Update gnulib to current upstream master

I tried building gdb with G++ 4.7 and CXX="g++ -std=gnu+11", and that
tripped on a build error:

  In file included from build-gnulib/import/stdio.h:53:0,
		   from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/common/common-defs.h:31,
		   from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/defs.h:28,
		   from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/armobsd-tdep.c:20:
  build-gnulib/import/stddef.h:104:3: error: conflicting declaration ‘typedef union max_align_t max_align_t’
  In file included from build-gnulib/import/stddef.h:55:0,
		   from build-gnulib/import/stdio.h:53,
		   from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/common/common-defs.h:31,
		   from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/defs.h:28,
		   from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/armobsd-tdep.c:20:
  /opt/gcc-4.7/lib/gcc/x86_64-unknown-linux-gnu/4.7.4/include/stddef.h:426:3: error: ‘max_align_t’ has a previous declaration as ‘typedef struct max_align_t max_align_t’

Updating gnulib to current master fixes it, since it brings in this
fix:

 http://lists.gnu.org/archive/html/bug-gnulib/2016-04/msg00000.html

Our last update was in August 2015.  This doesn't bring in much added
baggage, it's mostly bug fixes.  It pulled in the "limits-h" module as
automatic dependency, and given that looks potentially useful I added
it to the set of modules we require.

Tested on x86_64 Fedora 23, with g++ 4.7 and g++ 5.3, native and gdbserver.

