1 files changed, 11 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/Wcxx-compat-1.c b/gcc-4.9/gcc/testsuite/gcc.dg/Wcxx-compat-1.c
new file mode 100644
index 000000000..91500421e
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/Wcxx-compat-1.c
@@ -0,0 +1,11 @@
+/* PR c/21759  */
+/* { dg-options "-Wc++-compat" } */
+
+int
+main(void)
+{
+   void *p = 0;
+   int *q = p;                  /* { dg-warning "not permitted" } */
+   double* t = (void *)0;
+   return p != q;
+}