1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/cpp/cmdlne-C.c b/gcc/testsuite/gcc.dg/cpp/cmdlne-C.c
new file mode 100644
index 000000000..2dafec253
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/cmdlne-C.c
@@ -0,0 +1,37 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+/* { dg-options -C } */
+
+/* Test -C doesn't fail with #define.  #define is the tricky case,
+   being the only directive that remembers its comments.
+
+   -C treats comments as tokens in their own right, so e.g. comment at
+   the beginning of a directive turns it into a non-directive.  */
+
+#define simple no comments
+
+#define/**/obj_like/**/(some)/**/thing/**/
+#define fun_like(/**/x/**/,/**/y/**/)/**/
+/**/#define not_a_macro
+
+#if !defined simple || !defined obj_like || !defined fun_like
+#error Missed some macros with -C
+#endif
+
+#ifdef not_a_macro
+#error not_a_macro is!
+#endif
+
+/* Check obj_like doesn't expect arguments, and fun_like does.  */
+obj_like
+fun_like (foo, bar)
+
+/* Check OK to redefine fun_like without comments in the params.  */
+#define fun_like(x, y)/**/
+
+/* Check comments in macros in directives are OK.  */
+#define ZERO 0 /* A trailing comment.  */
+
+#if ZERO
+#endif