Commit Graph

737 Commits

Author SHA1 Message Date
Jonathan Wakely
68c2e9e923 libstdc++: Fix and simplify freestanding configuration [PR103866]
This fixes the --disable-hosted-libstdcxx build so that it works with
--without-headers. Currently you need to also use --with-newlib, which
is confusing for users who aren't actually using newlib.

The AM_PROG_LIBTOOL checks are currently skipped for --with-newlib and
--with-avrlibc builds, with this change they are also skipped when using
--without-headers.  It would be nice if using --disable-hosted-libstdcxx
automatically skipped those checks, but GLIBCXX_ENABLE_HOSTED comes too
late to make the AM_PROG_LIBTOOL checks depend on $is_hosted.

The checks for EOF, SEEK_CUR etc. cause the build to fail if there is no
<stdio.h> available.  Unlike most headers, which get a HAVE_FOO_H macro,
<stdio.h> is in autoconf's default includes, so every check tries to
include it unconditionally. This change skips those checks for
freestanding builds.

Similarly, the checks for <stdint.h> types done by GCC_HEADER_STDINT try
to include <stdio.h> and fail for --without-headers builds. This change
skips the use of GCC_HEADER_STDINT for freestanding. We can probably
stop using GCC_HEADER_STDINT entirely, since only one file uses the
gstdint.h header that is generated, and that could easily be changed to
use <stdint.h> instead. That can wait for stage 1.

We also need to skip the GLIBCXX_CROSSCONFIG stage if --without-headers
was used, since we don't have any of the functions it deals with.

The end result of the changes above is that it should not be necessary
for a --disable-hosted-libstdcxx --without-headers build to also use
--with-newlib.

Finally, compile libsupc++ with -ffreestanding when --without-headers is
used, so that <stdint.h> will use <gcc-stdint.h> instead of expecting it
to come from libc.

libstdc++-v3/ChangeLog:

	PR libstdc++/103866
	* acinclude.m4 (GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS): Do
	nothing for freestanding builds.
	(GLIBCXX_ENABLE_HOSTED): Define FREESTANDING_FLAGS.
	* configure.ac: Do not use AC_LIBTOOL_DLOPEN when configured
	with --without-headers.  Do not use GCC_HEADER_STDINT for
	freestanding builds.
	* libsupc++/Makefile.am (HOSTED_CXXFLAGS): Use -ffreestanding
	for freestanding builds.
	* configure: Regenerate.
	* Makefile.in: Regenerate.
	* doc/Makefile.in: Regenerate.
	* include/Makefile.in: Regenerate.
	* libsupc++/Makefile.in: Regenerate.
	* po/Makefile.in: Regenerate.
	* python/Makefile.in: Regenerate.
	* src/Makefile.in: Regenerate.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++17/Makefile.in: Regenerate.
	* src/c++20/Makefile.in: Regenerate.
	* src/c++98/Makefile.in: Regenerate.
	* src/filesystem/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.
2022-01-10 12:18:14 +00:00
Jonathan Wakely
e1b8a91e47 libstdc++: Update default -std option in manual
libstdc++-v3/ChangeLog:

	* doc/xml/manual/using.xml: Update documentation around default
	-std option.
	* doc/html/*: Regenerate.
2022-01-10 12:18:14 +00:00
Jonathan Wakely
cebe875f6f libstdc++: Fix example preprocessor command in FAQ [PR103877]
libstdc++-v3/ChangeLog:

	PR libstdc++/103877
	* doc/xml/faq.xml: Add '-x c++' to preprocessor command.
	* doc/html/faq.html: Regenerate.
2022-01-05 13:47:01 +00:00
Jakub Jelinek
7adcbafe45 Update copyright years. 2022-01-03 10:42:10 +01:00
Jonathan Wakely
9e18a25331 libstdc++: Allow std::condition_variable waits to be cancelled [PR103382]
std::condition_variable::wait(unique_lock<mutex>&) is incorrectly marked
noexcept, which means that the __forced_unwind exception used by NPTL
cancellation will terminate the process. It should allow exceptions to
pass through, so that a thread can be cleanly cancelled when waiting on
a condition variable.

The new behaviour is exported as a new version of the symbol, to avoid
an ABI break for existing code linked to the non-throwing definition of
the function. Code linked against older releases will have a reference
to the @GLIBCXX_3.4.11 version, andcode compiled against the new
libstdc++ will get a reference to the @@GLIBCXX_3.4.30 version.

libstdc++-v3/ChangeLog:

	PR libstdc++/103382
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.11): Do not export old
	symbol if .symver renaming is supported.
	(GLIBCXX_3.4.30): Export new symbol if .symver renaming is
	supported.
	* doc/xml/manual/evolution.xml: Document change.
	* doc/html/manual/api.html: Regenerate.
	* include/bits/std_mutex.h (__condvar::wait, __condvar::wait_until):
	Remove noexcept.
	* include/std/condition_variable (condition_variable::wait):
	Likewise.
	* src/c++11/condition_variable.cc (condition_variable::wait):
	Likewise.
	* src/c++11/compatibility-condvar.cc (__nothrow_wait_cv::wait):
	Define nothrow wrapper around std::condition_variable::wait and
	export the old symbol as an alias to it.
	* testsuite/30_threads/condition_variable/members/103382.cc: New test.
2021-12-09 22:58:19 +00:00
Jonathan Wakely
fe9571a35d libstdc++: Fix non-reserved name in std::allocator base class [PR64135]
The possible base classes of std::allocator are new_allocator and
malloc_allocator, which both cause a non-reserved name to be declared in
every program that includes the definition of std::allocator. This is
non-conforming.

