Merge branch 'release/debian/1.4.2-1'HEADdebian/1.4.2-1master

1 files changed, 417 insertions, 56 deletions

diff --git a/lib/string.in.h b/lib/string.in.h
index f5a6d8b3..33422a06 100644
--- a/lib/string.in.h
+++ b/lib/string.in.h
@@ -1,6 +1,6 @@
 /* A GNU-like <string.h>.
 
-   Copyright (C) 1995-1996, 2001-2024 Free Software Foundation, Inc.
+   Copyright (C) 1995-1996, 2001-2026 Free Software Foundation, Inc.
 
    This file is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
@@ -20,7 +20,7 @@
 #endif
 @PRAGMA_COLUMNS@
 
-#if defined _GL_ALREADY_INCLUDING_STRING_H
+#if defined _@GUARD_PREFIX@_ALREADY_INCLUDING_STRING_H
 /* Special invocation convention:
    - On OS X/NetBSD we have a sequence of nested includes
        <string.h> -> <strings.h> -> "string.h"
@@ -34,12 +34,12 @@
 
 #ifndef _@GUARD_PREFIX@_STRING_H
 
-#define _GL_ALREADY_INCLUDING_STRING_H
+#define _@GUARD_PREFIX@_ALREADY_INCLUDING_STRING_H
 
 /* The include_next requires a split double-inclusion guard.  */
 #@INCLUDE_NEXT@ @NEXT_STRING_H@
 
-#undef _GL_ALREADY_INCLUDING_STRING_H
+#undef _@GUARD_PREFIX@_ALREADY_INCLUDING_STRING_H
 
 #ifndef _@GUARD_PREFIX@_STRING_H
 #define _@GUARD_PREFIX@_STRING_H
@@ -54,6 +54,11 @@
 /* NetBSD 5.0 mis-defines NULL.  */
 #include <stddef.h>
 
+#if @GNULIB_STRERROR_L@
+/* Get locale_t.  */
+# include <locale.h>
+#endif
+
 /* MirBSD defines mbslen as a macro.  */
 #if @GNULIB_MBSLEN@ && defined __MirBSD__
 # include <wchar.h>
@@ -75,6 +80,12 @@
 # include <strings.h>
 #endif
 
+_GL_INLINE_HEADER_BEGIN
+
+#ifndef _GL_STRING_INLINE
+# define _GL_STRING_INLINE _GL_INLINE
+#endif
+
 /* _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.  */
@@ -91,7 +102,7 @@
 /* Applies to: functions.  Cannot be used on inline functions.  */
 #ifndef _GL_ATTRIBUTE_DEALLOC_FREE
 # if defined __cplusplus && defined __GNUC__ && !defined __clang__
-/* Work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108231> */
+/* Work around GCC bug <https://gcc.gnu.org/PR108231> */
 #  define _GL_ATTRIBUTE_DEALLOC_FREE \
      _GL_ATTRIBUTE_DEALLOC ((void (*) (void *)) free, 1)
 # else
@@ -111,6 +122,18 @@
 # endif
 #endif
 
+/* _GL_ATTRIBUTE_NONNULL_IF_NONZERO (NP, NI) declares that the argument NP
+   (a pointer) must not be NULL if the argument NI (an integer) is != 0.  */
+/* Applies to: functions.  */
+#ifndef _GL_ATTRIBUTE_NONNULL_IF_NONZERO
+# if __GNUC__ >= 15 && !defined __clang__
+#  define _GL_ATTRIBUTE_NONNULL_IF_NONZERO(np, ni) \
+     __attribute__ ((__nonnull_if_nonzero__ (np, ni)))
+# else
+#  define _GL_ATTRIBUTE_NONNULL_IF_NONZERO(np, ni)
+# endif
+#endif
+
 /* _GL_ATTRIBUTE_NOTHROW declares that the function does not throw exceptions.
  */
 #ifndef _GL_ATTRIBUTE_NOTHROW
@@ -149,6 +172,7 @@
 
 /* The definition of _GL_WARN_ON_USE is copied here.  */
 
+
 /* Make _GL_ATTRIBUTE_DEALLOC_FREE work, even though <stdlib.h> may not have
    been included yet.  */
 #if @GNULIB_FREE_POSIX@
@@ -193,6 +217,91 @@ _GL_EXTERN_C void free (void *);
 # endif
 #endif
 
