This resolves a longstanding issue where the lock policy for shared_ptr
reference counting depends on compilation options when the header is
included, so that different -march options can cause ABI changes. For
example, objects compiled with -march=armv7 will use atomics to
synchronize reference counts, and objects compiled with -march=armv5t
will use a mutex. That means the shared_ptr control block will have a
different layout in different objects, causing ODR violations and
undefined behaviour. This was the root cause of PR libstdc++/42734 as
well as PR libstdc++/67843.
The solution is to decide on the lock policy at build time, when
libstdc++ is configured. The configure script checks for the
availability of the necessary atomic built-ins for the target and fixes
that choice permanently. Different -march flags used to compile user
code will not cause changes to the lock policy. This results in an ABI
change for certain compilations, but only where there was already an ABI
incompatibility between the libstdc++.so library and objects built with
an incompatible -march option. In general, this means a more stable ABI
that isn't silently altered when -march flags make addition atomic ops
available.
To force a target to use "atomic" or "mutex" the new configure option
--with-libstdcxx-lock-policy can be used.
In order to turn ODR violations into linker errors, the uses of
shared_ptr in filesystem directory iterators have been replaced
with __shared_ptr, and explicit instantiations are declared. This
ensures that object files using those types cannot link to libstdc++
libs unless they use the same lock policy.
PR libstdc++/67843
* acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY): Add new macro
that defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Use GLIBCXX_ENABLE_LOCK_POLICY.
* doc/xml/manual/configure.xml: Document new configure option.
* include/bits/fs_dir.h (directory_iterator): Use __shared_ptr
instead of shared_ptr.
(recursive_directory_iterator): Likewise.
(__shared_ptr<_Dir>): Add explicit instantiation declaration.
(__shared_ptr<recursive_directory_iterator::_Dir_stack>): Likewise.
* include/bits/shared_ptr_base.h (__allocate_shared, __make_shared):
Add default template argument for _Lock_policy template parameter.
* include/ext/concurrence.h (__default_lock_policy): Check macro
_GLIBCXX_HAVE_ATOMIC_LOCK_POLICY instead of checking if the current
target supports the builtins for compare-and-swap.
* src/filesystem/std-dir.cc (__shared_ptr<_Dir>): Add explicit
instantiation definition.
(__shared_ptr<recursive_directory_iterator::_Dir_stack>): Likewise.
(directory_iterator, recursive_directory_iterator): Use __make_shared
instead of make_shared.
From-SVN: r266533
This patch updates GCC to use autoconf 2.69 and automake 1.15.1.
(That's not the latest automake version, but it's the one used by
binutils-gdb, with which consistency is desirable, and in any case
seems a useful incremental update that should make a future update to
1.16.1 easier.)
The changes are generally similar to the binutils-gdb ones, and are
copied from there where shared files and directories are involved
(there are some further changes to such shared directories, however,
which I'd expect to apply to binutils-gdb once this patch is in GCC).
Largely, obsolete AC_PREREQ calls are removed, while many
AC_LANG_SOURCE calls are added to avoid warnings from aclocal and
autoconf. Multilib support is no longer included in core automake,
meaning that multilib.am needs copying from automake's contrib
directory into the GCC source tree. Autoconf 2.69 has Go support, so
local copies of that support are removed. I hope the D support will
soon be submitted to upstream autoconf so the local copy of that can
be removed in a future update. Changes to how automake generates
runtest calls mean quotes are removed from RUNTEST definitions in five
lib*/testsuite/Makefile.am files (libatomic, libgomp, libitm,
libphobos, libvtv; some others have RUNTEST definitions without
quotes, which are still OK); libgo and libphobos also get
-Wno-override added to AM_INIT_AUTOMAKE so those overrides of RUNTEST
do not generate automake warnings.
Note that the regeneration did not include regeneration of
fixincludes/config.h.in (attempting such regeneration resulted in all
the USED_FOR_TARGET conditionals disappearing; and I don't see
anything in the fixincludes/ directory that would result in such
conditionals being generated, unlike in the gcc/ directory). Also
note that libvtv/testsuite/other-tests/Makefile.in was not
regenerated; that directory is not listed as a subdirectory for which
Makefile.in gets regenerated by calling "automake" in libvtv/, so I'm
not sure how it's meant to be regenerated.