This change replaces __gnu_cxx::new_allocator with std::__new_allocator
which is identical except for using a reserved name. The non-standard
extension __gnu_cxx::new_allocator is preserved as a thin wrapper over
std::__new_allocator. There is no problem with the extension using a
non-reserved name now that it's not included by default in other
headers.

The same change could be done to __gnu_cxx::malloc_allocator but as it's
not the default configuration it can wait.

libstdc++-v3/ChangeLog:

	PR libstdc++/64135
	* config/allocator/new_allocator_base.h: Include
	<bits/new_allocator.h> instead of <ext/new_allocator.h>.
	(__allocator_base): Use std::__new_allocator instead of
	__gnu_cxx::new_allocator.
	* doc/xml/manual/allocator.xml: Document new default base class
	for std::allocator.
	* doc/xml/manual/evolution.xml: Likewise.
	* doc/html/*: Regenerate.
	* include/Makefile.am: Add bits/new_allocator.h.
	* include/Makefile.in: Regenerate.
	* include/experimental/memory_resource (new_delete_resource):
	Use std::__new_allocator instead of __gnu_cxx::new_allocator.
	* include/ext/new_allocator.h (new_allocator): Derive from
	std::__new_allocator. Move implementation to ...
	* include/bits/new_allocator.h: New file.
	* testsuite/20_util/allocator/64135.cc: New test.
2021-12-09 22:50:10 +00:00
Jonathan Wakely
e2e98f524f libstdc++: Remove broken std::allocator base classes [PR103340]
The bitmap_allocator, __mt_alloc and __pool_alloc extensions are no
longer suitable for use as the base class of std::allocator, because
they have not been updated to meet the C++20 requirements.  There is a
patch attached to PR 103340 which addresses that, but more work would be
needed to solve the linking errors that occur when the library is
configured to use them.

Using --enable-libstdcxx-allocator=bitmap wouldn't even bootstrap for
the past few years, and I can't find any gcc-testresults reports using
any of these allocators. This patch removes the configure option to use
these as the std::allocator base class. The allocators are still in the
tree and can be used directly, you just can't configure the library to
use one of them as the base class of std::allocator.

libstdc++-v3/ChangeLog:

	PR libstdc++/103340
	PR libstdc++/103400
	PR libstdc++/103381
	* acinclude.m4 (GLIBCXX_ENABLE_ALLOCATOR): Remove mt, bitmap
	and pool options.
	* configure: Regenerate.
	* config/allocator/bitmap_allocator_base.h: Removed.
	* config/allocator/mt_allocator_base.h: Removed.
	* config/allocator/pool_allocator_base.h: Removed.
	* doc/xml/manual/allocator.xml: Update.
	* doc/xml/manual/configure.xml: Update.
	* doc/xml/manual/evolution.xml: Document removal.
	* doc/xml/manual/mt_allocator.xml: Editorial tweaks.
	* doc/html/manual/*: Regenerate.
2021-12-02 16:46:28 +00:00
Jonathan Wakely
74d14778e7 libstdc++: Define std::__is_constant_evaluated() for internal use
This adds std::__is_constant_evaluated() as a C++11 wrapper for
__builtin_is_constant_evaluated, but just returning false if the
built-in isn't supported by the compiler. This allows us to use it
throughout the library without checking __has_builtin every time.

Some uses in std::vector and std::string can only be constexpr when the
std::is_constant_evaluated() function actually works, so we might as
well guard them with a relevant macro and call that function directly,
rather than the built-in or std::__is_constant_evaluated().

The remaining checks of the __cpp_lib_is_constant_evaluated macro could
now be replaced by checking __cplusplus >= 202002 instead, but there's
no practical difference. We still need some kind of preprocessor check
there anyway.

libstdc++-v3/ChangeLog:

	* doc/doxygen/user.cfg.in (PREDEFINED): Change macro name.
	* include/bits/allocator.h (allocate, deallocate): Use
	std::__is_constant_evaluated() unconditionally, instead of
	checking whether std::is_constant_evaluated() (or the built-in)
	can be used.
	* include/bits/basic_string.h: Check new macro. call
	std::is_constant_evaluated() directly in C++20-only code that is
	guarded by a suitable macro.
	* include/bits/basic_string.tcc: Likewise.
	* include/bits/c++config (__is_constant_evaluated): Define.
	(_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Replace with ...
	(_GLIBCXX_HAVE_IS_CONSTANT_EVALUATED): New macro.
	* include/bits/char_traits.h (char_traits): Replace conditional
	calls to std::is_constant_evaluated with unconditional calls to
	std::__is_constant_evaluated.
	* include/bits/cow_string.h: Use new macro.
	* include/bits/ranges_algobase.h (__copy_or_move): Replace
	conditional calls to std::is_constant_evaluated with unconditional
	calls to std::__is_constant_evaluated.
	(__copy_or_move_backward, __fill_n_fn): Likewise.
	* include/bits/ranges_cmp.h (ranges::less): Likewise.
	* include/bits/stl_algobase.h (lexicographical_compare_three_way):
	Likewise.
	* include/bits/stl_bvector.h: Call std::is_constant_evaluated
	directly in C++20-only code that is guarded by a suitable macro.
	* include/bits/stl_construct.h (_Construct, _Destroy, _Destroy_n):
	Replace is_constant_evaluated with __is_constant_evaluated.
	* include/bits/stl_function.h (greater, less, greater_equal)
	(less_equal): Replace __builtin_is_constant_evaluated and
	__builtin_constant_p with __is_constant_evaluated.
	* include/bits/stl_vector.h: Call std::is_constant_evaluated()
	in C++20-only code.
	* include/debug/helper_functions.h (__check_singular): Use
	__is_constant_evaluated instead of built-in, or remove check
	entirely.
	* include/std/array (operator<=>): Use __is_constant_evaluated
	unconditionally.
	* include/std/bit (__bit_ceil): Likewise.
	* include/std/type_traits (is_constant_evaluated): Define using
	'if consteval' if possible.
	* include/std/version: Use new macro.
	* libsupc++/compare: Use __is_constant_evaluated instead of
	__builtin_is_constant_evaluated.
	* testsuite/23_containers/array/tuple_interface/get_neg.cc:
	Adjust dg-error lines.
2021-12-01 15:00:33 +00:00
Jonathan Wakely
67013a2f71 libstdc++: Use gender-agnostic pronoun in docs
libstdc++-v3/ChangeLog:

	* doc/xml/manual/debug_mode.xml: Replace "his or her" with "they".
	* doc/html/manual/debug_mode_design.html: Regenerate.
2021-11-30 13:08:50 +00:00
Jonathan Wakely
f4130a3eb5 libstdc++: Deprecate std::unexpected and handler functions
These functions have been deprecated since C++11, and were removed in
C++17. The proposal P0323 wants to reuse the name std::unexpected for a
class template, so we will need to stop defining the current function
for C++23 anyway.

This marks them as deprecated for C++11 and up, to warn users they won't
continue to be available. It disables them for C++17 and up, unless the
_GLIBCXX_USE_DEPRECATED macro is defined.

The <unwind-cxx.h> header uses std::unexpected_handler in the public
API, but since that type is the same as std::terminate_handler we can
just use that instead, to avoid warnings about it being deprecated.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/evolution.xml: Document deprecations.
	* doc/html/*: Regenerate.
	* libsupc++/exception (unexpected_handler, unexpected)
	(get_unexpected, set_unexpected): Add deprecated attribute.
	Do not define without _GLIBCXX_USE_DEPRECATED for C++17 and up.
	* libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Disable
	deprecated warnings.
	* libsupc++/eh_ptr.cc (std::rethrow_exception): Likewise.
	* libsupc++/eh_terminate.cc: Likewise.
	* libsupc++/eh_throw.cc (__cxa_init_primary_exception):
	Likewise.
	* libsupc++/unwind-cxx.h (struct __cxa_exception): Use
	terminate_handler instead of unexpected_handler.
	(struct __cxa_dependent_exception): Likewise.
	(__unexpected): Likewise.
	* testsuite/18_support/headers/exception/synopsis.cc: Add
	dg-warning for deprecated warning.
	* testsuite/18_support/exception_ptr/60612-unexpected.cc:
	Disable deprecated warnings.
	* testsuite/18_support/set_unexpected.cc: Likewise.
	* testsuite/18_support/unexpected_handler.cc: Likewise.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/lambda/lambda-eh2.C: Add dg-warning for new
	deprecation warnings.
	* g++.dg/cpp0x/noexcept06.C: Likewise.
	* g++.dg/cpp0x/noexcept07.C: Likewise.
	* g++.dg/eh/forced3.C: Likewise.
	* g++.dg/eh/unexpected1.C: Likewise.
	* g++.old-deja/g++.eh/spec1.C: Likewise.
	* g++.old-deja/g++.eh/spec2.C: Likewise.
	* g++.old-deja/g++.eh/spec3.C: Likewise.
	* g++.old-deja/g++.eh/spec4.C: Likewise.
	* g++.old-deja/g++.mike/eh33.C: Likewise.
	* g++.old-deja/g++.mike/eh34.C: Likewise.
	* g++.old-deja/g++.mike/eh50.C: Likewise.
	* g++.old-deja/g++.mike/eh51.C: Likewise.
2021-11-04 20:53:29 +00:00
Jonathan Wakely
394f60e6ed libstdc++: Improve generated man pages for libstdc++
The man pages generated by Doxygen show internal header files, not the
standard headers that users actually care about. The run_doxygen script
uses the doc/doxygen/stdheader.cc program to address that, but it
doesn't work. It only tries to fix headers with underscores in the
names, which doesn't work for <bits/align.h> or <bits/fsteam.tcc>.  It
isn't prepared for the strings like "bits/stl_set\&.h" that are produced
by Doxygen. It doesn't know about many headers that have been added
since it was written. And the run_doxygen script fails to use its output
correctly to modify the man pages. Additionally, run_doxygen doesn't
know about new nested namespaces like std::filesystem and std::ranges.

This change rewrites the stdheader.cc program to do a better job of
finding the right header. The run_doxygen script now uses the just-built
compiler to build stdheader.cc and actually uses its output. And the
script now knows about other nested namespaces.

The stdheader.cc program might be unnecessary if we consistently used
@headername tags in the Doxygen comments, but we don't (and probably
never will).

A problem that remains after this change is that all the free function
defined in namespace std get dumped into a single man page for std(3),
without detailed descriptions. We don't even install that std(3) page,
but remove it before installation. That means only classes are
documented in man pages (including many internal ones that should not be
publicly documented such as _Deque_base and _Tuple_impl).

libstdc++-v3/ChangeLog:

	* doc/doxygen/stdheader.cc: Refactor. Use C++23. Add new
	headers.
	* scripts/run_doxygen: Fix post-processing of #include
	directives in man pages. Use new xg++ to compile helper program.
2021-10-21 22:24:57 +01:00
Jonathan Wakely
04d392e843 libstdc++: Fix doxygen generation to work with relative paths
In r12-826 I tried to remove some redundant steps from the doxygen
build, but they are needed when configure is run as a relative path. The
use of pwd is to resolve the relative path to an absolute one.

libstdc++-v3/ChangeLog:

	* doc/Makefile.am (stamp-html-doxygen, stamp-html-doxygen)
	(stamp-latex-doxygen, stamp-man-doxygen): Fix recipes for
	relative ${top_srcdir}.
	* doc/Makefile.in: Regenerate.
2021-10-19 16:07:41 +01:00
Jonathan Wakely
bd0df30a7b libstdc++: Update documentation that only refers to c++98 and c++11
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/xml/manual/using.xml: Generalize to apply to more than
	just -std=c++11.
	* doc/html/manual/using_macros.html: Regenerate.
2021-09-16 23:06:38 +01:00
Jonathan Wakely
6d692ef43b libstdc++: Update C++20 status table for layout-compatibility traits
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2020.xml: Update table.
	* doc/html/manual/status.html: Regenerate.
2021-08-24 16:15:48 +01:00
Jonathan Wakely
c5e0f954ae libstdc++: Move status table entry to be with other ranges papers
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2020.xml: Move row  earlier in table.
	* doc/html/manual/status.html: Regenerate.
2021-08-19 15:04:19 +01:00
Jonathan Wakely
778044ccf5 libstdc++: Update Doxygen config template to Doxygen 1.9.2
This adds my new SHOW_HEADERFILE option, and removes some obsolete
options.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2
2021-08-19 14:57:42 +01:00
Jonathan Wakely
926d4a71c7 libstdc++: Document P1739R4 status [PR100139]
We should document the status of this unimplemented feature.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	PR libstdc++/100139
	* doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table.
	* doc/html/manual/status.html: Regenerate.
2021-08-19 13:02:12 +01:00
Jonathan Wakely
aba938d6c3 libstdc++: Enable doxygen processing for C++20 components
Improve grouping, add @since and @deprecated information.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen
	processing for C++20 components and components that depend on
	compiler features.
	* include/bits/stl_algo.h (random_shuffle): Use @deprecated.
	* include/std/type_traits: Improve doxygen comments for C++20
	traits.
2021-08-18 15:02:31 +01:00
Jonathan Wakely
7f2f4b8791 libstdc++: Deprecate std::random_shuffle for C++14
The std::random_shuffle algorithm was removed in C++14 (without
deprecation). This adds the deprecated attribute for C++14 and later, so
that users are warned they should not be using it in those dialects.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/xml/manual/evolution.xml: Document deprecation.
	* doc/html/*: Regenerate.
	* include/bits/c++config (_GLIBCXX14_DEPRECATED): Define.
	(_GLIBCXX14_DEPRECATED_SUGGEST): Define.
	* include/bits/stl_algo.h (random_shuffle): Deprecate for C++14
	and later.
	* testsuite/25_algorithms/headers/algorithm/synopsis.cc: Adjust
	for C++11 and C++14 changes to std::random_shuffle and
	std::shuffle.
	* testsuite/25_algorithms/random_shuffle/1.cc: Add options to
	use deprecated algorithms.
	* testsuite/25_algorithms/random_shuffle/59603.cc: Likewise.
	* testsuite/25_algorithms/random_shuffle/moveable.cc: Likewise.
	* testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/2.cc:
	Likewise.
	* testsuite/25_algorithms/random_shuffle/requirements/explicit_instantiation/pod.cc:
	Likewise.
2021-08-03 15:30:35 +01:00
Jonathan Wakely
254e5d19a1 libstdc++: Restore __gnu_debug::array [PR100682]
As the PR points out, we removed the debug version of std::array without
any period of deprecation. Although std::array contains all the actual
debug checks now, removing the <debug/arrray> header breaks any code
that was using that explicitly. The manual still lists doing that as
supported.

This restores the <debug/array> header, but simply defines
__gnu_debug::array as an alias for std::array, and declares the alias
with the deprecated attribute. The docs are updated to match.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	PR libstdc++/100682
	* doc/xml/manual/debug_mode.xml: Update documentation about
	debug capability of std::array.
	* doc/html/*: Regenerate.
	* include/debug/array: New file.
2021-07-22 13:53:57 +01:00
Jonathan Wakely
f2ce64b53f libstdc++: Improvements to Doxygen markup
This attempst to improve the doxygen output to work around what seems to
be some bugs in doxygen (issues 8635 and 8638).

The @addtogroup command doesn't work for entities inside a nested
namespace (see 8635) so we need to close and reopen groups on entering
and elaving nested namespaces. This fixes the problem that
chrono::duration and chrono::time_point were not documented in the
"Time" documentation group. I am unable to make the path classes appear
as part of their relevant groups (File System and Filesystem TS), nor
the contents of <exception> or <system_error>. I have made some minor
improvements to the docs for those types, including starting to address
PR 97001 by adding @since to the doxygen comments.

This change also excludes the <experimental/bits/net.h> header from
Doxygen processing, so we don't get an unwanted "Networking-ts" group
in the documentation.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/doxygen/doxygroups.cc: Fix docs for std::literals.
	* doc/doxygen/user.cfg.in: Exclude the Networking TS header.
	Add some more predefined macros.
	* include/bits/fs_fwd.h: Move @addtogroup commands inside
	namespaces. Add better documentation.
	* include/bits/fs_path.h: Likewise.
	* include/experimental/bits/fs_fwd.h: Likewise.
	* include/experimental/bits/fs_path.h: Likewise.
	* include/ext/throw_allocator.h: Fix typo and improve docs.
	* include/std/chrono: Move @addtogroup commands.
	* include/std/system_error: Move @addtogroup commands.
	* libsupc++/exception: Improve documentation.
	* libsupc++/exception.h: Add @since documentation.
2021-07-01 18:45:48 +01:00
Jonathan Wakely
6963c3b9ed libstdc++: Improve Doxygen documentation groups [PR 101258]
This defines some new Doxygen groups for C++17 variable templates and
for the contents of <experimental/type_traits>. By documenting the group
as a whole and adding each template to a group we don't need to document
them individually.