+
+/* Declarations for ISO C N3322.  */
+#if defined __GNUC__ && __GNUC__ >= 15 && !defined __clang__
+# ifndef memcpy
+_GL_EXTERN_C void *memcpy (void *__dest, const void *__src, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef memccpy
+_GL_EXTERN_C void *memccpy (void *__dest, const void *__src, int __c, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 4)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 4);
+# endif
+# ifndef memmove
+_GL_EXTERN_C void *memmove (void *__dest, const void *__src, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef strncpy
+_GL_EXTERN_C char *strncpy (char *__dest, const char *__src, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef strndup
+_GL_EXTERN_C char *strndup (const char *__s, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2);
+# endif
+# ifndef strncat
+_GL_EXTERN_C char *strncat (char *__dest, const char *__src, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ARG_NONNULL ((1)) _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef memcmp
+_GL_EXTERN_C int memcmp (const void *__s1, const void *__s2, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef strncmp
+_GL_EXTERN_C int strncmp (const char *__s1, const char *__s2, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# if !defined memchr && !defined __cplusplus
+_GL_EXTERN_C void *memchr (const void *__s, int __c, size_t __n)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+_GL_EXTERN_C void *memrchr (const void *__s, int __c, size_t __n)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+# endif
+# ifndef memset
+_GL_EXTERN_C void *memset (void *__s, int __c, size_t __n)
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+  _GL_ATTRIBUTE_NOTHROW
+#  endif
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+# endif
+# ifndef memset_explicit
+_GL_EXTERN_C void *memset_explicit (void *__s, int __c, size_t __n)
+  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+# endif
+#endif
+
+
 /* Clear a block of memory.  The compiler will not delete a call to
    this function, even if the block is dead after the call.  */
 #if @GNULIB_EXPLICIT_BZERO@
@@ -203,13 +312,13 @@ _GL_FUNCDECL_SYS (explicit_bzero, void,
 _GL_CXXALIAS_SYS (explicit_bzero, void, (void *__dest, size_t __n));
 _GL_CXXALIASWARN (explicit_bzero);
 #elif defined GNULIB_POSIXCHECK
-# undef explicit_bzero
 # if HAVE_RAW_DECL_EXPLICIT_BZERO
 _GL_WARN_ON_USE (explicit_bzero, "explicit_bzero is unportable - "
                  "use gnulib module explicit_bzero for portability");
 # endif
 #endif
 
+
 /* Find the index of the least-significant set bit.  */
 #if @GNULIB_FFSL@
 # if !@HAVE_FFSL@
@@ -218,7 +327,6 @@ _GL_FUNCDECL_SYS (ffsl, int, (long int i), );
 _GL_CXXALIAS_SYS (ffsl, int, (long int i));
 _GL_CXXALIASWARN (ffsl);
 #elif defined GNULIB_POSIXCHECK
-# undef ffsl
 # if HAVE_RAW_DECL_FFSL
 _GL_WARN_ON_USE (ffsl, "ffsl is not portable - use the ffsl module");
 # endif
@@ -241,7 +349,6 @@ _GL_CXXALIAS_SYS (ffsll, int, (long long int i));
 # endif
 _GL_CXXALIASWARN (ffsll);
 #elif defined GNULIB_POSIXCHECK
-# undef ffsll
 # if HAVE_RAW_DECL_FFSLL
 _GL_WARN_ON_USE (ffsll, "ffsll is not portable - use the ffsll module");
 # endif
@@ -276,7 +383,7 @@ _GL_CXXALIASWARN (memccpy);
 #  endif
 _GL_FUNCDECL_RPL (memchr, void *, (void const *__s, int __c, size_t __n),
                                   _GL_ATTRIBUTE_PURE
-                                  _GL_ARG_NONNULL ((1)));
+                                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3));
 _GL_CXXALIAS_RPL (memchr, void *, (void const *__s, int __c, size_t __n));
 # else
   /* On some systems, this function is defined as an overloaded function:
@@ -299,10 +406,26 @@ _GL_CXXALIASWARN1 (memchr, void const *,
 _GL_CXXALIASWARN (memchr);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef memchr
 /* Assume memchr is always declared.  */
-_GL_WARN_ON_USE (memchr, "memchr has platform-specific bugs - "
-                 "use gnulib module memchr for portability" );
+_GL_WARN_ON_USE_CXX (memchr,
+                     const void *, void *, (void const *, int, size_t),
+                     "memchr has platform-specific bugs - "
+                     "use gnulib module memchr for portability" );
+#endif
+
+/* Are S1 and S2, of size N, bytewise equal?  */
+#if @GNULIB_STRINGEQ@ && !@HAVE_DECL_MEMEQ@
+# ifdef __cplusplus
+extern "C" {
+# endif
+_GL_STRING_INLINE bool
+memeq (void const *__s1, void const *__s2, size_t __n)
+{
+  return !memcmp (__s1, __s2, __n);
+}
+# ifdef __cplusplus
+}
+# endif
 #endif
 
