buildsys: regen, add ALL gnulib files this time

Signed-off-by: Fabian Groffen <grobian@gentoo.org>

1 files changed, 756 insertions, 186 deletions

diff --git a/config.h.in b/config.h.in
index 69632ac..8f5dc91 100644
--- a/config.h.in
+++ b/config.h.in
@@ -81,7 +81,11 @@
 #undef FUNC_MKDIR_DOT_BUG
 
 /* Define to 1 if realpath() can malloc memory, always gives an absolute path,
-   and handles trailing slash correctly. */
+   and handles a trailing slash correctly. */
+#undef FUNC_REALPATH_NEARLY_WORKS
+
+/* Define to 1 if realpath() can malloc memory, always gives an absolute path,
+   and handles leading slashes and a trailing slash correctly. */
 #undef FUNC_REALPATH_WORKS
 
 /* Define to 1 if futimesat mishandles a NULL file name. */
@@ -95,9 +99,6 @@
    */
 #undef GETGROUPS_ZERO_BUG
 
-/* 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
@@ -135,6 +136,10 @@
 #undef GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
 
 /* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module reallocarray shall be considered present. */
+#undef GNULIB_REALLOCARRAY
+
+/* 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
 
@@ -146,6 +151,12 @@
    whether the gnulib module strerror shall be considered present. */
 #undef GNULIB_STRERROR
 
+/* Define to 1 when the gnulib module calloc-gnu should be tested. */
+#undef GNULIB_TEST_CALLOC_GNU
+
+/* Define to 1 when the gnulib module calloc-posix should be tested. */
+#undef GNULIB_TEST_CALLOC_POSIX
+
 /* Define to 1 when the gnulib module canonicalize_file_name should be tested.
    */
 #undef GNULIB_TEST_CANONICALIZE_FILE_NAME
@@ -186,12 +197,36 @@
 /* Define to 1 when the gnulib module fdopendir should be tested. */
 #undef GNULIB_TEST_FDOPENDIR
 
+/* Define to 1 when the gnulib module fgetc should be tested. */
+#undef GNULIB_TEST_FGETC
+
+/* Define to 1 when the gnulib module fgets should be tested. */
+#undef GNULIB_TEST_FGETS
+
+/* Define to 1 when the gnulib module fprintf should be tested. */
+#undef GNULIB_TEST_FPRINTF
+
+/* Define to 1 when the gnulib module fputc should be tested. */
+#undef GNULIB_TEST_FPUTC
+
+/* Define to 1 when the gnulib module fputs should be tested. */
+#undef GNULIB_TEST_FPUTS
+
+/* Define to 1 when the gnulib module fread should be tested. */
+#undef GNULIB_TEST_FREAD
+
+/* Define to 1 when the gnulib module free-posix should be tested. */
+#undef GNULIB_TEST_FREE_POSIX
+
 /* Define to 1 when the gnulib module frexp should be tested. */
 #undef GNULIB_TEST_FREXP
 
 /* Define to 1 when the gnulib module frexpl should be tested. */
 #undef GNULIB_TEST_FREXPL
 
+/* Define to 1 when the gnulib module fscanf should be tested. */
+#undef GNULIB_TEST_FSCANF
+
 /* Define to 1 when the gnulib module fstat should be tested. */
 #undef GNULIB_TEST_FSTAT
 
@@ -201,6 +236,15 @@
 /* Define to 1 when the gnulib module futimens should be tested. */
 #undef GNULIB_TEST_FUTIMENS
 
+/* Define to 1 when the gnulib module fwrite should be tested. */
+#undef GNULIB_TEST_FWRITE
+
+/* Define to 1 when the gnulib module getc should be tested. */
+#undef GNULIB_TEST_GETC
+
+/* Define to 1 when the gnulib module getchar should be tested. */
+#undef GNULIB_TEST_GETCHAR
+
 /* Define to 1 when the gnulib module getcwd should be tested. */
 #undef GNULIB_TEST_GETCWD
 
@@ -216,6 +260,9 @@
 /* Define to 1 when the gnulib module getline should be tested. */
 #undef GNULIB_TEST_GETLINE
 
+/* Define to 1 when the gnulib module getopt-posix should be tested. */
+#undef GNULIB_TEST_GETOPT_POSIX
+
 /* Define to 1 when the gnulib module gettimeofday should be tested. */
 #undef GNULIB_TEST_GETTIMEOFDAY
 
@@ -225,6 +272,9 @@
 /* Define to 1 when the gnulib module lstat should be tested. */
 #undef GNULIB_TEST_LSTAT
 
+/* Define to 1 when the gnulib module malloc-gnu should be tested. */
+#undef GNULIB_TEST_MALLOC_GNU
+
 /* Define to 1 when the gnulib module malloc-posix should be tested. */
 #undef GNULIB_TEST_MALLOC_POSIX
 
@@ -237,6 +287,9 @@
 /* Define to 1 when the gnulib module memrchr should be tested. */
 #undef GNULIB_TEST_MEMRCHR
 
+/* Define to 1 when the gnulib module mkdir should be tested. */
+#undef GNULIB_TEST_MKDIR
+
 /* Define to 1 when the gnulib module mkdirat should be tested. */
 #undef GNULIB_TEST_MKDIRAT
 
