stdbit-h: avoid <byteswap.h> namespace pollution

* lib/stdbit.in.h (_GL_STDBIT_HAS_BUILTIN_BSWAP16)
(_GL_STDBIT_HAS_BUILTIN_BSWAP32, _GL_STDBIT_HAS_BUILTIN_BSWAP64)
(_GL_STDBIT_BSWAP16, _GL_STDBIT_BSWAP32, _GL_STDBIT_BSWAP64):
New macros.  All uses of bswap_16, bswap_32, bswap_64 changed.

stdbit-h: avoid <string.h> namespace pollution

* lib/stdbit.in.h (_GL_STDBIT_MEMCPY): New macro.
All uses of memcpy changed.

stdbit-h: __has_builtin (__builtin_assume_aligned)

Prefer the usual pattern for checking for builtins:
allow __has_builtin for compilers that are not Clang or GCC
where we already have something.
* lib/stdbit.in.h (_GL_HAS_BUILTIN_ASSUME_ALIGNED): New macro.
(_GL_STDBIT_ASSUME_ALIGNED): Use it.

doc: assume copy to int preserves low order bits

doc: fix typos re Unisys ClearPath Libra

stdbit-h: adjust comments to match code

* lib/stdbit.in.h: Adjust commentary to match code’s types
and use of if rather than #if.

stdbit-h: restore optimization for RISC-V etc

Problem reported by Bruno Haible in:
https://lists.gnu.org/r/bug-gnulib/2026-03/msg00098.html
This patch does the optimization in a different way,
preferring plain ‘if’ to ‘#if’ if either will do.
* lib/stdbit.in.h: Bring back includes for byteswap.h, string.h.
(_GL_STDBIT_OPTIMIZE_VIA_MEMCPY, _GL_STDBIT_ASSUME_ALIGNED)
(_GL_STDBIT_BIGENDIAN): New macros.
(stdc_load8_beu16, stdc_load8_leu16):
Bring back casts to uint_fast16_t.
(stdc_load8_aligned_beu16, stdc_load8_aligned_beu32)
(stdc_load8_aligned_beu64, stdc_load8_aligned_leu16)
(stdc_load8_aligned_leu32, stdc_load8_aligned_leu64)
(stdc_load8_aligned_bes8, stdc_load8_aligned_bes16)
(stdc_load8_aligned_bes32, stdc_load8_aligned_bes64)
(stdc_load8_aligned_les8, stdc_load8_aligned_les16)
(stdc_load8_aligned_les32, stdc_load8_aligned_les64)
(stdc_store8_aligned_beu16, stdc_store8_aligned_beu32)
(stdc_store8_aligned_beu64, stdc_store8_aligned_leu16)
(stdc_store8_aligned_leu32, stdc_store8_aligned_leu64)
(stdc_store8_aligned_bes8, stdc_store8_aligned_bes16)
(stdc_store8_aligned_bes32, stdc_store8_aligned_bes64)
(stdc_store8_aligned_les8, stdc_store8_aligned_les16)
(stdc_store8_aligned_les32, stdc_store8_aligned_les64):
Bring back the memcpy optimization if _GL_STDBIT_OPTIMIZE_VIA_MEMCPY.
* modules/stdc_load8_aligned (Depends-on):
* modules/stdc_store8_aligned (Depends-on):
Go back to depending on byteswap.

stdbit-h: fewer casts

* lib/stdbit.in.h (stdc_load8_beu16, stdc_load8_leu16)
(stdc_store8_beu16, stdc_store8_beu32, stdc_store8_beu64)
(stdc_store8_leu16, stdc_store8_leu32, stdc_store8_leu64):
Avoid unnecessary and sometimes-confusing casts.

stdbit-h: simplify stdc_{load,store)_[bl]e[s]*

* lib/stdbit.in.h (stdc_load8_bes8, stdc_load8_bes16)
(stdc_load8_bes32, stdc_load8_bes64, stdc_load8_les8)
(stdc_load8_les16, stdc_load8_les32, stdc_load8_les64)
(stdc_store8_bes8, stdc_store8_bes16, stdc_store8_bes32)
(stdc_store8_bes64, stdc_store8_les8, stdc_store8_les16)
(stdc_store8_les32, stdc_store8_les64):
Simplify by deferring to the unsigned counterpart.

stdbit-h: simpler fix for -fno-strict-aliasing

* lib/stdbit.in.h: Do not include byteswap.h.
(_GL_LOADSTORE8_VARIANT_A, _GL_LOADSTORE8_VARIANT_E)
(_GL_LOADSTORE8_VARIANT_F): Remove.
(stdc_load8_aligned_beu8, stdc_load8_aligned_beu16)
(stdc_load8_aligned_beu32, stdc_load8_aligned_beu64)
(stdc_load8_aligned_leu8, stdc_load8_aligned_leu16)
(stdc_load8_aligned_leu32, stdc_load8_aligned_leu64)
(stdc_load8_aligned_bes8, stdc_load8_aligned_bes16)
(stdc_load8_aligned_bes32, stdc_load8_aligned_bes64)
(stdc_load8_aligned_les8, stdc_load8_aligned_les16)
(stdc_load8_aligned_les32, stdc_load8_aligned_les64)
(stdc_store8_aligned_beu8, stdc_store8_aligned_beu16)
(stdc_store8_aligned_beu32, stdc_store8_aligned_beu64)
(stdc_store8_aligned_leu8, stdc_store8_aligned_leu16)
(stdc_store8_aligned_leu32, stdc_store8_aligned_leu64)
(stdc_store8_aligned_bes8, stdc_store8_aligned_bes16)
(stdc_store8_aligned_bes32, stdc_store8_aligned_bes64)
(stdc_store8_aligned_les8, stdc_store8_aligned_les16)
(stdc_store8_aligned_les32, stdc_store8_aligned_les64):
Simplifly by deferring to their unaligned counterparts.
* modules/stdc_load8_aligned (Depends-on):
Depend on stdc_load8, not byteswap.
* modules/stdc_store8_aligned (Depends-on):
Depend on stdc_store8, not byteswap.

stdbit-h: add test for recent aligned issue.

Adapted from test by Lasse Collin <lasse.collin@tukaani.org> in
<https://lists.gnu.org/archive/html/bug-gnulib/2026-03/msg00094.html>.
* modules/stdc_store8_aligned-tests (Depends-on):
Depend on stdc_load8_aligned.
* tests/test-stdc_store8_aligned.c (test_strict_aliasing): New test.
(main): Use it.

stdc_load8_aligned, stdc_store8_aligned: Fix strict aliasing violations.

Reported by Lasse Collin <lasse.collin@tukaani.org> in
<https://lists.gnu.org/archive/html/bug-gnulib/2026-03/msg00094.html>.

* lib/stdbit.in.h: Include <string.h>.
(_GL_LOADSTORE8_VARIANT_A, _GL_LOADSTORE8_VARIANT_E,
_GL_LOADSTORE8_VARIANT_F): New macros.
(stdc_load8_aligned_beu16, stdc_load8_aligned_beu32,
stdc_load8_aligned_beu64, stdc_load8_aligned_leu16,
stdc_load8_aligned_leu32, stdc_load8_aligned_leu64,
stdc_load8_aligned_bes8, stdc_load8_aligned_bes16,
stdc_load8_aligned_bes32, stdc_load8_aligned_bes64,
stdc_load8_aligned_les8, stdc_load8_aligned_les16,
stdc_load8_aligned_les32, stdc_load8_aligned_les64,
stdc_load8_bes8, stdc_load8_les8, stdc_store8_aligned_beu16,
stdc_store8_aligned_beu32, stdc_store8_aligned_beu64,
stdc_store8_aligned_leu16, stdc_store8_aligned_leu32,
stdc_store8_aligned_leu64, stdc_store8_aligned_bes8,
stdc_store8_aligned_bes16, stdc_store8_aligned_bes32,
stdc_store8_aligned_bes64, stdc_store8_aligned_les8,
stdc_store8_aligned_les16, stdc_store8_aligned_les32,
stdc_store8_aligned_les64): Don't cast a pointer to a pointer to a
different element type.

stdc_store8: Add tests.