Also mark more internals with "@cond undocumented" so that Doxygen
ignores them by default. Also make Doxygen process <experimental/simd>.

For some reason, many of the class templates in <type_traits> do not
appear in the "Metaprogramming" group. For example, add_cv,
remove_extent, and all the is_xxx_constructible and is_xxx_assignable
traits. For some reason, Doxygen doesn't include them in the group,
despite doing it correctly for other traits in the same header.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	PR libstdc++/101258
	* doc/doxygen/user.cfg.in (INPUT): Add <experimental/simd>.
	(COLS_IN_ALPHA_INDEX): Remove obsolete tag.
	(PREDEFINED): Add/fix some more macros that need to be expanded.
	* include/bits/random.h: Stop Doxygen from documenting internal
	implementation details.
	* include/bits/random.tcc: Likewise.
	* include/bits/this_thread_sleep.h: Fix @file name.
	* include/experimental/bits/simd.h: Add to Doxygen group. Do not
	document internal implementation details.
	* include/experimental/bits/simd_detail.h: Do not document
	internal implementation details.
	* include/experimental/simd: Define Doxygen groups.
	* include/experimental/type_traits: Improve documentation for
	the header file. Define groups. Use @since commands.
	* include/std/scoped_allocator (scoped_allocator_adaptor): Move
	declaration before undocumented region.
	* include/std/type_traits (true_type, false_type): Use using
	declaration instead of typedef.
	(is_invocable_v, is_nothrow_invocable_v, is_invocable_r_v)
	(is_nothrow_invocable_r_v): Move definitions next to other C++17
	variable templates.
	Do not document internal implementation details. Move misplaced
	group-end command. Define group for variable templates.
	* include/std/variant: Do not document internal implementation
	details.
	* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error
	line number.
2021-07-01 00:25:46 +01:00
Jonathan Wakely
e5c422b7d8 libstdc++: Implement LWG 415 for std::ws
For C++11 std::ws changed to be an unformatted input function, meaning
it constructs a sentry and sets badbit on exceptions.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/intro.xml: Document LWG 415 change.
	* doc/html/manual/bugs.html: Regenerate.
	* include/bits/istream.tcc (ws): Create sentry and catch
	exceptions.
	* testsuite/27_io/basic_istream/ws/char/lwg415.cc: New test.
	* testsuite/27_io/basic_istream/ws/wchar_t/lwg415.cc: New test.
2021-06-28 13:34:49 +01:00
Jonathan Wakely
f8c5b542f6 libstdc++: Implement LWG 581 for std:ostream::flush()
LWG 581 changed ostream::flush() to an unformatted output function for
C++11, but it was never implemented in libstdc++.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/intro.xml: Document LWG 581 change.
	* doc/html/manual/bugs.html: Regenerate.
	* include/bits/basic_ios.tcc: Whitespace.
	* include/bits/ostream.tcc (basic_ostream::flush()): Construct
	sentry.
	* testsuite/27_io/basic_ostream/flush/char/2.cc: Check
	additional cases.
	* testsuite/27_io/basic_ostream/flush/char/exceptions_badbit_throw.cc:
	Likewise.
	* testsuite/27_io/basic_ostream/flush/wchar_t/2.cc: Likewise.
	* testsuite/27_io/basic_ostream/flush/wchar_t/exceptions_badbit_throw.cc:
	Likewise.
2021-06-25 18:47:39 +01:00
Jonathan Wakely
f78f25f438 libstdc++: Add feature test macro for heterogeneous lookup in unordered containers
Also update the C++20 status docs.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2020.xml:
	* doc/html/*: Regenerate.
	* include/bits/hashtable.h (__cpp_lib_generic_unordered_lookup):
	Define.
	* include/std/version (__cpp_lib_generic_unordered_lookup):
	Define.
	* testsuite/23_containers/unordered_map/operations/1.cc: Check
	feature test macro.
	* testsuite/23_containers/unordered_set/operations/1.cc:
	Likewise.
2021-06-04 15:59:37 +01:00
Jonathan Wakely
ca35586cf5 libstdc++: Improve punctuation in implementation status docs
Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxxis29124.xml: Improve punctuation.
	* doc/xml/manual/status_cxxtr1.xml: Likewise.
	* doc/xml/manual/status_cxxtr24733.xml: Likewise.
	* doc/html/*: Regenerate.
2021-06-02 12:32:13 +01:00
Gerald Pfeifer
a0a7adeea3 libstdc++: Remove "Intel Compilers" bibliography entry
The original link redirects to a very generic page that advertises
lots of tools and other things, just not this.

libstdc++-v3/ChangeLog:

2021-05-31  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/abi.xml: Remove dead reference to "Intel
	Compilers for Linux: Compatibility with GNU Compilers" article.
	* doc/html/manual/abi.html: Regenerate.
2021-05-31 00:27:17 +02:00
Jonathan Wakely
e3b6d3a887 libstdc++: Allow lualatex to be used for Doxygen PDF
This allows the Doxygen PDF to be built using lualatex instead of
pdflatex, which solves a problem with pdflatex running out of memory
sometimes. This is done by adding a --latex_cmd option to the
run_doxygen script, which then sets the specified command in the
generated user.cfg file used by Doxygen. The makefile is adjusted to
pass --latex_cmd=$(LATEX_CMD) to the script, so using running make with
LATEX_CMD=lualatex will override the default.

