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2020-12-16libstdc++: Test errno macros directly, not via autoconf [PR 93151]Jonathan Wakely1-29/+0
This fixes a bug caused by a mismatch between the macros defined by <errno.h> when GCC is built and the macros defined by <errno.h> when users include <system_error>. If the user code is compiled with _XOPEN_SOURCE defined to 500 or 600, Darwin suppresses the ENOTRECOVERABLE and EOWNERDEAD macros, which are not defined by SUSv3 (aka POSIX.1-2001). Since POSIX requires the errno macros to be macros (and not variables or enumerators) we can just test for them directly using the preprocessor. That means that <system_error> will match what is actuallydefined when it's included, not what was defined when GCC was built. With that change there is no need for the GLIBCXX_CHECK_SYSTEM_ERROR configure checks and they can be removed. libstdc++-v3/ChangeLog: PR libstdc++/93151 * acinclude.m4 (GLIBCXX_CHECK_SYSTEM_ERROR): Remove. * configure.ac: Regenerate. * config/os/generic/error_constants.h: Test POSIX errno macros directly, instead of corresponding _GLIBCXX_HAVE_EXXX macros. * testsuite/19_diagnostics/headers/system_error/errc_std_c++0x.cc: Likewise. * testsuite/19_diagnostics/headers/system_error/93151.cc: New test.
2020-12-15libstdc++: Support libc with stdio-only I/O in libstdc++Keith Packard1-7/+13
The current libstdc++ basic_file_stdio.cc code assumes a POSIX API underneath the stdio implementation provided by the host libc. This means that the host must provide a fairly broad POSIX file API, including read, write, open, close, lseek and ioctl. This patch changes basic_file_stdio.cc to only use basic ANSI-C stdio functions, allowing it to be used with libc implementations like picolibc which may not have a POSIX operating system underneath. This is enabled by a new --enable-cstdio=stdio_pure configure option. Aided-by: Jonathan Wakely <jwakely@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com> libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_CSTDIO): Allow "stdio_pure" option and define _GLIBCXX_USE_PURE_STDIO when it is used. Also add "stdio_posix" option as an alias for "stdio". * config/io/basic_file_stdio.cc [_GLIBCXX_USE_PURE_STDIO]: Only use defined stdio entry points for all I/O operations, without direct calls to underlying POSIX functions. * config.h.in: Regenerate. * configure: Regenerate.
2020-12-09libstdc++: Fix build failure for target with no way to sleepJonathan Wakely1-0/+6
In previous releases the std::this_thread::sleep_for function was only declared if the target supports multiple threads. I changed that recently in r11-2649-g5bbb1f3000c57fd4d95969b30fa0e35be6d54ffb so that sleep_for could be used single-threaded. But that means that targets using --disable-threads are now required to provide some way to sleep. This breaks the build for (at least) AVR when trying to build a hosted library. This patch adds a new autoconf macro that is defined when no way to sleep is available, and uses that to suppress the sleeping functions in std::this_thread. The #error in src/c++11/thread.cc is retained for the case where there is no sleep function available but multiple threads are supported. This is consistent with previous releases, but that #error could probably be removed without any consequences. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Define NO_SLEEP if none of nanosleep, sleep and Sleep is available. * config.h.in: Regenerate. * configure: Regenerate. * include/std/thread [_GLIBCXX_NO_SLEEP] (__sleep_for): Do not declare. [_GLIBCXX_NO_SLEEP] (sleep_for, sleep_until): Do not define. * src/c++11/thread.cc [_GLIBCXX_NO_SLEEP] (__sleep_for): Do not define.
2020-11-26ada: c++: Get rid of libposix4, librt on SolarisRainer Orth1-12/+6
I recently noticed that neither libposix4 nor librt are needed on Solaris 11 any longer: * libposix4 was renamed to librt in Solaris 7 back in 1998. * librt was folded into libc in the OpenSolaris timeframe, leaving librt only as a filter on libc. Thus, it's no longer needed on either Solaris 11 or Illumos. The following patch removes both uses. At the same time, Ada's use of libthread has gone: it was folded into libc in Solaris 10 already. TIME_LIBRARY and friends in g++ are likewise removed: Solaris was the only user. Bootstrapped without regressions on i386-pc-solaris2.11, sparc-sun-solaris2.11, and x86_64-pc-linux-gnu. 2020-11-16 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> gcc/cp: * g++spec.c (TIMELIB, TIME_LIBRARY): Remove. (lang_specific_driver): Remove TIME_LIBRARY handling. gcc: * config/sol2.h (TIME_LIBRARY): Remove. libstdc++-v3: * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Remove libposix4 references. <solaris*>: Don't use -lrt any longer. * configure: Regenerate. * doc/xml/manual/configure.xml (--enable-libstdcxx-time=OPTION): Remove libposix4 reference. gcc/ada: * Makefile.rtl <sparc*-sun-solaris*> (THREADSLIB): Remove. (MISCLIB): Remove -lposix4. <*86-*-solaris2*>: Likewise. * libgnarl/s-osinte__solaris.ads (System.OS_Interface): Remove -lposix4 -lthread.
2020-11-23libstdc++: Add configure checks for semaphoresJonathan Wakely1-0/+37
This moves the checks for POSIX semaphores to configure time. As well as requiring <semaphore.h> and SEM_VALUE_MAX, we also require the sem_timedwait function. That was only optional in POSIX 2001 (and is absent on Darwin). libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_CHECK_GTHREADS): Check for * config.h.in: Regenerate. * configure: Regenerate. * include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE): Check autoconf macro instead of defining it here.
2020-11-17libstdc++: Revert changes for SYS_clock_gettime64 [PR 93421]Jonathan Wakely1-4/+25
As discussed in the PR, it's incredibly unlikely that a system that needs to use the SYS_clock_gettime syscall (e.g. glibc 2.16 or older) is going to define the SYS_clock_gettime64 macro. Ancient systems that need to use the syscall aren't going to have time64 support. This reverts the recent changes to try and make clock_gettime syscalls be compatible with systems that have been updated for time64 (those changes were wrong anyway as they misspelled the SYS_clock_gettime64 macro). The changes for futex syscalls are retained, because we still use them on modern systems that might be using time64. To ensure that the clock_gettime syscalls are safe, configure will fail if SYS_clock_gettime is needed, and SYS_clock_gettime64 is also defined (but to a distinct value from SYS_clock_gettime), and the tv_sec member of timespec is larger than long. This means we will be unable to build on a hypothetical system where we need the time32 version of SYS_clock_gettime but where userspace is using a time64 struct timespec. In the unlikely event that this failure is triggered on any real systems, we can fix it later. But we probably won't need to. libstdc++-v3/ChangeLog: PR libstdc++/93421 * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Fail if struct timespec isn't compatible with SYS_clock_gettime. * configure: Regenerate. * src/c++11/chrono.cc: Revert changes for time64 compatibility. Add static_assert instead. * src/c++11/futex.cc (_M_futex_wait_until_steady): Assume SYS_clock_gettime can use struct timespec.