* tests/test-stdc_store8.c: New file, based on
tests/test-stdc_store8_aligned.c.
* modules/stdc_store8-tests: New file.

stdc_store8: New module.

* lib/stdbit.in.h (_GL_STDC_STORE8_INLINE): New macro.
(stdc_store8_beu{8,16,32,64}, stdc_store8_leu{8,16,32,64},
stdc_store8_bes{8,16,32,64}, stdc_store8_les{8,16,32,64}): New
functions.
* lib/stdc_store8.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_STORE8.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_STORE8.
* modules/stdc_store8: New file.
* doc/posix-functions/stdc_store8_beu8.texi: Mention the new module.
* doc/posix-functions/stdc_store8_beu16.texi: Likewise.
* doc/posix-functions/stdc_store8_beu32.texi: Likewise.
* doc/posix-functions/stdc_store8_beu64.texi: Likewise.
* doc/posix-functions/stdc_store8_leu8.texi: Likewise.
* doc/posix-functions/stdc_store8_leu16.texi: Likewise.
* doc/posix-functions/stdc_store8_leu32.texi: Likewise.
* doc/posix-functions/stdc_store8_leu64.texi: Likewise.
* doc/posix-functions/stdc_store8_bes8.texi: Likewise.
* doc/posix-functions/stdc_store8_bes16.texi: Likewise.
* doc/posix-functions/stdc_store8_bes32.texi: Likewise.
* doc/posix-functions/stdc_store8_bes64.texi: Likewise.
* doc/posix-functions/stdc_store8_les8.texi: Likewise.
* doc/posix-functions/stdc_store8_les16.texi: Likewise.
* doc/posix-functions/stdc_store8_les32.texi: Likewise.
* doc/posix-functions/stdc_store8_les64.texi: Likewise.

stdc_store8_aligned: Add tests.

* tests/test-stdc_store8_aligned.c: New file.
* modules/stdc_store8_aligned-tests: New file.

stdc_store8_aligned: New module.

* lib/stdbit.in.h (_GL_STDC_STORE8_ALIGNED_INLINE): New macro.
(stdc_store8_aligned_beu{8,16,32,64},
stdc_store8_aligned_leu{8,16,32,64},
stdc_store8_aligned_bes{8,16,32,64},
stdc_store8_aligned_les{8,16,32,64}): New functions.
* lib/stdc_store8_aligned.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_STORE8_ALIGNED.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_STORE8_ALIGNED.
* modules/stdc_store8_aligned: New file.
* doc/posix-functions/stdc_store8_aligned_beu8.texi: Mention the new
module.
* doc/posix-functions/stdc_store8_aligned_beu16.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_beu32.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_beu64.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_leu8.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_leu16.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_leu32.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_leu64.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_bes8.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_bes16.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_bes32.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_bes64.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_les8.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_les16.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_les32.texi: Likewise.
* doc/posix-functions/stdc_store8_aligned_les64.texi: Likewise.

stdc_load8: Add tests.

* tests/test-stdc_load8.c: New file, based on
tests/test-stdc_load8_aligned.c.
* modules/stdc_load8-tests: New file.

stdc_load8: New module.

* lib/stdbit.in.h (_GL_STDC_LOAD8_INLINE): New macro.
(stdc_load8_beu{8,16,32,64}, stdc_load8_leu{8,16,32,64},
stdc_load8_bes{8,16,32,64}, stdc_load8_les{8,16,32,64}): New functions.
* lib/stdc_load8.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_LOAD8.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_LOAD8.
* modules/stdc_load8: New file.
* doc/posix-functions/stdc_load8_beu8.texi: Mention the new module.
* doc/posix-functions/stdc_load8_beu16.texi: Likewise.
* doc/posix-functions/stdc_load8_beu32.texi: Likewise.
* doc/posix-functions/stdc_load8_beu64.texi: Likewise.
* doc/posix-functions/stdc_load8_leu8.texi: Likewise.
* doc/posix-functions/stdc_load8_leu16.texi: Likewise.
* doc/posix-functions/stdc_load8_leu32.texi: Likewise.
* doc/posix-functions/stdc_load8_leu64.texi: Likewise.
* doc/posix-functions/stdc_load8_bes8.texi: Likewise.
* doc/posix-functions/stdc_load8_bes16.texi: Likewise.
* doc/posix-functions/stdc_load8_bes32.texi: Likewise.
* doc/posix-functions/stdc_load8_bes64.texi: Likewise.
* doc/posix-functions/stdc_load8_les8.texi: Likewise.
* doc/posix-functions/stdc_load8_les16.texi: Likewise.
* doc/posix-functions/stdc_load8_les32.texi: Likewise.
* doc/posix-functions/stdc_load8_les64.texi: Likewise.

stdc_load8_aligned: Add tests.

* tests/test-stdc_load8_aligned.c: New file.
* modules/stdc_load8_aligned-tests: New file.

stdc_load8_aligned: New module.

* lib/stdbit.in.h: Include <stdint.h>, <byteswap.h>.
(_GL_STDC_LOAD8_ALIGNED_INLINE): New macro.
(stdc_load8_aligned_beu{8,16,32,64}, stdc_load8_aligned_leu{8,16,32,64},
stdc_load8_aligned_bes{8,16,32,64}, stdc_load8_aligned_les{8,16,32,64}):
New functions.
* lib/stdc_load8_aligned.c: New file.
* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STDC_LOAD8_ALIGNED.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_STDC_LOAD8_ALIGNED.
* modules/stdc_load8_aligned: New file.
* doc/posix-functions/stdc_load8_aligned_beu8.texi: Mention the new
module.
* doc/posix-functions/stdc_load8_aligned_beu16.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_beu32.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_beu64.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_leu8.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_leu16.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_leu32.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_leu64.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_bes8.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_bes16.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_bes32.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_bes64.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_les8.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_les16.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_les32.texi: Likewise.
* doc/posix-functions/stdc_load8_aligned_les64.texi: Likewise.

doc: Document C2y stdc_* <stdbit.h> functions, part 2.