While I mostly fixed warnings should running aclocal / automake /
autoconf, there were various such warnings from automake in the
libgfortran, libgo, libgomp, liboffloadmic, libsanitizer, libphobos
directories that I did not fix, preferring to leave those to the
relevant subsystem maintainers. Specifically, most of those warnings
were of the following form (example from libgfortran):
Makefile.am:48: warning: source file 'caf/single.c' is in a subdirectory,
Makefile.am:48: but option 'subdir-objects' is disabled
automake: warning: possible forward-incompatibility.
automake: At least a source file is in a subdirectory, but the 'subdir-objects'
automake: automake option hasn't been enabled. For now, the corresponding output
automake: object file(s) will be placed in the top-level directory. However,
automake: this behaviour will change in future Automake versions: they
will
automake: unconditionally cause object files to be placed in the same subdirectory
automake: of the corresponding sources.
automake: You are advised to start using 'subdir-objects' option throughout your
automake: project, to avoid future incompatibilities.
I think it's best for the relevant maintainers to add subdir-objects
and do any other associated Makefile.am changes needed. In some cases
the paths in the warnings involved ../; I don't know if that adds any
extra complications to the use of subdir-objects.
I've tested this with native, cross and Canadian cross builds. The
risk of any OS-specific issues should I hope be rather lower than if a
libtool upgrade were included (we *should* do such an upgrade at some
point, but it's more complicated - it involves identifying all our
local libtool changes to see if any aren't included in the upstream
version we update to, and reverting an upstream libtool patch that's
inappropriate for use in GCC); I think it would be better to get this
update into GCC so that people can test in different configurations
and we can fix any issues found, rather than to try to get more and
more testing done before it goes in.
top level:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* multilib.am: New file. From automake.
Merge from binutils-gdb:
2018-06-19 Simon Marchi <simon.marchi@ericsson.com>
* libtool.m4: Use AC_LANG_SOURCE.
* configure.ac: Remove AC_PREREQ, use AC_LANG_SOURCE.
* ar-lib: New file.
* test-driver: New file.
* configure: Re-generate.
config:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* math.m4, tls.m4: Use AC_LANG_SOURCE.
Merge from binutils-gdb:
2018-06-19 Simon Marchi <simon.marchi@ericsson.com>
* override.m4 (_GCC_AUTOCONF_VERSION): Bump from 2.64 to 2.69.
fixincludes:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ.
* aclocal.m4, configure: Regenerate.
gcc:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE. Use single
line for second argument of AC_DEFINE_UNQUOTED.
* doc/install.texi (Tools/packages necessary for modifying GCC):
Update to autoconf 2.69 and automake 1.15.1.
* aclocal.m4, config.in, configure: Regenerate.
gnattools:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ.
* configure: Regenerate.
gotools:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* config/go.m4: Remove file.
* Makefile.am (ACLOCAL_AMFLAGS): Do not use -I ./config.
* configure.ac: Remove AC_PREREQ. Do not include config/go.m4.
* Makefile.in, aclocal.m4, configure: Regenerate.
intl:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
Merge from binutils-gdb:
2018-06-19 Simon Marchi <simon.marchi@ericsson.com>
* configure.ac: Add AC_USE_SYSTEM_EXTENSIONS, remove AC_PREREQ.
* configure: Re-generate.
* config.h.in: Re-generate.
* aclocal.m4: Re-generate.
libada:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ.
* configure: Regenerate.
libatomic:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* acinclude.m4: Use AC_LANG_SOURCE.
* configure.ac: Remove AC_PREREQ.
* testsuite/Makefile.am (RUNTEST): Remove quotes.
* Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
Regenerate.
libbacktrace:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE.
* Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.
libcc1:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, configure: Regenerate.
libcpp:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE.
* aclocal.m4, config.in, configure: Regenerate.
libdecnumber:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
Merge from binutils-gdb:
2018-06-19 Simon Marchi <simon.marchi@ericsson.com>
* configure.ac: Remove AC_PREREQ.
* configure: Re-generate.
* aclocal.m4.
libffi:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
(AUTOMAKE_OPTIONS): Add info-in-builddir.
(CLEANFILES): Remove doc/libffi.info.
* configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, configure, fficonfig.h.in,
include/Makefile.in, man/Makefile.in, testsuite/Makefile.in:
Regenerate.
libgcc:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE.
* configure: Regenerate.
libgfortran:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.
libgo [logically part of this change but omitted from the commit]:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* config/go.m4: Remove file.
* config/libtool.m4: Use AC_LANG_SOURCE.
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE. Use
-Wno-override in AM_INIT_AUTOMAKE call.
* Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
Regenerate.
libgomp:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am
(AUTOMAKE_OPTIONS): Add info-in-builddir.
(CLEANFILES): Remove libgomp.info.
* configure.ac: Remove AC_PREREQ.
* testsuite/Makefile.am (RUNTEST): Remove quotes.
* Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
Regenerate.
libhsail-rt:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, configure: Regenerate.
libiberty:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
Merge from binutils-gdb:
2018-06-19 Simon Marchi <simon.marchi@ericsson.com>
* configure.ac: Remove AC_PREREQ.