2020-11-11libstdc++: Exclude cygwin and mingw from linker relro supportJonathan Yong1-7/+16
PE format does not have ELF style relro linker support, exclude from checking. If the host linker supports ELF format, configure may get confused. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Exclude cygwin and mingw from relro linker test. * configure: Regenerate.
2020-10-28libstdc++: Implement C++20 features for <sstream>Thomas Rodgers1-1/+1
New ctors and ::view() accessor for - * basic_stingbuf * basic_istringstream * basic_ostringstream * basic_stringstreamm New ::get_allocator() accessor for basic_stringbuf. libstdc++-v3/ChangeLog: * acinclude.m4 (glibcxx_SUBDIRS): Add src/c++20. * config/abi/pre/gnu.ver (GLIBCXX_3.4.29): New symbols. * configure: Regenerate. * include/std/sstream: (basic_stringbuf::basic_stringbuf(allocator const&)): New constructor. (basic_stringbuf::basic_stringbuf(openmode, allocator const&)): Likewise. (basic_stringbuf::basic_stringbuf(basic_string&&, openmode)): Likewise. (basic_stringbuf::basic_stringbuf(basic_stringbuf&&, allocator const&)): Likewise. (basic_stringbuf::get_allocator()): New method. (basic_stringbuf::view()): Likewise. (basic_istringstream::basic_istringstream(basic_string&&, openmode)): New constructor. (basic_istringstream::basic_istringstream(openmode, allocator const&)): Likewise (basic_istringstream::view()): New method. (basic_ostringstream::basic_ostringstream(basic_string&&, openmode)): New constructor. (basic_ostringstream::basic_ostringstream(openmode, allocator const&)): Likewise (basic_ostringstream::view()): New method. (basic_stringstream::basic_stringstream(basic_string&&, openmode)): New constructor. (basic_stringstream::basic_stringstream(openmode, allocator const&)): Likewise (basic_stringstream::view()): New method. * src/Makefile.in: Add c++20 directory. * src/Makefile.am: Regenerate. * src/c++20/Makefile.am: Add makefile for new sub-directory. * src/c++20/Makefile.in: Generate. * src/c++20/sstream-inst.cc: New file defining explicit instantiations for basic_stringbuf, basic_istringstream, basic_ostringstream, and basic_stringstream member functions added in C++20. * testsuite/27_io/basic_stringbuf/cons/char/2.cc: New test. * testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise. * testsuite/27_io/basic_stringbuf/view/char/1.cc: Likewise. * testsuite/27_io/basic_stringbuf/view/wchar_t/1.cc: Likewise. * testsuite/27_io/basic_istringstream/cons/char/1.cc: Likewise. * testsuite/27_io/basic_istringstream/cons/wchar_t/1.cc: Likewise. * testsuite/27_io/basic_istringstream/view/char/1.cc: Likewise. * testsuite/27_io/basic_istringstream/view/wchar_t/1.cc: Likewise. * testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise. * testsuite/27_io/basic_ostringstream/cons/wchar_t/1.cc: Likewise. * testsuite/27_io/basic_ostringstream/view/char/1.cc: Likewise. * testsuite/27_io/basic_ostringstream/view/wchar_t/1.cc: Likewise. * testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise. * testsuite/27_io/basic_stringstream/cons/wchar_t/1.cc: Likewise. * testsuite/27_io/basic_stringstream/view/char/1.cc: Likewise. * testsuite/27_io/basic_stringstream/view/wchar_t/1.cc: Likewise.
2020-08-13libstdc++: Deprecate the --enable-cheaders=c_std configurationJonathan Wakely1-2/+14
These headers do not offer any tangible benefit compared to the default c_global version. They are not actively maintained meaning that they have bugs which have already been fixed for the c_global headers. This change adds a warning if they are used, and requires a new --enable-cheaders-obsolete option to allow their use. Unless we receive reports from users who rely on the c_std headers they should be removed at some point in future. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std option is used and fail unless --enable-cheaders-obsolete is also used. * configure: Regenerate.
2020-08-10libstdc++: Make C++17 ignore --disable-libstdcxx-filesystem-ts [PR 94681]Jonathan Wakely1-207/+206
The configure switch should only affect the optional Filesystem TS, not the std::filesystem features of C++17. libstdc++-v3/ChangeLog: PR libstdc++/94681 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Do not depend on $enable_libstdcxx_filesystem_ts. * configure: Regenerate.
2020-07-20libstdc++: Add std::from_chars for floating-point typesJonathan Wakely1-1/+1
This adds the missing std::from_chars overloads for floating-point types, as required for C++17 conformance. The implementation is a hack and not intended to be used in the long term. Rather than parsing the string directly, this determines the initial portion of the string that matches the pattern determined by the chars_format parameter, then creates a NTBS to be parsed by strtod (or strtold or strtof). Because creating a NTBS requires allocating memory, but std::from_chars is noexcept, we need to be careful to minimise allocation. Even after being careful, allocation failure is still possible, and so a non-conforming std::no_more_memory error code might be returned. Because strtod et al depend on the current locale, but std::from_chars does not, we change the current thread's locale to "C" using newlocale and uselocale before calling strtod, and restore it afterwards. Because strtod doesn't have the equivalent of a std::chars_format parameter, it has to examine the input to determine the format in use, even though the std::from_chars code has already parsed it once (or twice for large input strings!) By replacing the use of strtod we could avoid allocation, avoid changing locale, and use optimised code paths specific to each std::chars_format case. We would also get more portable behaviour, rather than depending on the presence of uselocale, and on any bugs or quirks of the target libc's strtod. Replacing strtod is a project for a later date. libstdc++-v3/ChangeLog: * acinclude.m4 (libtool_VERSION): Bump version. * config.h.in: Regenerate. * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.29 version and new exports. * config/os/gnu-linux/ldbl-extra.ver: Add _GLIBCXX_LDBL_3.4.29 version and new export. * configure: Regenerate. * configure.ac: Check for <xlocale.h> and uselocale. * crossconfig.m4: Add macro or checks for uselocale. * include/std/charconv (from_chars): Declare overloads for float, double, and long double. * src/c++17/Makefile.am: Add new file. * src/c++17/Makefile.in: Regenerate. * src/c++17/floating_from_chars.cc: New file. (from_chars): Define for float, double, and long double. * testsuite/20_util/from_chars/1_c++20_neg.cc: Prune extra diagnostics caused by new overloads. * testsuite/20_util/from_chars/1_neg.cc: Likewise. * testsuite/20_util/from_chars/2.cc: Check leading '+'. * testsuite/20_util/from_chars/4.cc: New test. * testsuite/20_util/from_chars/5.cc: New test. * testsuite/util/testsuite_abi.cc: Add new symbol versions.