 /* Return the first occurrence of NEEDLE in HAYSTACK.  */
@@ -333,7 +456,6 @@ _GL_CXXALIAS_SYS (memmem, void *,
 # endif
 _GL_CXXALIASWARN (memmem);
 #elif defined GNULIB_POSIXCHECK
-# undef memmem
 # if HAVE_RAW_DECL_MEMMEM
 _GL_WARN_ON_USE (memmem, "memmem is unportable and often quadratic - "
                  "use gnulib module memmem-simple for portability, "
@@ -371,7 +493,6 @@ _GL_CXXALIAS_SYS (mempcpy, void *,
 _GL_CXXALIASWARN (mempcpy);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef mempcpy
 # if HAVE_RAW_DECL_MEMPCPY
 _GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
                  "use gnulib module mempcpy for portability");
@@ -383,7 +504,7 @@ _GL_WARN_ON_USE (mempcpy, "mempcpy is unportable - "
 # if ! @HAVE_DECL_MEMRCHR@
 _GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t),
                                    _GL_ATTRIBUTE_PURE
-                                   _GL_ARG_NONNULL ((1)));
+                                   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3));
 # endif
   /* On some systems, this function is defined as an overloaded function:
        extern "C++" { const void * std::memrchr (const void *, int, size_t); }
@@ -404,7 +525,6 @@ _GL_CXXALIASWARN1 (memrchr, void const *,
 _GL_CXXALIASWARN (memrchr);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef memrchr
 # if HAVE_RAW_DECL_MEMRCHR
 _GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
                  "use gnulib module memrchr for portability");
@@ -420,18 +540,21 @@ _GL_WARN_ON_USE (memrchr, "memrchr is unportable - "
 #   define memset_explicit rpl_memset_explicit
 #  endif
 _GL_FUNCDECL_RPL (memset_explicit, void *,
-                  (void *__dest, int __c, size_t __n), _GL_ARG_NONNULL ((1)));
+                  (void *__dest, int __c, size_t __n),
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3));
 _GL_CXXALIAS_RPL (memset_explicit, void *, (void *__dest, int __c, size_t __n));
 # else
 #  if !@HAVE_MEMSET_EXPLICIT@
 _GL_FUNCDECL_SYS (memset_explicit, void *,
-                  (void *__dest, int __c, size_t __n), _GL_ARG_NONNULL ((1)));
+                  (void *__dest, int __c, size_t __n),
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3));
 #  endif
 _GL_CXXALIAS_SYS (memset_explicit, void *, (void *__dest, int __c, size_t __n));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (memset_explicit);
+# endif
 #elif defined GNULIB_POSIXCHECK
-# undef memset_explicit
 # if HAVE_RAW_DECL_MEMSET_EXPLICIT
 _GL_WARN_ON_USE (memset_explicit, "memset_explicit is unportable - "
                  "use gnulib module memset_explicit for portability");
@@ -466,7 +589,6 @@ _GL_CXXALIASWARN1 (rawmemchr, void const *,
 _GL_CXXALIASWARN (rawmemchr);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef rawmemchr
 # if HAVE_RAW_DECL_RAWMEMCHR
 _GL_WARN_ON_USE (rawmemchr, "rawmemchr is unportable - "
                  "use gnulib module rawmemchr for portability");
@@ -498,7 +620,6 @@ _GL_CXXALIAS_SYS (stpcpy, char *,
 _GL_CXXALIASWARN (stpcpy);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef stpcpy
 # if HAVE_RAW_DECL_STPCPY
 _GL_WARN_ON_USE (stpcpy, "stpcpy is unportable - "
                  "use gnulib module stpcpy for portability");
@@ -535,7 +656,6 @@ _GL_CXXALIAS_SYS (stpncpy, char *,
 _GL_CXXALIASWARN (stpncpy);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef stpncpy
 # if HAVE_RAW_DECL_STPNCPY
 _GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
                  "use gnulib module stpncpy for portability");
@@ -545,7 +665,6 @@ _GL_WARN_ON_USE (stpncpy, "stpncpy is unportable - "
 #if defined GNULIB_POSIXCHECK
 /* strchr() does not work with multibyte strings if the locale encoding is
    GB18030 and the character to be searched is a digit.  */
-# undef strchr
 /* Assume strchr is always declared.  */
 _GL_WARN_ON_USE_CXX (strchr,
                      const char *, char *, (const char *, int),
@@ -591,7 +710,6 @@ _GL_CXXALIASWARN1 (strchrnul, char const *,
 _GL_CXXALIASWARN (strchrnul);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef strchrnul
 # if HAVE_RAW_DECL_STRCHRNUL
 _GL_WARN_ON_USE (strchrnul, "strchrnul is unportable - "
                  "use gnulib module strchrnul for portability");
@@ -656,7 +774,6 @@ _GL_FUNCDECL_SYS (strdup, char *,
 #  endif
 # endif
 # if defined GNULIB_POSIXCHECK
-#  undef strdup
 #  if HAVE_RAW_DECL_STRDUP
 _GL_WARN_ON_USE (strdup, "strdup is unportable - "
                  "use gnulib module strdup for portability");
@@ -681,6 +798,21 @@ _GL_CXXALIASWARN (strdup);
 # endif
 #endif
 
