Bruno Haible [Sun, 16 Aug 2020 16:59:14 +0000 (18:59 +0200)]
Use _Static_assert and static_assert primitives when present on clang.
* lib/cdefs.h (_Static_assert): Don't define as a macro on clang.
* lib/verify.h (_GL_HAVE__STATIC_ASSERT, _GL_HAVE__STATIC_ASSERT1,
_GL_HAVE_STATIC_ASSERT1): Define as appropriate on clang.
Bruno Haible [Sun, 16 Aug 2020 16:44:53 +0000 (18:44 +0200)]
Use __restrict also on clang.
* lib/argp.h (__restrict): Don't define as a macro on clang >= 3.
* lib/glob.in.h (_Restrict_): Use __restrict on clang >= 3.
* lib/unitypes.in.h (_UC_RESTRICT): Likewise.
Bruno Haible [Sun, 16 Aug 2020 10:53:57 +0000 (12:53 +0200)]
C++ tests: Fix link errors on MSVC (regression from 2020-05-31).
* modules/stdio-c++-tests (Makefile.am): Link test-stdio-c++ with
$(LIB_GETRANDOM), needed for the rpl_tmpfile symbol.
* modules/stdlib-c++-tests (Makefile.am): Link test-stdlib-c++ with
$(LIB_GETRANDOM), needed for the mkdtemp and mkstemp symbols.
Paul Eggert [Sat, 15 Aug 2020 23:05:35 +0000 (16:05 -0700)]
nstrftime: be more predictable about errno
This aligns nstrftime better with draft POSIX 202x strftime.
* lib/nstrftime.c: Include errno.h.
(width_add, __strftime_internal): Set errno on failure,
and preserve it on success. Check for mktime_z failure.
* modules/nstrftime (Depends-on): Add errno.
* modules/nstrftime-tests (Depends-on): Add atoll, intprops.
* tests/test-nstrftime.c: Include intprops.h, limits.h.
(errno_test): New test function.
(main): Call it.
Bruno Haible [Sat, 15 Aug 2020 00:15:26 +0000 (02:15 +0200)]
stdnoreturn: Work around problem with MSVC/clang.
* m4/stdnoreturn.m4 (gl_STDNORETURN_H): On native Windows, include some
system header after <stdnoreturn.h>.
* doc/posix-headers/stdnoreturn.texi: Mention the issue.
Bruno Haible [Fri, 14 Aug 2020 18:03:33 +0000 (20:03 +0200)]
nstrftime: Assume tzset exists.
* lib/nstrftime.c (HAVE_TZSET): Remove macro.
(__strftime_internal): Test my_strftime, not HAVE_TZSET.
* m4/nstrftime.m4 (gl_FUNC_GNU_STRFTIME): Don't test for tzset.
Paul Eggert [Wed, 12 Aug 2020 18:27:48 +0000 (11:27 -0700)]
stdint: port intptr_t to more-recent MinGW
Problem reported by Eli Zaretskii in <https://bugs.gnu.org/36597#106>.
* lib/stdint.in.h (intptr_t, uintptr_t): Do not define on MinGW,
even if _INTPTR_T_DEFINED and _UINTPTR_T_DEFINED are not defined.
Apparently those two macros were removed in mingwrt-3.22
dated 2016-07-14.
Bruno Haible [Wed, 12 Aug 2020 00:24:04 +0000 (02:24 +0200)]
Use __restrict also on clang.
* lib/cdefs.h (__restrict): Don't define as a macro on clang.
(__restrict_arr): On clang, define like on GCC.
* lib/regex.h (_Restrict_): Use '__restrict' also on clang.
(_Restrict_arr_): Use _Restrict_ also on clang.
* lib/spawn.in.h (_Restrict_): Use '__restrict' also on clang.
(_Restrict_arr_): Use _Restrict_ also on clang.
Bruno Haible [Mon, 10 Aug 2020 23:53:13 +0000 (01:53 +0200)]
Use many __attribute__s with clang.
* m4/gnulib-common.m4 (_Noreturn): Use __attribute__ __noreturn__ also
on clang.
* lib/cdefs.h (__glibc_clang_has_attribute, __glibc_clang_has_builtin):
New macros.
(__THROW, __THROWNL, __NTH, __NTHNL): Use __attribute__ __nothrow__ also
on clang.
(__warndecl, __warnattr, __errordecl): Use __attribute__ __diagnose_if__
also on older clang versions.
(__attribute__): Don't define to empty on clang.
(__attribute_malloc__): Use __attribute__ __malloc__ also on clang.
