diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d1af15437c835d2a2b5d0cfbcbf896918443ff7f..44a575c2896098bccd18ff74a88685e43f287e1e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2010-11-02  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR target/46131
+	* lib/target-supports.exp (add_options_for_tls): Pass -pthread for
+	*-*-osf*.
+
 2010-11-02  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/46184
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 87b234d69ab275f5013162b658efbac70c94ddef..f387d7e72333b052e6221cbcc220814be7da837a 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -613,6 +613,11 @@ proc check_effective_target_pcc_bitfield_type_matters { } {
 # Add to FLAGS all the target-specific flags needed to use thread-local storage.
 
 proc add_options_for_tls { flags } {
+    # Tru64 UNIX uses emutls, which relies on a couple of pthread functions
+    # which only live in libpthread, so always pass -pthread for TLS.
+    if { [istarget *-*-osf*] } {
+	return "$flags -pthread"
+    }
     # On Solaris 8 and 9, __tls_get_addr/___tls_get_addr only lives in
     # libthread, so always pass -pthread for native TLS.
     # Need to duplicate native TLS check from