+/* Are strings S1 and S2 equal?  */
+#if @GNULIB_STRINGEQ@ && !@HAVE_DECL_STREQ@
+# ifdef __cplusplus
+extern "C" {
+# endif
+_GL_STRING_INLINE bool
+streq (char const *__s1, char const *__s2)
+{
+  return !strcmp (__s1, __s2);
+}
+# ifdef __cplusplus
+}
+# endif
+#endif
+
 /* Append no more than N characters from SRC onto DEST.  */
 #if @GNULIB_STRNCAT@
 # if @REPLACE_STRNCAT@
@@ -690,7 +822,8 @@ _GL_CXXALIASWARN (strdup);
 #  endif
 _GL_FUNCDECL_RPL (strncat, char *,
                   (char *restrict dest, const char *restrict src, size_t n),
-                  _GL_ARG_NONNULL ((1, 2)));
+                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3));
 _GL_CXXALIAS_RPL (strncat, char *,
                   (char *restrict dest, const char *restrict src, size_t n));
 # else
@@ -701,13 +834,41 @@ _GL_CXXALIAS_SYS (strncat, char *,
 _GL_CXXALIASWARN (strncat);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef strncat
 # if HAVE_RAW_DECL_STRNCAT
 _GL_WARN_ON_USE (strncat, "strncat is unportable - "
                  "use gnulib module strncat for portability");
 # endif
 #endif
 
