1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/builtins-30.c b/gcc/testsuite/gcc.dg/builtins-30.c
new file mode 100644
index 000000000..37e5dba2d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/builtins-30.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-Wall -Wshadow -fshow-column" } */
+
+extern double strtod (const char *, char **);
+#define UNUSED __attribute__ ((unused))
+
+/* A built-in function may be overridden by an old-style definition
+   specifying too few arguments... */
+double cos ()  /* { dg-warning "shadows a built-in|number of arguments" } */ 
+{
+  return strtod ("nan", 0);
+}
+
+/* the right number, but the wrong type, arguments... */
+double sin (foo)  /* { dg-warning "8:shadows a built-in" } */
+     int foo UNUSED; /* { dg-warning "10:argument 'foo' doesn't match built-in prototype" } */
+{
+  return strtod ("nan", 0);
+}
+
+/* or too many arguments.  */
+long double cosl (foo, bar)  /* { dg-warning "shadows a built-in|number of arguments" } */
+     const char *foo UNUSED; /* { dg-warning "18:argument 'foo' doesn't match" } */
+     int bar UNUSED;
+{
+  return strtod ("nan", 0);
+}