(__attribute_pure__): Use __attribute__ __pure__ also on clang.
(__attribute_const__): Use __attribute__ __const__ also on clang.
(__attribute_used__): Use __attribute__ __used__ also on clang.
(__attribute_noinline__): Use __attribute__ __noinline__ also on clang.
(__attribute_deprecated__): Use __attribute__ __deprecated__ also on
clang.
(__attribute_format_arg__): Use __attribute__ __format_arg__ also on
clang.
(__attribute_format_strfmon__): Use __attribute__ __format__ __strfmon__
also on clang.
(__nonnull): Use __attribute__ __nonnull__ also on clang.
(__attribute_warn_unused_result__): Use __attribute__
__warn_unused_result__ also on clang.
(__always_inline): Use __attribute__ __always_inline__ also on clang.
(__attribute_artificial__): Use __attribute__ __artificial__ also on
clang >= 7.
(__glibc_unlikely, __glibc_likely): Use __builtin_expect also on older
clang versions.
(_Noreturn): Don't redefine on clang >= 3.5.
* lib/arg-nonnull.h (_GL_ARG_NONNULL): Use __attribute__ __nonnull__
also on clang.
* lib/dirent.in.h (_GL_ATTRIBUTE_PURE): Use __attribute__ __pure__ also
on clang.
* lib/stdlib.in.h (_GL_ATTRIBUTE_PURE): Likewise.
* lib/string.in.h (_GL_ATTRIBUTE_PURE): Likewise.
* lib/wchar.in.h (_GL_ATTRIBUTE_PURE): Likewise.
* lib/stdio.in.h (_GL_ATTRIBUTE_FORMAT): Use __attribute__ __format__
also on clang.
* lib/monetary.in.h (_GL_ATTRIBUTE_FORMAT): Likewise.
* lib/textstyle.in.h (ostream_printf, ostream_vprintf): Likewise.
* lib/unitypes.in.h (_UC_ATTRIBUTE_CONST): Use __attribute__ __const__
also on clang.
(_UC_ATTRIBUTE_PURE): Use __attribute__ __pure__ also on clang.
* lib/noreturn.h (_GL_NORETURN_FUNC, _GL_NORETURN_FUNCPTR): Use
__attribute__ __noreturn__ also on clang.
* lib/obstack.h (__attribute_noreturn__): Likewise.
* lib/file-set.h (record_file): Use __attribute__ __nonnull__ also on
clang.
* lib/argp-help.c (hol_entry_long_iterate): Use __attribute__
always_inline also on clang.
* tests/test-printf-posix.c (func1, func2, func3, func4): Test also on
clang.
Bruno Haible [Mon, 10 Aug 2020 01:17:06 +0000 (03:17 +0200)]
string: Fix build error in C++ mode with clang (regression from today).
* lib/warn-on-use.h (_GL_WARN_ON_USE_CXX): Expect two rettype
parameters, one for GCC, one for clang.
* lib/c++defs.h (_GL_CXXALIASWARN1_2): Update.
* lib/string.in.h (strchr, strpbrk, strrchr): For clang, pass 'char *'
as return type.
Bruno Haible [Sun, 9 Aug 2020 20:59:26 +0000 (22:59 +0200)]
ftruncate: Use _chsize, not chsize.
* m4/ftruncate.m4 (gl_PREREQ_FTRUNCATE): Test for _chsize, not chsize.
* lib/ftruncate.c: Test HAVE__CHSIZE.
(chsize_nothrow): Use _chsize, not chsize.
Bruno Haible [Sun, 9 Aug 2020 13:58:10 +0000 (15:58 +0200)]
Use __alignof__ with clang.
* m4/stddef_h.m4 (gl_STDDEF_H): Test the alignment of max_align_t also
on clang.
* lib/alignof.h (alignof_type): Use __alignof__ also on clang.
* lib/stdalign.in.h (_Alignof): Don't activate the GCC workaround on
clang.
* lib/malloca.h (sa_alignof): Use __alignof__ also on clang.
* lib/bitset/list.c (lbitset_elt_alloc): Use __alignof__ also on clang.
* lib/bitset/table.c (tbitset_elt_alloc): Likewise.
* tests/test-stddef.c: Very the behaviour of __alignof__ also on clang.
Bruno Haible [Sun, 9 Aug 2020 13:01:23 +0000 (15:01 +0200)]
Use __typeof__ with clang.
* m4/stdint.m4 (gl_STDINT_H): Check for SIZE_MAX also on
"clang -std=gnu99".