+/* Copy no more than N bytes of SRC to DST, returning DST.  */
+#if @GNULIB_STRNCPY@
+# if @REPLACE_STRNCPY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strncpy
+#   define strncpy rpl_strncpy
+#  endif
+_GL_FUNCDECL_RPL (strncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n),
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (strncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n));
+# else
+_GL_CXXALIAS_SYS (strncpy, char *,
+                  (char *restrict __dst, char const *restrict __src,
+                   size_t __n));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strncpy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# if HAVE_RAW_DECL_STRNCPY
+_GL_WARN_ON_USE (strncpy, "strncpy is unportable - "
+                 "use gnulib module strncpy for portability");
+# endif
+#endif
+
 /* Return a newly allocated copy of at most N bytes of STRING.  */
 #if @GNULIB_STRNDUP@
 # if @REPLACE_STRNDUP@
@@ -717,7 +878,7 @@ _GL_WARN_ON_USE (strncat, "strncat is unportable - "
 #  endif
 _GL_FUNCDECL_RPL (strndup, char *,
                   (char const *__s, size_t __n),
-                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2)
                   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
 _GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
 # else
@@ -726,13 +887,13 @@ _GL_CXXALIAS_RPL (strndup, char *, (char const *__s, size_t __n));
 #   if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
 _GL_FUNCDECL_SYS (strndup, char *,
                   (char const *__s, size_t __n),
-                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2)
                   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE)
                   _GL_ATTRIBUTE_NOTHROW;
 #   else
 _GL_FUNCDECL_SYS (strndup, char *,
                   (char const *__s, size_t __n),
-                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2)
                   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
 #   endif
 #  endif
@@ -745,18 +906,17 @@ _GL_CXXALIASWARN (strndup);
 #  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
 _GL_FUNCDECL_SYS (strndup, char *,
                   (char const *__s, size_t __n),
-                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2)
                   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE)
                   _GL_ATTRIBUTE_NOTHROW;
 #  else
 _GL_FUNCDECL_SYS (strndup, char *,
                   (char const *__s, size_t __n),
-                  _GL_ARG_NONNULL ((1))
+                  _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2)
                   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE);
 #  endif
 # endif
 # if defined GNULIB_POSIXCHECK
-#  undef strndup
 #  if HAVE_RAW_DECL_STRNDUP
 _GL_WARN_ON_USE (strndup, "strndup is unportable - "
                  "use gnulib module strndup for portability");
@@ -787,7 +947,6 @@ _GL_CXXALIAS_SYS (strnlen, size_t, (char const *__s, size_t __maxlen));
 # endif
 _GL_CXXALIASWARN (strnlen);
 #elif defined GNULIB_POSIXCHECK
-# undef strnlen
 # if HAVE_RAW_DECL_STRNLEN
 _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
                  "use gnulib module strnlen for portability");
@@ -799,7 +958,6 @@ _GL_WARN_ON_USE (strnlen, "strnlen is unportable - "
    Even in this simple case, it does not work with multibyte strings if the
    locale encoding is GB18030 and one of the characters to be searched is a
    digit.  */
-# undef strcspn
 /* Assume strcspn is always declared.  */
 _GL_WARN_ON_USE (strcspn, "strcspn cannot work correctly on character strings "
                  "in multibyte locales - "
@@ -836,7 +994,6 @@ _GL_CXXALIASWARN (strpbrk);
    Even in this simple case, it does not work with multibyte strings if the
    locale encoding is GB18030 and one of the characters to be searched is a
    digit.  */
-#  undef strpbrk
 _GL_WARN_ON_USE_CXX (strpbrk,
                      const char *, char *, (const char *, const char *),
                      "strpbrk cannot work correctly on character strings "
@@ -856,7 +1013,6 @@ _GL_WARN_ON_USE_CXX (strpbrk,
 #if defined GNULIB_POSIXCHECK
 /* strspn() assumes the second argument is a list of single-byte characters.
    Even in this simple case, it cannot work with multibyte strings.  */
-# undef strspn
 /* Assume strspn is always declared.  */
 _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
                  "in multibyte locales - "
@@ -866,7 +1022,6 @@ _GL_WARN_ON_USE (strspn, "strspn cannot work correctly on character strings "
 #if defined GNULIB_POSIXCHECK
 /* strrchr() does not work with multibyte strings if the locale encoding is
    GB18030 and the character to be searched is a digit.  */
-# undef strrchr
 /* Assume strrchr is always declared.  */
 _GL_WARN_ON_USE_CXX (strrchr,
                      const char *, char *, (const char *, int),
@@ -901,13 +1056,11 @@ _GL_CXXALIAS_SYS (strsep, char *,
                   (char **restrict __stringp, char const *restrict __delim));
 _GL_CXXALIASWARN (strsep);
 # if defined GNULIB_POSIXCHECK
-#  undef strsep
 _GL_WARN_ON_USE (strsep, "strsep cannot work correctly on character strings "
                  "in multibyte locales - "
                  "use mbssep if you care about internationalization");
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef strsep
 # if HAVE_RAW_DECL_STRSEP
 _GL_WARN_ON_USE (strsep, "strsep is unportable - "
                  "use gnulib module strsep for portability");
@@ -950,11 +1103,13 @@ _GL_CXXALIASWARN (strstr);
    as a sequence of bytes, not of characters.  */
 # undef strstr
 /* Assume strstr is always declared.  */
-_GL_WARN_ON_USE (strstr, "strstr is quadratic on many systems, and cannot "
-                 "work correctly on character strings in most "
-                 "multibyte locales - "
-                 "use mbsstr if you care about internationalization, "
-                 "or use strstr if you care about speed");
+_GL_WARN_ON_USE_CXX (strstr,
+                     const char *, char *, (const char *, const char *),
+                     "strstr is quadratic on many systems, and cannot "
+                     "work correctly on character strings in most "
+                     "multibyte locales - "
+                     "use mbsstr if you care about internationalization, "
+                     "or use strstr if you care about speed");
 #endif
 
 /* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
@@ -1000,7 +1155,6 @@ _GL_CXXALIASWARN (strcasestr);
 /* strcasestr() does not work with multibyte strings:
    It is a glibc extension, and glibc implements it only for unibyte
    locales.  */
-# undef strcasestr
 # if HAVE_RAW_DECL_STRCASESTR
 _GL_WARN_ON_USE (strcasestr, "strcasestr does work correctly on character "
                  "strings in multibyte locales - "
@@ -1046,7 +1200,7 @@ _GL_CXXALIAS_RPL (strtok_r, char *,
                   (char *restrict s, char const *restrict delim,
                    char **restrict save_ptr));
 # else
-#  if @UNDEFINE_STRTOK_R@ || defined GNULIB_POSIXCHECK
+#  if @UNDEFINE_STRTOK_R@
 #   undef strtok_r
 #  endif
 #  if ! @HAVE_DECL_STRTOK_R@
@@ -1066,7 +1220,6 @@ _GL_WARN_ON_USE (strtok_r, "strtok_r cannot work correctly on character "
                  "use mbstok_r if you care about internationalization");
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef strtok_r
 # if HAVE_RAW_DECL_STRTOK_R
 _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
                  "use gnulib module strtok_r for portability");
@@ -1077,13 +1230,87 @@ _GL_WARN_ON_USE (strtok_r, "strtok_r is unportable - "
 /* The following functions are not specified by POSIX.  They are gnulib
    extensions.  */
 