2020-01-28libstdc++: Replace glibc-specific check for clock_gettime (PR 93325)Jonathan Wakely1-14/+8
It's wrong to assume that clock_gettime is unavailable on any *-*-linux* target that doesn't have glibc 2.17 or later. Use a generic test instead of using __GLIBC_PREREQ. Only do that test when is_hosted=yes so that we don't get an error for cross targets without a working linker. This ensures that C library's clock_gettime will be used on non-glibc targets, instead of an incorrect syscall to SYS_clock_gettime. PR libstdc++/93325 * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Use AC_SEARCH_LIBS for clock_gettime instead of explicit glibc version check. * configure: Regenerate.
2020-01-24Add `--with-toolexeclibdir=' configuration optionMaciej W. Rozycki1-1/+10
Provide means, in the form of a `--with-toolexeclibdir=' configuration option, to override the default installation directory for target libraries, otherwise known as $toolexeclibdir. This is so that it is possible to get newly-built libraries, particularly the shared ones, installed in a common place, so that they can be readily used by the target system as their host libraries, possibly over NFS, without a need to manually copy them over from the currently hardcoded location they would otherwise be installed in. In the presence of the `--enable-version-specific-runtime-libs' option and for configurations building native GCC the option is ignored. config/ * toolexeclibdir.m4: New file. gcc/ * doc/install.texi (Cross-Compiler-Specific Options): Document `--with-toolexeclibdir' option. libada/ * Makefile.in (configure_deps): Add `toolexeclibdir.m4'. * configure.ac: Handle `--with-toolexeclibdir='. * configure: Regenerate. libatomic/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. libffi/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * include/Makefile.in: Regenerate. * man/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. libgcc/ * Makefile.in (configure_deps): Add `toolexeclibdir.m4'. * configure.ac: Handle `--with-toolexeclibdir='. * configure: Regenerate. libgfortran/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libgomp/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. libhsail-rt/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libitm/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. libobjc/ * Makefile.in (aclocal_deps): Add `toolexeclibdir.m4'. * aclocal.m4: Include `toolexeclibdir.m4'. * configure.ac: Handle `--with-toolexeclibdir='. * configure: Regenerate. liboffloadmic/ * plugin/configure.ac: Handle `--with-toolexeclibdir='. * plugin/Makefile.in: Regenerate. * plugin/aclocal.m4: Regenerate. * plugin/configure: Regenerate. * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libphobos/ * m4/druntime.m4: Handle `--with-toolexeclibdir='. * m4/Makefile.in: Regenerate. * libdruntime/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libquadmath/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libsanitizer/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * asan/Makefile.in: Regenerate. * interception/Makefile.in: Regenerate. * libbacktrace/Makefile.in: Regenerate. * lsan/Makefile.in: Regenerate. * sanitizer_common/Makefile.in: Regenerate. * tsan/Makefile.in: Regenerate. * ubsan/Makefile.in: Regenerate. libssp/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libstdc++-v3/ * acinclude.m4: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: 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++17/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. libvtv/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. zlib/ * configure.ac: Handle `--with-toolexeclibdir='. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate.
2019-12-30VxWorks has_nanosleep for libstdc++ enable-libstdcxx-time autoCorentin Gay1-0/+5
2019-12-30 Corentin Gay <gay@adacore.com> * acinclude.m4 (vxworks*): New entry. Set ac_has_nanosleep=yes. * configure: Regenerate. From-SVN: r279796
2019-12-20libstdc++: Test setrlimit with c++ in configureJerome Lambourg1-0/+3
* acinclude.m4 (GLIBCXX_CHECK_SETRLIMIT): Test with AC_LANG_CPLUSPLUS. * configure: Regenerate. From-SVN: r279644
2019-12-20libstdc++: Strengthen the check for availability of pthread_rwlock_tJerome Lambourg1-10/+22
* acinclude.m4 (_GLIBCXX_USE_PTHREAD_RWLOCK_T): Checks that _PTHREADS is defined after including gthr.h. * configure: Regenerate. From-SVN: r279635
2019-12-02libstdc++: Add full steady_clock support to shared_timed_mutexMike Crowe1-0/+33
The pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock functions were added to glibc in v2.30. They have also been added to Android Bionic. If these functions are available in the C library then they can be used to implement shared_timed_mutex::try_lock_until, shared_timed_mutex::try_lock_for, shared_timed_mutex::try_lock_shared_until and shared_timed_mutex::try_lock_shared_for so that they are no longer unaffected by the system clock being warped. (This is the shared_mutex equivalent of PR libstdc++/78237 for mutex.) If the new functions are available then steady_clock is deemed to be the "best" clock available which means that it is used for the relative try_lock_for calls and absolute try_lock_until calls using steady_clock and user-defined clocks. It's not possible to have _GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK defined without _GLIBCXX_USE_PTHREAD_RWLOCK_T, so the requirement that the clock be the same as condition_variable is maintained. Calls explicitly using system_clock (aka high_resolution_clock) continue to use CLOCK_REALTIME via the old pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock functions. If the new functions are not available then system_clock is deemed to be the "best" clock available which means that the previous suboptimal behaviour remains. Additionally, the user-defined clock used with shared_timed_mutex::try_lock_for and shared_mutex::try_lock_shared_for may have higher precision than __clock_t. We may need to round the duration up to ensure that the timeout is long enough. (See __timed_mutex_impl::_M_try_lock_for) 2019-12-02 Mike Crowe <mac@mcrowe.com> Add full steady_clock support to shared_timed_mutex * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK): Define to check for the presence of both pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock. * config.h.in: Regenerate. * configure.ac: Call GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK. * configure: Regenerate. * include/std/shared_mutex (shared_timed_mutex): Define __clock_t as the best clock to use for relative waits. (shared_timed_mutex::try_lock_for) Round up wait duration if necessary. (shared_timed_mutex::try_lock_shared_for): Likewise. (shared_timed_mutex::try_lock_until): Use existing try_lock_until implementation for system_clock (which matches __clock_t when _GLIBCCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK is not defined). Add new overload for steady_clock that uses pthread_rwlock_clockwrlock if it is available. Simplify overload for non-standard clock to just call try_lock_for with a relative timeout. (shared_timed_mutex::try_lock_shared_until): Likewise. From-SVN: r278903
