do_relax): Add gcc-4.9 libgomp functions to

diff --git a/gold/ b/gold/
index 0a9ab7d..828bc16 100644
--- a/gold/
+++ b/gold/
@@ -2708,11 +2708,17 @@ Target_powerpc<size, big_endian>::do_relax(int pass,
 	      /* libanl */
 	      /* libgomp */
+	      "GOMP_parallel",
+	      "GOMP_parallel_loop_static",
+	      "GOMP_parallel_loop_dynamic",
+	      "GOMP_parallel_loop_guided",
+	      "GOMP_parallel_loop_runtime",
+	      "GOMP_parallel_sections",

Alan Modra
Australia Development Lab, IBM

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