libstdc++: Sync the atomic_link_flags implementation with GCC.

For Darwin, in order to allow uninstalled testing, we need to provide
a '-B' option pointing to each path containing an uninstalled library
that we are using (these get appended to the embedded runpaths).

This updates the version of the atomic_link_flags proc in the libstdc++
testsuite to do the same as the one in the GCC testsuite.

libstdc++-v3/ChangeLog:

	* testsuite/lib/dg-options.exp (atomic_link_flags): Emit a -B
	option for the path to the uninstalled libatomic.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
(cherry picked from commit 71a44faa8a4f76d68356c66c6054e6c242df820f)

diff --git a/libstdc++-v3/testsuite/lib/dg-options.exp b/libstdc++-v3/testsuite/lib/dg-options.exp
index f7d5b05d6ed7e91c415772e70d7198b8a3375f4c..427a251e789999dadbd15799b35e07aa7e9dc33a 100644 (file)
--- a/libstdc++-v3/testsuite/lib/dg-options.exp
+++ b/libstdc++-v3/testsuite/lib/dg-options.exp
@@ -314,7 +314,7 @@ proc atomic_link_flags { paths } {
       if { [file exists "${gccpath}/libatomic/.libs/libatomic.a"]
            || [file exists "${gccpath}/libatomic/.libs/libatomic.${shlib_ext}"] } {
           append flags " -B${gccpath}/libatomic/ "
-          append flags " -L${gccpath}/libatomic/.libs"
+          append flags " -B${gccpath}/libatomic/.libs"
           append ld_library_path ":${gccpath}/libatomic/.libs"
       }
     } else {