1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/builtin5.C b/gcc/testsuite/g++.dg/ext/builtin5.C
new file mode 100644
index 000000000..051224ffd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/builtin5.C
@@ -0,0 +1,12 @@
+// Verify that builtin is used when declared in namespace std
+
+// { dg-do compile }
+// { dg-options "-Wall" }
+
+namespace std {
+  extern "C" int printf(const char*,...);
+}
+
+void foo() {
+  std::printf("%d"); 		// { dg-warning "expects a matching" }
+}