* gcc.dg/cpp/macro8.c: New tests.

From-SVN: r44502

gcc/testsuite/ChangeLog

+2001-07-31  Neil Booth  <neil@cat.daikokuya.demon.co.uk>
+
+	* gcc.dg/cpp/macro8.c: New test.
+
 2001-07-27  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* g++.dg/abi/vbase8-21.C: New test.

gcc/testsuite/gcc.dg/cpp/macro8.c

+/* { dg-do compile } */
+/* { dg-options -std=gnu89 } */
+
+/* GCC 2.95.2 used to get the following variable argument macro
+   expansions wrong.
+
+   Source: Neil Booth, from PR 3852 with persmission.  31 Jul 2001.  */
+
+#define TEST_WORSE(args...) (5, ## args)
+#define TEST_BAD(foo, args...) (2, (foo), ## args)
+
+extern void abort ();
+
+static int add (int a, int b)
+{
+  return a + b;
+}
+
+int main ()
+{
+  /* Would expand to a single closing parenthesis, maybe because of
+     the "no args requires space" brokenness.  */
+  if (TEST_WORSE () != 5)
+    abort ();
+  /* The macro would expand to (0, (0) with a missing closing parenthesis.  */
+  if (add TEST_BAD (5) != 7)
+    abort ();
+  return 0;
+}