Update gnulib to current upstream master

2015-08-24  Pedro Alves  <palves@redhat.com>

	* gnulib/update-gnulib.sh (GNULIB_COMMIT_SHA1): Set to
	1029a8112290f6eee9d7878a391c49db42c999bd.
	* gnulib/configure, gnulib/config.in, gnulib/aclocal.m4:
	Regenerate.
	* gnulib/import/Makefile.am: Update.
	* gnulib/import/Makefile.in: Update.
	* gnulib/import/alloca.in.h: Update.
	* gnulib/import/basename-lgpl.c: Update.
	* gnulib/import/canonicalize-lgpl.c: Update.
	* gnulib/import/config.charset: Update.
	* gnulib/import/dirent.in.h: Update.
	* gnulib/import/dirfd.c: Update.
	* gnulib/import/dirname-lgpl.c: Update.
	* gnulib/import/dirname.h: Update.
	* gnulib/import/dosname.h: Update.
	* gnulib/import/errno.in.h: Update.
	* gnulib/import/extra/snippet/arg-nonnull.h: Update.
	* gnulib/import/extra/snippet/c++defs.h: Update.
	* gnulib/import/extra/snippet/warn-on-use.h: Update.
	* gnulib/import/extra/update-copyright: Update.
	* gnulib/import/float+.h: Update.
	* gnulib/import/float.c: Update.
	* gnulib/import/float.in.h: Update.
	* gnulib/import/fnmatch.c: Update.
	* gnulib/import/fnmatch.in.h: Update.
	* gnulib/import/fnmatch_loop.c: Update.
	* gnulib/import/fpucw.h: Update.
	* gnulib/import/frexp.c: Update.
	* gnulib/import/frexpl.c: Update.
	* gnulib/import/gettimeofday.c: Update.
	* gnulib/import/inttypes.in.h: Update.
	* gnulib/import/isnan.c: Update.
	* gnulib/import/isnand-nolibm.h: Update.
	* gnulib/import/isnand.c: Update.
	* gnulib/import/isnanl-nolibm.h: Update.
	* gnulib/import/isnanl.c: Update.
	* gnulib/import/itold.c: Update.
	* gnulib/import/localcharset.c: Update.
	* gnulib/import/localcharset.h: Update.
	* gnulib/import/lstat.c: Update.
	* gnulib/import/m4/00gnulib.m4: Update.
	* gnulib/import/m4/absolute-header.m4: Update.
	* gnulib/import/m4/alloca.m4: Update.
	* gnulib/import/m4/canonicalize.m4: Update.
	* gnulib/import/m4/codeset.m4: Update.
	* gnulib/import/m4/configmake.m4: Update.
	* gnulib/import/m4/dirent_h.m4: Update.
	* gnulib/import/m4/dirfd.m4: Update.
	* gnulib/import/m4/dirname.m4: Update.
	* gnulib/import/m4/double-slash-root.m4: Update.
	* gnulib/import/m4/eealloc.m4: Update.
	* gnulib/import/m4/errno_h.m4: Update.
	* gnulib/import/m4/exponentd.m4: Update.
	* gnulib/import/m4/exponentl.m4: Update.
	* gnulib/import/m4/extensions.m4: Update.
	* gnulib/import/m4/extern-inline.m4: Update.
	* gnulib/import/m4/fcntl-o.m4: Update.
	* gnulib/import/m4/float_h.m4: Update.
	* gnulib/import/m4/fnmatch.m4: Update.
	* gnulib/import/m4/fpieee.m4: Update.
	* gnulib/import/m4/frexp.m4: Update.
	* gnulib/import/m4/frexpl.m4: Update.
	* gnulib/import/m4/gettimeofday.m4: Update.
	* gnulib/import/m4/glibc21.m4: Update.
	* gnulib/import/m4/gnulib-cache.m4: Update.
	* gnulib/import/m4/gnulib-common.m4: Update.
	* gnulib/import/m4/gnulib-comp.m4: Update.
	* gnulib/import/m4/gnulib-tool.m4: Update.
	* gnulib/import/m4/include_next.m4: Update.
	* gnulib/import/m4/inttypes-pri.m4: Update.
	* gnulib/import/m4/inttypes.m4: Update.
	* gnulib/import/m4/isnand.m4: Update.
	* gnulib/import/m4/isnanl.m4: Update.
	* gnulib/import/m4/largefile.m4: Update.
	* gnulib/import/m4/localcharset.m4: Update.
	* gnulib/import/m4/locale-fr.m4: Update.
	* gnulib/import/m4/locale-ja.m4: Update.
	* gnulib/import/m4/locale-zh.m4: Update.
	* gnulib/import/m4/longlong.m4: Update.
	* gnulib/import/m4/lstat.m4: Update.