Additionally, this does some refactoring of the doc/Makefile.am rules
and the run_doxygen script.

libstdc++-v3/ChangeLog:

	* doc/Makefile.am: Simplify doxygen recipes and use --latex_cmd.
	* doc/Makefile.in: Regenerate.
	* doc/doxygen/user.cfg.in (LATEX_CMD_NAME): Add placeholder
	value.
	* scripts/run_doxygen (print_usage): Always print to stdout and
	do not exit.
	(fail): New function for exiting on error.
	(parse_options): Handle --latex_cmd. Do not treat --help the
	same as errors. Simplify handling of required arguments.
2021-05-17 12:13:41 +01:00
Gerald Pfeifer
f58541b2a4 libstdc++: Move unix.org reference to https
libstdc++-v3/ChangeLog:

	* doc/xml/manual/ctype.xml: Move unix.org reference to https.
	* doc/html/manual/facets.html: Regenerate.
2021-05-03 02:02:25 +02:00
Jonathan Wakely
43a35b26e2 libstdc++: Reduce output of 'make doc-pdf-doxygen'
Use '@' to prevent Make from echoing the recipe, so that users don't see
this every time:

  if [ -f ${doxygen_pdf} ]; then
    mv ${doxygen_pdf} ${api_pdf} ;
    echo ":: PDF file is ${api_pdf}";
  else
    echo "... error";
    grep -F 'LaTeX Error' ${doxygen_outdir}/latex/refman.log;
    grep -F 'TeX capacity exceeded, sorry' ${doxygen_outdir}/latex/refman.log;
    exit 12;
  fi

The presence of the "error" strings in the output makes it look like an
error happened. By suppressing the echoing user's will only see "error"
if the 'else' branch is taken.

libstdc++-v3/ChangeLog:

	* doc/Makefile.am (stamp-pdf-doxygen): Improve comment about
	dealing with errors. Use '@' to prevent shell command being
	echoed.
	* doc/Makefile.in: Regenerate.
2021-04-28 14:49:28 +01:00
Jonathan Wakely
989e512f71 libstdc++: Remove outdated docs on libg++ and libstdc++-v2
The libstdc++-v3 manual doesn't need to document how to use its
predecessors.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/backwards_compatibility.xml: Remove porting
	notes for libg++ and libstdc++-v2, and bibliography.
	* doc/html/*: Regenerated.
2021-04-13 16:34:15 +01:00
Jonathan Wakely
be8d5f99f5 libstdc++: Improve error reporting if PDF generation fails
If pdflatex runs out of memory the build fails with no hint what's
wrong. This adds another grep command to the makefile so that an
out-of-memory error will result in more information being shown.

As suggested in https://bugzilla.redhat.com/show_bug.cgi?id=1841056
using lualatex can be used as a workaround.

libstdc++-v3/ChangeLog:

	* doc/Makefile.am (stamp-pdf-doxygen): Also grep for
	out-of-memory error in log file.
	* doc/Makefile.in: Regenerate.
2021-04-08 21:42:59 +01:00
Jonathan Wakely
e19afa0645 libstdc++: Adjust link to PSTL upstream (again)
The LLVM project renamed their default branch to 'main'.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2017.xml: Adjust link for PSTL.
	* doc/html/manual/status.html: Regenerate.
2021-03-29 14:14:00 +01:00
Jonathan Wakely
ed255fd5ed libstdc++: Document library versioning for GCC 11
libstdc++-v3/ChangeLog:

	* doc/xml/manual/abi.xml: Document versioning for GCC 11.
	* doc/html/manual/abi.html: Regenerate.
2021-02-25 15:35:59 +00:00
Jonathan Wakely
1dfd95f0a0 libstdc++: Fix filesystem::rename on Windows [PR 98985]
The _wrename function won't overwrite an existing file, so use
MoveFileEx instead. That allows renaming directories over files, which
POSIX doesn't allow, so check for that case explicitly and report an
error.

Also document the deviation from the expected behaviour, and add a test
for filesystem::rename which was previously missing.

The Filesystem TS experimental::filesystem::rename doesn't have that
extra code to handle directories correctly, so the relevant parts of the
new test are not run on Windows.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2014.xml: Document implementation
	specific properties of std::experimental::filesystem::rename.
	* doc/xml/manual/status_cxx2017.xml: Document implementation
	specific properties of std::filesystem::rename.
	* doc/html/*: Regenerate.
	* src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
	for directories on Windows.
	* src/filesystem/ops-common.h (__gnu_posix::rename): Use
	MoveFileExW on Windows.
	* testsuite/27_io/filesystem/operations/rename.cc: New test.
	* testsuite/experimental/filesystem/operations/rename.cc: New test.
2021-02-12 15:29:50 +00:00
Jonathan Wakely
ce43c90604 libstdc++: Document when C++11/14/17 support became stable [PR 99058]
libstdc++-v3/ChangeLog:

	PR libstdc++/99058
	* doc/xml/manual/status_cxx2011.xml: Document when support
	became stable.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.
2021-02-11 17:28:16 +00:00
Jonathan Wakely
886f9f519c libstdc++: Fix markup for status tables in docs
libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.
2021-02-02 09:55:52 +00:00
Jonathan Wakely
90c9b2c176 libstdc++: Update C++17 status table for <charconv>
libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2011.xml: Update std::call_once
	status.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise. Update
	std::from_chars and std::to_chars status. Fix formatting.
	* doc/html/manual/status.html: Regenerate.
2021-02-01 16:06:45 +00:00
Jonathan Wakely
3670dbe490 libstdc++: Regenerate libstdc++ HTML docs
libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
	* doc/html/*: Regenerate.
2021-01-27 17:53:07 +00:00
Matthias Kretz
2bcceb6fc5 libstdc++: Add std::experimental::simd from the Parallelism TS 2
Adds <experimental/simd>.

This implements the simd and simd_mask class templates via
[[gnu::vector_size(N)]] data members. It implements overloads for all of
<cmath> for simd. Explicit vectorization of the <cmath> functions is not
finished.