gdb/ChangeLog:
2016-10-18  Pedro Alves  <palves@redhat.com>

	* gnulib/update-gnulib.sh (GNULIB_COMMIT_SHA1): Set to
	2692e23a48e21f6daa029e8af9f1a143b7532f47.
	* gnulib/configure, gnulib/config.in, gnulib/aclocal.m4:
	Regenerate.
	* gnulib/import/Makefile: Update.
	* gnulib/import/alloca: Update.
	* gnulib/import/basename-lgpl: Update.
	* gnulib/import/canonicalize-lgpl: Update.
	* gnulib/import/config: Update.
	* gnulib/import/dirent: Update.
	* gnulib/import/dirfd: Update.
	* gnulib/import/dirname-lgpl: Update.
	* gnulib/import/dirname.h: Update.
	* gnulib/import/dosname.h: Update.
	* gnulib/import/errno: 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/flexmember.h: Update.
	* gnulib/import/float+.h: Update.
	* gnulib/import/float: Update.
	* gnulib/import/float: Update.
	* gnulib/import/fnmatch: Update.
	* gnulib/import/fnmatch: Update.
	* gnulib/import/fnmatch_loop: Update.
	* gnulib/import/fpucw.h: Update.
	* gnulib/import/frexp: Update.
	* gnulib/import/frexpl: Update.
	* gnulib/import/gettimeofday: Update.
	* gnulib/import/hard-locale: Update.
	* gnulib/import/hard-locale.h: Update.
	* gnulib/import/inttypes: Update.
	* gnulib/import/isnan: Update.
	* gnulib/import/isnand-nolibm.h: Update.
	* gnulib/import/isnand: Update.
	* gnulib/import/isnanl-nolibm.h: Update.
	* gnulib/import/isnanl: Update.
	* gnulib/import/itold: Update.
	* gnulib/import/limits: Update.
	* gnulib/import/localcharset: Update.
	* gnulib/import/localcharset.h: Update.
	* gnulib/import/lstat: Update.
	* gnulib/import/m4/00gnulib: Update.
	* gnulib/import/m4/absolute-header: Update.
	* gnulib/import/m4/alloca: Update.
	* gnulib/import/m4/canonicalize: Update.
	* gnulib/import/m4/codeset: Update.
	* gnulib/import/m4/configmake: Update.
	* gnulib/import/m4/dirent_h: Update.
	* gnulib/import/m4/dirfd: Update.
	* gnulib/import/m4/dirname: Update.
	* gnulib/import/m4/double-slash-root: Update.
	* gnulib/import/m4/eealloc: Update.
	* gnulib/import/m4/errno_h: Update.
	* gnulib/import/m4/exponentd: Update.
	* gnulib/import/m4/exponentl: Update.
	* gnulib/import/m4/extensions: Update.
	* gnulib/import/m4/extern-inline: Update.
	* gnulib/import/m4/fcntl-o: Update.
	* gnulib/import/m4/flexmember: Update.
	* gnulib/import/m4/float_h: Update.
	* gnulib/import/m4/fnmatch: Update.
	* gnulib/import/m4/fpieee: Update.
	* gnulib/import/m4/frexp: Update.
	* gnulib/import/m4/frexpl: Update.
	* gnulib/import/m4/gettimeofday: Update.
	* gnulib/import/m4/glibc21: Update.
	* gnulib/import/m4/gnulib-cache: Update.
	* gnulib/import/m4/gnulib-common: Update.
	* gnulib/import/m4/gnulib-comp: Update.
	* gnulib/import/m4/gnulib-tool: Update.
	* gnulib/import/m4/hard-locale: Update.
	* gnulib/import/m4/include_next: Update.
	* gnulib/import/m4/inttypes-pri: Update.
	* gnulib/import/m4/inttypes: Update.
	* gnulib/import/m4/isnand: Update.
	* gnulib/import/m4/isnanl: Update.
	* gnulib/import/m4/largefile: Update.
	* gnulib/import/m4/limits-h: Update.
	* gnulib/import/m4/localcharset: Update.
	* gnulib/import/m4/locale-fr: Update.
	* gnulib/import/m4/locale-ja: Update.
	* gnulib/import/m4/locale-zh: Update.
	* gnulib/import/m4/longlong: Update.
	* gnulib/import/m4/lstat: Update.
	* gnulib/import/m4/malloc: Update.
	* gnulib/import/m4/malloca: Update.
	* gnulib/import/m4/math_h: Update.
	* gnulib/import/m4/mbrtowc: Update.
	* gnulib/import/m4/mbsinit: Update.
	* gnulib/import/m4/mbsrtowcs: Update.
	* gnulib/import/m4/mbstate_t: Update.
	* gnulib/import/m4/memchr: Update.
	* gnulib/import/m4/memmem: Update.
	* gnulib/import/m4/mmap-anon: Update.
	* gnulib/import/m4/multiarch: Update.
	* gnulib/import/m4/nocrash: Update.
	* gnulib/import/m4/off_t: Update.
	* gnulib/import/m4/pathmax: Update.
	* gnulib/import/m4/rawmemchr: Update.
	* gnulib/import/m4/readlink: Update.
	* gnulib/import/m4/rename: Update.
	* gnulib/import/m4/rmdir: Update.
	* gnulib/import/m4/signal_h: Update.
	* gnulib/import/m4/ssize_t: Update.
	* gnulib/import/m4/stat: Update.
	* gnulib/import/m4/stdbool: Update.
	* gnulib/import/m4/stddef_h: Update.
	* gnulib/import/m4/stdint: Update.
	* gnulib/import/m4/stdio_h: Update.
	* gnulib/import/m4/stdlib_h: Update.
	* gnulib/import/m4/strchrnul: Update.
	* gnulib/import/m4/string_h: Update.
	* gnulib/import/m4/strstr: Update.
	* gnulib/import/m4/strtok_r: Update.
	* gnulib/import/m4/sys_socket_h: Update.
	* gnulib/import/m4/sys_stat_h: Update.
	* gnulib/import/m4/sys_time_h: Update.
	* gnulib/import/m4/sys_types_h: Update.
	* gnulib/import/m4/time_h: Update.
	* gnulib/import/m4/unistd_h: Update.
	* gnulib/import/m4/warn-on-use: Update.
	* gnulib/import/m4/wchar_h: Update.
	* gnulib/import/m4/wchar_t: Update.
	* gnulib/import/m4/wctype_h: Update.
	* gnulib/import/m4/wint_t: Update.
	* gnulib/import/malloc: Update.
	* gnulib/import/malloca: Update.
	* gnulib/import/malloca.h: Update.
	* gnulib/import/math: Update.
	* gnulib/import/math: Update.
	* gnulib/import/mbrtowc: Update.
	* gnulib/import/mbsinit: Update.
	* gnulib/import/mbsrtowcs-impl.h: Update.
	* gnulib/import/mbsrtowcs-state: Update.
	* gnulib/import/mbsrtowcs: Update.
	* gnulib/import/memchr: Update.
	* gnulib/import/memmem: Update.
	* gnulib/import/pathmax.h: Update.
	* gnulib/import/rawmemchr: Update.
	* gnulib/import/readlink: Update.
	* gnulib/import/ref-add.sin: Update.
	* gnulib/import/ref-del.sin: Update.
	* gnulib/import/rename: Update.
	* gnulib/import/rmdir: Update.
	* gnulib/import/same-inode.h: Update.
	* gnulib/import/signal: Update.
	* gnulib/import/stat: Update.
	* gnulib/import/stdbool: Update.
	* gnulib/import/stddef: Update.
	* gnulib/import/stdint: Update.
	* gnulib/import/stdio: Update.
	* gnulib/import/stdlib: Update.
	* gnulib/import/str-two-way.h: Update.
	* gnulib/import/strchrnul: Update.
	* gnulib/import/streq.h: Update.
	* gnulib/import/string: Update.
	* gnulib/import/stripslash: Update.
	* gnulib/import/strnlen1: Update.
	* gnulib/import/strnlen1.h: Update.
	* gnulib/import/strstr: Update.
	* gnulib/import/strtok_r: Update.
	* gnulib/import/sys_stat: Update.
	* gnulib/import/sys_time: Update.
	* gnulib/import/sys_types: Update.
	* gnulib/import/time: Update.
	* gnulib/import/unistd: Update.
	* gnulib/import/unistd: Update.
	* gnulib/import/verify.h: Update.
	* gnulib/import/wchar: Update.
	* gnulib/import/wctype: Update.
	* gnulib/import/flexmember.h: New file.
	* gnulib/import/hard-locale.c: New file.
	* gnulib/import/hard-locale.h: New file.
	* gnulib/import/limits.in.h: New file.
	* gnulib/import/m4/flexmember.m4: New file.
	* gnulib/import/m4/hard-locale.m4: New file.
	* gnulib/import/m4/limits-h.m4: New file.