	* gnulib/import/m4/malloc.m4: Update.
	* gnulib/import/m4/malloca.m4: Update.
	* gnulib/import/m4/math_h.m4: Update.
	* gnulib/import/m4/mbrtowc.m4: Update.
	* gnulib/import/m4/mbsinit.m4: Update.
	* gnulib/import/m4/mbsrtowcs.m4: Update.
	* gnulib/import/m4/mbstate_t.m4: Update.
	* gnulib/import/m4/memchr.m4: Update.
	* gnulib/import/m4/memmem.m4: Update.
	* gnulib/import/m4/mmap-anon.m4: Update.
	* gnulib/import/m4/multiarch.m4: Update.
	* gnulib/import/m4/nocrash.m4: Update.
	* gnulib/import/m4/off_t.m4: Update.
	* gnulib/import/m4/pathmax.m4: Update.
	* gnulib/import/m4/readlink.m4: Update.
	* gnulib/import/m4/rename.m4: Update.
	* gnulib/import/m4/rmdir.m4: Update.
	* gnulib/import/m4/ssize_t.m4: Update.
	* gnulib/import/m4/stat.m4: Update.
	* gnulib/import/m4/stdbool.m4: Update.
	* gnulib/import/m4/stddef_h.m4: Update.
	* gnulib/import/m4/stdint.m4: Update.
	* gnulib/import/m4/stdio_h.m4: Update.
	* gnulib/import/m4/stdlib_h.m4: Update.
	* gnulib/import/m4/string_h.m4: Update.
	* gnulib/import/m4/strstr.m4: Update.
	* gnulib/import/m4/strtok_r.m4: Update.
	* gnulib/import/m4/sys_socket_h.m4: Update.
	* gnulib/import/m4/sys_stat_h.m4: Update.
	* gnulib/import/m4/sys_time_h.m4: Update.
	* gnulib/import/m4/sys_types_h.m4: Update.
	* gnulib/import/m4/time_h.m4: Update.
	* gnulib/import/m4/unistd_h.m4: Update.
	* gnulib/import/m4/warn-on-use.m4: Update.
	* gnulib/import/m4/wchar_h.m4: Update.
	* gnulib/import/m4/wchar_t.m4: Update.
	* gnulib/import/m4/wctype_h.m4: Update.
	* gnulib/import/m4/wint_t.m4: Update.
	* gnulib/import/malloc.c: Update.
	* gnulib/import/malloca.c: Update.
	* gnulib/import/malloca.h: Update.
	* gnulib/import/math.in.h: Update.
	* gnulib/import/mbrtowc.c: Update.
	* gnulib/import/mbsinit.c: Update.
	* gnulib/import/mbsrtowcs-impl.h: Update.
	* gnulib/import/mbsrtowcs-state.c: Update.
	* gnulib/import/mbsrtowcs.c: Update.
	* gnulib/import/memchr.c: Update.
	* gnulib/import/memmem.c: Update.
	* gnulib/import/pathmax.h: Update.
	* gnulib/import/readlink.c: Update.
	* gnulib/import/ref-add.sin: Update.
	* gnulib/import/ref-del.sin: Update.
	* gnulib/import/rename.c: Update.
	* gnulib/import/rmdir.c: Update.
	* gnulib/import/same-inode.h: Update.
	* gnulib/import/stat.c: Update.
	* gnulib/import/stdbool.in.h: Update.
	* gnulib/import/stddef.in.h: Update.
	* gnulib/import/stdint.in.h: Update.
	* gnulib/import/stdio.c: Update.
	* gnulib/import/stdio.in.h: Update.
	* gnulib/import/stdlib.in.h: Update.
	* gnulib/import/str-two-way.h: Update.
	* gnulib/import/streq.h: Update.
	* gnulib/import/string.in.h: Update.
	* gnulib/import/stripslash.c: Update.
	* gnulib/import/strnlen1.c: Update.
	* gnulib/import/strnlen1.h: Update.
	* gnulib/import/strstr.c: Update.
	* gnulib/import/strtok_r.c: Update.
	* gnulib/import/sys_stat.in.h: Update.
	* gnulib/import/sys_time.in.h: Update.
	* gnulib/import/sys_types.in.h: Update.
	* gnulib/import/time.in.h: Update.
	* gnulib/import/unistd.in.h: Update.
	* gnulib/import/verify.h: Update.
	* gnulib/import/wchar.in.h: Update.
	* gnulib/import/wctype.in.h: Update.
	* gnulib/import/gettimeofday.c: New file.
	* gnulib/import/m4/absolute-header.m4: New file.
	* gnulib/import/m4/gettimeofday.m4: New file.
	* gnulib/import/m4/sys_socket_h.m4: New file.
	* gnulib/import/m4/sys_time_h.m4: New file.
	* gnulib/import/stdio.c: Delete file.
	* gnulib/import/sys_time.in.h: New file.