+#if @GNULIB_STRNUL@
+/* Returns a pointer to the terminating NUL byte of STRING.
+     strnul (string)
+   This is a type-generic macro:
+   If STRING is a 'const char *', the result is 'const char *'.
+   If STRING is a 'char *', the result is 'char *'.
+   It is equivalent to
+     string + strlen (string)
+   or to
+     strchr (string, '\0').  */
+# ifdef __cplusplus
+extern "C" {
+# endif
+_GL_STRING_INLINE const char *gl_strnul (const char *string)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1));
+_GL_STRING_INLINE const char *gl_strnul (const char *string)
+{
+  /* In gcc >= 7 or clang >= 4, we could use the expression
+       strchr (string, '\0')
+     because these compiler versions produce identical code for both
+     expressions.  But this optimization in not available in older
+     compiler versions, and is also not available when the compiler
+     option '-fno-builtin' is in use.  */
+  return string + strlen (string);
+}
+# ifdef __cplusplus
+}
+# endif
+# ifdef __cplusplus
+template <typename T> T strnul (T);
+template <> inline const char *strnul<const char *> (const char *s)
+{ return gl_strnul (s); }
+template <> inline       char *strnul<      char *> (      char *s)
+{ return const_cast<char *>(gl_strnul (s)); }
+# else
+#  if (defined __GNUC__ && __GNUC__ + (__GNUC_MINOR__ >= 9) > 4 && !defined __cplusplus) \
+      || (defined __clang__ && __clang_major__ >= 3) \
+      || (defined __SUNPRO_C && __SUNPRO_C >= 0x5150) \
+      || (__STDC_VERSION__ >= 201112L && !defined __GNUC__)
+/* The compiler supports _Generic from ISO C11.  */
+/* Since in C (but not in C++!), any function that accepts a '[const] char *'
+   also accepts a '[const] void *' as argument, we make sure that the function-
+   like macro does the same, by mapping its type first:
+     char *, void *             -> void *
+     const char *, const void * -> const void *
+   This mapping is done through the conditional expression.  */
+#   define strnul(s) \
+      _Generic (1 ? (s) : (void *) 99, \
+                void *       : (char *) gl_strnul (s), \
+                const void * : gl_strnul (s))
+#  else
+#   define strnul(s) \
+      ((char *) gl_strnul (s))
+#  endif
+# endif
+#endif
+
+#if @GNULIB_STR_STARTSWITH@
+/* Returns true if STRING starts with PREFIX.
+   Returns false otherwise.  */
+_GL_EXTERN_C bool str_startswith (const char *string, const char *prefix)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
+#if @GNULIB_STR_ENDSWITH@
+/* Returns true if STRING ends with SUFFIX.
+   Returns false otherwise.  */
+_GL_EXTERN_C bool str_endswith (const char *string, const char *prefix)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
 #if @GNULIB_MBSLEN@
 /* Return the number of multibyte characters in the character string STRING.
    This considers multibyte characters, unlike strlen, which counts bytes.  */
 # ifdef __MirBSD__  /* MirBSD defines mbslen as a macro.  Override it.  */
 #  undef mbslen
 # endif
-# if @HAVE_MBSLEN@  /* AIX, OSF/1, MirBSD define mbslen already in libc.  */
+# if @HAVE_MBSLEN@  /* AIX, MirBSD define mbslen already in libc.  */
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 #   define mbslen rpl_mbslen
 #  endif
@@ -1162,6 +1389,33 @@ _GL_CXXALIASWARN (mbsrchr);
 _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle)
      _GL_ATTRIBUTE_PURE
      _GL_ARG_NONNULL ((1, 2));
+# ifndef _GL_NO_CONST_GENERICS
+/* Don't silently convert a 'const char *' to a 'char *'.  Programmers want
+   compiler warnings for 'const' related mistakes.  */
+#  ifdef __cplusplus
+extern "C++" { /* needed for AIX */
+template <typename T>
+  T * mbsstr_template (T* haystack, const char *needle);
+template <>
+  inline char * mbsstr_template (char *haystack, const char *needle)
+  { return mbsstr (haystack, needle); }
+template <>
+  inline const char * mbsstr_template (const char *haystack, const char *needle)
+  { return mbsstr (haystack, needle); }
+}
+#   undef mbsstr
+#   define mbsstr mbsstr_template
+#  elif !defined mbsstr
+#   if ((__GNUC__ + (__GNUC_MINOR__ >= 9) > 4) || (__clang_major__ >= 3) \
+        || defined __ICC  || defined __TINYC__ \
+        || (__STDC_VERSION__ >= 201112L && !(defined __GNUC__ || defined __clang__)))
+#    define mbsstr(h,n) \
+       _Generic ((h), \
+                 char const *: (char const *) mbsstr ((h), (n)), \
+                 default     :                mbsstr ((h), (n)))
+#   endif
+#  endif
+# endif
 #endif
 
