libstdc++.exp (v3-build_support): Delete libtestc++.a before creation.

	* testsuite/lib/libstdc++.exp (v3-build_support): Delete
	libtestc++.a before creation.

From-SVN: r167692

libstdc++-v3/ChangeLog

+2010-12-10  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* testsuite/lib/libstdc++.exp (v3-build_support): Delete
+	libtestc++.a before creation.
+
 2010-12-10  Jack Howarth  <howarth@bromo.med.uc.edu>
 	    Iain Sandoe  <iains@gcc.gnu.org>
 

libstdc++-v3/testsuite/lib/libstdc++.exp

@@ -589,6 +589,15 @@ proc v3-build_support { } {
     }
 
     # Collect into libtestc++.a
+    # Delete libtestc++.a first.  Mixed 32 and 64-bit archives cannot be
+    # linked on IRIX 6.
+    # Use same procedure as gcc-dg.exp (remove-build-file).
+    if [is_remote host] {
+	# Ensure the host knows the file is gone by deleting there
+	# first.
+	remote_file host delete "./libtestc++.a"
+	}
+    remote_file build delete "./libtestc++.a"
     if  [info exists env(AR)] {
 	set ar $env(AR)
     } else {