* doc/posix-functions/stdc_load8_aligned_bes8.texi: New file.
* doc/posix-functions/stdc_load8_aligned_bes16.texi: New file.
* doc/posix-functions/stdc_load8_aligned_bes32.texi: New file.
* doc/posix-functions/stdc_load8_aligned_bes64.texi: New file.
* doc/posix-functions/stdc_load8_aligned_beu8.texi: New file.
* doc/posix-functions/stdc_load8_aligned_beu16.texi: New file.
* doc/posix-functions/stdc_load8_aligned_beu32.texi: New file.
* doc/posix-functions/stdc_load8_aligned_beu64.texi: New file.
* doc/posix-functions/stdc_load8_bes8.texi: New file.
* doc/posix-functions/stdc_load8_bes16.texi: New file.
* doc/posix-functions/stdc_load8_bes32.texi: New file.
* doc/posix-functions/stdc_load8_bes64.texi: New file.
* doc/posix-functions/stdc_load8_beu8.texi: New file.
* doc/posix-functions/stdc_load8_beu16.texi: New file.
* doc/posix-functions/stdc_load8_beu32.texi: New file.
* doc/posix-functions/stdc_load8_beu64.texi: New file.
* doc/posix-functions/stdc_store8_aligned_bes8.texi: New file.
* doc/posix-functions/stdc_store8_aligned_bes16.texi: New file.
* doc/posix-functions/stdc_store8_aligned_bes32.texi: New file.
* doc/posix-functions/stdc_store8_aligned_bes64.texi: New file.
* doc/posix-functions/stdc_store8_aligned_beu8.texi: New file.
* doc/posix-functions/stdc_store8_aligned_beu16.texi: New file.
* doc/posix-functions/stdc_store8_aligned_beu32.texi: New file.
* doc/posix-functions/stdc_store8_aligned_beu64.texi: New file.
* doc/posix-functions/stdc_store8_bes8.texi: New file.
* doc/posix-functions/stdc_store8_bes16.texi: New file.
* doc/posix-functions/stdc_store8_bes32.texi: New file.
* doc/posix-functions/stdc_store8_bes64.texi: New file.
* doc/posix-functions/stdc_store8_beu8.texi: New file.
* doc/posix-functions/stdc_store8_beu16.texi: New file.
* doc/posix-functions/stdc_store8_beu32.texi: New file.
* doc/posix-functions/stdc_store8_beu64.texi: New file.
* doc/gnulib.texi (Functions in <stdbit.h>): Include these new files.
* doc/posix-functions/stdc_load8_aligned_les16.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_les32.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_les64.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_les8.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_leu16.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_leu32.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_leu64.texi: No module yet.
* doc/posix-functions/stdc_load8_aligned_leu8.texi: No module yet.
* doc/posix-functions/stdc_load8_les16.texi: No module yet.
* doc/posix-functions/stdc_load8_les32.texi: No module yet.
* doc/posix-functions/stdc_load8_les64.texi: No module yet.
* doc/posix-functions/stdc_load8_les8.texi: No module yet.
* doc/posix-functions/stdc_load8_leu16.texi: No module yet.
* doc/posix-functions/stdc_load8_leu32.texi: No module yet.
* doc/posix-functions/stdc_load8_leu64.texi: No module yet.
* doc/posix-functions/stdc_load8_leu8.texi: No module yet.
* doc/posix-functions/stdc_memreverse8.texi: No module yet.
* doc/posix-functions/stdc_memreverse8u16.texi: No module yet.
* doc/posix-functions/stdc_memreverse8u32.texi: No module yet.
* doc/posix-functions/stdc_memreverse8u64.texi: No module yet.
* doc/posix-functions/stdc_memreverse8u8.texi: No module yet.
* doc/posix-functions/stdc_rotate_left.texi: No module yet.
* doc/posix-functions/stdc_rotate_right.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_les16.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_les32.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_les64.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_les8.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_leu16.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_leu32.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_leu64.texi: No module yet.
* doc/posix-functions/stdc_store8_aligned_leu8.texi: No module yet.
* doc/posix-functions/stdc_store8_les16.texi: No module yet.
* doc/posix-functions/stdc_store8_les32.texi: No module yet.
* doc/posix-functions/stdc_store8_les64.texi: No module yet.
* doc/posix-functions/stdc_store8_les8.texi: No module yet.
* doc/posix-functions/stdc_store8_leu16.texi: No module yet.
* doc/posix-functions/stdc_store8_leu32.texi: No module yet.
* doc/posix-functions/stdc_store8_leu64.texi: No module yet.
* doc/posix-functions/stdc_store8_leu8.texi: No module yet.

stdbit-h: Finish handling multiple gnulib-tool invocations.

* lib/stdbit.in.h: Setup #include_next for the system stdbit.h. Don't
declare C23 functions if the system has stdbit.h.
* m4/stdbit_h.m4 (gl_STDBIT_H): Define HAVE_STDBIT_H. Check for
stdc_rotate_left_uc to see if the system header is missing C2y features.
* modules/stdbit-h (Depends-on): Add include_next.
(Makefile.am): Substitute @HAVE_STDBIT_H@ and some variables needed for

vaprintf: Add tests.

* tests/test-vaprintf.c: New file, based on tests/test-xvasprintf.c.
* modules/vaprintf-tests: New file.

vaprintf: New module.

* lib/stdio.in.h (_GL_ATTRIBUTE_DEALLOC_FREE): New macro, copied from
lib/string.in.h.
(free, rpl_free): Define as in lib/string.in.h.
(aprintf, vaprintf): New declarations.
* lib/vaprintf.c: New file, based on lib/xvasprintf.c.
* lib/aprintf.c: New file, based on lib/xasprintf.c.
* m4/stdio_h.m4 (gl_STDIO_H_REQUIRE_DEFAULTS): Initialize
GNULIB_VAPRINTF. Require gl_STDLIB_H_REQUIRE_DEFAULTS.
* modules/stdio-h (Depends-on): Add stdlib-h.
(Makefile.am): Substitute GNULIB_VAPRINTF, GNULIB_FREE_POSIX,
REPLACE_FREE.
* modules/vaprintf: New file.

xvasprintf-tests: Fix typo.

* tests/test-xvasprintf.c (test_xasprintf): Test xasprintf, not
my_xasprintf.

doc: Fix documentation that was added today.

* doc/posix-functions/stdc_*.texi: Reflect current state of gnulib.

c32tolower, c32toupper: Fix for Turkish locale in Cygwin 3.6.7.

* lib/c32to-impl.h (FUNC): Move _GL_SMALL_WCHAR_T case up.

doc: Document C2y stdc_* <stdbit.h> functions.

* doc/posix-functions/stdc_load8_aligned_les16.texi: New file.
* doc/posix-functions/stdc_load8_aligned_les32.texi: New file.
* doc/posix-functions/stdc_load8_aligned_les64.texi: New file.
* doc/posix-functions/stdc_load8_aligned_les8.texi: New file.
* doc/posix-functions/stdc_load8_aligned_leu16.texi: New file.
* doc/posix-functions/stdc_load8_aligned_leu32.texi: New file.
* doc/posix-functions/stdc_load8_aligned_leu64.texi: New file.
* doc/posix-functions/stdc_load8_aligned_leu8.texi: New file.
* doc/posix-functions/stdc_load8_les16.texi: New file.
* doc/posix-functions/stdc_load8_les32.texi: New file.
* doc/posix-functions/stdc_load8_les64.texi: New file.
* doc/posix-functions/stdc_load8_les8.texi: New file.
* doc/posix-functions/stdc_load8_leu16.texi: New file.
* doc/posix-functions/stdc_load8_leu32.texi: New file.
* doc/posix-functions/stdc_load8_leu64.texi: New file.
* doc/posix-functions/stdc_load8_leu8.texi: New file.
* doc/posix-functions/stdc_memreverse8.texi: New file.
* doc/posix-functions/stdc_memreverse8u16.texi: New file.
* doc/posix-functions/stdc_memreverse8u32.texi: New file.
* doc/posix-functions/stdc_memreverse8u64.texi: New file.
* doc/posix-functions/stdc_memreverse8u8.texi: New file.
* doc/posix-functions/stdc_rotate_left.texi: New file.
* doc/posix-functions/stdc_rotate_right.texi: New file.
* doc/posix-functions/stdc_store8_aligned_les16.texi: New file.
* doc/posix-functions/stdc_store8_aligned_les32.texi: New file.
* doc/posix-functions/stdc_store8_aligned_les64.texi: New file.
* doc/posix-functions/stdc_store8_aligned_les8.texi: New file.
* doc/posix-functions/stdc_store8_aligned_leu16.texi: New file.
* doc/posix-functions/stdc_store8_aligned_leu32.texi: New file.
* doc/posix-functions/stdc_store8_aligned_leu64.texi: New file.
* doc/posix-functions/stdc_store8_aligned_leu8.texi: New file.
* doc/posix-functions/stdc_store8_les16.texi: New file.
* doc/posix-functions/stdc_store8_les32.texi: New file.
* doc/posix-functions/stdc_store8_les64.texi: New file.
* doc/posix-functions/stdc_store8_les8.texi: New file.
* doc/posix-functions/stdc_store8_leu16.texi: New file.
* doc/posix-functions/stdc_store8_leu32.texi: New file.
* doc/posix-functions/stdc_store8_leu64.texi: New file.
* doc/posix-functions/stdc_store8_leu8.texi: New file.
* doc/gnulib.texi (Functions in <stdbit.h>): Change section title.
Include these new files.

parse-datetime: Fix typo.

* lib/parse-datetime.y: Fix typo.

stdbit-h: Fix generated header substitutions (regr. today).