@@ -249,12 +302,36 @@
 /* Define to 1 when the gnulib module opendir should be tested. */
 #undef GNULIB_TEST_OPENDIR
 
+/* Define to 1 when the gnulib module pipe should be tested. */
+#undef GNULIB_TEST_PIPE
+
+/* Define to 1 when the gnulib module printf should be tested. */
+#undef GNULIB_TEST_PRINTF
+
+/* Define to 1 when the gnulib module putc should be tested. */
+#undef GNULIB_TEST_PUTC
+
+/* Define to 1 when the gnulib module putchar should be tested. */
+#undef GNULIB_TEST_PUTCHAR
+
+/* Define to 1 when the gnulib module puts should be tested. */
+#undef GNULIB_TEST_PUTS
+
+/* Define to 1 when the gnulib module rawmemchr should be tested. */
+#undef GNULIB_TEST_RAWMEMCHR
+
 /* Define to 1 when the gnulib module readlink should be tested. */
 #undef GNULIB_TEST_READLINK
 
 /* Define to 1 when the gnulib module readlinkat should be tested. */
 #undef GNULIB_TEST_READLINKAT
 
+/* Define to 1 when the gnulib module reallocarray should be tested. */
+#undef GNULIB_TEST_REALLOCARRAY
+
+/* Define to 1 when the gnulib module realloc-gnu should be tested. */
+#undef GNULIB_TEST_REALLOC_GNU
+
 /* Define to 1 when the gnulib module realloc-posix should be tested. */
 #undef GNULIB_TEST_REALLOC_POSIX
 
@@ -270,6 +347,9 @@
 /* Define to 1 when the gnulib module rmdir should be tested. */
 #undef GNULIB_TEST_RMDIR
 
+/* Define to 1 when the gnulib module scanf should be tested. */
+#undef GNULIB_TEST_SCANF
+
 /* Define to 1 when the gnulib module signbit should be tested. */
 #undef GNULIB_TEST_SIGNBIT
 
@@ -309,6 +389,20 @@
 /* Define to 1 when the gnulib module vasprintf should be tested. */
 #undef GNULIB_TEST_VASPRINTF
 
+/* Define to 1 when the gnulib module vfprintf should be tested. */
+#undef GNULIB_TEST_VFPRINTF
+
+/* Define to 1 when the gnulib module vprintf should be tested. */
+#undef GNULIB_TEST_VPRINTF
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module xalloc shall be considered present. */
+#undef GNULIB_XALLOC
+
+/* Define to a C preprocessor expression that evaluates to 1 or 0, depending
+   whether the gnulib module xalloc-die shall be considered present. */
+#undef GNULIB_XALLOC_DIE
+
 /* Define to 1 if you have the `access' function. */
 #undef HAVE_ACCESS
 
@@ -331,6 +425,9 @@
 /* Define to 1 if you have the `canonicalize_file_name' function. */
 #undef HAVE_CANONICALIZE_FILE_NAME
 
+/* Define to 1 if you have the `clock_getres' function. */
+#undef HAVE_CLOCK_GETRES
+
 /* Define to 1 if you have the `clock_gettime' function. */
 #undef HAVE_CLOCK_GETTIME
 
@@ -355,6 +452,9 @@
 /* Define to 1 if you have the <crtdefs.h> header file. */
 #undef HAVE_CRTDEFS_H
 
+/* Define to 1 if C supports variable-length arrays. */
+#undef HAVE_C_VARARRAYS
+
 /* Define to 1 if you have the declaration of `alarm', and to 0 if you don't.
    */
 #undef HAVE_DECL_ALARM
@@ -375,14 +475,34 @@
    */
 #undef HAVE_DECL_DIRFD
 
+/* Define to 1 if you have the declaration of `ecvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ECVT
+
+/* Define to 1 if you have the declaration of `execvpe', and to 0 if you
+   don't. */
+#undef HAVE_DECL_EXECVPE
+
 /* Define to 1 if you have the declaration of `fchdir', and to 0 if you don't.
    */
 #undef HAVE_DECL_FCHDIR
 
+/* Define to 1 if you have the declaration of `fcloseall', and to 0 if you
+   don't. */
+#undef HAVE_DECL_FCLOSEALL
+
+/* Define to 1 if you have the declaration of `fcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_FCVT
+
 /* Define to 1 if you have the declaration of `fdopendir', and to 0 if you
    don't. */
 #undef HAVE_DECL_FDOPENDIR
 
+/* Define to 1 if you have the declaration of `gcvt', and to 0 if you don't.
+   */
+#undef HAVE_DECL_GCVT
+
 /* Define to 1 if you have the declaration of `getc_unlocked', and to 0 if you
    don't. */
 #undef HAVE_DECL_GETC_UNLOCKED
@@ -423,6 +543,10 @@
    don't. */
 #undef HAVE_DECL_STRNCASECMP
 