The majority of functions are marked as [[gnu::always_inline]] to enable
quasi-ODR-conforming linking of TUs with different -m flags.
Performance optimization was done for x86_64.  ARM, Aarch64, and POWER
rely on the compiler to recognize reduction, conversion, and shuffle
patterns.

Besides verification using many different machine flages, the code was
also verified with different fast-math flags.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2017.xml: Add implementation status
	of the Parallelism TS 2. Document implementation-defined types
	and behavior.
	* include/Makefile.am: Add new headers.
	* include/Makefile.in: Regenerate.
	* include/experimental/simd: New file. New header for
	Parallelism TS 2.
	* include/experimental/bits/numeric_traits.h: New file.
	Implementation of P1841R1 using internal naming. Addition of
	missing IEC559 functionality query.
	* include/experimental/bits/simd.h: New file. Definition of the
	public simd interfaces and general implementation helpers.
	* include/experimental/bits/simd_builtin.h: New file.
	Implementation of the _VecBuiltin simd_abi.
	* include/experimental/bits/simd_converter.h: New file. Generic
	simd conversions.
	* include/experimental/bits/simd_detail.h: New file. Internal
	macros for the simd implementation.
	* include/experimental/bits/simd_fixed_size.h: New file. Simd
	fixed_size ABI specific implementations.
	* include/experimental/bits/simd_math.h: New file. Math
	overloads for simd.
	* include/experimental/bits/simd_neon.h: New file. Simd NEON
	specific implementations.
	* include/experimental/bits/simd_ppc.h: New file. Implement bit
	shifts to avoid invalid results for integral types smaller than
	int.
	* include/experimental/bits/simd_scalar.h: New file. Simd scalar
	ABI specific implementations.
	* include/experimental/bits/simd_x86.h: New file. Simd x86
	specific implementations.
	* include/experimental/bits/simd_x86_conversions.h: New file.
	x86 specific conversion optimizations. The conversion patterns
	work around missing conversion patterns in the compiler and
	should be removed as soon as PR85048 is resolved.
	* testsuite/experimental/simd/standard_abi_usable.cc: New file.
	Test that all (not all fixed_size<N>, though) standard simd and
	simd_mask types are usable.
	* testsuite/experimental/simd/standard_abi_usable_2.cc: New
	file. As above but with -ffast-math.
	* testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
	from the standard test loop. Instead use
	check_vect_support_and_set_flags to build simd tests with the
	relevant machine flags.
2021-01-27 16:37:26 +00:00
Jonathan Wakely
0db5f48848 libstdc++: Remove <debug/array> from Doxygen config
This header was removed recently, so Doxygen shouldn't try to process
it.

libstdc++-v3/ChangeLog:

	* doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.
2021-01-13 10:29:45 +00:00
Thomas Rodgers
b7c3f201be libstdc++: Add support for C++20 barriers
Adds <barrier>

libstdc++-v3/ChangeLog:

	* doc/doxygen/user.cfg.in: Add new header.
	* include/Makefile.am (std_headers): likewise.
	* include/Makefile.in: Regenerate.
	* include/precompiled/stdc++.h: Add new header.
	* include/std/barrier: New file.
	* include/std/version: Add __cpp_lib_barrier feature test macro.
	* testsuite/30_threads/barrier/1.cc: New test.
	* testsuite/30_threads/barrier/2.cc: Likewise.
	* testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
	* testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
	* testsuite/30_threads/barrier/arrive.cc: Likewise.
	* testsuite/30_threads/barrier/completion.cc: Likewise.
2021-01-07 12:52:37 -08:00
Jakub Jelinek
99dee82307 Update copyright years. 2021-01-04 10:26:59 +01:00
Gerald Pfeifer
15b99a6b83 libstdc++: Update link to Arm ABI
libstdc++-v3:

2020-12-27  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/abi.xml: Update link to Arm ABI.
	* doc/html/manual/abi.html: Regenerate.
2020-12-27 21:25:32 +01:00
Gerald Pfeifer
0e283e2c9f libstdc++: Move Valgrind references to https
libstdc++-v3:

2020-12-27  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/debug.xml: Move Valgrind references to https.
	* doc/html/manual/debug.html: Regenerate.
2020-12-27 11:17:21 +01:00
Gerald Pfeifer
9d426e4dbc libstdc++: Update link to Intel/GNU compatibility paper
libstdc++-v3:

2020-12-26  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/abi.xml: Update link to Intel's compatibility
	with GNU compilers document.
	* doc/html/manual/abi.html: Regenerate.
2020-12-26 13:37:48 +01:00
Gerald Pfeifer
a746898dff libstdc++: Update link to Java docs
libstdc++-v3:

2020-12-25  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/messages.xml: Update link to Java docs.
	* doc/html/manual/facets.html: Ditto.
2020-12-25 19:14:35 +01:00
Gerald Pfeifer
4ee8e5949a libstdc++: Convert three doxygen.nl links to https
libstdc++-v3:
2020-12-25  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/documentation_hacking.xml: Convert three links
	to doxygen.nl to https.
	* doc/html/manual/documentation_hacking.html: Regenerate.
2020-12-25 15:20:43 +01:00
Jonathan Wakely
7c1e7eed89 libstdc++: Add C++ runtime support for new 128-bit long double format
This adds support for the new __ieee128 long double format on
powerpc64le targets.

Most of the complexity comes from wanting a single libstdc++.so library
that contains the symbols needed by code compiled with both
-mabi=ibmlongdouble and -mabi=ieeelongdouble (and not forgetting
-mlong-double-64 as well!)

In a few places this just requires an extra overload, for example
std::from_chars has to be overloaded for both forms of long double.
That can be done in a single translation unit that defines overloads
for 'long double' and also '__ieee128', so that user code including
<charconv> will be able to link to a definition for either type of long
double. Those are the easy cases.