* m4/stdbit_h.m4 (gl_STDBIT_H_REQUIRE_DEFAULTS): Adjust the variable
names with 's/_GL_/_/' as expected by the Makefile.am snippet.

acl-permissions: Don't stump on the system namespace.

* lib/acl.h (struct aclinfo): Rename field __gl_acl_ch to _gl_acl_ch.
* lib/file-has-acl.c (get_aclinfo, aclinfo_free, fdfile_has_aclinfo):
Update.

binary-io: Don't stump on the system namespace.

* lib/binary-io.h (_gl_set_fd_mode): Renamed from __gl_setmode.
* lib/binary-io.c (set_binary_mode): Update.

error-h: Don't stump on the system namespace.

* lib/error.in.h (_gl_error_call1): Renamed from __gl_error_call1.
(_gl_error_call): Renamed from __gl_error_call.

stdbit-h: Don't stump on the system namespace.

* lib/stdbit.in.h (_gl_stdbit_clz): Renamed from __gl_stdbit_clz.
(_gl_stdbit_clzl): Renamed from __gl_stdbit_clzl.
(_gl_stdbit_clzll): Renamed from __gl_stdbit_clzll.
(_gl_stdbit_ctz): Renamed from __gl_stdbit_ctz.
(_gl_stdbit_ctzl): Renamed from __gl_stdbit_ctzl.
(_gl_stdbit_ctzll): Renamed from __gl_stdbit_ctzll.
(_gl_stdbit_popcount): Renamed from __gl_stdbit_popcount.
(_gl_stdbit_popcountl): Renamed from __gl_stdbit_popcountl.
(_gl_stdbit_popcountll): Renamed from __gl_stdbit_popcountll.
(_gl_stdbit_popcount_wide): Renamed from __gl_stdbit_popcount_wide.
(_gl_stdbit_popcount_support): Renamed from
__gl_stdbit_popcount_support.
(_gl_stdbit_popcount_supported): Renamed from
_gl_stdbit_popcount_supported.
* lib/stdc_count_ones.c: Update.

stdbit-h: Use idioms for handling multiple gnulib-tool invocations.

* lib/stdbit.in.h: Use @GNULIB_...@ instead of @GL_...@.
* m4/stdbit_h.m4 (gl_STDBIT_H): Don't initialize GL_* variables.
(gl_STDBIT_MODULE_INDICATOR, gl_STDBIT_H_REQUIRE_DEFAULTS,
gl_STDBIT_H_DEFAULTS): New macros.
* modules/stdbit-h (Makefile.am): Substitute GNULIB_* instead of GL_*
variables.
* modules/stdc_bit_ceil (configure.ac): Use gl_STDBIT_MODULE_INDICATOR.
* modules/stdc_bit_floor (configure.ac): Likewise.
* modules/stdc_bit_width (configure.ac): Likewise.
* modules/stdc_count_ones (configure.ac): Likewise.
* modules/stdc_count_zeros (configure.ac): Likewise.
* modules/stdc_first_leading_one (configure.ac): Likewise.
* modules/stdc_first_leading_zero (configure.ac): Likewise.
* modules/stdc_first_trailing_one (configure.ac): Likewise.
* modules/stdc_first_trailing_zero (configure.ac): Likewise.
* modules/stdc_has_single_bit (configure.ac): Likewise.
* modules/stdc_leading_ones (configure.ac): Likewise.
* modules/stdc_leading_zeros (configure.ac): Likewise.
* modules/stdc_trailing_ones (configure.ac): Likewise.
* modules/stdc_trailing_zeros (configure.ac): Likewise.

gnulib-tool.py: Fix default handling for --local-{symlink,hardlink}.

* pygnulib/GLConfig.py (GLConfig.__init__): Allow lcopymode to remain
None.
(GLConfig.default): Change lcopymode's default to be None.
(GLConfig.checkLCopyMode): Update signature.
(GLConfig.resetLCopyMode): Change default value to None.
* pygnulib/GLFileSystem.py (GLFileSystem.shouldLink): Update.

gnulib-tool.py: Use --symlink or --hardlink for local modules.

Reported by Pádraig Brady in
<https://lists.gnu.org/r/coreutils/2026-03/msg00015.html>.

* pygnulib/GLConfig.py (__init__): If --local-symlink or
--local-hardlink are not specified, use the value specified by --symlink
or --hardlink for local modules instead of copying.

Don't use 'typeof' built-in with -std=c99 or -std=c11.

Reported by Alexander Sosedkin <asosedkin@redhat.com> in
<https://lists.gnu.org/archive/html/bug-gnulib/2026-03/msg00019.html>.

* lib/stdcountof.in.h (_gl_verify_is_array): Don't use the definition
with typeof in strict C99 or C11 modes.
* lib/string-desc.h (HAVE_TYPEOF): Don't define in strict C99 or C11
modes.

manywarnings: Eliminate some never-useful clang warnings.

* m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC(C)): Disable the
-Wgnu-include-next, -Wstring-plus-int, -Wstring-plus-char warnings.

Use countof, part 2.

Done through  sed -e 's/SIZEOF \([(][^()]*[)]\)/countof \1/g'

* lib/boot-time.c: Include <stdcountof.h>.
* lib/readutmp.c: Include <stdcountof.h>.
* lib/boot-time-aux.h (get_linux_boot_time_fallback,
get_openbsd_boot_time, get_windows_boot_time): Use countof.
* lib/duplocale.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(duplocale): Use countof instead.
* lib/fatal-signal.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(num_fatal_signals, actions_allocated): Use countof instead.
* lib/iconv_open.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(rpl_iconv_open): Use countof instead.
* lib/term-style-control.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(num_job_control_signals): Use countof instead.
* lib/uniconv/u16-conv-to-enc.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
* lib/uniconv/u32-conv-to-enc.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
* lib/uniconv/u-conv-to-enc.h (FUNC): Use countof instead.
* lib/uniconv/u16-strconv-to-enc.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
* lib/uniconv/u32-strconv-to-enc.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
* lib/uniconv/u-strconv-to-enc.h (FUNC): Use countof instead.
* lib/uniname/uniname.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(unicode_name_word, unicode_name_word_lookup, unicode_code_to_index,
unicode_index_to_code, unicode_character_name, unicode_name_character):
Use countof instead.
* lib/uniwidth/width.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(uc_width): Use countof instead.
* lib/wait-process.c: Include <stdcountof.h>.
(SIZEOF): Remove macro.
(slaves_allocated): Use countof instead.
* lib/gen-uni-tables.c (countof): Renamed from SIZEOF.
* modules/boot-time (Depends-on): Add stdcountof-h.
* modules/readutmp (Depends-on): Likewise.
* modules/duplocale (Depends-on): Likewise.
* modules/fatal-signal (Depends-on): Likewise.
* modules/iconv_open (Depends-on): Likewise.
* modules/term-style-control (Depends-on): Likewise.
* modules/uniconv/u16-conv-to-enc (Depends-on): Likewise.
* modules/uniconv/u32-conv-to-enc (Depends-on): Likewise.
* modules/uniconv/u16-strconv-to-enc (Depends-on): Likewise.
* modules/uniconv/u32-strconv-to-enc (Depends-on): Likewise.
* modules/uniname/uniname (Depends-on): Likewise.
* modules/uniwidth/width (Depends-on): Likewise.
* modules/wait-process (Depends-on): Likewise.
* tests/macros.h (SIZEOF): Remove macro.
* tests/**/*.[hc]: Use countof instead of SIZEOF. Include <stdcountof.h>
as needed.
* modules/**/*-tests (Depends-on): Add stdcountof-h if needed.

Use countof, part 1.

