Patch to diagnostic for data definitions without declspecs

["Joseph S. Myers" <jsm at polyomino dot org dot uk>]

Declarations at top level such as "foo();" receive from the present C
parser a warning which becomes an error with -pedantic.  This is a
misuse of pedantic; it is -pedantic-errors which should change
warnings into errors, not -pedantic.  This patch accordingly fixes
this to be an unconditional pedwarn instead; the corresponding change
I've made to my new parser gets rid of one further ??? comment.

Bootstrapped with no regressions on i686-pc-linux-gnu.  Applied to
mainline.

-- 
Joseph S. Myers               http://www.srcf.ucam.org/~jsm28/gcc/
    jsm@polyomino.org.uk (personal mail)
    joseph@codesourcery.com (CodeSourcery mail)
    jsm28@gcc.gnu.org (Bugzilla assignments and CCs)

2004-10-26  Joseph S. Myers  <jsm@polyomino.org.uk>

	* c-parse.in (datadef): Use pedwarn rather than error and warning
	for diagnostic in case of no declaration specifiers.

testsuite:
2004-10-26  Joseph S. Myers  <jsm@polyomino.org.uk>

	* gcc.dg/decl-nospec-1.c, gcc.dg/decl-nospec-2.c,
	gcc.dg/decl-nospec-3.c: New tests.

diff -rupN GCC.orig/gcc/c-parse.in GCC/gcc/c-parse.in
--- GCC.orig/gcc/c-parse.in	2004-10-26 16:28:08.000000000 +0000
+++ GCC/gcc/c-parse.in	2004-10-26 16:31:22.000000000 +0000
@@ -407,11 +407,7 @@ save_obstack_position:
 
 datadef:
 	  setspecs notype_initdecls ';'
-		{ if (pedantic)
-		    error ("ISO C forbids data definition with no type or storage class");
-		  else
-		    warning ("data definition has no type or storage class");
-
+		{ pedwarn ("data definition has no type or storage class");
 		  POP_DECLSPEC_STACK; }
         | declspecs_nots setspecs notype_initdecls ';'
 		{ POP_DECLSPEC_STACK; }
diff -rupN GCC.orig/gcc/testsuite/gcc.dg/decl-nospec-1.c GCC/gcc/testsuite/gcc.dg/decl-nospec-1.c
--- GCC.orig/gcc/testsuite/gcc.dg/decl-nospec-1.c	1970-01-01 00:00:00.000000000 +0000
+++ GCC/gcc/testsuite/gcc.dg/decl-nospec-1.c	2004-10-26 16:34:09.000000000 +0000
@@ -0,0 +1,8 @@
+/* Data definition with no type or storage class should receive a
+   pedwarn, rather than a warning which becomes an error with
+   -pedantic.  Test with no options.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+foo(); /* { dg-warning "warning: data definition has no type or storage class" } */
diff -rupN GCC.orig/gcc/testsuite/gcc.dg/decl-nospec-2.c GCC/gcc/testsuite/gcc.dg/decl-nospec-2.c
--- GCC.orig/gcc/testsuite/gcc.dg/decl-nospec-2.c	1970-01-01 00:00:00.000000000 +0000
+++ GCC/gcc/testsuite/gcc.dg/decl-nospec-2.c	2004-10-26 16:34:34.000000000 +0000
@@ -0,0 +1,8 @@
+/* Data definition with no type or storage class should receive a
+   pedwarn, rather than a warning which becomes an error with
+   -pedantic.  Test with -pedantic.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "-pedantic" } */
+
+foo(); /* { dg-warning "warning: data definition has no type or storage class" } */
diff -rupN GCC.orig/gcc/testsuite/gcc.dg/decl-nospec-3.c GCC/gcc/testsuite/gcc.dg/decl-nospec-3.c
--- GCC.orig/gcc/testsuite/gcc.dg/decl-nospec-3.c	1970-01-01 00:00:00.000000000 +0000
+++ GCC/gcc/testsuite/gcc.dg/decl-nospec-3.c	2004-10-26 16:34:55.000000000 +0000
@@ -0,0 +1,8 @@
+/* Data definition with no type or storage class should receive a
+   pedwarn, rather than a warning which becomes an error with
+   -pedantic.  Test with -pedantic-errors.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "-pedantic-errors" } */
+
+foo(); /* { dg-error "error: data definition has no type or storage class" } */