 #if @GNULIB_MBSCASECMP@
@@ -1203,6 +1457,33 @@ _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n)
 _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
      _GL_ATTRIBUTE_PURE
      _GL_ARG_NONNULL ((1, 2));
+# ifndef _GL_NO_CONST_GENERICS
+/* Don't silently convert a 'const char *' to a 'char *'.  Programmers want
+   compiler warnings for 'const' related mistakes.  */
+#  ifdef __cplusplus
+extern "C++" { /* needed for AIX */
+template <typename T>
+  T * mbspcasecmp_template (T* string, const char *prefix);
+template <>
+  inline char * mbspcasecmp_template (char *string, const char *prefix)
+  { return mbspcasecmp (string, prefix); }
+template <>
+  inline const char * mbspcasecmp_template (const char *string, const char *prefix)
+  { return mbspcasecmp (string, prefix); }
+}
+#   undef mbspcasecmp
+#   define mbspcasecmp mbspcasecmp_template
+#  elif !defined mbspcasecmp
+#   if ((__GNUC__ + (__GNUC_MINOR__ >= 9) > 4) || (__clang_major__ >= 3) \
+        || defined __ICC  || defined __TINYC__ \
+        || (__STDC_VERSION__ >= 201112L && !(defined __GNUC__ || defined __clang__)))
+#    define mbspcasecmp(s,p) \
+       _Generic ((s), \
+                 char const *: (char const *) mbspcasecmp ((s), (p)), \
+                 default     :                mbspcasecmp ((s), (p)))
+#   endif
+#  endif
+# endif
 #endif
 
 #if @GNULIB_MBSCASESTR@
@@ -1214,6 +1495,33 @@ _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix)
 _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle)
      _GL_ATTRIBUTE_PURE
      _GL_ARG_NONNULL ((1, 2));
+# ifndef _GL_NO_CONST_GENERICS
+/* Don't silently convert a 'const char *' to a 'char *'.  Programmers want
+   compiler warnings for 'const' related mistakes.  */
+#  ifdef __cplusplus
+extern "C++" { /* needed for AIX */
+template <typename T>
+  T * mbscasestr_template (T* haystack, const char *needle);
+template <>
+  inline char * mbscasestr_template (char *haystack, const char *needle)
+  { return mbscasestr (haystack, needle); }
+template <>
+  inline const char * mbscasestr_template (const char *haystack, const char *needle)
+  { return mbscasestr (haystack, needle); }
+}
+#   undef mbscasestr
+#   define mbscasestr mbscasestr_template
+#  elif !defined mbscasestr
+#   if ((__GNUC__ + (__GNUC_MINOR__ >= 9) > 4) || (__clang_major__ >= 3) \
+        || defined __ICC  || defined __TINYC__ \
+        || (__STDC_VERSION__ >= 201112L && !(defined __GNUC__ || defined __clang__)))
+#    define mbscasestr(h,n) \
+       _Generic ((h), \
+                 char const *: (char const *) mbscasestr ((h), (n)), \
+                 default     :                mbscasestr ((h), (n)))
+#   endif
+#  endif
+# endif
 #endif
 
 #if @GNULIB_MBSCSPN@
@@ -1301,6 +1609,26 @@ _GL_EXTERN_C char * mbstok_r (char *restrict string, const char *delim,
      _GL_ARG_NONNULL ((2, 3));
 #endif
 
+#if @GNULIB_MBS_STARTSWITH@
+/* Returns true if STRING starts with PREFIX.
+   Returns false otherwise.  */
+_GL_EXTERN_C bool mbs_startswith (const char *string, const char *prefix)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+/* No extra code is needed for multibyte locales for this function.  */
+# define mbs_startswith str_startswith
+#endif
+
+#if @GNULIB_MBS_ENDSWITH@
+/* Returns true if STRING ends with SUFFIX.
+   Returns false otherwise.
+   Unlike str_endswith(), this function works correctly in multibyte locales.
+ */
+_GL_EXTERN_C bool mbs_endswith (const char *string, const char *suffix)
+     _GL_ATTRIBUTE_PURE
+     _GL_ARG_NONNULL ((1, 2));
+#endif
+
 /* Map any int, typically from errno, into an error message.  */
 #if @GNULIB_STRERROR@
 # if @REPLACE_STRERROR@
@@ -1317,7 +1645,6 @@ _GL_CXXALIAS_SYS (strerror, char *, (int));
 _GL_CXXALIASWARN (strerror);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef strerror
 /* Assume strerror is always declared.  */
 _GL_WARN_ON_USE (strerror, "strerror is unportable - "
                  "use gnulib module strerror to guarantee non-NULL result");
@@ -1345,13 +1672,49 @@ _GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
 _GL_CXXALIASWARN (strerror_r);
 # endif
 #elif defined GNULIB_POSIXCHECK
-# undef strerror_r
 # if HAVE_RAW_DECL_STRERROR_R
 _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
                  "use gnulib module strerror_r-posix for portability");
 # endif
 #endif
 