2019-12-02libstdc++: PR 78237 Add full steady_clock support to timed_mutexMike Crowe1-0/+31
The pthread_mutex_clocklock function is available in glibc since the 2.30 release. If this function is available in the C library it can be used to fix PR libstdc++/78237 by supporting steady_clock properly with timed_mutex. This means that code using timed_mutex::try_lock_for or timed_mutex::wait_until with steady_clock is no longer subject to timing out early or potentially waiting for much longer if the system clock is warped at an inopportune moment. If pthread_mutex_clocklock is available then steady_clock is deemed to be the "best" clock available which means that it is used for the relative try_lock_for calls and absolute try_lock_until calls using steady_clock and user-defined clocks. Calls explicitly using system_clock (aka high_resolution_clock) continue to use CLOCK_REALTIME via __gthread_cond_timedwait. If pthread_mutex_clocklock is not available then system_clock is deemed to be the "best" clock available which means that the previous suboptimal behaviour remains. 2019-12-02 Mike Crowe <mac@mcrowe.com> PR libstdc++/78237 Add full steady_clock support to timed_mutex * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK): Define to detect presence of pthread_mutex_clocklock function. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Call GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK. * include/std/mutex (__timed_mutex_impl): Remove unnecessary __clock_t. (__timed_mutex_impl::_M_try_lock_for): Use best clock to turn relative timeout into absolute timeout. (__timed_mutex_impl::_M_try_lock_until): Keep existing implementation for system_clock. Add new implementation for steady_clock that calls _M_clocklock. Modify overload for user-defined clock to use a relative wait so that it automatically uses the best clock. [_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK] (timed_mutex::_M_clocklock): New member function. (recursive_timed_mutex::_M_clocklock): Likewise. From-SVN: r278901
2019-11-30libstdc++: Default to --enable-libstdcxx-filesystem-ts for *-*-mingw*Jonathan Wakely1-0/+3
* acinclude.m4 (GLIBCXX_ENABLE_FILESYSTEM_TS): Enable by default for mingw targets. * configure: Regenerate. From-SVN: r278870
2019-09-10[ARM/FDPIC v6 24/24] [ARM] FDPIC: Handle arm*-*-uclinuxfdpiceabi in ↵Christophe Lyon1-3/+6
libstdc++ configure scripts 2019-09-10 Christophe Lyon <christophe.lyon@st.com> libstdc++-v3/ * acinclude.m4: Handle uclinux*. * configure: Regenerate. * configure.host: Handle uclinux* From-SVN: r275586
2019-09-04PR libstdc++/41861 Add full steady_clock support to condition_variableMike Crowe1-0/+31
The pthread_cond_clockwait function is available in glibc since the 2.30 release. If this function is available in the C library it can be used to fix PR libstdc++/41861 by supporting std::chrono::steady_clock properly with std::condition_variable. This means that code using std::condition_variable::wait_for or std::condition_variable::wait_until with std::chrono::steady_clock is no longer subject to timing out early or potentially waiting for much longer if the system clock is warped at an inopportune moment. If pthread_cond_clockwait is available then std::chrono::steady_clock is deemed to be the "best" clock available which means that it is used for the relative wait_for calls and absolute wait_until calls using user-defined clocks. Calls explicitly using std::chrono::system_clock continue to use CLOCK_REALTIME via __gthread_cond_timedwait. If pthread_cond_clockwait is not available then std::chrono::system_clock is deemed to be the "best" clock available which means that the previous suboptimal behaviour remains. 2019-09-04 Mike Crowe <mac@mcrowe.com> PR libstdc++/41861 * acinclude.m4 (GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT): Check for new pthread_cond_clockwait function. * configure.ac: Use GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT. * configure: Regenerate. * config.h.in: Regenerate. * include/std/condition_variable: (condition_variable): Rename __steady_clock_t typedef and add system_clock. Change __clock_t to be a typedef for the preferred clock to convert arbitrary other clocks to. [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (wait_until): Add a steady_clock overload. (wait_until): Change __clock_t overload to use system_clock. [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (__wait_until_impl): Add steady_clock overload that calls pthread_cond_clockwait. (__wait_until_impl): Change __clock_t overload to use system_clock. (condition_variable_any) [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT]: Use steady_clock for __clock_t if pthread_cond_clockwait is available. From-SVN: r275390
2019-09-03re PR other/79543 (Inappropriate "ld --version" checking)Chung-Lin Tang1-1/+1
2019-09-03 Chung-Lin Tang <cltang@codesourcery.com> libatomic/ PR other/79543 * acinclude.m4 (LIBAT_CHECK_LINKER_FEATURES): Fix GNU ld --version scanning to conform to the GNU Coding Standards. * configure: Regenerate. libffi/ PR other/79543 * acinclude.m4 (LIBAT_CHECK_LINKER_FEATURES): Fix GNU ld --version scanning to conform to the GNU Coding Standards. * configure: Regenerate. libgomp/ PR other/79543 * acinclude.m4 (LIBGOMP_CHECK_LINKER_FEATURES): Fix GNU ld --version scanning to conform to the GNU Coding Standards. * configure: Regenerate. libitm/ PR other/79543 * acinclude.m4 (LIBITM_CHECK_LINKER_FEATURES): Fix GNU ld --version scanning to conform to the GNU Coding Standards. * configure: Regenerate. libstdc++-v3/ PR other/79543 * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Fix GNU ld --version scanning to conform to the GNU Coding Standards. * configure: Regenerate. From-SVN: r275341
