1 files changed, 32 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/enum-compat-1.c b/gcc/testsuite/gcc.dg/enum-compat-1.c
new file mode 100644
index 000000000..5fb150cee
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/enum-compat-1.c
@@ -0,0 +1,32 @@
+/* Test that enumerated types are only considered compatible when they
+   are the same type.  PR c/6024.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk>, based on
+   PR c/6024 from Richard Earnshaw <rearnsha@arm.com> */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+/* Original test from PR c/6024.  */
+enum e1 {a, b};
+enum e2 {c, d};
+
+void f(enum e1); /* { dg-error "prototype" "error at decl" } */
+
+void f(x)
+     enum e2 x; /* { dg-error "doesn't match prototype" } */
+{
+  return;
+}
+
+/* Other compatibility tests.  */
+enum e3 { A };
+enum e4 { B };
+
+enum e3 v3;
+enum e4 *p = &v3; /* { dg-warning "incompatible" "incompatible pointer" } */
+enum e3 *q = &v3;
+
+void g(enum e3); /* { dg-message "note: previous declaration" "error at first decl" } */
+void g(enum e4); /* { dg-error "conflicting types" "error at second decl" } */
+
+void h(enum e3);
+void h(enum e3);