1 files changed, 151 insertions, 54 deletions

diff --git a/gdb/gnulib/config.in b/gdb/gnulib/config.in
index 8201b6d..048b9a7 100644
--- a/gdb/gnulib/config.in
+++ b/gdb/gnulib/config.in
@@ -50,6 +50,13 @@
    and handles trailing slash correctly. */
 #undef FUNC_REALPATH_WORKS
 
+/* Define if gettimeofday clobbers the localtime buffer. */
+#undef GETTIMEOFDAY_CLOBBERS_LOCALTIME
+
+/* Define this to 'void' or 'struct timezone' to match the system's
+   declaration of the second argument to gettimeofday. */
+#undef GETTIMEOFDAY_TIMEZONE
+
 /* Define to a C preprocessor expression that evaluates to 1 or 0, depending
    whether the gnulib module canonicalize-lgpl shall be considered present. */
 #undef GNULIB_CANONICALIZE_LGPL
@@ -58,6 +65,10 @@
    whether the gnulib module fscanf shall be considered present. */
 #undef GNULIB_FSCANF
 
+/* Define to 1 if printf and friends should be labeled with attribute
+   "__gnu_printf__" instead of "__printf__" */
+#undef GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
+
 /* Define to a C preprocessor expression that evaluates to 1 or 0, depending
    whether the gnulib module scanf shall be considered present. */
 #undef GNULIB_SCANF
@@ -78,6 +89,9 @@
 /* Define to 1 when the gnulib module frexpl should be tested. */
 #undef GNULIB_TEST_FREXPL
 
+/* Define to 1 when the gnulib module gettimeofday should be tested. */
+#undef GNULIB_TEST_GETTIMEOFDAY
+
 /* Define to 1 when the gnulib module lstat should be tested. */
 #undef GNULIB_TEST_LSTAT
 
@@ -120,9 +134,6 @@
 /* Define to 1 when the gnulib module strtok_r should be tested. */
 #undef GNULIB_TEST_STRTOK_R
 
-/* Define to 1 if you have the `alarm' function. */
-#undef HAVE_ALARM
-
 /* Define to 1 if you have 'alloca' after including <alloca.h>, a header that
    may be supplied by this distribution. */
 #undef HAVE_ALLOCA
@@ -140,6 +151,10 @@
 /* Define to 1 if you have the `canonicalize_file_name' function. */
 #undef HAVE_CANONICALIZE_FILE_NAME
 
+/* Define to 1 if you have the declaration of `alarm', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ALARM
+
 /* Define to 1 if you have the declaration of `dirfd', and to 0 if you don't.
    */
 #undef HAVE_DECL_DIRFD
@@ -194,6 +209,9 @@
 /* Define to 1 if you have the `getcwd' function. */
 #undef HAVE_GETCWD
 
+/* Define to 1 if you have the `gettimeofday' function. */
+#undef HAVE_GETTIMEOFDAY
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
@@ -502,6 +520,9 @@
 /* Define to 1 if getsubopt is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_GETSUBOPT
 
+/* Define to 1 if gettimeofday is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_GETTIMEOFDAY
+
 /* Define to 1 if getusershell is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_GETUSERSHELL
 
@@ -772,6 +793,9 @@
 /* Define to 1 if scandir is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_SCANDIR
 
+/* Define to 1 if secure_getenv is declared even after undefining macros. */
+#undef HAVE_RAW_DECL_SECURE_GETENV
+
 /* Define to 1 if setenv is declared even after undefining macros. */
 #undef HAVE_RAW_DECL_SETENV
 
