* doc/invoke.texi: Add -Wvariadic-macros.

From-SVN: r78179

gcc/ChangeLog

+2004-02-20  Richard Henderson  <rth@redhat.com>
+
+	* doc/invoke.texi: Add -Wvariadic-macros.
+
 2004-02-20  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* haifa-sched.c (sched_emit_insn): Remove.

gcc/doc/invoke.texi

@@ -232,7 +232,8 @@ in the following sections.
 -Wsystem-headers  -Wtrigraphs  -Wundef  -Wuninitialized @gol
 -Wunknown-pragmas  -Wunreachable-code @gol
 -Wunused  -Wunused-function  -Wunused-label  -Wunused-parameter @gol
--Wunused-value  -Wunused-variable  -Wwrite-strings}
+-Wunused-value  -Wunused-variable  -Wwrite-strings @gol
+-Wvariadic-macros}
 
 @item C-only Warning Options
 @gccoptlist{-Wbad-function-cast  -Wmissing-declarations @gol
@@ -2963,6 +2964,13 @@ the warning messages, use @option{-Wno-long-long}.  Flags
 @option{-Wlong-long} and @option{-Wno-long-long} are taken into account
 only when @option{-pedantic} flag is used.
 
+@item -Wvariadic-macros
+@opindex Wvariadic-macros
+@opindex Wno-variadic-macros
+Warn if variadic macros are used in pedantic ISO C90 mode, or the GNU
+alternate syntax when in pedantic ISO C99 mode.  This is default.
+To inhibit the warning messages, use @option{-Wno-variadic-macros}.
+
 @item -Wdisabled-optimization
 @opindex Wdisabled-optimization
 Warn if a requested optimization pass is disabled.  This warning does

gcc/testsuite/gcc.dg/cpp/Wvariadic-1.c

+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1990 -pedantic -Werror" } */
+
+#define f(x,...)	/* { dg-error "variadic" } */
+#define g(x,y...)	/* { dg-error "variadic" } */
+int not_empty;

gcc/testsuite/gcc.dg/cpp/Wvariadic-2.c

+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1990 -pedantic -Werror -Wno-variadic-macros" } */
+
+#define f(x,...)	/* { dg-bogus "variadic" } */
+#define g(x,y...)	/* { dg-bogus "variadic" } */
+int not_empty;

gcc/testsuite/gcc.dg/cpp/Wvariadic-3.c

+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1999 -pedantic -Werror" } */
+
+#define f(x,...)
+#define g(x,y...)	/* { dg-error "variadic" } */
+int not_empty;

gcc/testsuite/gcc.dg/cpp/Wvariadic-4.c

+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1999 -pedantic -Werror -Wno-variadic-macros" } */
+
+#define f(x,...)
+#define g(x,y...)
+int not_empty;