Fix -Warray-parameter warning for __sigsetjmp

Fix the [-Warray-parameter=] warning for __sigsetjmp generated by GCC 11 and
later GCC versions:
|
| warning: argument 1 of type 'struct __jmp_buf_tag *' declared as a pointer [-Warray-parameter=]
|  extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROWNL;
| ...
| note: previously declared as an array 'struct __jmp_buf_tag[1]'
|  extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask)
|

Use the same fix as in glibc. The fix is to move the struct __jmp_buf_tag
definition to a separate bits/ header so it can be included in
pthread.h, to allow to use an array (as in setjmp.h) rather than a pointer
in the declaration.

Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>

include/setjmp.h

@@ -27,21 +27,7 @@
 __BEGIN_DECLS
 
 #include <bits/setjmp.h>		/* Get `__jmp_buf'.  */
-#include <bits/sigset.h>		/* Get `__sigset_t'.  */
-
-
-/* Calling environment, plus possibly a saved signal mask.  */
-struct __jmp_buf_tag
-  {
-    /* NOTE: The machine-dependent definitions of `__sigsetjmp'
-       assume that a `jmp_buf' begins with a `__jmp_buf' and that
-       `__mask_was_saved' follows it.  Do not move these members
-       or add others before it.  */
-    __jmp_buf __jmpbuf;		/* Calling environment.  */
-    int __mask_was_saved;	/* Saved the signal mask?  */
-    __sigset_t __saved_mask;	/* Saved signal mask.  */
-  };
-
+#include <bits/jmp_buf_tag.h>
 
 __BEGIN_NAMESPACE_STD
 

libc/sysdeps/linux/common/bits/jmp_buf_tag.h

@@ -0,0 +1,37 @@
+/* Define struct __jmp_buf_tag.
+   Copyright (C) 1991-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef	__jmp_buf_tag_defined
+#define	__jmp_buf_tag_defined 1
+
+#include <bits/setjmp.h>
+#include <bits/sigset.h>
+
+/* Calling environment, plus possibly a saved signal mask.  */
+struct __jmp_buf_tag
+  {
+    /* NOTE: The machine-dependent definitions of `__sigsetjmp'
+       assume that a `jmp_buf' begins with a `__jmp_buf' and that
+       `__mask_was_saved' follows it.  Do not move these members
+       or add others before it.  */
+    __jmp_buf __jmpbuf;		/* Calling environment.  */
+    int __mask_was_saved;	/* Saved the signal mask?  */
+    __sigset_t __saved_mask;	/* Saved signal mask.  */
+  };
+
+#endif

libpthread/nptl/sysdeps/pthread/pthread.h

@@ -28,6 +28,7 @@
 #include <signal.h>
 #include <bits/pthreadtypes.h>
 #include <bits/setjmp.h>
+#include <bits/jmp_buf_tag.h>
 #include <bits/wordsize.h>
 #if defined _LIBC && ( defined IS_IN_libc || !defined NOT_IN_libc )
 #include <bits/uClibc_pthread.h>
@@ -726,8 +727,7 @@ extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
 #endif
 
 /* Function used in the macros.  */
-struct __jmp_buf_tag;
-extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROWNL;
+extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL;
 
 
 /* Mutex handling.  */