2019-08-29PR libstdc++/91067 add more missing exports for directory iteratorsJonathan Wakely1-1/+1
PR libstdc++/91067 * acinclude.m4 (libtool_VERSION): Bump to 6:28:0. * configure: Regenerate. * config/abi/pre/gnu.ver (GLIBCXX_3.4.28): Add new version. Export missing symbols. * testsuite/27_io/filesystem/iterators/91067.cc: Test move constructors. * testsuite/util/testsuite_abi.cc: Add new symbol version. From-SVN: r275032
2019-07-03PR libstdc++/91067 fix missing exports for filesystem iteratorsJonathan Wakely1-1/+1
The copy assignment operator for recursive_directory_iterator was not exported despite being needed. The __shared_ptr default constructors are not needed when compiling with GCC but Clang requires them for -O1. PR libstdc++/91067 * acinclude.m4 (libtool_VERSION): Bump to 6:27:0. * configure: Regenerate. * config/abi/pre/gnu.ver (GLIBCXX_3.4.27): Add new version. Export missing symbols. * testsuite/27_io/filesystem/iterators/91067.cc: New test. * testsuite/util/testsuite_abi.cc: Add new symbol version. From-SVN: r273023
2019-06-20Skip libstdc++ debug build in early bootstrap stagesJonathan Wakely1-1/+13
As mentioned in PR 90770, this is a patch that Debian have been carrying for some time. The additional unoptimized copies of libstdc++ libs that get built during each stage are never going to be used, so don't bother building them. For a profiled bootstrap this means we won't train the compiler on the unoptimized library code with assertions enabled, but that doesn't seem like a big problem, as the same code has already been compiled once for the main libstdc++ library. * acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final stage of bootstrap. * configure: Regenerate. From-SVN: r272509
2019-05-29PR libstdc++/85494 use rdseed and rand_s in std::random_deviceJonathan Wakely1-0/+20
Add support for additional sources of randomness to std::random_device, to allow using RDSEED for Intel CPUs and rand_s for Windows. When supported these can be selected using the tokens "rdseed" and "rand_s". For *-w64-mingw32 targets the "default" token will now use rand_s, and for other i?86-*-* and x86_64-*-* targets it will try to use "rdseed" first, then "rdrand", and finally "/dev/urandom". To simplify the declaration of std::random_device in <bits/random.h> the constructors now unconditionally call _M_init instead of _M_init_pretr1, and the function call operator now unconditionally calls _M_getval. The library code now decides whether _M_init and _M_getval should use a real source of randomness or the mt19937 engine. Existing code compiled against old libstdc++ headers will still call _M_init_pretr1 and _M_getval_pretr1, but those functions now forward to _M_init and _M_getval if a real source of randomness is available. This means existing code compiled for mingw-w64 will start to use rand_s just by linking to a new libstdc++.dll. * acinclude.m4 (GLIBCXX_CHECK_X86_RDSEED): Define macro to check if the assembler supports rdseed. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Use GLIBCXX_CHECK_X86_RDSEED. * config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_CRT_RAND_S): Define. * doc/html/*: Regenerate. * doc/xml/manual/status_cxx2011.xml: Document new tokens. * include/bits/random.h (random_device::random_device()): Always call _M_init rather than _M_init_pretr1. (random_device::random_device(const string&)): Likewise. (random_device::operator()()): Always call _M_getval(). (random_device::_M_file): Replace first member of union with an anonymous struct, with _M_file as its first member. * src/c++11/random.cc [_GLIBCXX_X86_RDRAND] (USE_RDRAND): Define. [_GLIBCXX_X86_RDSEED] (USE_RDSEED): Define. (USE_MT19937): Define if none of the above are defined. (USE_POSIX_FILE_IO): Define. (_M_strtoul): Remove. [USE_RDSEED] (__x86_rdseed): Define new function. [_GLIBCXX_USE_CRT_RAND_S] (__winxp_rand_s): Define new function. (random_device::_M_init(const string&)): Initialize new union members. Add support for "rdseed" and "rand_s" tokens. Decide what the "default" token does according to which USE_* macros are defined. [USE_POSIX_FILE_IO]: Store a file descriptor. [USE_MT19937]: Forward to _M_init_pretr1 instead. (random_device::_M_init_pretr1(const string&)) [USE_MT19937]: Inline code from _M_strtoul. [!USE_MT19937]: Call _M_init, transforming the old default token or numeric tokens to "default". (random_device::_M_fini()) [USE_POSIX_FILE_IO]: Use close not fclose. (random_device::_M_getval()): Use new union members to obtain a random number from the stored function pointer or file descriptor. [USE_MT19937]: Obtain a value from the mt19937 engine. (random_device::_M_getval_pretr1()): Call _M_getval(). (random_device::_M_getentropy()) [USE_POSIX_FILE_IO]: Use _M_fd instead of fileno. [!USE_MT19937] (mersenne_twister): Do not instantiate when not needed. * testsuite/26_numerics/random/random_device/85494.cc: New test. From-SVN: r271740
2019-02-27PR libstdc++/89466 avoid slow xsltproc command in configureJonathan Wakely1-19/+28
Certain broken versions of xsltproc ignore the --nonet option and will attempt to fetch the docbook stylesheet from the WWW when it isn't in the local XML catalog. This patch checks for the local stylesheet directory first, and doesn't use xsltproc if no local stylesheets are found. Checking for the local directory is done using xmlcatalog if available, only checking the hardcoded list of directories if xmlcatalog fails. The right directory for Suse is added to the hardcoded list. This should avoid doing an xsltproc check that would need to download the stylesheet, so no network connection is made even if a broken xsltproc is present. PR libstdc++/89466 * acinclude.m4 (GLIBCXX_CONFIGURE_DOCBOOK): Reorder check for local stylesheet directories before check for xsltproc. Try to use xmlcatalog to find local stylesheet directory before trying hardcoded paths. Add path used by suse to hardcoded paths. Adjust xsltproc check to look for the same stylesheet as doc/Makefile.am uses. Don't use xsltproc if xmlcatalog fails to find a local stylesheet. * configure.ac: Check for xmlcatalog. * Makefile.in: Regenerate. * configure: Likewise. * doc/Makefile.in: Likewise. * include/Makefile.in: Likewise. * libsupc++/Makefile.in: Likewise. * po/Makefile.in: Likewise. * python/Makefile.in: Likewise. * src/Makefile.in: Likewise. * src/c++11/Makefile.in: Likewise. * src/c++17/Makefile.in: Likewise. * src/c++98/Makefile.in: Likewise. * src/filesystem/Makefile.in: Likewise. * testsuite/Makefile.in: Likewise. From-SVN: r269249