+/* Define to 1 if you have the declaration of `wcsdup', and to 0 if you don't.
+   */
+#undef HAVE_DECL_WCSDUP
+
 /* Define to 1 if you have the declaration of `_snprintf', and to 0 if you
    don't. */
 #undef HAVE_DECL__SNPRINTF
@@ -440,9 +564,6 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
-/* Define to 1 if you have the 'dup2' function. */
-#undef HAVE_DUP2
-
 /* Define to 1 if you have the `eaccess' function. */
 #undef HAVE_EACCESS
 
@@ -470,6 +591,9 @@
 /* Define to 1 if you have the `fmemopen' function. */
 #undef HAVE_FMEMOPEN
 
+/* Define if the 'free' function is guaranteed to preserve errno. */
+#undef HAVE_FREE_POSIX
+
 /* Define if the frexpl function is available in libc. */
 #undef HAVE_FREXPL_IN_LIBC
 
@@ -567,7 +691,7 @@
 /* Define to 1 if you have the `lutimes' function. */
 #undef HAVE_LUTIMES
 
-/* Define if the 'malloc' function is POSIX compliant. */
+/* Define if malloc, realloc, and calloc set errno on allocation failure. */
 #undef HAVE_MALLOC_POSIX
 
 /* Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
@@ -586,6 +710,15 @@
 /* Define to 1 if you have the `memrchr' function. */
 #undef HAVE_MEMRCHR
 
+/* Define to 1 if you have the <minix/config.h> header file. */
+#undef HAVE_MINIX_CONFIG_H
+
+/* Define to 1 if <limits.h> defines the MIN and MAX macros. */
+#undef HAVE_MINMAX_IN_LIMITS_H
+
+/* Define to 1 if <sys/param.h> defines the MIN and MAX macros. */
+#undef HAVE_MINMAX_IN_SYS_PARAM_H
+
 /* Define to 1 if you have the `mkdirat' function. */
 #undef HAVE_MKDIRAT
 
@@ -596,6 +729,9 @@
    concept. */
 #undef HAVE_MSVC_INVALID_PARAMETER_HANDLER
 
+/* Define to 1 if utimensat works, except for the trailing slash handling. */
+#undef HAVE_NEARLY_WORKING_UTIMENSAT
+
 /* Define to 1 if you have the `nl_langinfo' function. */
 #undef HAVE_NL_LANGINFO
 
@@ -614,14 +750,17 @@
 /* Define to 1 if you have the `pipe' function. */
 #undef HAVE_PIPE
 
+/* Define to 1 if you have the `rawmemchr' function. */
+#undef HAVE_RAWMEMCHR
+
 /* Define to 1 if you have the `readlink' function. */
 #undef HAVE_READLINK
 
 /* Define to 1 if you have the `readlinkat' function. */
 #undef HAVE_READLINKAT
 
-/* Define if the 'realloc' function is POSIX compliant. */
-#undef HAVE_REALLOC_POSIX
+/* Define to 1 if you have the `reallocarray' function. */
+#undef HAVE_REALLOCARRAY
 
 /* Define to 1 if you have the `realpath' function. */
 #undef HAVE_REALPATH
@@ -638,6 +777,9 @@
 /* Define to 1 if you have the `scandirat' function. */
 #undef HAVE_SCANDIRAT
 
+/* Define to 1 if you have the <sdkddkver.h> header file. */
+#undef HAVE_SDKDDKVER_H
+
 /* Define this if Linux/Solaris sendfile() is supported */
 #undef HAVE_SENDFILE4_SUPPORT
 
@@ -667,6 +809,10 @@
    buffer had been large enough. */
 #undef HAVE_SNPRINTF_RETVAL_C99
 
+/* Define if the string produced by the snprintf function is always NUL
+   terminated. */
+#undef HAVE_SNPRINTF_TRUNCATION_C99
+
 /* Define if you have ssl */
 #undef HAVE_SSL
 
@@ -692,9 +838,6 @@
 /* Define to 1 if you have the `strcasestr' function. */
 #undef HAVE_STRCASESTR
 
-/* Define to 1 if you have the `strdup' function. */
-#undef HAVE_STRDUP
-
 /* Define if you have `strerror_r'. */
 #undef HAVE_STRERROR_R
 
@@ -764,6 +907,9 @@
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
+/* Define to 1 if you have the `timespec_get' function. */
+#undef HAVE_TIMESPEC_GET
+
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
@@ -834,6 +980,127 @@
 /* Define to 1 if you have the `_set_invalid_parameter_handler' function. */
 #undef HAVE__SET_INVALID_PARAMETER_HANDLER
 