* configure: Re-generate.
* config.in: Re-generate.
libitm:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
(AUTOMAKE_OPTIONS): Add info-in-builddir.
(CLEANFILES): Remove libitm.info.
* configure.ac: Remove AC_PREREQ.
* testsuite/Makefile.am (RUNTEST): Remove quotes.
* Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
Regenerate.
libobjc:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ.
* aclocal.m4, config.h.in, configure: Regenerate.
liboffloadmic:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ.
* plugin/Makefile.am: Include multilib.am.
* plugin/configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, configure, plugin/Makefile.in,
plugin/aclocal.m4, plugin/configure: Regenerate.
libphobos:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ. Use -Wno-override in
AM_INIT_AUTOMAKE call.
* m4/autoconf.m4: Add extra argument to AC_LANG_DEFINE call.
* m4/druntime/os.m4: Use AC_LANG_SOURCE.
* testsuite/Makefile.am (RUNTEST): Remove quotes.
* Makefile.in, aclocal.m4, configure, libdruntime/Makefile.in,
src/Makefile.in, testsuite/Makefile.in: Regenerate.
libquadmath:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
(AUTOMAKE_OPTIONS): Remove 1.8. Add info-in-builddir.
(all-local): Define outside conditional code.
(CLEANFILES): Remove libquadmath.info.
* configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.
libsanitizer:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE.
* Makefile.in, aclocal.m4, asan/Makefile.in, configure,
interception/Makefile.in, libbacktrace/Makefile.in,
lsan/Makefile.in, sanitizer_common/Makefile.in, tsan/Makefile.in,
ubsan/Makefile.in: Regenerate.
libssp:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
(AUTOMAKE_OPTIONS): Remove 1.9.5.
* configure.ac: Remove AC_PREREQ. Quote argument to
AC_RUN_IFELSE.
* Makefile.in, aclocal.m4, configure: Regenerate.
libstdc++-v3:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ.
* Makefile.in, aclocal.m4, configure, doc/Makefile.in,
include/Makefile.in, libsupc++/Makefile.in, po/Makefile.in,
python/Makefile.in, src/Makefile.in, src/c++11/Makefile.in,
src/c++17/Makefile.in, src/c++98/Makefile.in,
src/filesystem/Makefile.in, testsuite/Makefile.in: Regenerate.
libvtv:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
* configure.ac: Remove AC_PREREQ.
* testsuite/Makefile.am (RUNTEST): Remove quotes.
* Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
Regenerate.
lto-plugin:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* configure.ac: Remove AC_PREREQ. Use AC_LANG_SOURCE.
* Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.
zlib:
2018-10-31 Joseph Myers <joseph@codesourcery.com>
PR bootstrap/82856
* Makefile.am: Include multilib.am.
Merge from binutils-gdb:
2018-06-19 Simon Marchi <simon.marchi@ericsson.com>
* configure.ac: Modernize AC_INIT call, remove AC_PREREQ.
* Makefile.am (AUTOMAKE_OPTIONS): Remove 1.8, cygnus, add foreign.
* Makefile.in: Re-generate.
* aclocal.m4: Re-generate.
* configure: Re-generate.
From-SVN: r265695
* doc/xml/gnu/fdl-1.3.xml: The Free Software Foundation web
site now uses https. Also omit the unnecessary trailing slash.
* doc/xml/gnu/gpl-3.0.xml: Ditto.
From-SVN: r264710
[ios::failure] p2: "When throwing ios_base::failure exceptions,
implementations should provide values of ec that identify the specific
reason for the failure."
This adds a new overload of __throw_ios_failure that can be passed
errno, to store error_code(errno, system_category()) in the exception
object.
PR libstdc++/85343
* acinclude.m4 (libtool_VERSION): Bump version.
* config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add new symbol version.
Export new symbol.
* configure: Regenerate.
* doc/xml/manual/abi.xml: Document new versions.
* include/bits/fstream.tcc (basic_filebuf<C, T>::underflow)
(basic_filebuf<C, T>::xsgetn): Pass errno to __throw_ios_failure.
* include/bits/functexcept.h (__throw_ios_failure(const char*, int)):
Declare new overload.
* src/c++11/cxx11-ios_failure.cc (__ios_failure): Add new constructor
and static member function.
(__throw_ios_failure(const char*, int)): Define.
* src/c++98/ios_failure.cc [!_GLIBCXX_USE_DUAL_ABI]
(__throw_ios_failure(const char*, int)): Define.
* testsuite/util/testsuite_abi.cc: Update known and latest versions.
From-SVN: r263535
Ensure that nothrow versions of new and delete call the ordinary
versions of new or delete, instead of calling malloc or free directly.
