Index: lib/target-supports.exp
===================================================================
--- lib/target-supports.exp	(revision 193533)
+++ lib/target-supports.exp	(working copy)
@@ -1742,6 +1742,23 @@
     }]
 }
 
+# Return 1 if the target supports 'w' suffix on floating constant
+# 0 otherwise.
+
+proc check_effective_target_has_w_floating_suffix { } {
+    return [check_no_compiler_messages w_fp_suffix object {
+	float dummy = 1.0w;
+    }]
+}
+
+# Return 1 if the target supports 'q' suffix on floating constant
+# 0 otherwise.
+
+proc check_effective_target_has_q_floating_suffix { } {
+    return [check_no_compiler_messages q_fp_suffix object {
+	float dummy = 1.0q;
+    }]
+}
 # Return 1 if the target supports compiling fixed-point,
 # 0 otherwise.
 
Index: g++.dg/cpp0x/gnu_fext-numeric-literals.C
===================================================================
--- g++.dg/cpp0x/gnu_fext-numeric-literals.C	(revision 193533)
+++ g++.dg/cpp0x/gnu_fext-numeric-literals.C	(working copy)
@@ -91,10 +91,10 @@
   auto rfp = 1.0r; // { dg-error "fixed-point types not supported" }
   auto Rfp = 1.0R; // { dg-error "fixed-point types not supported" }
 
-  auto wfp = 1.0w;
-  auto Wfp = 1.0W;
-  auto qfp = 1.0q;
-  auto Qfp = 1.0Q;
+  auto wfp = 1.0w; // { dg-error "unsupported" "" { target { ! has_w_floating_suffix } } }
+  auto Wfp = 1.0W; // { dg-error "unsupported" "" { target { ! has_w_floating_suffix } } }
+  auto qfp = 1.0q; // { dg-error "unsupported" "" { target { ! has_q_floating_suffix } } }
+  auto Qfp = 1.0Q; // { dg-error "unsupported" "" { target { ! has_q_floating_suffix } } }
 }
 
 // { dg-warning "literal operator suffixes not preceded by" "" { target *-*-* } 7 }
Index: g++.dg/cpp0x/std_fext-numeric-literals.C
===================================================================
--- g++.dg/cpp0x/std_fext-numeric-literals.C	(revision 193533)
+++ g++.dg/cpp0x/std_fext-numeric-literals.C	(working copy)
@@ -91,10 +91,10 @@
   auto rfp = 1.0r; // { dg-error "fixed-point types not supported" }
   auto Rfp = 1.0R; // { dg-error "fixed-point types not supported" }
 
-  auto wfp = 1.0w;
-  auto Wfp = 1.0W;
-  auto qfp = 1.0q;
-  auto Qfp = 1.0Q;
+  auto wfp = 1.0w; // { dg-error "unsupported" "" { target { ! has_w_floating_suffix } } }
+  auto Wfp = 1.0W; // { dg-error "unsupported" "" { target { ! has_w_floating_suffix } } }
+  auto qfp = 1.0q; // { dg-error "unsupported" "" { target { ! has_q_floating_suffix } } }
+  auto Qfp = 1.0Q; // { dg-error "unsupported" "" { target { ! has_q_floating_suffix } } }
 }
 
 // { dg-warning "literal operator suffixes not preceded by" "" { target *-*-* } 7 }