+/* Define to 1 if the compiler supports __builtin_expect,
+   and to 2 if <builtins.h> does.  */
+#undef HAVE___BUILTIN_EXPECT
+#ifndef HAVE___BUILTIN_EXPECT
+# define __builtin_expect(e, c) (e)
+#elif HAVE___BUILTIN_EXPECT == 2
+# include <builtins.h>
+#endif
+    
+
+/* Define to 1 if ctype.h defines __header_inline. */
+#undef HAVE___HEADER_INLINE
+
+/* 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
+   <https://lists.gnu.org/r/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 Oracle Developer Studio 12.6
+   (Sun C 5.15 SunOS_sparc 2017/05/30).
+
+   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 (ISO C 99 section 6.7.4.(3).
+   This bug is known to occur on:
+
+     OS X 10.8 and earlier; see:
+     https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html
+
+     DragonFly; see
+     http://muscles.dragonflybsd.org/bulk/clang-master-potential/20141111_102002/logs/ah-tty-0.3.12.log
+
+     FreeBSD; see:
+     https://lists.gnu.org/r/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 <https://trac.macports.org/ticket/41033>.
+   Assume DragonFly and FreeBSD will be similar.
+
+   GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  It defines a macro
+   __GNUC_STDC_INLINE__ to indicate this situation or a macro
+   __GNUC_GNU_INLINE__ to indicate the opposite situation.
+   GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
+   semantics but warns, unless -fgnu89-inline is used:
+     warning: C99 inline functions are not supported; using GNU89
+     warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
+   It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
+ */
+#if (((defined __APPLE__ && defined __MACH__) \
+      || defined __DragonFly__ || defined __FreeBSD__) \
+     && (defined HAVE___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
+#if ((__GNUC__ \
+      ? 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
+# define _GL_EXTERN_INLINE extern 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 _GL_UNUSED static
+# define _GL_EXTERN_INLINE _GL_UNUSED static
+#endif
+
+/* 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
+#  define _GL_INLINE_HEADER_CONST_PRAGMA \
+     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
+# endif
+# define _GL_INLINE_HEADER_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
+    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
+    _GL_INLINE_HEADER_CONST_PRAGMA
+# define _GL_INLINE_HEADER_END \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_END
+#endif
+
+/* Define to 1 if the compiler supports the keyword '__inline'. */
+#undef HAVE___INLINE
+
 /* Define as the bit index in the word where to find bit 0 of the exponent of
    'long double'. */
 #undef LDBL_EXPBIT0_BIT
@@ -939,9 +1206,6 @@
 /* Define to the version of this package. */
 #undef PACKAGE_VERSION
 
-/* Define if <inttypes.h> exists and defines unusable PRI* macros. */
-#undef PRI_MACROS_BROKEN
-
 /* Define to the type that is the result of default argument promotions of
    type mode_t. */
 #undef PROMOTED_MODE_T
@@ -953,6 +1217,10 @@
 /* Define to 1 if readlink fails to recognize a trailing slash. */
 #undef READLINK_TRAILING_SLASH_BUG
 
+/* Define to 1 if readlink sets errno instead of truncating a too-long link.
+   */
+#undef READLINK_TRUNCATE_BUG
+
 /* Define if rename does not work when the destination file exists, as on
    Cygwin 1.5 or Windows. */
 #undef RENAME_DEST_EXISTS_BUG
@@ -979,6 +1247,10 @@
    slash */
 #undef REPLACE_FUNC_STAT_FILE
 
+/* Define to 1 if utime needs help when passed a file name with a trailing
+   slash */
+#undef REPLACE_FUNC_UTIME_FILE
+
 /* Define to 1 if open() should work around the inability to open a directory.
    */
 #undef REPLACE_OPEN_DIRECTORY
@@ -1040,19 +1312,44 @@
 #ifndef _DARWIN_C_SOURCE
 # undef _DARWIN_C_SOURCE
 #endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
 /* Enable GNU extensions on systems that have them.  */
 #ifndef _GNU_SOURCE
 # undef _GNU_SOURCE
 #endif
-/* Enable NetBSD extensions on NetBSD.  */
+/* Enable X/Open compliant socket functions that do not require linking
+   with -lxnet on HP-UX 11.11.  */
+#ifndef _HPUX_ALT_XOPEN_SOCKET_API
+# undef _HPUX_ALT_XOPEN_SOCKET_API
+#endif
+/* Identify the host operating system as Minix.
+   This macro does not affect the system headers' behavior.
+   A future release of Autoconf may stop defining this macro.  */
+#ifndef _MINIX
+# undef _MINIX
+#endif
+/* Enable general extensions on NetBSD.
+   Enable NetBSD compatibility extensions on Minix.  */
 #ifndef _NETBSD_SOURCE
 # undef _NETBSD_SOURCE
 #endif
-/* Enable OpenBSD extensions on NetBSD.  */
+/* Enable OpenBSD compatibility extensions on NetBSD.
+   Oddly enough, this does nothing on OpenBSD.  */
 #ifndef _OPENBSD_SOURCE
 # undef _OPENBSD_SOURCE
 #endif
-/* Enable threading extensions on Solaris.  */
+/* Define to 1 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_SOURCE
+# undef _POSIX_SOURCE
+#endif
+/* Define to 2 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_1_SOURCE
+# undef _POSIX_1_SOURCE
+#endif
+/* Enable POSIX-compatible threading on Solaris.  */
 #ifndef _POSIX_PTHREAD_SEMANTICS
 # undef _POSIX_PTHREAD_SEMANTICS
 #endif
@@ -1088,21 +1385,11 @@
 #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.  */
+/* Enable X/Open extensions.  Define to 500 only if necessary
+   to make mbstate_t available.  */
 #ifndef _XOPEN_SOURCE
 # undef _XOPEN_SOURCE
 #endif
-/* Enable X/Open compliant socket functions that do not require linking
-   with -lxnet on HP-UX 11.11.  */
-#ifndef _HPUX_ALT_XOPEN_SOCKET_API
-# undef _HPUX_ALT_XOPEN_SOCKET_API
-#endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
-#endif
 