@@ -1087,9 +1111,15 @@
 /* Define to 1 if you have the <sys/param.h> header file. */
 #undef HAVE_SYS_PARAM_H
 
+/* Define to 1 if you have the <sys/socket.h> header file. */
+#undef HAVE_SYS_SOCKET_H
+
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
+/* Define to 1 if you have the <sys/timeb.h> header file. */
+#undef HAVE_SYS_TIMEB_H
+
 /* Define to 1 if you have the <sys/time.h> header file. */
 #undef HAVE_SYS_TIME_H
 
@@ -1114,6 +1144,9 @@
 /* Define to 1 if you have the <wctype.h> header file. */
 #undef HAVE_WCTYPE_H
 
+/* Define to 1 if you have the <winsock2.h> header file. */
+#undef HAVE_WINSOCK2_H
+
 /* Define if you have the 'wint_t' type. */
 #undef HAVE_WINT_T
 
@@ -1135,6 +1168,9 @@
 /* Define to 1 if the system has the type `_Bool'. */
 #undef HAVE__BOOL
 
+/* Define to 1 if you have the `_ftime' function. */
+#undef HAVE__FTIME
+
 /* Define as the bit index in the word where to find bit 0 of the exponent of
    'long double'. */
 #undef LDBL_EXPBIT0_BIT
@@ -1152,6 +1188,10 @@
 /* Define to a substitute value for mmap()'s MAP_ANONYMOUS flag. */
 #undef MAP_ANONYMOUS
 
+/* Define if the mbrtowc function does not return (size_t) -2 for empty input.
+   */
+#undef MBRTOWC_EMPTY_INPUT_BUG
+
 /* Define if the mbrtowc function has the NULL pwc argument bug. */
 #undef MBRTOWC_NULL_ARG1_BUG
 
@@ -1238,6 +1278,42 @@
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable general extensions on OS X.  */
+#ifndef _DARWIN_C_SOURCE
+# undef _DARWIN_C_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable X/Open extensions if necessary.  HP-UX 11.11 defines
+   mbstate_t only if _XOPEN_SOURCE is defined to 500, regardless of
+   whether compiling with -Ae or -D_HPUX_SOURCE=1.  */
+#ifndef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+
+
 /* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
    'wchar_t'. */
 #undef WCHAR_T_SUFFIX
@@ -1258,10 +1334,8 @@
 # endif
 #endif
 
-/* Enable large inode numbers on Mac OS X.  */
-#ifndef _DARWIN_USE_64_BIT_INODE
-# define _DARWIN_USE_64_BIT_INODE 1
-#endif
+/* Enable large inode numbers on Mac OS X 10.5. */
+#undef _DARWIN_USE_64_BIT_INODE
 
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
@@ -1276,6 +1350,9 @@
 /* Define to 1 if on MINIX. */
 #undef _MINIX
 
+/* Define to 1 to make NetBSD features available. MINIX 3 needs this. */
+#undef _NETBSD_SOURCE
+
 /* The _Noreturn keyword of C11.  */
 #if ! (defined _Noreturn \
        || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__))
@@ -1297,69 +1374,79 @@
 /* Define to 1 if you need to in order for 'stat' and other things to work. */
 #undef _POSIX_SOURCE
 
