1 files changed, 13 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/dremf-type-compat-4.c b/gcc-4.9/gcc/testsuite/gcc.dg/dremf-type-compat-4.c
new file mode 100644
index 000000000..b3a2c5ad5
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/dremf-type-compat-4.c
@@ -0,0 +1,13 @@
+/* Test for bogus diagnostics for dremf definition, as in bug 16666.
+   The GNU extension permitting a prototype to override the promotion
+   of old-style parameter declarations should only apply when the
+   prototype is visible, not for a built-in prototype.  */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+float
+dremf(x, y) /* { dg-warning "conflicting types for built-in function 'dremf'" } */
+     float x, y;
+{
+  return x + y;
+}