 
 /* Version number of package */
@@ -1131,23 +1418,43 @@
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
 
-/* Define for large files, on AIX-style hosts. */
-#undef _LARGE_FILES
+/* True if the compiler says it groks GNU C version MAJOR.MINOR.  */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define _GL_GNUC_PREREQ(major, minor) \
+    ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
+#else
+# define _GL_GNUC_PREREQ(major, minor) 0
+#endif
+
 
-/* Define to 1 if on MINIX. */
-#undef _MINIX
+/* Define to enable the declarations of ISO C 11 types and functions. */
+#undef _ISOC11_SOURCE
 
-/* Define to 1 to make NetBSD features available. MINIX 3 needs this. */
-#undef _NETBSD_SOURCE
+/* Define for large files, on AIX-style hosts. */
+#undef _LARGE_FILES
 
 /* The _Noreturn keyword of C11.  */
 #ifndef _Noreturn
-# if 201103 <= (defined __cplusplus ? __cplusplus : 0)
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
 #  define _Noreturn [[noreturn]]
-# elif (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
-        || 4 < __GNUC__ + (7 <= __GNUC_MINOR__))
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (_GL_GNUC_PREREQ (4, 7) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
    /* _Noreturn works as-is.  */
-# elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C
+# elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C
 #  define _Noreturn __attribute__ ((__noreturn__))
 # elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
 #  define _Noreturn __declspec (noreturn)
@@ -1157,12 +1464,8 @@
 #endif
 
 
-/* Define to 2 if the system does not provide POSIX.1 features except with
-   this defined. */
-#undef _POSIX_1_SOURCE
-
-/* Define to 1 if you need to in order for 'stat' and other things to work. */
-#undef _POSIX_SOURCE
+/* Number of bits in a timestamp, on hosts where this is settable. */
+#undef _TIME_BITS
 
 /* For standard stat data types on VMS. */
 #undef _USE_STD_STAT
@@ -1171,116 +1474,410 @@
    used. */
 #undef __GETOPT_PREFIX
 
+/* For 64-bit time_t on 32-bit mingw. */
+#undef __MINGW_USE_VC2005_COMPAT
+
 /* 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.
+/* Define to 1 if C does not support variable-length arrays, and if the
+   compiler does not already define this. */
+#undef __STDC_NO_VLA__
+
+/* The _GL_ASYNC_SAFE marker should be attached to functions that are
+   signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
+   invoked from such signal handlers.  Such functions have some restrictions:
+     * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
+       or should be listed as async-signal-safe in POSIX
+       <https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
+       section 2.4.3.  Note that malloc(), sprintf(), and fwrite(), in
+       particular, are NOT async-signal-safe.
+     * All memory locations (variables and struct fields) that these functions
+       access must be marked 'volatile'.  This holds for both read and write
+       accesses.  Otherwise the compiler might optimize away stores to and
+       reads from such locations that occur in the program, depending on its
+       data flow analysis.  For example, when the program contains a loop
+       that is intended to inspect a variable set from within a signal handler
+           while (!signal_occurred)
+             ;
+       the compiler is allowed to transform this into an endless loop if the
+       variable 'signal_occurred' is not declared 'volatile'.
+   Additionally, recall that:
+     * A signal handler should not modify errno (except if it is a handler
+       for a fatal signal and ends by raising the same signal again, thus
+       provoking the termination of the process).  If it invokes a function
+       that may clobber errno, it needs to save and restore the value of
+       errno.  */
+#define _GL_ASYNC_SAFE
+
+
+/* Attributes.  */
+#if (defined __has_attribute \
+     && (!defined __clang_minor__ \
+         || 3 < __clang_major__ + (5 <= __clang_minor__)))
+# define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
+#else
+# define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
+# define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
+# define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
+# define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_diagnose_if 0
+# define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
+# define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
+# define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
+# define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
+# ifdef _ICC
+#  define _GL_ATTR_may_alias 0
+# else
+#  define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
+# endif
+# define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
+# define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
+# define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
+# define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
+# define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
+#endif
 
-   Suppress extern inline with HP-UX cc, as it appears to be broken; see
-   <https://lists.gnu.org/r/bug-texinfo/2013-02/msg00030.html>.
+#ifdef __has_c_attribute
+# define _GL_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__)
+#else
+# define _GL_HAS_C_ATTRIBUTE(attr) 0
+#endif
 
-   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 (ISO C 99 section 6.7.4.(3).
-   This bug is known to occur on:
+/* _GL_ATTRIBUTE_ALLOC_SIZE ((N)) declares that the Nth argument of the function
+   is the size of the returned memory block.
+   _GL_ATTRIBUTE_ALLOC_SIZE ((M, N)) declares that the Mth argument multiplied
+   by the Nth argument of the function is the size of the returned memory block.
+ */
+/* Applies to: function, pointer to function, function types.  */
+#if _GL_HAS_ATTRIBUTE (alloc_size)
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+#else
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#endif
 