-/* Define to 500 only on HP-UX. */
-#undef _XOPEN_SOURCE
-
-/* Enable extensions on AIX 3, Interix.  */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-/* Enable general extensions on Mac OS X.  */
-#ifndef _DARWIN_C_SOURCE
-# undef _DARWIN_C_SOURCE
-#endif
-/* Enable GNU extensions on systems that have them.  */
-#ifndef _GNU_SOURCE
-# undef _GNU_SOURCE
-#endif
-/* Enable threading extensions on Solaris.  */
-#ifndef _POSIX_PTHREAD_SEMANTICS
-# undef _POSIX_PTHREAD_SEMANTICS
-#endif
-/* Enable extensions on HP NonStop.  */
-#ifndef _TANDEM_SOURCE
-# undef _TANDEM_SOURCE
+/* Please see the Gnulib manual for how to use these macros.
+
+   Suppress extern inline with HP-UX cc, as it appears to be broken; see
+   <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
+
+   Suppress extern inline with Sun C in standards-conformance mode, as it
+   mishandles inline functions that call each other.  E.g., for 'inline void f
+   (void) { } inline void g (void) { f (); }', c99 incorrectly complains
+   'reference to static identifier "f" in extern inline function'.
+   This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16.
+
+   Suppress extern inline (with or without __attribute__ ((__gnu_inline__)))
+   on configurations that mistakenly use 'static inline' to implement
+   functions or macros in standard C headers like <ctype.h>.  For example,
+   if isdigit is mistakenly implemented via a static inline function,
+   a program containing an extern inline function that calls isdigit
+   may not work since the C standard prohibits extern inline functions
+   from calling static functions.  This bug is known to occur on:
+
+     OS X 10.8 and earlier; see:
+     http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html
+
+     DragonFly; see
+     http://muscles.dragonflybsd.org/bulk/bleeding-edge-potential/latest-per-pkg/ah-tty-0.3.12.log
+
+     FreeBSD; see:
+     http://lists.gnu.org/archive/html/bug-gnulib/2014-07/msg00104.html
+
+   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
+   for clang but remains for g++; see <http://trac.macports.org/ticket/41033>.
+   Assume DragonFly and FreeBSD will be similar.  */
+#if (((defined __APPLE__ && defined __MACH__) \
+      || defined __DragonFly__ || defined __FreeBSD__) \
+     && (defined __header_inline \
+         ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \
+            && ! defined __clang__) \
+         : ((! defined _DONT_USE_CTYPE_INLINE_ \
+             && (defined __GNUC__ || defined __cplusplus)) \
+            || (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \
+                && defined __GNUC__ && ! defined __cplusplus))))
+# define _GL_EXTERN_INLINE_STDHEADER_BUG
 #endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
-#endif
-
-
-/* _GL_INLINE is a portable alternative to ISO C99 plain 'inline'.
-   _GL_EXTERN_INLINE is a portable alternative to 'extern inline'.
-   _GL_INLINE_HEADER_BEGIN contains useful stuff to put
-     in an include file, before uses of _GL_INLINE.
-     It suppresses GCC's bogus "no previous prototype for 'FOO'" diagnostic,
-     when FOO is an inline function in the header; see
-     <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>.
-   _GL_INLINE_HEADER_END contains useful stuff to put
-     in the same include file, after uses of _GL_INLINE.
-
-   Suppress the use of extern inline on Apple's platforms,
-   as Libc-825.25 (2012-09-19) is incompatible with it; see
-   <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
-   Perhaps Apple will fix this some day.  */
 #if ((__GNUC__ \
       ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
-      : 199901L <= __STDC_VERSION__) \
-     && !defined __APPLE__)
+      : (199901L <= __STDC_VERSION__ \
+         && !defined __HP_cc \
+         && !(defined __SUNPRO_C && __STDC__))) \
+     && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
 # define _GL_INLINE inline
 # define _GL_EXTERN_INLINE extern inline
-#elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __APPLE__
-# if __GNUC_GNU_INLINE__
+# define _GL_EXTERN_INLINE_IN_USE
+#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
+       && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
+# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__
    /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
 #  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
 # else
 #  define _GL_INLINE extern inline
 # endif
 # define _GL_EXTERN_INLINE extern
+# define _GL_EXTERN_INLINE_IN_USE
 #else
 # define _GL_INLINE static _GL_UNUSED
 # define _GL_EXTERN_INLINE static _GL_UNUSED
 #endif
 
-#if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
+/* In GCC 4.6 (inclusive) to 5.1 (exclusive),
+   suppress bogus "no previous prototype for 'FOO'"
+   and "no previous declaration for 'FOO'" diagnostics,
+   when FOO is an inline function in the header; see
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113> and
+   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63877>.  */
+#if __GNUC__ == 4 && 6 <= __GNUC_MINOR__
 # if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
 #  define _GL_INLINE_HEADER_CONST_PRAGMA
 # else
@@ -1432,6 +1519,16 @@
    is a misnomer outside of parameter lists.  */
 #define _UNUSED_PARAMETER_ _GL_UNUSED
 
+/* gcc supports the "unused" attribute on possibly unused labels, and
+   g++ has since version 4.5.  Note to support C++ as well as C,
+   _GL_UNUSED_LABEL should be used with a trailing ;  */
+#if !defined __cplusplus || __GNUC__ > 4 \
+    || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+# define _GL_UNUSED_LABEL _GL_UNUSED
+#else
+# define _GL_UNUSED_LABEL
+#endif
+
 /* The __pure__ attribute was added in gcc 2.96.  */
 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
 # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))