Update from gnulib

* admin/merge-gnulib (avoided_flags):
* cross/lib/cdefs.h (__bos):
(__glibc_unsigned_or_positive):
(__glibc_unsafe_len):
(__glibc_fortify):
(__glibc_fortify_n):
* cross/lib/isnan.c:
* cross/lib/libc-config.h:
* cross/lib/openat-proc.c (openat_proc_name):
* cross/lib/vasnprintf.c (VASNPRINTF):
* cross/lib/verify.h (_Static_assert):
(_GL_SA3):
* lib/gnulib.mk.in (HAVE_GRANTPT):
(HAVE_SPAWN_H):
(NEXT_AS_FIRST_DIRECTIVE_LIMITS_H):
(NEXT_LIMITS_H):
(REPLACE_GETSUBOPT):
(REPLACE_ILOGB):
(SYSTEM_TYPE):
(BUILT_SOURCES):
* lib/isnan.c:
* lib/vasnprintf.c (VASNPRINTF):
* lib/verify.h (_GL_SA3):
* m4/gnulib-common.m4 (gl_COMMON_BODY):
* m4/gnulib-comp.m4 (gl_INIT): Update from gnulib.

6 files changed, 92 insertions, 45 deletions

diff --git a/cross/lib/cdefs.h b/cross/lib/cdefs.h
index 09a3d19b23b..412f036ce35 100644
--- a/cross/lib/cdefs.h
+++ b/cross/lib/cdefs.h
@@ -140,32 +140,37 @@
 #endif
 
 
+/* Gnulib avoids these definitions, as they don't work on non-glibc platforms.
+   In particular, __bos and __bos0 are defined differently in the Android libc.
+ */
+#ifndef __GNULIB_CDEFS
+
 /* Fortify support.  */
-#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
-#define __bos0(ptr) __builtin_object_size (ptr, 0)
+# define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
+# define __bos0(ptr) __builtin_object_size (ptr, 0)
 
 /* Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available.  */
-#if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0)		      \
-				 || __GNUC_PREREQ (12, 0))
-# define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0)
-# define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1)
-#else
-# define __glibc_objsize0(__o) __bos0 (__o)
-# define __glibc_objsize(__o) __bos (__o)
-#endif
+# if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0)		      \
+				  || __GNUC_PREREQ (12, 0))
+#  define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0)
+#  define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1)
+# else
+#  define __glibc_objsize0(__o) __bos0 (__o)
+#  define __glibc_objsize(__o) __bos (__o)
+# endif
 
 /* Compile time conditions to choose between the regular, _chk and _chk_warn
    variants.  These conditions should get evaluated to constant and optimized
    away.  */
 
-#define __glibc_safe_len_cond(__l, __s, __osz) ((__l) <= (__osz) / (__s))
-#define __glibc_unsigned_or_positive(__l) \
+# define __glibc_safe_len_cond(__l, __s, __osz) ((__l) <= (__osz) / (__s))
+# define __glibc_unsigned_or_positive(__l) \
   ((__typeof (__l)) 0 < (__typeof (__l)) -1				      \
    || (__builtin_constant_p (__l) && (__l) > 0))
 
 /* Length is known to be safe at compile time if the __L * __S <= __OBJSZ
    condition can be folded to a constant and if it is true, or unknown (-1) */
-#define __glibc_safe_or_unknown_len(__l, __s, __osz) \
+# define __glibc_safe_or_unknown_len(__l, __s, __osz) \
   ((__osz) == (__SIZE_TYPE__) -1					      \
    || (__glibc_unsigned_or_positive (__l)				      \
        && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), \
@@ -175,7 +180,7 @@
 /* Conversely, we know at compile time that the length is unsafe if the
    __L * __S <= __OBJSZ condition can be folded to a constant and if it is
    false.  */
-#define __glibc_unsafe_len(__l, __s, __osz) \
+# define __glibc_unsafe_len(__l, __s, __osz) \
   (__glibc_unsigned_or_positive (__l)					      \
    && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l),     \
 						   __s, __osz))		      \
@@ -184,7 +189,7 @@
 /* Fortify function f.  __f_alias, __f_chk and __f_chk_warn must be
    declared.  */
 