-     OS X 10.8 and earlier; see:
-     https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html
+/* _GL_ATTRIBUTE_ALWAYS_INLINE tells that the compiler should always inline the
+   function and report an error if it cannot do so.  */
+/* Applies to: function.  */
+#if _GL_HAS_ATTRIBUTE (always_inline)
+# define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#else
+# define _GL_ATTRIBUTE_ALWAYS_INLINE
+#endif
 
-     DragonFly; see
-     http://muscles.dragonflybsd.org/bulk/bleeding-edge-potential/latest-per-pkg/ah-tty-0.3.12.log
+/* _GL_ATTRIBUTE_ARTIFICIAL declares that the function is not important to show
+    in stack traces when debugging.  The compiler should omit the function from
+    stack traces.  */
+/* Applies to: function.  */
+#if _GL_HAS_ATTRIBUTE (artificial)
+# define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+#else
+# define _GL_ATTRIBUTE_ARTIFICIAL
+#endif
 
-     FreeBSD; see:
-     https://lists.gnu.org/r/bug-gnulib/2014-07/msg00104.html
+/* _GL_ATTRIBUTE_COLD declares that the function is rarely executed.  */
+/* Applies to: functions.  */
+/* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
+   <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
+   Also, Oracle Studio 12.6 requires 'cold' not '__cold__'.  */
+#if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+# ifndef __SUNPRO_C
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+# else
+#  define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+# endif
+#else
+# define _GL_ATTRIBUTE_COLD
+#endif
 
-   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
-   for clang but remains for g++; see <https://trac.macports.org/ticket/41033>.
-   Assume DragonFly and FreeBSD will be similar.
+/* _GL_ATTRIBUTE_CONST declares that it is OK for a compiler to omit duplicate
+   calls to the function with the same arguments.
+   This attribute is safe for a function that neither depends on nor affects
+   observable state, and always returns exactly once - e.g., does not loop
+   forever, and does not call longjmp.
+   (This attribute is stricter than _GL_ATTRIBUTE_PURE.)  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (const)
+# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
+#else
+# define _GL_ATTRIBUTE_CONST
+#endif
 