+/* Map any int, typically from errno, into an error message.
+   With locale_t argument.  */
+#if @GNULIB_STRERROR_L@
+# if @REPLACE_STRERROR_L@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strerror_l
+#   define strerror_l rpl_strerror_l
+#  endif
+_GL_FUNCDECL_RPL (strerror_l, char *, (int errnum, locale_t locale),
+                                                   _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (strerror_l, char *, (int errnum, locale_t locale));
+# else
+#  if !@HAVE_STRERROR_L@
+_GL_FUNCDECL_SYS (strerror_l, char *, (int errnum, locale_t locale),
+                                                   _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (strerror_l, char *, (int errnum, locale_t locale));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (strerror_l);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# if HAVE_RAW_DECL_STRERROR_L
+_GL_WARN_ON_USE (strerror_l, "strerror_l is unportable - "
+                 "use gnulib module strerror_l for portability");
+# endif
+#endif
+
+/* Map any int, typically from errno, into an error message.  Multithread-safe,
+   with locale_t argument.
+   Not portable! Only provided by gnulib.  */
+#if @GNULIB_STRERROR_L@
+_GL_FUNCDECL_SYS (strerror_l_r, int,
+                  (int errnum, char *buf, size_t buflen, locale_t locale),
+                  _GL_ARG_NONNULL ((2, 4)));
+#endif
+
 /* Return the name of the system error code ERRNUM.  */
 #if @GNULIB_STRERRORNAME_NP@
 # if @REPLACE_STRERRORNAME_NP@
@@ -1367,9 +1730,10 @@ _GL_FUNCDECL_SYS (strerrorname_np, const char *, (int errnum), );
 #  endif
 _GL_CXXALIAS_SYS (strerrorname_np, const char *, (int errnum));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (strerrorname_np);
+# endif
 #elif defined GNULIB_POSIXCHECK
-# undef strerrorname_np
 # if HAVE_RAW_DECL_STRERRORNAME_NP
 _GL_WARN_ON_USE (strerrorname_np, "strerrorname_np is unportable - "
                  "use gnulib module strerrorname_np for portability");
@@ -1384,7 +1748,6 @@ _GL_FUNCDECL_SYS (sigabbrev_np, const char *, (int sig), );
 _GL_CXXALIAS_SYS (sigabbrev_np, const char *, (int sig));
 _GL_CXXALIASWARN (sigabbrev_np);
 #elif defined GNULIB_POSIXCHECK
-# undef sigabbrev_np
 # if HAVE_RAW_DECL_SIGABBREV_NP
 _GL_WARN_ON_USE (sigabbrev_np, "sigabbrev_np is unportable - "
                  "use gnulib module sigabbrev_np for portability");
@@ -1399,7 +1762,6 @@ _GL_FUNCDECL_SYS (sigdescr_np, const char *, (int sig), );
 _GL_CXXALIAS_SYS (sigdescr_np, const char *, (int sig));
 _GL_CXXALIASWARN (sigdescr_np);
 #elif defined GNULIB_POSIXCHECK
-# undef sigdescr_np
 # if HAVE_RAW_DECL_SIGDESCR_NP
 _GL_WARN_ON_USE (sigdescr_np, "sigdescr_np is unportable - "
                  "use gnulib module sigdescr_np for portability");
@@ -1423,7 +1785,6 @@ _GL_CXXALIAS_SYS_CAST (strsignal, char *, (int __sig));
 # endif
 _GL_CXXALIASWARN (strsignal);
 #elif defined GNULIB_POSIXCHECK
-# undef strsignal
 # if HAVE_RAW_DECL_STRSIGNAL
 _GL_WARN_ON_USE (strsignal, "strsignal is unportable - "
                  "use gnulib module strsignal for portability");
@@ -1449,13 +1810,13 @@ _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
 # endif
 _GL_CXXALIASWARN (strverscmp);
 #elif defined GNULIB_POSIXCHECK
-# undef strverscmp
 # if HAVE_RAW_DECL_STRVERSCMP
 _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
                  "use gnulib module strverscmp for portability");
 # endif
 #endif
 
+_GL_INLINE_HEADER_END
 
 #endif /* _@GUARD_PREFIX@_STRING_H */
 #endif /* _@GUARD_PREFIX@_STRING_H */