Avoid testcase build failures with -Wunused-value

A number of testcases fail to build with -Wunused-value enabled.
This commit adds dummy values to avoid this.

gdb/testsuite/ChangeLog:

	* gdb.cp/namespace.cc: Avoid build failure with -Wunused-value.
	* gdb.cp/nsimport.cc: Likewise.
	* gdb.cp/nsnested.cc: Likewise.
	* gdb.cp/nsnoimports.cc: Likewise.
	* gdb.cp/nsusing.cc: Likewise.
	* gdb.cp/smartp.cc: Likewise.
	* gdb.python/py-pp-integral.c: Likewise.
	* gdb.python/py-pp-re-notag.c: Likewise.

1 files changed, 6 insertions, 6 deletions

diff --git a/gdb/testsuite/gdb.cp/nsusing.cc b/gdb/testsuite/gdb.cp/nsusing.cc
index 72ff941..980a91a 100644
--- a/gdb/testsuite/gdb.cp/nsusing.cc
+++ b/gdb/testsuite/gdb.cp/nsusing.cc
@@ -35,7 +35,7 @@ namespace L
   using namespace J;
   int marker8 ()
   {
-    jx;
+    int unused = jx;
     return K::marker9 ();
   }
 }
@@ -53,7 +53,7 @@ namespace I
   int marker7 ()
   {
     using namespace G::H;
-    ghx;
+    int unused = ghx;
     return L::marker8 ();
   }
 }
@@ -69,7 +69,7 @@ namespace E
 using namespace E::F;
 int marker6 ()
 {
-  efx;
+  int unused = efx;
   return I::marker7 ();
 }
 
@@ -92,7 +92,7 @@ namespace D
 using namespace C;
 int marker5 ()
 {
-  cc;
+  int unused = cc;
   return marker6 ();
 }
 
@@ -110,7 +110,7 @@ int marker3 ()
 int marker2 ()
 {
   namespace B = A;
-  B::_a;
+  int unused = B::_a;
   return marker3 ();
 }
 
@@ -134,6 +134,6 @@ int marker1 ()
 int main ()
 {
   using namespace A;
-  _a;
+  int unused = _a;
   return marker1 ();
 }