-   GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
-   inline semantics, unless -fgnu89-inline is used.  It defines a macro
-   __GNUC_STDC_INLINE__ to indicate this situation or a macro
-   __GNUC_GNU_INLINE__ to indicate the opposite situation.
-   GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
-   semantics but warns, unless -fgnu89-inline is used:
-     warning: C99 inline functions are not supported; using GNU89
-     warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
-   It defines a macro __GNUC_GNU_INLINE__ to indicate this situation.
+/* _GL_ATTRIBUTE_DEALLOC (F, I) declares that the function returns pointers
+   that can be freed by passing them as the Ith argument to the
+   function F.
+   _GL_ATTRIBUTE_DEALLOC_FREE declares that the function returns pointers that
+   can be freed via 'free'; it can be used only after declaring 'free'.  */
+/* Applies to: functions.  Cannot be used on inline functions.  */
+#if _GL_GNUC_PREREQ (11, 0)
+# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+#else
+# define _GL_ATTRIBUTE_DEALLOC(f, i)
+#endif
+/* If gnulib's <string.h> or <wchar.h> has already defined this macro, continue
+   to use this earlier definition, since <stdlib.h> may not have been included
+   yet.  */
+#ifndef _GL_ATTRIBUTE_DEALLOC_FREE
+# define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+#endif
+
+/* _GL_ATTRIBUTE_DEPRECATED: Declares that an entity is deprecated.
+   The compiler may warn if the entity is used.  */
+/* Applies to:
+     - function, variable,
+     - struct, union, struct/union member,
+     - enumeration, enumeration item,
+     - typedef,
+   in C++ also: namespace, class, template specialization.  */
+#if _GL_HAS_C_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#elif _GL_HAS_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#else
+# define _GL_ATTRIBUTE_DEPRECATED
+#endif
+
+/* _GL_ATTRIBUTE_ERROR(msg) requests an error if a function is called and
+   the function call is not optimized away.
+   _GL_ATTRIBUTE_WARNING(msg) requests a warning if a function is called and
+   the function call is not optimized away.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (error)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+#elif _GL_HAS_ATTRIBUTE (diagnose_if)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error")))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#else
+# define _GL_ATTRIBUTE_ERROR(msg)
+# define _GL_ATTRIBUTE_WARNING(msg)
+#endif
+
+/* _GL_ATTRIBUTE_EXTERNALLY_VISIBLE declares that the entity should remain
+   visible to debuggers etc., even with '-fwhole-program'.  */
+/* Applies to: functions, variables.  */
+#if _GL_HAS_ATTRIBUTE (externally_visible)
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+#else
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#endif
+
+/* _GL_ATTRIBUTE_FALLTHROUGH declares that it is not a programming mistake if
+   the control flow falls through to the immediately following 'case' or
+   'default' label.  The compiler should not warn in this case.  */
+/* Applies to: Empty statement (;), inside a 'switch' statement.  */
+/* Always expands to something.  */
+#if _GL_HAS_C_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#elif _GL_HAS_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+#else
+# define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+#endif
+
+/* _GL_ATTRIBUTE_FORMAT ((ARCHETYPE, STRING-INDEX, FIRST-TO-CHECK))
+   declares that the STRING-INDEXth function argument is a format string of
+   style ARCHETYPE, which is one of:
+     printf, gnu_printf
+     scanf, gnu_scanf,
+     strftime, gnu_strftime,
+     strfmon,
+   or the same thing prefixed and suffixed with '__'.
+   If FIRST-TO-CHECK is not 0, arguments starting at FIRST-TO_CHECK
+   are suitable for the format string.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (format)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec)
+#endif
+
+/* _GL_ATTRIBUTE_LEAF declares that if the function is called from some other
+   compilation unit, it executes code from that unit only by return or by
+   exception handling.  This declaration lets the compiler optimize that unit
+   more aggressively.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (leaf)
+# define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+#else
+# define _GL_ATTRIBUTE_LEAF
+#endif
+
+/* _GL_ATTRIBUTE_MALLOC declares that the function returns a pointer to freshly
+   allocated memory.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (malloc)
+# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+#else
+# define _GL_ATTRIBUTE_MALLOC
+#endif
+
+/* _GL_ATTRIBUTE_MAY_ALIAS declares that pointers to the type may point to the
+   same storage as pointers to other types.  Thus this declaration disables
+   strict aliasing optimization.  */
+/* Applies to: types.  */
+/* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK.  */
+#if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
+# define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+#else
+# define _GL_ATTRIBUTE_MAY_ALIAS
+#endif
+
+/* _GL_ATTRIBUTE_MAYBE_UNUSED declares that it is not a programming mistake if
+   the entity is not used.  The compiler should not warn if the entity is not
+   used.  */
+/* Applies to:
+     - function, variable,
+     - struct, union, struct/union member,
+     - enumeration, enumeration item,
+     - typedef,
+   in C++ also: class.  */
+/* In C++ and C2x, this is spelled [[__maybe_unused__]].
+   GCC's syntax is __attribute__ ((__unused__)).
+   clang supports both syntaxes.  */
+#if _GL_HAS_C_ATTRIBUTE (maybe_unused)
+# define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#else
+# define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+#endif
+/* Alternative spelling of this macro, for convenience.  */
+#define _GL_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED
+/* Earlier spellings of this macro.  */
+#define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
+
+/* _GL_ATTRIBUTE_NODISCARD declares that the caller of the function should not
+   discard the return value.  The compiler may warn if the caller does not use
+   the return value, unless the caller uses something like ignore_value.  */
+/* Applies to: function, enumeration, class.  */
+#if _GL_HAS_C_ATTRIBUTE (nodiscard)
+# define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#elif _GL_HAS_ATTRIBUTE (warn_unused_result)
+# define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+#else
+# define _GL_ATTRIBUTE_NODISCARD
+#endif
+
+/* _GL_ATTRIBUTE_NOINLINE tells that the compiler should not inline the
+   function.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (noinline)
+# define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+#else
+# define _GL_ATTRIBUTE_NOINLINE
+#endif
+
+/* _GL_ATTRIBUTE_NONNULL ((N1, N2,...)) declares that the arguments N1, N2,...
+   must not be NULL.
+   _GL_ATTRIBUTE_NONNULL () declares that all pointer arguments must not be
+   null.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (nonnull)
+# define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+#else
+# define _GL_ATTRIBUTE_NONNULL(args)
+#endif
+
+/* _GL_ATTRIBUTE_NONSTRING declares that the contents of a character array is
+   not meant to be NUL-terminated.  */
+/* Applies to: struct/union members and variables that are arrays of element
+   type '[[un]signed] char'.  */
+#if _GL_HAS_ATTRIBUTE (nonstring)
+# define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+#else
+# define _GL_ATTRIBUTE_NONSTRING
+#endif
+
+/* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead.  */
+
+/* _GL_ATTRIBUTE_NOTHROW declares that the function does not throw exceptions.
  */
-#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
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+# define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+#else
+# define _GL_ATTRIBUTE_NOTHROW
 #endif
-#if ((__GNUC__ \
-      ? 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
-# define _GL_EXTERN_INLINE extern 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
+
+/* _GL_ATTRIBUTE_PACKED declares:
+   For struct members: The member has the smallest possible alignment.
+   For struct, union, class: All members have the smallest possible alignment,
+   minimizing the memory required.  */
+/* Applies to: struct members, struct, union,
+   in C++ also: class.  */
+#if _GL_HAS_ATTRIBUTE (packed)
+# define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
 #else
-# define _GL_INLINE static _GL_UNUSED
-# define _GL_EXTERN_INLINE static _GL_UNUSED
+# define _GL_ATTRIBUTE_PACKED
 #endif
 