1 files changed, 60 insertions, 5 deletions

diff --git a/gdb/gnulib/config.in b/gdb/gnulib/config.in
index 13713940314..edc12fe9e7d 100644
--- a/gdb/gnulib/config.in
+++ b/gdb/gnulib/config.in
@@ -26,6 +26,9 @@
 /* Define to 1 if using 'alloca.c'. */
 #undef C_ALLOCA
 
+/* Define to 1 if the C locale may have encoding errors. */
+#undef C_LOCALE_MAYBE_EILSEQ
+
 /* Define as the bit index in the word where to find bit 0 of the exponent of
    'double'. */
 #undef DBL_EXPBIT0_BIT
@@ -46,6 +49,15 @@
 /* Define to 1 if // is a file system root distinct from /. */
 #undef DOUBLE_SLASH_IS_DISTINCT_ROOT
 
+/* Define to nothing if C supports flexible array members, and to 1 if it does
+   not. That way, with a declaration like 'struct s { int n; double
+   d[FLEXIBLE_ARRAY_MEMBER]; };', the struct hack can be used with pre-C99
+   compilers. When computing the size of such an object, don't use 'sizeof
+   (struct s)' as it overestimates the size. Use 'offsetof (struct s, d)'
+   instead. Don't use 'offsetof (struct s, d[0])', as this doesn't work with
+   MSVC and with C++ compilers. */
+#undef FLEXIBLE_ARRAY_MEMBER
+
 /* Define to 1 if realpath() can malloc memory, always gives an absolute path,
    and handles trailing slash correctly. */
 #undef FUNC_REALPATH_WORKS
@@ -239,6 +251,9 @@
 /* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
 #undef HAVE_LANGINFO_CODESET
 
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
 /* Define to 1 if you have the `link' function. */
 #undef HAVE_LINK
 
@@ -1246,6 +1261,12 @@
 /* Define if the mbrtowc function returns a wrong return value. */
 #undef MBRTOWC_RETVAL_BUG
 
+/* Use GNU style printf and scanf.  */
+#ifndef __USE_MINGW_ANSI_STDIO
+# undef __USE_MINGW_ANSI_STDIO
+#endif
+
+
 /* Define to the address where bug reports for this package should be sent. */
 #undef PACKAGE_BUGREPORT
 
@@ -1290,6 +1311,9 @@
    such as on Solaris 9 or cygwin 1.5. */
 #undef RENAME_TRAILING_SLASH_SOURCE_BUG
 
+/* Define to 1 if gnulib's dirfd() replacement is used. */
+#undef REPLACE_DIRFD
+
 /* Define to 1 if stat needs help when passed a directory name with a trailing
    slash */
 #undef REPLACE_FUNC_STAT_DIR
@@ -1324,7 +1348,7 @@
 #ifndef _ALL_SOURCE
 # undef _ALL_SOURCE
 #endif
-/* Enable general extensions on OS X.  */
+/* Enable general extensions on macOS.  */
 #ifndef _DARWIN_C_SOURCE
 # undef _DARWIN_C_SOURCE
 #endif
@@ -1332,14 +1356,38 @@
 #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 specified by ISO/IEC TS 18661-5:2014.  */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
+/* Enable extensions specified by ISO/IEC 24747:2009.  */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
 /* Enable extensions on HP NonStop.  */
 #ifndef _TANDEM_SOURCE
 # undef _TANDEM_SOURCE
@@ -1416,6 +1464,12 @@
 /* Define to 1 if you need to in order for 'stat' and other things to work. */
 #undef _POSIX_SOURCE
 
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_CONSTANT_MACROS
+
+/* Define to 1 if the system <stdint.h> predates C++11. */
+#undef __STDC_LIMIT_MACROS
+
 /* 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
@@ -1462,6 +1516,7 @@
       ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
       : (199901L <= __STDC_VERSION__ \
          && !defined __HP_cc \
+         && !defined __PGI \
          && !(defined __SUNPRO_C && __STDC__))) \
      && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
 # define _GL_INLINE inline