-#define __glibc_fortify(f, __l, __s, __osz, ...) \
+# define __glibc_fortify(f, __l, __s, __osz, ...) \
   (__glibc_safe_or_unknown_len (__l, __s, __osz)			      \
    ? __ ## f ## _alias (__VA_ARGS__)					      \
    : (__glibc_unsafe_len (__l, __s, __osz)				      \
@@ -194,13 +199,16 @@
 /* Fortify function f, where object size argument passed to f is the number of
    elements and not total size.  */
 
-#define __glibc_fortify_n(f, __l, __s, __osz, ...) \
+# define __glibc_fortify_n(f, __l, __s, __osz, ...) \
   (__glibc_safe_or_unknown_len (__l, __s, __osz)			      \
    ? __ ## f ## _alias (__VA_ARGS__)					      \
    : (__glibc_unsafe_len (__l, __s, __osz)				      \
       ? __ ## f ## _chk_warn (__VA_ARGS__, (__osz) / (__s))		      \
       : __ ## f ## _chk (__VA_ARGS__, (__osz) / (__s))))		      \
 
+#endif
+
+
 #if __GNUC_PREREQ (4,3)
 # define __warnattr(msg) __attribute__((__warning__ (msg)))
 # define __errordecl(name, msg) \
diff --git a/cross/lib/isnan.c b/cross/lib/isnan.c
index 7119bb298e5..39e193b9606 100644
--- a/cross/lib/isnan.c
+++ b/cross/lib/isnan.c
@@ -82,9 +82,10 @@ typedef union { DOUBLE value; unsigned int word[NWORDS]; } memory_double;
 /* Most hosts nowadays use IEEE floating point, so they use IEC 60559
    representations, have infinities and NaNs, and do not trap on
    exceptions.  Define IEEE_FLOATING_POINT if this host is one of the
-   typical ones.  The C11 macro __STDC_IEC_559__ is close to what is
+   typical ones.  The C23 macro __STDC_IEC_60559_BFP__ macro (or its cousin,
+   the now-obsolescent C11 macro __STDC_IEC_559__) is close to what is
    wanted here, but is not quite right because this file does not require
-   all the features of C11 Annex F (and does not require C11 at all,
+   all the features of C23 Annex F (and works even with pre-C11 platforms,
    for that matter).  */
 
 #define IEEE_FLOATING_POINT (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \
diff --git a/cross/lib/libc-config.h b/cross/lib/libc-config.h
index 1d28e58c971..5f5ad010377 100644
--- a/cross/lib/libc-config.h
+++ b/cross/lib/libc-config.h
@@ -137,8 +137,6 @@
 # undef __attribute_returns_twice__
 # undef __attribute_used__
 # undef __attribute_warn_unused_result__
-# undef __bos
-# undef __bos0
 # undef __errordecl
 # undef __extension__
 # undef __extern_always_inline
@@ -147,21 +145,13 @@
 # undef __fortified_attr_access
 # undef __fortify_function
 # undef __glibc_c99_flexarr_available
-# undef __glibc_fortify
-# undef __glibc_fortify_n
 # undef __glibc_has_attribute
 # undef __glibc_has_builtin
 # undef __glibc_has_extension
 # undef __glibc_likely
 # undef __glibc_macro_warning
 # undef __glibc_macro_warning1
-# undef __glibc_objsize
-# undef __glibc_objsize0
-# undef __glibc_safe_len_cond
-# undef __glibc_safe_or_unknown_len
 # undef __glibc_unlikely
-# undef __glibc_unsafe_len
-# undef __glibc_unsigned_or_positive
 # undef __inline
 # undef __ptr_t
 # undef __restrict
@@ -170,6 +160,18 @@
 # undef __va_arg_pack_len
 # undef __warnattr
 # undef __wur
+# ifndef __GNULIB_CDEFS
+#  undef __bos
+#  undef __bos0
+#  undef __glibc_fortify
+#  undef __glibc_fortify_n
+#  undef __glibc_objsize
+#  undef __glibc_objsize0
+#  undef __glibc_safe_len_cond
+#  undef __glibc_safe_or_unknown_len
+#  undef __glibc_unsafe_len
+#  undef __glibc_unsigned_or_positive
+# endif
 
 /* Include our copy of glibc <sys/cdefs.h>.  */
 # include <cdefs.h>
diff --git a/cross/lib/openat-proc.c b/cross/lib/openat-proc.c
index 2a6a85f0696..88f70be4f59 100644
--- a/cross/lib/openat-proc.c
+++ b/cross/lib/openat-proc.c
@@ -30,9 +30,12 @@
 #include <string.h>
 #include <unistd.h>
 