* lib/intprops.h (_GL_HAVE___TYPEOF__): Define to 1 also on clang.
* tests/test-stdint.c (verify_same_types): Enable the check also on
clang.
Bruno Haible [Sun, 9 Aug 2020 12:51:56 +0000 (14:51 +0200)]
Add ability to emit user-defined warnings and errors with clang.
* m4/gnulib-common.m4 (gl_COMMON_BODY): Define _GL_ATTRIBUTE_ERROR,
_GL_ATTRIBUTE_WARNING using an attribute for clang.
* lib/warn-on-use.h (_GL_WARN_ON_USE, _GL_WARN_ON_USE_ATTRIBUTE,
_GL_WARN_ON_USE_CXX): Define using an attribute for clang.
* lib/cdefs.h (__warndecl, __warnattr, __errordecl): Define using an
attribute for clang.
Bruno Haible [Sun, 9 Aug 2020 10:36:37 +0000 (12:36 +0200)]
Use __builtin_signbit* with clang.
* lib/math.in.h (signbit): Use __builtin_signbit{,f,l} also on clang.
* m4/signbit.m4 (gl_SIGNBIT): Use __builtin_signbit{,f,l} also on clang.
Set REPLACE_SIGNBIT_USING_BUILTINS, not REPLACE_SIGNBIT_USING_GCC.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize
REPLACE_SIGNBIT_USING_BUILTINS, not REPLACE_SIGNBIT_USING_GCC.
* modules/math (Makefile.am): Substitute REPLACE_SIGNBIT_USING_BUILTINS,
not REPLACE_SIGNBIT_USING_GCC.
Bruno Haible [Sun, 9 Aug 2020 10:09:17 +0000 (12:09 +0200)]
Use __builtin_isnan with clang.
* lib/isnanf-nolibm.h (isnanf): Use the GCC built-in __builtin_isnan,
not __builtin_isnanf. Also on clang.
* m4/isnanf.m4 (gl_HAVE_ISNANF_NO_LIBM, gl_ISNANF_WORKS): Use the GCC
built-in __builtin_isnan, not __builtin_isnanf. Also on clang.
* lib/isnand-nolibm.h (isnand): With clang, use the GCC built-in.
* m4/isnand.m4 (gl_HAVE_ISNAND_IN_LIBM): With clang, use the GCC
built-in.
* lib/isnanl-nolibm.h (isnanf): Use the GCC built-in __builtin_isnan,
not __builtin_isnanl. Also on clang.
* m4/isnanl.m4 (gl_HAVE_ISNANL_NO_LIBM, gl_FUNC_ISNANL_WORKS): Use the
GCC built-in __builtin_isnan, not __builtin_isnanl. Also on clang.
* lib/math.in.h (__has_builtin): Remove macro.
(isnanf, gl_isnan_f): Use the GCC built-in __builtin_isnan, not
__builtin_isnanf. Also on clang.
(isnand, gl_isnan_d): With clang, use the GCC built-in.
(isnanl, gl_isnan_l): Use the GCC built-in __builtin_isnan, not
__builtin_isnanl. Also on clang.
(isnan): Use the GCC built-in __builtin_isnan in all three cases. Also
on clang.
Bruno Haible [Fri, 7 Aug 2020 21:02:21 +0000 (23:02 +0200)]
doc: Update for glibc 2.32.
* doc/glibc-functions/__libc_single_threaded.texi: New file.
* doc/glibc-functions/pthread_attr_getsigmask_np.texi: New file.
* doc/glibc-functions/pthread_attr_setsigmask_np.texi: New file.
* doc/glibc-functions/sigabbrev_np.texi: New file.
* doc/glibc-functions/sigdescr_np.texi: New file.
* doc/glibc-functions/strerrordesc_np.texi: New file.
* doc/glibc-functions/strerrorname_np.texi: New file.
* doc/gnulib.texi: Include them.
(Glibc sys/single_threaded.h): New section.
* doc/pastposix-functions/h_errno.texi: Update.
* doc/posix-functions/*.texi: Likewise.
* doc/glibc-functions/*.texi: Likewise.
Bruno Haible [Thu, 6 Aug 2020 18:55:13 +0000 (20:55 +0200)]
Consider that clang defines __OPTIMIZE__ like GCC does.
* lib/streq.h: Define the inline functions also on clang.
* lib/c-strcaseeq.h: Likewise.
* lib/c++defs.h (_GL_CXXALIASWARN_2, _GL_CXXALIASWARN1_2): Don't enable
the GCC workaround to clang.