* lib/argmatch.h: Include <stdcountof.h>.
(ARRAY_CARDINALITY): Remove macro.
(ARGMATCH_VERIFY): Use countof instead.
* tests/test-argv-iter.c: Include <stdcountof.h>.
(ARRAY_CARDINALITY): Remove macro.
(main): Use countof instead.
* tests/test-hash.c: Include <stdcountof.h>.
(ARRAY_CARDINALITY): Remove macro.
(main): Use countof instead.
* tests/test-userspec.c: Include <stdcountof.h>.
(ARRAY_CARDINALITY): Remove macro.
(main): Use countof instead.
* modules/argmatch (Depends-on): Add stdcountof-h.
* modules/argv-iter-tests (Depends-on): Likewise.
* modules/hash-tests (Depends-on): Likewise.
* modules/userspec-tests (Depends-on): Likewise.

stdcountof-h: Improve comment.

* lib/stdcountof.in.h (countof): Improve comment.

Silence clang's -Wstring-plus-int warnings in Gnulib code.

* m4/gnulib-common.m4 (gl_CC_GNULIB_WARNINGS): Add -Wno-string-plus-int.

tests: Use streq, part 5.

* tests/test-execute-child.c: Revert last change.
* modules/execute-tests (Depends-on): Remove streq.

stdcountof-h tests: Avoid a clang warning.

* tests/test-stdcountof-h.c (call_count, do_call): Don't define in C++
mode.

float-h: Ensure ISO C23 compliance with clang 22.

* m4/float_h.m4 (gl_FLOAT_H): Test also whether the provided <float.h>
defines {FLT,DBL,LDBL}_IS_IEC_60559.

strftime: pacify clang -Wstring-plus-int

This pacifies a warning from default clang 21, and saves a byte.
Problem reported by Badli Al Rashid <https://bugs.gnu.org/80514>.
* lib/strftime.c (c_ampm_letters): New static constant, if
!defined _NL_CURRENT && (HAVE_ONLY_C_LOCALE || (USE_C_LOCALE &&
!HAVE_STRFTIME_L)).
(ampm): Use it if needed.

tests: Use strnul.

* tests/test-dfa-match-aux.c (main): Use strnul.
* tests/test-pthread-rwlock-waitqueue.c (reader_func, writer_func):
Likewise.
* tests/test-strtold.h (test_function): Likewise.
* tests/test-xstrtold.c (main): Likewise.
* modules/dfa-tests (Depends-on): Add strnul.
* modules/pthread-rwlock-extra-tests (Depends-on): Likewise.
* modules/c-strtold-tests (Depends-on): Likewise.
* modules/strtold-tests (Depends-on): Likewise.
* modules/xstrtold-tests (Depends-on): Likewise.

Fix last few ChangeLog entries.

tests: Use memeq, part 3.

* tests/**/*.[hc]: Use memeq instead of memcmp.
* modules/*-tests (Dependencies): Add memeq.

tests: Use memeq, part 2.

Done through
  sed -e 's/memcmp \([(][^()]*[)]\) != 0/!memeq \1/g' \
      -e 's/memcmp \([(][^()]*[(][^()]*[)][^()]*[)]\) != 0/!memeq \1/g'

* tests/**/*.[hc]: Use !memeq instead of memcmp ... != 0.
* modules/*-tests (Dependencies): Add memeq.

tests: Use memeq, part 1.

Done through
  sed -e 's/memcmp \([(][^()]*[)]\) == 0/memeq \1/g' \
      -e 's/memcmp \([(][^()]*[(][^()]*[)][^()]*[)]\) == 0/memeq \1/g'

* tests/**/*.[hc]: Use memeq instead of memcmp ... == 0.
* modules/*-tests (Dependencies): Add memeq.

tests: Use streq, part 4.

* tests/**/*.[hc]: Use streq instead of STREQ.
* tests/macros.h (STREQ): Remove macro.
* modules/*-tests (Dependencies): Add streq.

tests: Use streq, part 3.

* tests/**/*.[hc]: Use streq instead of strcmp.
* modules/*-tests (Dependencies): Add streq.

tests: Use streq, part 2.

Done through sed -e 's/strcmp \([(][^()]*[)]\) != 0/!streq \1/'

* tests/**/*.[hc]: Use !streq instead of strcmp ... != 0.
* modules/*-tests (Dependencies): Add streq.

tests: Use streq, part 1.

Done through sed -e 's/strcmp \([(][^()]*[)]\) == 0/streq \1/'

* tests/**/*.[hc]: Use streq instead of strcmp ... == 0.
* modules/*-tests (Dependencies): Add streq.

filesystem-remote: New module.

* lib/filesystem-remote.h: New file, based on lib/file-remote.h.
* lib/filesystem-remote.c: New file, based on lib/file-remote.c.
* lib/file-remote.h (is_remote_fs_type_name): Remove declaration.
* lib/file-remote.c (is_remote_fs_type_name): Remove function.
* modules/filesystem-remote: New file.
* lib/mountlist.c: Include filesystem-remote.h instead of file-remote.h.
* modules/mountlist (Depends-on): Add filesystem-remote. Remove
file-remote.

cygpath: Use _GL_ATTRIBUTE_MALLOC and _GL_ATTRIBUTE_DEALLOC_FREE.

* lib/cygpath.h: Include stdlib.h for free declaration.
(cygpath_w): Mark function with _GL_ATTRIBUTE_MALLOC and
_GL_ATTRIBUTE_DEALLOC_FREE since it will always return a malloc'ed
pointer or NULL.

file-remote: Use streq.

* lib/file-remote.c (is_remote_fs_type_name, file_is_remote): Use streq
instead of strcmp.
* modules/file-remote (Depends-on): Add streq.

Straighten dependencies to streq or memeq.