These files are all compiled with -std=gnu++14 so can use noexcept and
nullptr to make the code more readable.
PR libstdc++/68210
* doc/xml/manual/intro.xml: Document LWG 206 change.
* libsupc++/del_op.cc: Replace _GLIBCXX_USE_NOEXCEPT with noexcept.
* libsupc++/del_opa.cc: Likewise.
* libsupc++/del_opant.cc: Likewise.
* libsupc++/del_opnt.cc: Likewise. Call operator delete(ptr) instead
of free(ptr).
* libsupc++/del_ops.cc: Replace _GLIBCXX_USE_NOEXCEPT with noexcept.
* libsupc++/del_opsa.cc: Likewise.
* libsupc++/del_opva.cc: Likewise.
* libsupc++/del_opvant.cc: Likewise.
* libsupc++/del_opvnt.cc: Likewise. Call operator delete[](ptr)
instead of operator delete(ptr).
* libsupc++/del_opvs.cc: Replace _GLIBCXX_USE_NOEXCEPT with noexcept.
* libsupc++/del_opvsa.cc: Likewise.
* libsupc++/new_op.cc: Use __builtin_expect in check for zero size.
* libsupc++/new_opa.cc: Use nullptr instead of literal 0.
* libsupc++/new_opant.cc: Likewise. Replace _GLIBCXX_USE_NOEXCEPT
with noexcept.
* libsupc++/new_opnt.cc: Likewise. Call operator new(sz) instead of
malloc(sz).
* libsupc++/new_opvant.cc: Use nullptr and noexcept.
* libsupc++/new_opvnt.cc: Likewise. Call operator new[](sz) instead of
operator new(sz, nothrow).
* testsuite/18_support/new_nothrow.cc: New test.
From-SVN: r263478
Instead of repeating all the old headers for every new standard I've
changed the docs to only list the new headers for each standard.
* doc/xml/manual/test.xml: Improve documentation on writing tests for
newer standards.
* doc/xml/manual/using.xml: Document all headers for C++11 and later.
* doc/html/*: Regenerate.
From-SVN: r263163
Use -Wabi=2 to fix warnings about -Wabi having no effect on its own.
This requires suppressing two warnings in src/c++11/debug.cc which do
not affect the library ABI.
Previously libstdc++ defaulted to --enable-werror but the -Werror flag
was not actually added unless --enable-maintainer-mode was used. This is
not documented and not the expected behaviour. This removes any special
treatment for maintainer-mode, makes -Werror depend directly on
--enable-werror, and changes the default to --enable-werror=no.
PR libstdc++/86450
* acinclude.m4 (GLIBCXX_CHECK_COMPILER_FEATURES): Don't define WERROR.
(GLIBCXX_EXPORT_FLAGS): Use -Wabi=2 instead of -Wabi.
* configure: Regenerate.
* configure.ac: Change GLIBCXX_ENABLE_WERROR default to "no".
* doc/Makefile.in: Regenerate.
* fragment.am: Set WERROR_FLAG to -Werror instead of $(WERROR).
* 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++11/debug.cc: Use diagnostic pragmas to suppress warnings
from -Wabi=2 that don't affect exported symbols.
* src/c++98/Makefile.in: Regenerate.
* src/filesystem/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
From-SVN: r262824
When deduction guides are supported by the compiler (i.e. for C++17 and
later) replace two basic_string constructors by constrained function
templates as required by LWG 3075. In order to ensure that the pre-C++17
non-template constructors are still exported from the shared library
define a macro in src/c++11/string-inst.cc to force the non-template
declarations (this isn't strictly needed yet, because the string
instantiations are compiled with -std=gnu++11, but that is likely to
change).
LWG 3076 basic_string CTAD ambiguity
* doc/xml/manual/intro.xml: Document LWG 3076 change.
* include/bits/basic_string.h
[__cpp_deduction_guides && !_GLIBCXX_DEFINING_STRING_INSTANTIATIONS]
(basic_string(const _CharT*, const _Alloc&)): Turn into a function
template constrained by _RequireAllocator.
(basic_string(size_type, _CharT, const _Alloc&)): Likewise.
* src/c++11/string-inst.cc (_GLIBCXX_DEFINING_STRING_INSTANTIATIONS):
Define.
* testsuite/21_strings/basic_string/cons/char/deduction.cc: Test
deduction
* testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
Likewise.
From-SVN: r261670
* doc/xml/faq.xml: Link to C++17 status. Add note to outdated answer.
* doc/xml/manual/debug_mode.xml: Add array and forward_list to list
of C++11 containers with Debug Mode support.
* doc/xml/manual/using.xml: Document Dual ABI for ios_base::failure.
