[PATCH] Fix "warning: missing initializer" warnings with pthread.h *_INITIALIZER*

[Jakub Jelinek <jakub at redhat dot com>]

Hi!

Unfortunately, neither empty initializers are ok for -pedantic
(warning: ISO C forbids empty initializer braces), nor incomplete
initializers (this time for -W):
(warning: missing initializer
 warning: (near initialization for 'mtx_normal.__data.__count'))
and as the macros are usually not used in system headers, the warnings
about this aren't supressed.
This patch just initializes all fields.

2005-07-11  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/pthread/pthread.h (PTHREAD_MUTEX_INITIALIZER,
	PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP,
	PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP,
	PTHREAD_MUTEX_ADAPTIVE_NP, PTHREAD_RWLOCK_INITIALIZER,
	PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP,
	PTHREAD_COND_INITIALIZER): Supply zeros for all fields
	in the structure.
	* Makefile (tests): Add tst-initializers1.
	(CFLAGS-tst-initializers1.c): Set.
	* tst-initializers1.c: New test.

--- libc/nptl/sysdeps/pthread/pthread.h.jj	2005-05-04 10:24:56.000000000 +0200
+++ libc/nptl/sysdeps/pthread/pthread.h	2005-07-11 10:42:22.000000000 +0200
@@ -62,22 +62,22 @@ enum
 
 /* Mutex initializers.  */
 #define PTHREAD_MUTEX_INITIALIZER \
-  { { 0, } }
+  { { 0, 0, 0, 0, 0, 0 } }
 #ifdef __USE_GNU
 # if __WORDSIZE == 64
 #  define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP } }
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0 } }
 #  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP } }
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0 } }
 #  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP } }
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0 } }
 # else
 #  define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP } }
+  { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, 0 } }
 #  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP } }
+  { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, 0 } }
 #  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP } }
+  { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, 0 } }
 # endif
 #endif
 
@@ -93,8 +93,13 @@ enum
 };
 
 /* Read-write lock initializers.  */
-# define PTHREAD_RWLOCK_INITIALIZER \
-  { { 0, } }
+# if __WORDSIZE == 64
+#  define PTHREAD_RWLOCK_INITIALIZER \
+  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }
+# else
+#  define PTHREAD_RWLOCK_INITIALIZER \
+  { { 0, 0, 0, 0, 0, 0, 0, 0 } }
+# endif
 # ifdef __USE_GNU
 #  if __WORDSIZE == 64
 #   define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \
@@ -102,7 +107,7 @@ enum
       PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } }
 #  else
 #   define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \
-  { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } }
+  { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 0 } }
 #  endif
 # endif
 #endif  /* Unix98 or XOpen2K */
@@ -140,7 +145,7 @@ enum
 
 
 /* Conditional variable handling.  */
-#define PTHREAD_COND_INITIALIZER { { 0, } }
+#define PTHREAD_COND_INITIALIZER { { 0, 0, 0, 0, 0, (void *) 0, 0, 0 } }
 
 
 /* Cleanup buffers */
--- libc/nptl/tst-initializers1.c.jj	2005-07-11 10:43:16.000000000 +0200
+++ libc/nptl/tst-initializers1.c	2005-07-11 10:52:11.000000000 +0200
@@ -0,0 +1,48 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <pthread.h>
+
+pthread_mutex_t mtx_normal = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t mtx_recursive = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+pthread_mutex_t mtx_errorchk = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP;
+pthread_mutex_t mtx_adaptive = PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP;
+pthread_rwlock_t rwl_normal = PTHREAD_RWLOCK_INITIALIZER;
+pthread_rwlock_t rwl_writer
+  = PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP;
+pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+
+int
+main (void)
+{
+  if (mtx_normal.__data.__kind != PTHREAD_MUTEX_TIMED_NP)
+    return 1;
+  if (mtx_recursive.__data.__kind != PTHREAD_MUTEX_RECURSIVE_NP)
+    return 1;
+  if (mtx_errorchk.__data.__kind != PTHREAD_MUTEX_ERRORCHECK_NP)
+    return 1;
+  if (mtx_adaptive.__data.__kind != PTHREAD_MUTEX_ADAPTIVE_NP)
+    return 1;
+  if (rwl_normal.__data.__flags != PTHREAD_RWLOCK_PREFER_READER_NP)
+    return 1;
+  if (rwl_writer.__data.__flags
+      != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)
+    return 1;
+  return 0;
+}
--- libc/nptl/Makefile.jj	2005-07-04 10:16:54.000000000 +0200
+++ libc/nptl/Makefile	2005-07-11 10:54:40.000000000 +0200
@@ -241,7 +241,7 @@ tests = tst-attr1 tst-attr2 tst-attr3 \
 	tst-backtrace1 \
 	tst-oddstacklimit \
 	tst-vfork1 tst-vfork2 tst-vfork1x tst-vfork2x \
-	tst-getpid1 tst-getpid2
+	tst-getpid1 tst-getpid2 tst-initializers1
 xtests = tst-setuid1 tst-setuid1-static
 
 # Files which must not be linked with libpthread.
@@ -412,6 +412,7 @@ CFLAGS-tst-cleanupx4.c += -fexceptions
 CFLAGS-tst-oncex3.c += -fexceptions
 CFLAGS-tst-oncex4.c += -fexceptions
 CFLAGS-tst-align.c += $(stack-align-test-flags)
+CFLAGS-tst-initializers1.c += -W -Wall -Werror
 
 tst-cancel7-ARGS = --command "$(built-program-cmd)"
 tst-cancelx7-ARGS = $(tst-cancel7-ARGS)

	Jakub