[patch] libstdc++/66829 use -std=gnu++98 to compile testsuite_shared.cc

[Jonathan Wakely]

This file contains some C++98 instantiations that are then compared to
similar instantiations in C++11 tests, so it needs to be compiled with
an explicit -std option now that g++ defaults to gnu++14.

Tested i686-linux, x86_64-linux and ppc64le-linux.

Committed to trunk.


commit 641f48dbc01bb134de1b99414b3ebb4f114d92c0
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Wed Jul 29 14:00:51 2015 +0100

    	PR libstdc++/66829
    	* testsuite/lib/libstdc++.exp (v3-build_support): Compile
    	testsuite_shared.cc with -std=gnu++98.

diff --git a/libstdc++-v3/testsuite/lib/libstdc++.exp b/libstdc++-v3/testsuite/lib/libstdc++.exp
index d60062d..88738b7 100644
--- a/libstdc++-v3/testsuite/lib/libstdc++.exp
+++ b/libstdc++-v3/testsuite/lib/libstdc++.exp
@@ -668,7 +668,7 @@ proc v3-build_support { } {
 	    # Compile with "-w" so that warnings issued by the compiler
 	    # do not prevent compilation.
 	    if { [v3_target_compile $srcdir/util/$f $object_file "sharedlib" \
-	     [list "incdir=$srcdir" "additional_flags=-fno-inline -w -shared -fPIC -DPIC"]]
+	     [list "incdir=$srcdir" "additional_flags=-fno-inline -w -shared -fPIC -DPIC -std=gnu++98"]]
 		 != "" } {
 		error "could not compile $f"
 	    }