* doc/html/*: Regenerate.
From-SVN: r260129
2017-11-21 Przemyslaw Wirkus <przemyslaw.wirkus@arm.com>
* doc/xml/manual/using.xml (manual.intro.using.macros): Move
variablelist element at the end of its list.
From-SVN: r255023
Also fix declarations of special functions in C++17, to import them into
the global namespace in <math.h>, and to prevent defining the
non-standard hypergeometric functions in strict mode.
PR libstdc++/82644
* doc/xml/manual/intro.xml: Include new section.
* doc/xml/manual/status_cxxis29124.xml: New section on IS 29124
status.
* include/bits/specfun.h [__STRICT_ANSI__] (hyperg, hypergf, hypergl)
(conf_hyperg, conf_hypergf, conf_hypergl): Don't declare.
* include/c_compatibility/math.h: Import special functions into
global namespace for C++17.
* testsuite/26_numerics/headers/cmath/82644.cc: New test.
* testsuite/26_numerics/headers/cmath/functions_global_c++17.cc: New
test.
From-SVN: r254004
PR libstdc++/79433
* doc/xml/manual/status_cxx2017.xml: Update feature-test macros.
* doc/html/*: Regenerate.
* include/Makefile.am: Remove <bits/c++17_warning.h>.
* include/Makefile.in: Regenerate.
* include/bits/c++17_warning.h: Remove.
* include/bits/string_view.tcc: Do not include <bits/c++17_warning.h>
for pre-C++17 modes.
* include/std/any: Likewise.
(__cpp_lib_any): Define.
* include/std/mutex (__cpp_lib_scoped_lock): Adjust value as per new
SD-6 draft.
* include/std/numeric (__cpp_lib_gcd_lcm): Define as per new SD-6
draft.
* include/std/optional: Do not include <bits/c++17_warning.h>.
(__cpp_lib_optional): Define.
* include/std/shared_mutex: Do not include <bits/c++14_warning.h>.
* include/std/string_view: Do not include <bits/c++17_warning.h>.
(__cpp_lib_string_view): Define.
* include/std/variant: Do not include <bits/c++17_warning.h>.
(__cpp_lib_variant): Define.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust dg-error line
numbers.
* testsuite/26_numerics/gcd/1.cc: Test for __cpp_lib_gcd_lcm.
* testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
numbers.
* testsuite/26_numerics/lcm/1.cc: Test for __cpp_lib_gcd_lcm.
* testsuite/26_numerics/lcm/lcm_neg.cc: Adjust dg-error line
numbers.
* testsuite/30_threads/scoped_lock/requirements/typedefs.cc: Adjust
expected value of __cpp_lib_scoped_lock.
From-SVN: r252018
* doc/xml/faq.xml: Update several old entries. Improve
cross-references.
* doc/xml/manual/intro.xml: Add anchors to each DR.
* doc/html/*: Regenerate.
From-SVN: r250125
PR libstdc++/81092
* acinclude.m4: Bump libtool_VERSION.
* config/abi/post/i386-linux-gnu/baseline_symbols.txt: Update.
* config/abi/post/x86_64-linux-gnu/32/baseline_symbols.txt: Update.
* config/abi/pre/gnu.ver: Add wstring constructor symbols to
GLIBCXX_3.4.24 version and move random_device::_M_get_entropy() symbol
to new GLIBCXX_3.4.25 version.
* doc/xml/manual/abi.xml: Document new versions.
* doc/html/*: Regenerate.
* testsuite/21_strings/basic_string/cons/char/8.cc: Use base object
constructors to ensure required symbols are exported.
* testsuite/21_strings/basic_string/cons/wchar_t/8.cc: Likewise.
* testsuite/util/testsuite_abi.cc: Add new version.
From-SVN: r249246
As discussed in PR c++/80265 ("__builtin_{memcmp,memchr,strlen} are
not usable in constexpr functions"), use __builtin_constant_p to tell
whether we can defer to a constexpr algorithm.
I used __always_inline__ just to be thorough. It isn't really really
necessary as far as I could determine.
Changes like these:
if (__n == 0)
return 0;
- return wmemcmp(__s1, __s2, __n);
+ else
+ return wmemcmp(__s1, __s2, __n);
are necessary otherwise G++ complains that we're calling a
non-constexpr function, which looks like a a manifestation of PR67026
to me.
libstdc++-v3:
2017-06-12 Pedro Alves <palves@redhat.com>
* doc/xml/manual/status_cxx2017.xml: Update C++17 constexpr
char_traits status.
* doc/html/*: Regenerate.
* include/bits/char_traits.h (_GLIBCXX_ALWAYS_INLINE): Define if
not already defined.