-#ifdef __KLIBC__
+#ifdef __KLIBC__ /* OS/2 */
 # include <InnoTekLIBC/backend.h>
 #endif
+#ifdef __MVS__ /* z/OS */
+# include <termios.h>
+#endif
 
 #include "intprops.h"
 
@@ -53,7 +56,8 @@ openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file)
       return buf;
     }
 
-#ifndef __KLIBC__
+#if !(defined __KLIBC__ || defined __MVS__)
+  /* Generic code for Linux, Solaris, and similar platforms.  */
 # define PROC_SELF_FD_FORMAT "/proc/self/fd/%d/"
   {
     enum {
@@ -107,14 +111,29 @@ openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file)
         dirlen = sprintf (result, PROC_SELF_FD_FORMAT, fd);
       }
   }
-#else
+#else /* (defined __KLIBC__ || defined __MVS__), i.e. OS/2 or z/OS */
   /* OS/2 kLIBC provides a function to retrieve a path from a fd.  */
   {
-    char dir[_MAX_PATH];
     size_t bufsize;
 
+# ifdef __KLIBC__
+    char dir[_MAX_PATH];
     if (__libc_Back_ioFHToPath (fd, dir, sizeof dir))
       return NULL;
+# endif
+# ifdef __MVS__
+    char dir[_XOPEN_PATH_MAX];
+    /* Documentation:
+       https://www.ibm.com/docs/en/zos/2.2.0?topic=functions-w-ioctl-w-pioctl-control-devices */
+    if (w_ioctl (fd, _IOCC_GPN, sizeof dir, dir) < 0)
+      return NULL;
+    /* Documentation:
+       https://www.ibm.com/docs/en/zos/2.2.0?topic=functions-e2a-l-convert-characters-from-ebcdic-ascii */
+    dirlen = __e2a_l (dir, strlen (dir));
+    if (dirlen < 0 || dirlen >= sizeof dir)
+      return NULL;
+    dir[dirlen] = '\0';
+# endif
 
     dirlen = strlen (dir);
     bufsize = dirlen + 1 + strlen (file) + 1; /* 1 for '/', 1 for null */
diff --git a/cross/lib/vasnprintf.c b/cross/lib/vasnprintf.c
index 277c39e3e07..72b8cdbfa6b 100644
--- a/cross/lib/vasnprintf.c
+++ b/cross/lib/vasnprintf.c
@@ -2130,7 +2130,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                           characters = 0;
                         }
 
-                      if (characters < width && !(dp->flags & FLAG_LEFT))
+                      if (characters < width && !(flags & FLAG_LEFT))
                         {
                           size_t n = width - characters;
                           ENSURE_ALLOCATION (xsum (length, n));
@@ -2175,7 +2175,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                       }
 # endif
 
-                      if (characters < width && (dp->flags & FLAG_LEFT))
+                      if (characters < width && (flags & FLAG_LEFT))
                         {
                           size_t n = width - characters;
                           ENSURE_ALLOCATION (xsum (length, n));
@@ -2232,7 +2232,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                           characters = 0;
                         }
 
-                      if (characters < width && !(dp->flags & FLAG_LEFT))
+                      if (characters < width && !(flags & FLAG_LEFT))
                         {
                           size_t n = width - characters;
                           ENSURE_ALLOCATION (xsum (length, n));
@@ -2277,7 +2277,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                       }
 # endif
 
-                      if (characters < width && (dp->flags & FLAG_LEFT))
+                      if (characters < width && (flags & FLAG_LEFT))
                         {
                           size_t n = width - characters;
                           ENSURE_ALLOCATION (xsum (length, n));
@@ -2334,7 +2334,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                           characters = 0;
                         }
 
-                      if (characters < width && !(dp->flags & FLAG_LEFT))
+                      if (characters < width && !(flags & FLAG_LEFT))
                         {
                           size_t n = width - characters;
                           ENSURE_ALLOCATION (xsum (length, n));
@@ -2379,7 +2379,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                       }
 # endif
 
-                      if (characters < width && (dp->flags & FLAG_LEFT))
+                      if (characters < width && (flags & FLAG_LEFT))
                         {
                           size_t n = width - characters;
                           ENSURE_ALLOCATION (xsum (length, n));
@@ -2551,7 +2551,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                       characters = 0;
                     }
 