-/* 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
-#  define _GL_INLINE_HEADER_CONST_PRAGMA \
-     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
-# endif
-# define _GL_INLINE_HEADER_BEGIN \
-    _Pragma ("GCC diagnostic push") \
-    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
-    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
-    _GL_INLINE_HEADER_CONST_PRAGMA
-# define _GL_INLINE_HEADER_END \
-    _Pragma ("GCC diagnostic pop")
+/* _GL_ATTRIBUTE_PURE declares that It is OK for a compiler to omit duplicate
+   calls to the function with the same arguments if observable state is not
+   changed between calls.
+   This attribute is safe for a function that does not affect
+   observable state, and always returns exactly once.
+   (This attribute is looser than _GL_ATTRIBUTE_CONST.)  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (pure)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
 #else
-# define _GL_INLINE_HEADER_BEGIN
-# define _GL_INLINE_HEADER_END
+# define _GL_ATTRIBUTE_PURE
+#endif
+
+/* _GL_ATTRIBUTE_RETURNS_NONNULL declares that the function's return value is
+   a non-NULL pointer.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (returns_nonnull)
+# define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+#else
+# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#endif
+
+/* _GL_ATTRIBUTE_SENTINEL(pos) declares that the variadic function expects a
+   trailing NULL argument.
+   _GL_ATTRIBUTE_SENTINEL () - The last argument is NULL (requires C99).
+   _GL_ATTRIBUTE_SENTINEL ((N)) - The (N+1)st argument from the end is NULL.  */
+/* Applies to: functions.  */
+#if _GL_HAS_ATTRIBUTE (sentinel)
+# define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+#else
+# define _GL_ATTRIBUTE_SENTINEL(pos)
+#endif
+
+/* A helper macro.  Don't use it directly.  */
+#if _GL_HAS_ATTRIBUTE (unused)
+# define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#else
+# define _GL_ATTRIBUTE_UNUSED
+#endif
+
+
+/* _GL_UNUSED_LABEL; declares that it is not a programming mistake if the
+   immediately preceding label is not used.  The compiler should not warn
+   if the label is not used.  */
+/* Applies to: label (both in C and C++).  */
+/* Note that g++ < 4.5 does not support the '__attribute__ ((__unused__)) ;'
+   syntax.  But clang does.  */
+#if !(defined __cplusplus && !_GL_GNUC_PREREQ (4, 5)) || defined __clang__
+# define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+#else
+# define _GL_UNUSED_LABEL
 #endif
 
+
 /* Define to `int' if <sys/types.h> doesn't define. */
 #undef gid_t
 
@@ -1297,6 +1894,22 @@
 # define __GNUC_STDC_INLINE__ 1
 #endif
 
+/* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where
+   n1 and n2 are expressions without side effects, that evaluate to real
+   numbers (excluding NaN).
+   It returns
+     1  if n1 > n2
+     0  if n1 == n2
+     -1 if n1 < n2
+   The naïve code   (n1 > n2 ? 1 : n1 < n2 ? -1 : 0)  produces a conditional
+   jump with nearly all GCC versions up to GCC 10.
+   This variant     (n1 < n2 ? -1 : n1 > n2)  produces a conditional with many
+   GCC versions up to GCC 9.
+   The better code  (n1 > n2) - (n1 < n2)  from Hacker's Delight § 2-9
+   avoids conditional jumps in all GCC versions >= 3.4.  */
+#define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
+
+
 /* Define to `int' if <sys/types.h> does not define. */
 #undef mode_t
 
@@ -1312,14 +1925,15 @@
 
 /* Define to the equivalent of the C99 'restrict' keyword, or to
    nothing if this is not supported.  Do not define if restrict is
-   supported directly.  */
+   supported only directly.  */
 #undef restrict
-/* Work around a bug in Sun C++: it does not support _Restrict or
-   __restrict__, even though the corresponding Sun C compiler ends up with
-   "#define restrict _Restrict" or "#define restrict __restrict__" in the
-   previous line.  Perhaps some future version of Sun C++ will work with
-   restrict; if so, hopefully it defines __RESTRICT like Sun C does.  */
-#if defined __SUNPRO_CC && !defined __RESTRICT
+/* Work around a bug in older versions of Sun C++, which did not
+   #define __restrict__ or support _Restrict or __restrict__
+   even though the corresponding Sun C compiler ended up with
+   "#define restrict _Restrict" or "#define restrict __restrict__"
+   in the previous line.  This workaround can be removed once
+   we assume Oracle Developer Studio 12.5 (2016) or later.  */
+#if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
 # define _Restrict
 # define __restrict__
 #endif
@@ -1332,47 +1946,3 @@
 
 /* Define to `int' if <sys/types.h> doesn't define. */
 #undef uid_t
-
-/* Define as a marker that can be attached to declarations that might not
-    be used.  This helps to reduce warnings, such as from
-    GCC -Wunused-parameter.  */
-#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
-# define _GL_UNUSED __attribute__ ((__unused__))
-#else
-# define _GL_UNUSED
-#endif
-/* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
-   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__))
-#else
-# define _GL_ATTRIBUTE_PURE /* empty */
-#endif
-
-/* The __const__ attribute was added in gcc 2.95.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
-# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
-#else
-# define _GL_ATTRIBUTE_CONST /* empty */
-#endif
-
-/* The __malloc__ attribute was added in gcc 3.  */
-#if 3 <= __GNUC__
-# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
-#else
-# define _GL_ATTRIBUTE_MALLOC /* empty */
-#endif
-