* modules/argmatch (Dependencies): Add memeq, streq. Remove stringeq.
* modules/bcp47 (Dependencies): Likewise.
* modules/readutmp (Dependencies): Likewise.
* modules/relocatable-prog (Dependencies): Likewise.
* modules/relocatable-prog-wrapper (Dependencies): Likewise.
* modules/vc-mtime (Dependencies): Likewise.
* modules/backup-rename (Dependencies): Add memeq. Remove stringeq.
* modules/backupfile (Dependencies): Likewise.
* modules/boot-time (Dependencies): Likewise.
* modules/csharpcomp (Dependencies): Likewise.
* modules/csharpexec (Dependencies): Likewise.
* modules/file-has-acl (Dependencies): Likewise.
* modules/get_ppid_of (Dependencies): Likewise.
* modules/get_progname_of (Dependencies): Likewise.
* modules/getlogin_r (Dependencies): Likewise.
* modules/getprogname (Dependencies): Likewise.
* modules/getumask (Dependencies): Likewise.
* modules/isnan-no-c++ (Dependencies): Likewise.
* modules/isnanf (Dependencies): Likewise.
* modules/isnanf-nolibm (Dependencies): Likewise.
* modules/isnand (Dependencies): Likewise.
* modules/isnand-nolibm (Dependencies): Likewise.
* modules/isnanl (Dependencies): Likewise.
* modules/isnanl-nolibm (Dependencies): Likewise.
* modules/mbchar (Dependencies): Likewise.
* modules/mem-hash-map (Dependencies): Likewise.
* modules/memcoll (Dependencies): Likewise.
* modules/progname (Dependencies): Likewise.
* modules/pthread_sigmask (Dependencies): Likewise.
* modules/quotearg (Dependencies): Likewise.
* modules/same (Dependencies): Likewise.
* modules/signbit-no-c++ (Dependencies): Likewise.
* modules/string-desc (Dependencies): Likewise.
* modules/uniname/uniname (Dependencies): Likewise.
* modules/acl-permissions (Dependencies): Add streq. Remove stringeq.
* modules/argp (Dependencies): Likewise.
* modules/c-vasnprintf (Dependencies): Likewise.
* modules/c32_get_mapping (Dependencies): Likewise.
* modules/c32_get_type_test (Dependencies): Likewise.
* modules/concat-filename (Dependencies): Likewise.
* modules/cpu-supports (Dependencies): Likewise.
* modules/dfa (Dependencies): Likewise.
* modules/duplocale (Dependencies): Likewise.
* modules/exclude (Dependencies): Likewise.
* modules/findprog (Dependencies): Likewise.
* modules/findprog-in (Dependencies): Likewise.
* modules/findprog-lgpl (Dependencies): Likewise.
* modules/fopen (Dependencies): Likewise.
* modules/fopen-gnu (Dependencies): Likewise.
* modules/freopen (Dependencies): Likewise.
* modules/fts (Dependencies): Likewise.
* modules/getlocalename_l-simple (Dependencies): Likewise.
* modules/getlocalename_l-unsafe (Dependencies): Likewise.
* modules/getlogin (Dependencies): Likewise.
* modules/getugroups (Dependencies): Likewise.
* modules/hard-locale (Dependencies): Likewise.
* modules/hashcode-named-file (Dependencies): Likewise.
* modules/hashkey-string (Dependencies): Likewise.
* modules/iconv_open (Dependencies): Likewise.
* modules/idcache (Dependencies): Likewise.
* modules/localcharset (Dependencies): Likewise.
* modules/localename (Dependencies): Likewise.
* modules/localename-environ (Dependencies): Likewise.
* modules/localename-unsafe (Dependencies): Likewise.
* modules/localename-unsafe-limited (Dependencies): Likewise.
* modules/map-c++-tests (Dependencies): Likewise.
* modules/mbs_endswith (Dependencies): Likewise.
* modules/mountlist (Dependencies): Likewise.
* modules/newlocale (Dependencies): Likewise.
* modules/nl_langinfo (Dependencies): Likewise.
* modules/nproc (Dependencies): Likewise.
* modules/open (Dependencies): Likewise.
* modules/parse-datetime (Dependencies): Likewise.
* modules/popen (Dependencies): Likewise.
* modules/posix_spawn-internal (Dependencies): Likewise.
* modules/propername (Dependencies): Likewise.
* modules/pt_chown (Dependencies): Likewise.
* modules/putenv-gnu (Dependencies): Likewise.
* modules/qcopy-acl (Dependencies): Likewise.
* modules/rpmatch (Dependencies): Likewise.
* modules/selinux-h (Dependencies): Likewise.
* modules/setlocale (Dependencies): Likewise.
* modules/setlocale-fixes (Dependencies): Likewise.
* modules/sig2str (Dependencies): Likewise.
* modules/spawn-pipe (Dependencies): Likewise.
* modules/stat (Dependencies): Likewise.
* modules/str_endswith (Dependencies): Likewise.
* modules/streq-opt (Dependencies): Likewise.
* modules/striconveha (Dependencies): Likewise.
* modules/supersede (Dependencies): Likewise.
* modules/time_rz (Dependencies): Likewise.
* modules/unicodeio (Dependencies): Likewise.
* modules/unistdio/u16-u16-vasnprintf (Dependencies): Likewise.
* modules/unistdio/u16-vasnprintf (Dependencies): Likewise.
* modules/unistdio/u32-u32-vasnprintf (Dependencies): Likewise.
* modules/unistdio/u32-vasnprintf (Dependencies): Likewise.
* modules/unistdio/u8-u8-vasnprintf (Dependencies): Likewise.
* modules/unistdio/u8-vasnprintf (Dependencies): Likewise.
* modules/unistdio/ulc-vasnprintf (Dependencies): Likewise.
* modules/vasnprintf (Dependencies): Likewise.
* modules/vasnwprintf (Dependencies): Likewise.
* modules/wctrans (Dependencies): Likewise.
* modules/wctype (Dependencies): Likewise.
* modules/c-nstrftime (Dependencies): Add streq.
* modules/fprintftime (Dependencies): Likewise.
* modules/nstrftime (Dependencies): Likewise.
* modules/nstrftime-limited (Dependencies): Likewise.

streq, memeq: New modules.

* lib/string.in.h (_GL_STRING_INLINE): Remove macro.
(_GL_MEMEQ_INLINE): New macro.
(memeq): Use it instead of _GL_STRING_INLINE. Test GNULIB_MEMEQ.
(_GL_STREQ_INLINE): New macro.
(streq): Use it instead of _GL_STRING_INLINE. Test GNULIB_STREQ.
* lib/memeq.c: New file.
* lib/streq.c: New file.
* lib/string.c: Remove file.
* m4/memeq.m4: New file, based on m4/stringeq.m4.
* m4/streq.m4: New file, based on m4/stringeq.m4.
* m4/stringeq.m4: Remove file.
* m4/string_h.m4 (gl_STRING_H_REQUIRE_DEFAULTS): Initialize
GNULIB_MEMEQ, GNULIB_STREQ. Don't initialize GNULIB_STRINGEQ.
* modules/string-h (Makefile.am): Substitute GNULIB_MEMEQ, GNULIB_STREQ.
Don't substitute GNULIB_STRINGEQ.
* modules/memeq: New file.
* modules/streq: New file.
* modules/stringeq: Change to just be the union of streq and memeq.
* MODULES.html.sh (func_all_modules): Add memeq, streq.

Fix module dependencies after 2025-09-17 "stringeq: prefer streq to strcmp in other modules".

* modules/c-vasnprintf (Dependencies): Add stringeq.
* modules/findprog-lgpl (Dependendies): Likewise.
* modules/localename-environ (Dependendies): Likewise.
* modules/localename-unsafe-limited (Dependendies): Likewise.
* modules/uchar-h-c23 (Dependendies): Likewise.
* modules/unistdio/u16-u16-vasnprintf (Dependendies): Likewise.
* modules/unistdio/u16-vasnprintf (Dependendies): Likewise.
* modules/unistdio/u32-u32-vasnprintf (Dependendies): Likewise.
* modules/unistdio/u32-vasnprintf (Dependendies): Likewise.
* modules/unistdio/u8-u8-vasnprintf (Dependendies): Likewise.
* modules/unistdio/u8-vasnprintf (Dependendies): Likewise.
* modules/unistdio/ulc-vasnprintf (Dependendies): Likewise.
* modules/vasnprintf (Dependendies): Likewise.
* modules/vasnwprintf (Dependendies): Likewise.
* modules/setenv (Dependendies): Remove stringeq.
* modules/uchar-h (Dependendies): Likewise.
* modules/uniconv/base (Dependendies): Likewise.

Fix module dependencies after 2025-09-17 "stringeq: prefer memeq to memcmp in other modules".

* modules/backup-rename (Dependencies): Add stringeq.
* modules/isnanf (Dependendies): Likewise.
* modules/isnanf-nolibm (Dependendies): Likewise.
* modules/isnand (Dependendies): Likewise.
* modules/isnand-nolibm (Dependendies): Likewise.
* modules/isnanl (Dependendies): Likewise.
* modules/isnanl-nolibm (Dependendies): Likewise.

mountlist: use file-remote module to determine remoteness

* lib/file-remote.c (is_remote_fs_type_name): A new function
that matches file system _names_ as being remote.  The list is
an amalgamation of those names already referenced in file-remote,
names referenced in ME_REMOTE, and IDs referenced in file-remote.
* lib/file-remote.h: Declare new function.
* lib/mountlist.c (ME_REMOTE): Use is_remote_fs_type_name()
to determine if the name is remote.
* modules/mountlist: Depend on file-remote.

strnul: Fix link-time error.

* lib/string.in.h (_GL_STRNUL_INLINE): New macro.
(gl_strnul): Use it instead of _GL_STRING_INLINE.
* lib/strnul.c: New file.
* lib/string.c: Update comment.
* modules/strnul (Files): Add strnul.c. Remove string.c.
(Makefile.am): Update accordingly.

wctype-h: Try to fix error regarding mbstate_t on very old mingw.

Reported by Eli Zaretskii, see
<https://lists.gnu.org/archive/html/bug-gnulib/2026-01/msg00206.html>.
Based on proposed patch at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00043.html>.

* lib/wctype.in.h: Don't include <wchar.h> on mingw when it has already
been at least partially processed.

mbs_startswith: Add tests.