2019-01-07Fix build for systems without POSIX truncateJonathan Wakely1-0/+13
Older versions of newlib do not provide truncate so add a configure check for it, and provide a fallback definition. There were also some missing exports in the linker script, which went unnoticed because there are no tests for some functions. A new link-only test checks that every filesystem operation function is defined by the library. * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for truncate. * config.h.in: Regenerate. * config/abi/pre/gnu.ver: Order patterns for filesystem operations alphabetically and add missing entries for copy_symlink, hard_link_count, rename, and resize_file. * configure: Regenerate. * src/c++17/fs_ops.cc (resize_file): Remove #if so posix::truncate is used unconditionally. * src/filesystem/ops-common.h (__gnu_posix::truncate) [!_GLIBCXX_HAVE_TRUNCATE]: Provide fallback definition that only supports truncating to zero length. * testsuite/27_io/filesystem/operations/all.cc: New test. * testsuite/27_io/filesystem/operations/resize_file.cc: New test. From-SVN: r267647
2019-01-06PR libstdc++/86756 Move rest of std::filesystem to libstdc++.soJonathan Wakely1-0/+34
Move std::filesystem directory iterators and operations from libstdc++fs.a to main libstdc++ library. These components have many dependencies on OS support, which is not available on all targets. Some additional autoconf checks and conditional compilation is needed to ensure the files will build for all targets. Previously this code was not compiled without --enable-libstdcxx-filesystem-ts but the C++17 components should be available for all hosted builds. The tests for these components no longer need to link to libstdc++fs.a, but are not expected to pass on all targets. To avoid numerous failures on targets which are not expected to pass the tests (due to missing OS functionality) leave the dg-require-filesystem-ts directives in place for now. This will ensure the tests only run for builds where the filesystem-ts library is built, which presumably means some level of OS support is present. PR libstdc++/86756 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for utime and lstat and define _GLIBCXX_USE_UTIME and _GLIBCXX_USE_LSTAT. * config.h.in: Regenerate. * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Export symbols for remaining std::filesystem types and functions. * configure: Regenerate. * src/c++17/Makefile.am: Add C++17 filesystem sources. * src/c++17/Makefile.in: Regenerate. * src/c++17/cow-fs_dir.cc: Move src/filesystem/cow-std-dir.cc to here, and change name of included file. * src/c++17/cow-fs_ops.cc: Move src/filesystem/cow-std-ops.cc to here, and change name of included file. * src/c++17/fs_dir.cc: Move src/filesystem/std-dir.cc to here. Change path to dir-common.h. * src/c++17/fs_ops.cc: Move src/filesystem/std-ops.cc to here. Change path to ops-common.h. Disable -Wunused-parameter warnings. (internal_file_clock): Define unconditionally. [!_GLIBCXX_HAVE_SYS_STAT_H] (internal_file_clock::from_stat): Do not define. (do_copy_file, do_space): Move definitions to ops.common.h. (copy, file_size, hard_link_count, last_write_time, space): Only perform operation when _GLIBCXX_HAVE_SYS_STAT_H is defined, otherwise report an error. (last_write_time, read_symlink): Remove unused attributes from parameters. * src/filesystem/Makefile.am: Remove C++17 filesystem sources. * src/filesystem/Makefile.in: Regenerate. * src/filesystem/cow-std-dir.cc: Move to src/c++17/cow-fs_dir.cc. * src/filesystem/cow-std-ops.cc: Move to src/c++17/cow-fs_ops.cc. * src/filesystem/std-dir.cc: Move to src/c++17/fs_dir.cc. * src/filesystem/std-ops.cc: Move to src/c++17/fs_ops.cc. * src/filesystem/dir-common.h [!_GLIBCXX_HAVE_DIRENT_H]: Define dummy types and functions instead of using #error. * src/filesystem/dir.cc [!_GLIBCXX_HAVE_DIRENT_H]: Use #error. * src/filesystem/ops-common.h [!_GLIBCXX_USE_LSTAT] (lstat): Define in terms of stat. [!_GLIBCXX_HAVE_UNISTD_H]: Define dummy types and functions. (do_copy_file, do_space): Move definitions here from std-ops.cc. * src/filesystem/ops.cc: Adjust calls to do_copy_file and do_space to account for new namespace. * testsuite/27_io/filesystem/directory_entry/86597.cc: Remove -lstdc++fs from dg-options. * testsuite/27_io/filesystem/directory_entry/lwg3171.cc: Likewise. * testsuite/27_io/filesystem/file_status/1.cc: Likewise. * testsuite/27_io/filesystem/filesystem_error/cons.cc: Likewise. * testsuite/27_io/filesystem/filesystem_error/copy.cc: Likewise. * testsuite/27_io/filesystem/iterators/directory_iterator.cc: Likewise. * testsuite/27_io/filesystem/iterators/pop.cc: Likewise. * testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc: Likewise. * testsuite/27_io/filesystem/operations/absolute.cc: Likewise. * testsuite/27_io/filesystem/operations/canonical.cc: Likewise. * testsuite/27_io/filesystem/operations/copy.cc: Likewise. * testsuite/27_io/filesystem/operations/copy_file.cc: Likewise. * testsuite/27_io/filesystem/operations/create_directories.cc: Likewise. * testsuite/27_io/filesystem/operations/create_directory.cc: Likewise. * testsuite/27_io/filesystem/operations/create_symlink.cc: Likewise. * testsuite/27_io/filesystem/operations/current_path.cc: Likewise. * testsuite/27_io/filesystem/operations/equivalent.cc: Likewise. * testsuite/27_io/filesystem/operations/exists.cc: Likewise. * testsuite/27_io/filesystem/operations/file_size.cc: Likewise. * testsuite/27_io/filesystem/operations/is_empty.cc: Likewise. * testsuite/27_io/filesystem/operations/last_write_time.cc: Likewise. * testsuite/27_io/filesystem/operations/permissions.cc: Likewise. * testsuite/27_io/filesystem/operations/proximate.cc: Likewise. * testsuite/27_io/filesystem/operations/read_symlink.cc: Likewise. * testsuite/27_io/filesystem/operations/relative.cc: Likewise. * testsuite/27_io/filesystem/operations/remove.cc: Likewise. * testsuite/27_io/filesystem/operations/remove_all.cc: Likewise. * testsuite/27_io/filesystem/operations/space.cc: Likewise. * testsuite/27_io/filesystem/operations/status.cc: Likewise. * testsuite/27_io/filesystem/operations/symlink_status.cc: Likewise. * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Likewise. * testsuite/27_io/filesystem/operations/weakly_canonical.cc: Likewise. From-SVN: r267616