(__cpp_lib_constexpr_char_traits): Uncomment.
(__constant_string_p, __constant_char_array_p): New.
(std::char_traits<char>, std::char_traits<wchar_t>): Add
_GLIBCXX17_CONSTEXPR on compare, length and find and use
__constant_string_p, __constant_char_array_p and
__builtin_constant_p to defer to __gnu_cxx::char_traits at compile
time.
* testsuite/21_strings/char_traits/requirements/
constexpr_functions_c++17.cc: Uncomment
__cpp_lib_constexpr_char_traits tests. Uncomment
test_compare<char>, test_length<char>, test_find<char>,
test_compare<wchar_t>, test_length<wchar_t> and test_find<wchar_t>
static_assert tests.
From-SVN: r249137
2017-05-23 Xi Ruoyao <ryxi@stu.xidian.edu.cn>
Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/67578
* acinclude.m4: Bump libtool_VERSION.
* config/abi/pre/gnu.ver: Create GLIBCXX_3.4.24 with new symbol.
* config.h.in: Regenerate.
* configure: Regenerate.
* configure.ac: Add test for <linux/random.h>.
* doc/xml/manual/abi.xml: Document new library version.
* include/bits/random.h (random_device::entropy)
[_GLIBCXX_USE_RANDOM_TR1]: Add call to new _M_getentropy member.
(random_device::_M_getentropy): Declare.
* src/c++11/random.cc (random_device::_M_getentropy): Define.
* testsuite/util/testsuite_abi.cc: Add GLIBCXX_3.4.24 to known
versions, and make it the latest version.
Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>
From-SVN: r248374
* doc/xml/manual/abi.xml: Rephrase one of the references to the
Itanium C++ ABI.
* doc/xml/manual/test.xml: Document DejaGnu 1.5.3 requirement.
* doc/html/*: Regenerate.
From-SVN: r247003
* doc/xml/manual/appendix_contributing.xml: Convert link to
ansi.org to https.
Update link to the C++ standard at ansi.org.
* doc/xml/faq.xml: Remove information redundant with the above;
instead add a reference.
From-SVN: r246259
* doc/xml/manual/debug_mode.xml: Update and simplify note
on link- and run-time coexistence.
Co-Authored-By: François Dumont <frs.dumont@gmail.com>
Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>
From-SVN: r245848
* doc/xml/manual/policy_data_structures.xml: Fix spelling of author's
name.
* doc/xml/manual/policy_data_structures_biblio.xml: Likewise. Remove
broken links to texts that are no longer online.
* doc/xml/manual/profile_mode.xml: Update links to CGO 2009 paper and
LCPC 2006 paper.
* doc/xml/manual/using.xml: Update links to memory model information.
* doc/xml/manual/using_exceptions.xml: Update link to "Appendix E:
Standard-Library Exception Safety".
* doc/html/*: Regenerate.
From-SVN: r245277
* doc/html/ext/lwg-active.html: Remove.
* doc/html/ext/lwg-closed.html: Ditto.
* doc/html/ext/lwg-defects.html: Ditto.
* doc/Makefile.am (xml_extradir): Remove.
(xml_extra): Ditto.
(stamp-html-docbook-lwg): Remove recipe...
(stamp-html-docbook-data): ...and its use here.
* doc/Makefile.in: Regenerate.
* doc/xml/manual/intro.xml: Shorten two paragraphs explaining
the relationship to the upstream working group.
Replace a local link to ../ext/lwg-active.html by the upstream one.
Replace all reference to ../ext/lwg-defects.html by a new entity
&DR; which refers to the upstream address.
From-SVN: r245258
* doc/xml/manual/documentation_hacking.xml: Remove obsolete link
to DocBook Publishing Tools.
epubcheck has moved to GitHub.
Update URL of the DocBook Element Reference; use that term as
link description instead of "online".
From-SVN: r245205
PR libstdc++/78905
* doc/xml/manual/abi.xml (abi.versioning.history): Add markup to
macro names, filenames, and literal values. Document _GLIBCXX_RELEASE.
Document that the deprecated _GLIBCXX_VERSION macro was removed for
the 4.0.0 release.
* doc/html/*: Regenerate.
* include/Makefile.am (_GLIBCXX_RELEASE): Set value.
* include/Makefile.in: Regenerate.
* include/bits/c++config (_GLIBCXX_RELEASE): Add #define.
* testsuite/ext/profile/mutex_extensions_neg.cc: Use lineno of 0 in
dg-error.
From-SVN: r244642
PR libstdc++/69699
* doc/xml/manual/abi.xml (abi.versioning.history): Explain why the
_GLIBCXX__ macro is not useful. Remove redundant date information
and link to the GCC release timeline.