* tests/test-mbs_startswith1.c: New file, based on
tests/test-mbs_endswith1.c.
* tests/test-mbs_startswith2.c: New file, based on
tests/test-mbs_endswith2.c.
* tests/test-mbs_startswith2.sh: New file, based on
tests/test-mbs_endswith2.sh.
* tests/test-mbs_startswith3.c: New file, based on
tests/test-mbs_endswith3.c.
* tests/test-mbs_startswith3.sh: New file, based on
tests/test-mbs_endswith3.sh.
* modules/mbs_startswith-tests: New file.

mbs_startswith: Fix handling of incomplete characters.

* lib/string.in.h (mbs_startswith): Remove macro definition.
* lib/mbs_startswith.c: New file.
* modules/mbs_startswith (Files): Add it.
(Depends-on): Add strnlen, mbiter.
(Makefile.am): Arrange to compile mbs_startswith.c.

assert: document variadic variant

crypto/sha3: Silence -Wzero-as-null-pointer-constant warning.

* lib/sha3.c (sha3_read_ctx): Use NULL for the pointer argument.

Use strnul in a few places.

* lib/argz.c (argz_next): Use strnul.
* lib/cpu-supports.c (hwcap_allowed): Likewise.
* lib/file-has-acl.c (aclinfo_has_xattr): Likewise.
* lib/inet_ntop.c (inet_ntop6): Likewise.
* lib/link.c (link): Likewise.
* lib/localename-unsafe.c (enum_locales_fn): Likewise.
* lib/mbspcasecmp.c (mbspcasecmp): Likewise.
* lib/opendir.c (opendir): Likewise.
* lib/parse-duration.c (parse_year_month_day, parse_hour_minute_second,
trim): Likewise.
* lib/setlocale.c (setlocale_unixlike): Likewise.
* lib/strftime.c (__strftime_internal): Likewise.
* lib/striconv.c (str_cd_iconv): Likewise.
* lib/strncat.c (strncat): Likewise.
* lib/term-style-control.c (log_signal_handler_called,
tcsetattr_failed): Likewise.
* lib/time_rz.c (save_abbr): Likewise.
* lib/vc-mtime.c (git_mtime, max_vc_mtime): Likewise.
* tests/test-savedir.c (test_savedir_sort_none, test_savedir_sort_name):
Likewise.
* modules/argz (Depends-on): Add strnul.
* modules/cpu-supports (Depends-on): Likewise.
* modules/file-has-acl (Depends-on): Likewise.
* modules/inet_ntop (Depends-on): Likewise.
* modules/link (Depends-on): Likewise.
* modules/localename-unsafe (Depends-on): Likewise.
* modules/localename-unsafe-limited (Depends-on): Likewise.
* modules/mbspcasecmp (Depends-on): Likewise.
* modules/opendir (Depends-on): Likewise.
* modules/parse-duration (Depends-on): Likewise.
* modules/setlocale (Depends-on): Likewise.
* modules/nstrftime (Depends-on): Likewise.
* modules/nstrftime-limited (Depends-on): Likewise.
* modules/c-nstrftime (Depends-on): Likewise.
* modules/fprintftime (Depends-on): Likewise.
* modules/striconv (Depends-on): Likewise.
* modules/strncat (Depends-on): Likewise.
* modules/term-style-control (Depends-on): Likewise.
* modules/time_rz (Depends-on): Likewise.
* modules/vc-mtime (Depends-on): Likewise.
* modules/savedir-tests (Depends-on): Likewise.

Copyright-paperwork-exempt: Yes

strnul: Respect GNULIB_NAMESPACE.

* lib/string.in.h (strnul): Use _GL_BEGIN_NAMESPACE, _GL_END_NAMESPACE.
* tests/test-strnul-c++2.cc: New file, based on tests/test-strnul.c.
* modules/strnul-c++-tests (Files): Add it.
(Makefile.am): Arrange to compile and run test-strnul-c++2.

strnul: Accept 'void *' and 'const void *' arguments in C mode.

Reported by Paul Eggert in
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00170.html>.

* lib/string.in.h (strnul): Use a conditional expression in _Generic.
* tests/test-strnul.c (main): Add test cases with 'void *' argument.

fts: Relicense some of its source code under LGPLv2+.

Jim Meyering's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00109.html>.
Paul Eggert's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00106.html>.
Bruno Haible's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00111.html>.
Pádraig Brady's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00113.html>.
Kamil Dudka's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00199.html>.

* lib/fts.in.h: Change license notice to LGPLv2+.
* lib/fts.c: Likewise.
* lib/fts-cycle.c: Likewise.

Fix comment misspelling of "against"

crypto: don’t add 72 to malloc size

The ‘BLOCKSIZE + 72’ business apparently dates back to 30 years
ago when the buffer was local (not heap allocated) and was multi-use.
That code died long ago, so stop allocating the cargo-cult bytes.
* lib/md2-stream.c (md2_stream):
* lib/md4-stream.c (md4_stream):
* lib/md5-stream.c (md5_stream):
* lib/sha1-stream.c (sha1_stream):
* lib/sha256-stream.c (shaxxx_stream):
* lib/sha3-stream.c (sha3_xxx_stream):
* lib/sha512-stream.c (shaxxx_stream):
* lib/sm3-stream.c (sm3_stream):
Don’t allocate an unnecessary 72 extra bytes.

sha3: add a few ‘restrict’s that I forgot

* lib/sha3-stream.c (sha3_xxx_stream):
* lib/sha3.c (sha3_##SIZE##_buffer):
Add some more ‘restrict’s.

crypto: add ‘restrict’ to .h files

Use ‘restrict’ on pointer args when appropriate.
It suffices to do this in .h files, as .c files inherit it.
For style, prefer qualifiers after types, to be consistent with
putting ‘restrict’ after types.
* lib/af_alg.h (afalg_buffer, afalg_stream):
* lib/arcfour.h (arcfour_stream, arcfour_setkey):
* lib/arctwo.h (arctwo_setkey_ekb, arctwo_encrypt, arctwo_decrypt):
* lib/des.h (gl_des_setkey, gl_des_makekey, gl_des_ecb_crypt)
(gl_3des_set2keys, gl_3des_set3keys, gl_3des_makekey)
(gl_3des_ecb_crypt):
* lib/gc.h (gc_cipher_setkey, gc_cipher_setiv)
(gc_cipher_encrypt_inline, gc_cipher_decrypt_inline, gc_hash_clone)
(gc_hash_hmac_setkey, gc_hash_write, gc_hash_buffer, gc_md2)
(gc_md4, gc_md5, gc_sha1, gc_sha256, gc_sha512, gc_sm3)
(gc_hmac_md5, gc_hmac_sha1, gc_hmac_sha256, gc_hmac_sha512)
(gc_pbkdf2_hmac, gc_pbkdf2_sha1):
* lib/gl_openssl.h (GL_CRYPTO_FN (_process_bytes))
(GL_CRYPTO_FN (_process_block), GL_CRYPTO_FN (_finish_ctx))
(GL_CRYPTO_FN (_buffer), GL_CRYPTO_FN (_read_ctx)):
* lib/hmac.h (hmac_md5, hmac_sha1, hmac_sha256, hmac_sha512):
* lib/md2.h (md2_process_block, md2_process_bytes, md2_finish_ctx)
(md2_read_ctx, md2_buffer, md2_stream):
* lib/md4.h (md4_process_block, md4_process_bytes, md4_finish_ctx)
(md4_read_ctx, md4_buffer, md4_stream):
* lib/md5.h (__md5_process_block, __md5_process_bytes, __md5_finish_ctx)
(__md5_read_ctx, __md5_buffer, __md5_stream):
* lib/rijndael-alg-fst.h (rijndaelKeySetupEnc)
(rijndaelKeySetupDec, rijndaelEncrypt, rijndaelDecrypt):
* lib/rijndael-api-fst.h (rijndaelMakeKey, rijndaelCipherInit)
(rijndaelBlockEncrypt, rijndaelPadEncrypt, rijndaelBlockDecrypt)
(rijndaelPadDecrypt):
* lib/sha1.h (sha1_process_block, sha1_process_bytes)
(sha1_finish_ctx, sha1_read_ctx, sha1_buffer, sha1_stream):
* lib/sha256.h (sha256_process_block, sha256_process_bytes)
(sha256_finish_ctx, sha224_finish_ctx, sha256_read_ctx)
(sha224_read_ctx, sha256_buffer, sha224_buffer, sha256_stream)
(sha224_stream):
* lib/sha3.h (sha3_process_block, sha3_process_bytes)
(sha3_finish_ctx, sha3_read_ctx, sha3_224_buffer, sha3_256_buffer)
(sha3_384_buffer, sha3_512_buffer, sha3_224_stream)
(sha3_256_stream, sha3_384_stream, sha3_512_stream):
* lib/sha512.h (sha512_process_block, sha512_process_bytes)
(sha512_finish_ctx, sha384_finish_ctx, sha512_read_ctx)
(sha384_read_ctx, sha512_buffer, sha384_buffer, sha512_stream)
(sha384_stream):
* lib/sm3.h (sm3_process_block, sm3_process_bytes, sm3_finish_ctx)
(sm3_read_ctx, sm3_buffer, sm3_stream):
Add ‘restrict’ to pointer args.  All implementations changed.