2018-11-27PR libstdc++/67843 set shared_ptr lock policy at build-timeJonathan Wakely1-0/+66
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
2018-10-16Define _GLIBCXX_USE_DEV_RANDOM as replacement for _GLIBCXX_USE_RANDOM_TR1Jonathan Wakely1-11/+15
Define and use a new macro with a more descriptive name. Only use the old macro in <tr1/random.h>. * acinclude.m4 (GLIBCXX_CHECK_RANDOM_TR1): Replace with ... (GLIBCXX_CHECK_DEV_RANDOM): New macro with more descriptive name. Define _GLIBCXX_USE_DEV_RANDOM as well as _GLIBCXX_USE_RANDOM_TR1. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Use GLIBCXX_CHECK_DEV_RANDOM instead of GLIBCXX_CHECK_RANDOM_TR1. crossconfig.m4: Likewise. * include/bits/random.h (random_device): Use _GLIBCXX_USE_DEV_RANDOM instead of _GLIBCXX_USE_RANDOM_TR1. * testsuite/26_numerics/random/random_device/cons/token.cc: Likewise. From-SVN: r265197
2018-07-25Add new src/c++17 directory to list in acinclude.m4Jonathan Wakely1-1/+1
* acinclude.m4 (glibcxx_SUBDIRS): Add src/c++17. * src/Makefile.am: Add comment. * src/c++17/Makefile.in: Regenerate. From-SVN: r262964
2018-07-17PR libstdc++/86450 use -Wabi=2 and simplify -Werror useJonathan Wakely1-9/+1
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
2018-06-21PR libstdc++/83328 add correct basic_string::insert for initializer_listJonathan Wakely1-1/+1
The SSO basic_string has a non-standard insert(iterator, initializer_list) overload, from a C++0x draft. This adds the correct overload, while also preserving the old one so that the old symbol is still exported from the library. The COW basic_string doesn't have any of the C++11 changes to the insert overloads (they all still have non-const iterator parameters and the ones that should return an iterator still return void). This doesn't make any change to the COW string. PR libstdc++/83328 * acinclude.m4 (libtool_VERSION): Bump to 6:26:0. * config/abi/pre/gnu.ver: Add GLIBCXX_3.4.26 and export new symbol. * configure: Regenerate. * include/bits/basic_string.h [_GLIBCXX_USE_CXX11_ABI] (basic_string::insert(const_iterator, initializer_list<C>)): Add. [_GLIBCXX_USE_CXX11_ABI && !_GLIBCXX_DEFINING_STRING_INSTANTIATIONS] (basic_string::insert(iterator, initializer_list<C>)): Suppress definition. * include/debug/string (basic_string::insert(iterator, C)): Change first parameter to const_iterator. (basic_string::insert(iterator, size_type, C)): Likewise. Change return type to iterator. (basic_string::insert(iterator, InputIterator, InputIterator)): Likewise. (basic_string::insert(iterator, initializer_list<C>)): Change first parameter to const_iterator and return type to iterator. * src/c++11/string-inst.cc: Extend comment. * testsuite/21_strings/basic_string/modifiers/insert/char/83328.cc: New. * testsuite/21_strings/basic_string/modifiers/insert/wchar_t/83328.cc: New. * testsuite/util/testsuite_abi.cc: Add new symbol version. From-SVN: r261866
2018-06-18Fix bootstrap failure for bare metal due to autoconf link testsJonathan Wakely1-126/+177
The AC_CHECK_FUNCS tests cause the build to fail for bare metal cross compilers, where link tests are not allowed. Replace them with GCC_TRY_COMPILE_OR_LINK tests instead. Skip all the Filesystem dependency checks if not building the filesystem library. * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Only check when enable_libstdcxx_filesystem_ts = yes. Check for link, readlink and symlink. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Remove AC_CHECK_FUNCS for link, readlink and symlink. From-SVN: r261704
2018-05-01PR libstdc++/84654 Disable __float128 specializations for -mno-float128Tulio Magno Quites Machado Filho1-3/+2
2018-05-01 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> PR libstdc++/84654 * acinclude.m4: Set ENABLE_FLOAT128 instead of _GLIBCXX_USE_FLOAT128. * config.h.in: Remove references to _GLIBCXX_USE_FLOAT128. * configure: Regenerate. * include/Makefile.am: Replace the value of _GLIBCXX_USE_FLOAT128 based on ENABLE_FLOAT128. * include/Makefile.in: Regenerate. * include/bits/c++config: Define _GLIBCXX_USE_FLOAT128. [!defined(__FLOAT128__) && !defined(__SIZEOF_FLOAT128__)]: Undefine _GLIBCXX_USE_FLOAT128. From-SVN: r259813
2017-11-21RTEMS: Enable some libstdc++ featuresSebastian Huber1-1/+4
libstdc++/ * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Add rtems*. (GLIBCXX_ENABLE_FILESYSTEM_TS): Likewise. * configure: Regenerate. From-SVN: r254985
2017-11-17Enable building libstdc++-v3 with Intel CETIgor Tsimbalist1-0/+1
libstdc++-v3/ * acinclude.m4: Add cet.m4. * configure.ac: Set CET_FLAGS. Update EXTRA_CFLAGS, EXTRA_CXX_FLAGS. * libsupc++/Makefile.am: Use Add EXTRA_CFLAGS. * Makefile.in: Regenerate. * configure: Likewise. * doc/Makefile.in: Likewise. * include/Makefile.in: Likewise. * libsupc++/Makefile.in: Likewise. * po/Makefile.in: Likewise. * python/Makefile.in: Likewise. * src/Makefile.in: Likewise. * src/c++11/Makefile.in: Likewise. * src/c++98/Makefile.in: Likewise. * src/filesystem/Makefile.in: Likewise. * testsuite/Makefile.in: Likewise. From-SVN: r254895
2017-06-16PR libstdc++/81092 add std::wstring symbols and bump library versionJonathan Wakely1-1/+1
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
2017-05-23PR libstdc++/67578 Implement non-trivial std::random_device::entropyXi Ruoyao1-1/+1
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
2017-05-10Bump version namespace.François Dumont1-1/+1