-                  if (characters < width && !(dp->flags & FLAG_LEFT))
+                  if (characters < width && !(flags & FLAG_LEFT))
                     {
                       size_t n = width - characters;
                       ENSURE_ALLOCATION (xsum (length, n));
@@ -2612,7 +2612,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                         }
                     }
 
-                  if (characters < width && (dp->flags & FLAG_LEFT))
+                  if (characters < width && (flags & FLAG_LEFT))
                     {
                       size_t n = width - characters;
                       ENSURE_ALLOCATION (xsum (length, n));
@@ -2768,7 +2768,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                     /* w doesn't matter.  */
                     w = 0;
 
-                  if (w < width && !(dp->flags & FLAG_LEFT))
+                  if (w < width && !(flags & FLAG_LEFT))
                     {
                       size_t n = width - w;
                       ENSURE_ALLOCATION (xsum (length, n));
@@ -2836,7 +2836,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                   length += tmpdst_len;
 #  endif
 
-                  if (w < width && (dp->flags & FLAG_LEFT))
+                  if (w < width && (flags & FLAG_LEFT))
                     {
                       size_t n = width - w;
                       ENSURE_ALLOCATION (xsum (length, n));
@@ -2977,7 +2977,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                     /* w doesn't matter.  */
                     w = 0;
 
-                  if (w < width && !(dp->flags & FLAG_LEFT))
+                  if (w < width && !(flags & FLAG_LEFT))
                     {
                       size_t n = width - w;
                       ENSURE_ALLOCATION (xsum (length, n));
@@ -3033,7 +3033,7 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp,
                   length += tmpdst_len;
 # endif
 
-                  if (w < width && (dp->flags & FLAG_LEFT))
+                  if (w < width && (flags & FLAG_LEFT))
                     {
                       size_t n = width - w;
                       ENSURE_ALLOCATION (xsum (length, n));
diff --git a/cross/lib/verify.h b/cross/lib/verify.h
index b63cb264321..f0b3fc5851b 100644
--- a/cross/lib/verify.h
+++ b/cross/lib/verify.h
@@ -222,7 +222,21 @@ template <int w>
 
 /* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h.  */
 #ifdef _GL_STATIC_ASSERT_H
-# if !defined _GL_HAVE__STATIC_ASSERT1 && !defined _Static_assert
+/* Define _Static_assert if needed.  */
+/* With clang ≥ 3.8.0 in C++ mode, _Static_assert already works and accepts
+   1 or 2 arguments.  We better don't override it, because clang's standard
+   C++ library uses static_assert inside classes in several places, and our
+   replacement via _GL_VERIFY does not work in these contexts.  */
+# if (defined __cplusplus && defined __clang__ \
+      && (4 <= __clang_major__ + (8 <= __clang_minor__)))
+#  if 5 <= __clang_major__
+/* Avoid "warning: 'static_assert' with no message is a C++17 extension".  */
+#   pragma clang diagnostic ignored "-Wc++17-extensions"
+#  else
+/* Avoid "warning: static_assert with no message is a C++1z extension".  */
+#   pragma clang diagnostic ignored "-Wc++1z-extensions"
+#  endif
+# elif !defined _GL_HAVE__STATIC_ASSERT1 && !defined _Static_assert
 #  if !defined _MSC_VER || defined __clang__
 #   define _Static_assert(...) \
       _GL_VERIFY (__VA_ARGS__, "static assertion failed", -)
@@ -233,6 +247,7 @@ template <int w>
       _GL_VERIFY ((R), "static assertion failed", -)
 #  endif
 # endif
+/* Define static_assert if needed.  */
 # if (!defined static_assert \
       && __STDC_VERSION__ < 202311 \
       && (!defined __cplusplus \
@@ -250,6 +265,8 @@ template <int w>
 #   define _GL_SA3 static_assert
 #   define _GL_SA_PICK(x1,x2,x3,x4,...) x4
 #   define static_assert(...) _GL_EXPAND(_GL_SA_PICK(__VA_ARGS__,_GL_SA3,_GL_SA2,_GL_SA1)) (__VA_ARGS__)
+/* Avoid "fatal error C1189: #error:  The C++ Standard Library forbids macroizing keywords."  */
+#   define _ALLOW_KEYWORD_MACROS 1
 #  else
 #   define static_assert _Static_assert /* C11 requires this #define. */
 #  endif