(abi.versioning.active): Move partial sentence into the previous
paragraph.
* doc/html/*: Regenerate.
From-SVN: r244532
PR other/79046
* configure: Regenerated.
config/
* acx.m4 (GCC_BASE_VER): New m4 function.
(ACX_TOOL_DIRS): Require GCC_BASE_VER, for
--with-gcc-major-version-only use just major number from BASE-VER.
gcc/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (version): Use @get_gcc_base_ver@ instead of cat to get
version from BASE-VER file.
(CFLAGS-gcc.o): Add -DBASEVER=$(BASEVER_s).
(gcc.o): Depend on $(BASEVER).
* common.opt (dumpfullversion): New option.
* gcc.c (driver_handle_option): Handle OPT_dumpfullversion.
* doc/invoke.texi: Document -dumpfullversion.
* doc/install.texi: Document --with-gcc-major-version-only.
* configure: Regenerated.
libatomic/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
libgomp/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
libgcc/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (version): Use @get_gcc_base_ver@ instead of cat to get
version from BASE-VER file.
* configure: Regenerated.
libssp/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
liboffloadmic/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* aclocal.m4: Include ../config/acx.m4.
* configure: Regenerated.
* Makefile.in: Regenerated.
libquadmath/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
libmpx/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
libada/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (version): Use @get_gcc_base_ver@ instead of cat to get
version from BASE-VER file.
* configure: Regenerated.
lto-plugin/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
libitm/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
fixincludes/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
libcilkrts/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* aclocal.m4: Include ../config/acx.m4.
* configure: Regenerated.
* Makefile.in: Regenerated.
libcc1/
* configure.ac: Add GCC_BASE_VER. For --with-gcc-major-version-only
use just major number from BASE-VER.
* configure: Regenerated.
* Makefile.in: Regenerated.
libobjc/
* configure.ac: Add GCC_BASE_VER.
* Makefile.in (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
libstdc++-v3/
* configure.ac: Add GCC_BASE_VER.
* fragment.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* po/Makefile.in: Regenerated.
* libsupc++/Makefile.in: Regenerated.
* testsuite/Makefile.in: Regenerated.
* src/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
* include/Makefile.in: Regenerated.
* doc/Makefile.in: Regenerated.
* python/Makefile.in: Regenerated.
* src/c++11/Makefile.in: Regenerated.
* src/c++98/Makefile.in: Regenerated.
* src/filesystem/Makefile.in: Regenerated.
libvtv/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* testsuite/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
libsanitizer/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* libbacktrace/Makefile.in: Regenerated.
* interception/Makefile.in: Regenerated.
* asan/Makefile.in: Regenerated.
* ubsan/Makefile.in: Regenerated.
* configure: Regenerated.
* sanitizer_common/Makefile.in: Regenerated.
* lsan/Makefile.in: Regenerated.
* Makefile.in: Regenerated.
* tsan/Makefile.in: Regenerated.
libgfortran/
* configure.ac: Add GCC_BASE_VER.
* Makefile.am (gcc_version): Use @get_gcc_base_ver@ instead of cat to
get version from BASE-VER file.
* configure: Regenerated.
* Makefile.in: Regenerated.
From-SVN: r244521
* doc/xml/manual/intro.xml: Document LWG 2770 status. Remove entries
for 2742 and 2748.
* doc/html/*: Regenerate.
* include/std/utility (__tuple_size_cv_impl): New helper to safely
detect tuple_size<T>::value, as per LWG 2770.
(tuple_size<cv T>): Adjust partial specializations to derive from
__tuple_size_cv_impl.
* testsuite/20_util/tuple/cv_tuple_size.cc: Test SFINAE-friendliness.
From-SVN: r242452
* doc/xml/manual/intro.xml: Document LWG 2742 status.
* doc/html/*: Regenerate.
* include/bits/basic_string.h
(basic_string(const T&, size_type, size_type, const Allocator&)): Add
constructor for substring of basic_string_view, as per LWG 2742 but
with additional constraint to fix ambiguity.
* testsuite/21_strings/basic_string/cons/char/9.cc: New test.
* testsuite/21_strings/basic_string/cons/wchar_t/9.cc: New test.
From-SVN: r242416
* doc/xml/manual/intro.xml: Document LWG 2748 status.
* include/std/optional (optional<T>::swap): Use is_nothrow_swappable_v
for exception specification.
(swap(optional<T>&, optional<T>&)): Disable when T is not swappable.
* testsuite/20_util/optional/swap/2.cc: New test.
From-SVN: r242415
* doc/xml/manual/status_cxx2017.xml: Update status.
* doc/html/manual/status.html: Regenerate.