crypto/sha3: Don’t leak if init fails and no free

If the init_ctx functions fail, it’s natural for callers to
immediately fail too.  Change the init_ctx functions to not leak
when failing.  This doesn’t invalidate any callers that free
if the init functions fail, as that free now becomes a no-op.
* lib/sha3.c (sha3_##SIZE##_init_ctx): Before failing,
free any storage that was allocated before failure was discovered.
* tests/test-sha3-224-buffer.c:
* tests/test-sha3-256-buffer.c:
* tests/test-sha3-384-buffer.c:
* tests/test-sha3-512-buffer.c:
(check, main): Test more cases of multiple frees.
Also, fix a memory leak.

crypto/sha3: fix sha3_read_ctx reset bug

* lib/sha3.c (sha3_read_ctx): When using OpenSSL, don’t update the
internal context; we’re supposed to read it, not write it.
Instead, clone it and update the clone.
* tests/test-sha3-224-buffer.c:
* tests/test-sha3-256-buffer.c:
* tests/test-sha3-384-buffer.c:
* tests/test-sha3-512-buffer.c:
(check): Test for the bug.

crypto/sha3: EVP_MD_CTX_create → EVP_MD_CTX_new

* lib/sha3.c (sha3_##SIZE##_init_ctx): Avoid deprecated macro name.

crypto/sha3: fix errno when freeing

* lib/sha3.c (sha3_free_ctx): Preserve errno.
* modules/crypto/sha3 (Depends-on):
* modules/crypto/sha3-buffer (Depends-on):
Depend on free-posix.

crypto/sha3: fix memory leak with OpenSSL wrapper

* lib/sha3.c (sha3_##SIZE##_buffer):
Free ctx before returning.

* lib/sha3.c (sha3_process_bytes): Simplify, and replace * with -.

crypto/sha3: simplify full-block processing

* lib/sha3.c (sha3_process_bytes): Simplify.

crypto/sha3: fix partial-buffer bug

* lib/sha3.c (sha3_process_bytes):
Update ctx->buflen to 0 if all bytes were processed.
* tests/test-sha3-224-buffer.c:
* tests/test-sha3-256-buffer.c:
* tests/test-sha3-384-buffer.c:
* tests/test-sha3-512-buffer.c:
(mismatch): New function.
(check): Check for the bug.

strnul-bench-tests: New module.

* tests/bench-strnul.c: New file.
* modules/strnul-bench-tests: New file.

cdefs: omit ungrammatical (and unnecessary) #error

* lib/cdefs.h: Remove an ungrammatical #error diagnostic
that is not needed any more, now that people no longer
try to use glibc or Gnulib with K&R C compilers.

cdefs: merge from glibc

Also, minimize whitespace differences from glibc,
to simplify comparison.
* lib/cdefs.h: Do not issue header warning if C++.
(__COLD, __attribute_overloadable__, __REDIRECT_FORTIFY)
(__REDIRECT_FORTIFY_NTH, __glibc_const_generic)
(__attribute_struct_may_alias__): New macros.
Several other new macros are defined if !__GNULIB_CDEFS.
(__glibc_safe_or_unknown_len): Check that __osz is a constant.
(__REDIRECT_LDBL): Optimize error redirects for ieeelongdouble.
(__fortified_attr_access): Drop access attribute for _FORTIFY_SOURCE=3.

strnul: Add tests.

* tests/test-strnul.c: New file.
* tests/test-strnul-c++.cc: New file.
* modules/strnul-tests: New file.
* modules/strnul-c++-tests: New file.

strnul: New module.

Suggested by Alejandro Colomar <alx@kernel.org> in
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00121.html>.

* lib/string.in.h (gl_strnul): New function.
(strnul): New macro or template.
* lib/string.c: Update comment.
* m4/string_h.m4 (gl_STRING_H_REQUIRE_DEFAULTS): Initialize
GNULIB_STRNUL.
* modules/string-h (Makefile.am): Substitute GNULIB_STRNUL.
* modules/strnul: New file.

streq: Rename to streq-opt.

* lib/streq-opt.h: Renamed from lib/streq.h.
* modules/streq-opt: Renamed from modules/streq.
* NEWS: Mention the change.
* lib/c32is-impl.h: Include streq-opt.h instead of streq.h.
* lib/c32to-impl.h: Likewise.
* lib/c32rtomb.c: Likewise.
* lib/c32width.c: Likewise.
* lib/lc-charset-dispatch.c: Likewise.
* lib/lc-charset-unicode.c: Likewise.
* lib/mbrtoc32.c: Likewise.
* lib/uniwidth/cjk.h: Likewise.
* lib/wcwidth.c: Likewise.
* modules/c32is* (Depends-on): Add streq-opt. Remove streq.
* modules/c32to* (Depends-on): Likewise.
* modules/c32rtomb (Depends-on): Likewise.
* modules/mbrtoc32 (Depends-on): Likewise.
* modules/mbrtowc (Depends-on): Likewise.
* modules/uchar-h-c23 (Depends-on): Likewise.
* modules/unilbrk/u*-possible-linebreaks (Depends-on): Likewise.
* modules/uniwidth/width (Depends-on): Likewise.
* modules/wcwidth (Depends-on): Likewise.
* MODULES.html.sh: Update.

csharpcomp: Use str_endswith.

Suggested by Paul Eggert in
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00129.html>.

* lib/csharpcomp.c (compile_csharp_using_mono,
compile_csharp_using_dotnet, compile_csharp_using_sscli,
compile_csharp_class): Use str_endswith.
* modules/csharpcomp (Depends-on): Add str_endswith.

Say B5000 and U1103 don’t do C23

Mention CheriBSD as tested

doc: fix ChangeLog and mention xlc versions

i-ring: Relicense under LGPLv2+.

* modules/i-ring (License): Change to LGPLv2+.
* lib/i-ring.h: Update license notice.
* lib/i-ring.c: Likewise.

cycle-check: Relicense under LGPLv2+.

Jim Meyering's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00109.html>.
Paul Eggert's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00106.html>.

* modules/cycle-check (License): Change to LGPLv2+.
* lib/cycle-check.h: Update license notice.
* lib/cycle-check.c: Likewise.

dev-ino: Relicense under LGPLv2+.

Jim Meyering's permission is at
<https://lists.gnu.org/archive/html/bug-gnulib/2026-02/msg00109.html>.

* modules/dev-ino (License): Change to LGPLv2+.
* lib/dev-ino.h: Update license notice.

cpu-supports: Fix typos.

* lib/cpu-supports.h (gcc_feature_to_glibc_hwcap): Fix typos in
comments.

cpu-supports: Add detection for Advanced SIMD (Neon) instructions.

* lib/cpu-supports.h (gcc_feature_to_glibc_hwcap): Map "asimd" to
"-ASIMD". Add a comment on where to find aarch64 hwcaps in glibc.