The difficult parts are (as for the std::string ABI transition) the I/O
and locale facets. In order to be able to write either form of long
double to an ostream such as std::cout we need the locale to contain a
std::num_put facet that can handle both forms. The same approach is
taken as was already done for supporting 64-bit long double and 128-bit
long double: adding extra overloads of do_put to the facet class. On
targets where the new long double code is enabled, the facets that are
registered in the locale at program startup have additional overloads so
that they can work with any long double type. Where this fails to work
is if user code installs its own facet, which will probably not have the
additional overloads and so will only be able to output one or the other
type. In practice the number of users expecting to be able to use their
own locale facets in code using a mix of -mabi=ibmlongdouble and
-mabi=ieeelongdouble is probably close to zero.

libstdc++-v3/ChangeLog:

	* Makefile.in: Regenerate.
	* config.h.in: Regenerate.
	* config/abi/pre/gnu.ver: Make patterns less greedy.
	* config/os/gnu-linux/ldbl-ieee128-extra.ver: New file with patterns
	for IEEE128 long double symbols.
	* configure: Regenerate.
	* configure.ac: Enable alternative 128-bit long double format on
	powerpc64*-*-linux*.
	* doc/Makefile.in: Regenerate.
	* fragment.am: Regenerate.
	* include/Makefile.am: Set _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT.
	* include/Makefile.in: Regenerate.
	* include/bits/c++config: Define inline namespace for new long
	double symbols. Don't define _GLIBCXX_USE_FLOAT128 when it's the
	same type as long double.
	* include/bits/locale_classes.h [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT]
	(locale::_Impl::_M_init_extra_ldbl128): Declare new member function.
	* include/bits/locale_facets.h (_GLIBCXX_NUM_FACETS): Simplify by
	only counting narrow character facets.
	(_GLIBCXX_NUM_CXX11_FACETS): Likewise.
	(_GLIBCXX_NUM_LBDL_ALT128_FACETS): New.
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT] (num_get::__do_get): Define
	vtable placeholder for __ibm128 long double type.
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__]
	(num_get::__do_get): Declare vtable placeholder for __ibm128 long
	double type.
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__]
	(num_put::__do_put): Likewise.
	* include/bits/locale_facets.tcc
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__]
	(num_get::__do_get, num_put::__do_put): Define.
	* include/bits/locale_facets_nonio.h
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__]
	(money_get::__do_get): Declare vtable placeholder for __ibm128 long
	double type.
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__]
	(money_put::__do_put): Likewise.
	* include/bits/locale_facets_nonio.tcc
	[_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__]
	(money_get::__do_get, money_put::__do_put): Define.
	* include/ext/numeric_traits.h [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT]
	(__numeric_traits<__ibm128>, __numeric_traits<__ieee128>): Define.
	* libsupc++/Makefile.in: Regenerate.
	* po/Makefile.in: Regenerate.
	* python/Makefile.in: Regenerate.
	* src/Makefile.am: Add compatibility-ldbl-alt128.cc and
	compatibility-ldbl-alt128-cxx11.cc sources and recipes for objects.
	* src/Makefile.in: Regenerate.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++11/compatibility-ldbl-alt128-cxx11.cc: New file defining
	symbols using the old 128-bit long double format, for the cxx11 ABI.
	* src/c++11/compatibility-ldbl-alt128.cc: Likewise, for the
	gcc4-compatible ABI.
	* src/c++11/compatibility-ldbl-facets-aliases.h: New header for long
	double compat aliases.
	* src/c++11/cow-locale_init.cc: Add comment.
	* src/c++11/cxx11-locale-inst.cc: Define C and C_is_char
	unconditionally.
	* src/c++11/cxx11-wlocale-inst.cc: Add sanity check. Include
	locale-inst.cc directly, not via cxx11-locale-inst.cc.
	* src/c++11/locale-inst-monetary.h: New header for monetary
	category instantiations.
	* src/c++11/locale-inst-numeric.h: New header for numeric category
	instantiations.
	* src/c++11/locale-inst.cc: Include new headers for monetary,
	numeric, and long double definitions.
	* src/c++11/wlocale-inst.cc: Remove long double compat aliases that
	are defined in new header now.
	* src/c++17/Makefile.am: Use -mabi=ibmlongdouble for
	floating_from_chars.cc.
	* src/c++17/Makefile.in: Regenerate.
	* src/c++17/floating_from_chars.cc (from_chars_impl): Add
	if-constexpr branch for __ieee128.
	(from_chars): Overload for __ieee128.
	* src/c++20/Makefile.in: Regenerate.
	* src/c++98/Makefile.in: Regenerate.
	* src/c++98/locale_init.cc (num_facets): Adjust calculation.
	(locale::_Impl::_Impl(size_t)): Call _M_init_extra_ldbl128.
	* src/c++98/localename.cc (num_facets): Adjust calculation.
	(locale::_Impl::_Impl(const char*, size_t)): Call
	_M_init_extra_ldbl128.
	* src/filesystem/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/util/testsuite_abi.cc: Add new symbol versions.
	Allow new symbols to be added to GLIBCXX_IEEE128_3.4.29 and
	CXXABI_IEEE128_1.3.13 too.
	* testsuite/26_numerics/complex/abi_tag.cc: Add u9__ieee128 to
	regex matching expected symbols.
2020-12-16 23:25:01 +00:00
Gerald Pfeifer
23900be4d3 libstdc++: Update link to Unicode-HOWTO
libstdc++-v3/ChangeLog:

2020-12-15  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/codecvt.xml: Update link to Unicode-HOWTO.
	* doc/html/manual/facets.html: Regenerate.
2020-12-15 09:33:18 +01:00