* include/bits/shared_ptr.h (shared_ptr(unique_ptr<_Yp, _Del>)): Add
extension constructor to maintain C++14 behaviour.
* include/bits/shared_ptr_base.h (__sp_array_delete): Add new struct.
(__shared_count(_Ptr, false_type), __shared_count(_Ptr, true_type)):
New constructors.
(__sp_compatible_with, __sp_is_constructible): Add specializations
for array support.
(__sp_is_constructible_arr, __sp_is_constructible_arrN): New helpers.
(__shared_ptr_access): New base class for observer member functions.
(__shared_ptr::element_type): Use remove_extent.
(__shared_ptr::_UniqCompatible): Add __sp_compatible_with check.
(__shared_ptr(_Yp*)): Use tag dispatching to call new __shared_count
constructor.
(__shared_ptr(unique_ptr<_Yp, _Del>)): Add extension constructor.
(__shared_ptr::operator*, __shared_ptr::operator->): Remove and
inherit from __shared_ptr_access base class.
(__shared_ptr::__has_esft_base): Return false for array types.
(__weak_ptr::element_type): Use remove_extent.
* include/experimental/bits/shared_ptr.h (__libfund_v1): Remove.
(__shared_ptr<__libfund_v1<_Tp>>): Remove specializations.
(__wak_ptr<__libfund_v1<_Tp>>): Likewise.
(experimental::__sp_compatible_v): Redefine using
__sp_compatible_with.
(experimental::__sp_is_constructible_v): Redefine using
__sp_is_constructible.
(get_deleter, operator<<): Change argument from __shared_ptr to
shared_ptr.
* testsuite/20_util/shared_ptr/cons/array.cc: New test.
* testsuite/20_util/shared_ptr/cons/unique_ptr_array.cc: Adjust for
new behaviour.
* testsuite/20_util/shared_ptr/observers/array.cc: Test observers for
arrays.
* testsuite/20_util/shared_ptr/observers/array_neg.cc: New test.
From-SVN: r242369
* doc/xml/manual/intro.xml: Document LWG 2442 status.
* include/std/mutex [_GLIBCXX_HAVE_TLS] (__once_call_impl): Remove.
[_GLIBCXX_HAVE_TLS] (_Once_call): Declare primary template and define
partial specialization to unpack args and forward to std::invoke.
(call_once) [_GLIBCXX_HAVE_TLS]: Use forward_as_tuple and _Once_call
instead of __bind_simple and __once_call_impl.
(call_once) [!_GLIBCXX_HAVE_TLS]: Use __invoke instead of
__bind_simple.
* testsuite/30_threads/call_once/dr2442.cc: New test.
From-SVN: r241031
* doc/xml/manual/status_cxx2011.xml: Update status.
* include/std/scoped_allocator (__outer_allocator_t, __outermost_type):
New helpers for recursive OUTERMOST.
(__outermost): Use __outermost_type::_S_outermost.
(__do_outermost, scoped_allocator_adaptor::__outermost_type): Remove.
(scoped_allocator_adaptor::__outermost_alloc_traits): Use new
__outermost_type helper.
* testsuite/20_util/scoped_allocator/outermost.cc: New test.
From-SVN: r240844
compatibility-ldbl.o is compiled with -mlong-double-64. When
long double .gnu.attributes tags are checked by the linker, it
complains about the mismatch between this file and others in
libstdc++.
* configure.ac (LONG_DOUBLE_COMPAT_FLAGS): New ACSUBST.
* src/Makefile.am (compatibility-ldbl.o, compatibility-ldbl.lo):
Use LONG_DOUBLE_COMPAT_FLAGS.
* Makefile.in: Regenerate.
* configure: 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++98/Makefile.in: Regenerate.
* src/filesystem/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
From-SVN: r240602
* doc/xml/manual/test.xml: Improve documentation of test targets.
Document new-abi-baseline, check-debug, and check-parallel targets.
From-SVN: r239573
* doc/xml/manual/build_hacking.xml: Improve markup.
* doc/xml/manual/test.xml: Likewise. Change section title from "Test"
to "Testing".
* doc/xml/faq.xml: Change link text to "Testing".
From-SVN: r239571
2016-03-23 Bernd Edlinger <bernd.edlinger@hotmail.de>
* include/Makefile.am (install-freestanding-headers): Add
concept_check.h and move.h to the installed headers.
* include/Makefile.in: Regenerated.
* include/bits/concept_check.h: Ignore _GLIBCXX_CONCEPT_CHECKS for
freestanding implementations.
* doc/xml/manual/using.xml (_GLIBCXX_CONCEPT_CHECKS): Mention
that this macro has no effect for freestanding implementations.
* doc/html/manual/using_macros.html: Likewise.
From-SVN: r234414