2017-05-10 François Dumont <fdumont@gcc.gnu.org> Bump version namespace. * config/abi/pre/gnu-versioned-namespace.ver: Bump version namespace from __7 to __8. Bump GLIBCXX_7.0 to GLIBCXX_8.0. * acinclude.m4 (libtool_VERSION): Bump to 8:0:0. * include/bits/c++config: Adapt. * include/bits/regex.h: Adapt. * include/experimental/bits/fs_fwd.h: Adapt. * include/experimental/bits/lfts_config.h: Adapt. * include/std/variant: Adapt. * python/libstdcxx/v6/printers.py: Adapt. * testsuite/libstdc++-prettyprinters/48362.cc: Adapt. * include/bits/stl_tree.h (_Rb_tree_impl<>): Remove _Is_pod_comparator template parameter when version namespace is active. From-SVN: r247858
2017-03-15Fix typo in config.h.in commentJonathan Wakely1-1/+1
* acinclude.m4 (GLIBCXX_CHECK_S_ISREG_OR_S_IFREG): Fix typo in comment. * config.h.in: Regenerate. * configure: Regenerate. * doc/Makefile.in: Regenerate. From-SVN: r246165
2017-03-10[libstdc++-v3] Fix detection of obsolete isnanGeorge Lander1-1/+2
libstdc++-v3 configure checks whether old glibc inline definitions of isnan would conflict with the libstdc++-v3 definitions and works around them if so. But if g++ 6.x build A is used to build another g++ 6.x B, the configure step for B will pick up the math.h installed alongside A instead of the glibc version. configure will then assume that the workaround isn't necessary, leaving B with a broken cmath. isinf already worked around this. This patch extends the same fix to isnan. (Thanks to George for the fix.) libstdc++-v3/ 2017-03-10 George Lander <george.lander@arm.com> * acinclude.m4 (glibcxx_cv_obsolete_isnan): Define _GLIBCXX_INCLUDE_NEXT_C_HEADERS before including math.h. * configure: Regenerate. From-SVN: r246025
2017-01-20Support unsigned __int20 in checks for size_t manglingJoe Seymour1-2/+6
2017-01-20 Joe Seymour <joe.s@somniumtech.com> * acinclude.m4 (GLIBCXX_CHECK_SIZE_T_MANGLING): Support uint20_t. * configure: Regenerate. From-SVN: r244727
2017-01-09PR79017 workaround incomplete C99 math on darwinJonathan Wakely1-0/+25
PR libstdc++/79017 * acinclude.m4 (GLIBCXX_CHECK_C99_TR1): Check for llrint and llround functions separately on darwin and if they're missing define _GLIBCXX_NO_C99_ROUNDING_FUNCS. * config.h.in: Regenerate. * configure: Regenerate. * include/c_global/cmath [_GLIBCXX_NO_C99_ROUNDING_FUNCS] (llrint) (llrintf, llrintl, llround, llroundf, llroundl): Do not define. From-SVN: r244231
2017-01-06Build libgo with -Wa,-nH if possible (PR go/78978) [non-libgo parts]Rainer Orth1-32/+0
libstdc++-v3: PR go/78978 * acinclude.m4 (GLIBCXX_CHECK_ASSEMBLER_HWCAP): Remove. * configure.ac: Call GCC_CHECK_ASSEMBLER_HWCAP instead of GLIBCXX_CHECK_ASSEMBLER_HWCAP. * fragment.am (CONFIG_CXXFLAGS): Use HWCAP_CFLAGS instead of HWCAP_FLAGS. * aclocal.m4: Regenerate. * configure: Regenerate. * Makefile.in, 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++98/Makefile.in, src/filesystem/Makefile.in, testsuite/Makefile.in: Regenerate. config: PR go/78978 * hwcaps.m4 (GCC_CHECK_ASSEMBLER_HWCAP): New macro. From-SVN: r244162
2017-01-04Support exception propagation without lock-free atomic intPauli Nieminen1-0/+37
2017-01-04 Pauli Nieminen <suokkos@gmail.com> Jonathan Wakely <jwakely@redhat.com> PR libstdc++/64735 * acinclude.m4 (GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER): Define. * config.h.in: Regenerate. * config/abi/pre/gnu.ver [HAVE_EXCEPTION_PTR_SINCE_GCC46] (GLIBCXX_3.4.15, GLIBCXX_3.4.21, CXXABI_1.3.3, CXXABI_1.3.5): Make exports for exception_ptr, nested_exception, and future conditional. [HAVE_EXCEPTION_PTR_SINCE_GCC46] (GLIBCXX_3.4.23, CXXABI_1.3.11): Add exports for exception_ptr, nested_exception, and future conditional. * configure: Regenerate. * configure.ac: Use GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER. * include/std/future: Remove check for ATOMIC_INT_LOCK_FREE * libsupc++/eh_atomics.h: New file for internal use only. (__eh_atomic_inc, __eh_atomic_dec): New. * libsupc++/eh_ptr.cc (exception_ptr::_M_addref) (exception_ptr::_M_release) (__gxx_dependent_exception_cleanup) (rethrow_exception): Use eh_atomics.h reference counting helpers. * libsupc++/eh_throw.cc (__gxx_exception_cleanup): Likewise. * libsupc++/eh_tm.cc (free_any_cxa_exception): Likewise. * libsupc++/exception: Remove check for ATOMIC_INT_LOCK_FREE. * libsupc++/exception_ptr.h: Likewise. * libsupc++/guard.cc: Include header for ATOMIC_INT_LOCK_FREE macro. * libsupc++/nested_exception.cc: Remove check for ATOMIC_INT_LOCK_FREE. * libsupc++/nested_exception.h: Likewise. * src/c++11/future.cc: Likewise. * testsuite/18_support/exception_ptr/*: Remove atomic builtins checks. * testsuite/18_support/nested_exception/*: Likewise. * testsuite/30_threads/async/*: Likewise. * testsuite/30_threads/future/*: Likewise. * testsuite/30_threads/headers/future/types_std_c++0x.cc: Likewise. * testsuite/30_threads/packaged_task/*: Likewise. * testsuite/30_threads/promise/*: Likewise. * testsuite/30_threads/shared_future/*: Likewise. Co-Authored-By: Jonathan Wakely <jwakely@redhat.com> From-SVN: r244051
2016-11-21Don't define libstdc++-internal macros in Solaris 10+ <math.h>Rainer Orth1-13/+66
libstdc++-v3: * acinclude.m4 (GLIBCXX_CHECK_MATH11_PROTO): Update comments. (__CORRECT_ISO_CPP11_MATH_H_PROTO): Rename to ... (__CORRECT_ISO_CPP11_MATH_H_PROTO_FP): ... this. Add test for C++11 <math.h> integral overloads. * configure: Regenerate. * config.h.in: Regenerate. * include/c_global/cmath [__cplusplus >= 201103L]: Reflect __CORRECT_ISO_CPP11_MATH_H_PROTO to __CORRECT_ISO_CPP11_MATH_H_PROTO_FP rename. * include/c_global/cmath [_GLIBCXX_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC && __cplusplus >= 201103L] (std::fpclassify): Wrap in !__CORRECT_ISO_CPP11_MATH_H_PROTO_INT. (std::isfinite): Likewise. (std::isinf): Likewise. (std::isnan): Likewise. (std::isnormal): Likewise. (std::signbit): Likewise. (std::isgreater): Likewise. (std::isgreaterequal): Likewise. (std::isless): Likewise. (std::islessequal): Likewise. (std::islessgreater): Likewise. (std::isunordered): Likewise. [__cplusplus >= 201103L && _GLIBCXX_USE_C99_MATH_TR1] (std::acosh): Likewise. (std::asinh): Likewise. (std::atanh): Likewise. (std::cbrt): Likewise. (std::copysign): Likewise. (std::erf): Likewise. (std::erfc): Likewise. (std::exp2): Likewise. (std::expm1): Likewise. (std::fdim): Likewise. (std::fma): Likewise. (std::fmax): Likewise. (std::fmin): Likewise. (std::hypot): Likewise. (std::ilogb): Likewise. (std::lgamma): Likewise. (std::llrint): Likewise. (std::llround): Likewise. (std::log1p): Likewise. (std::log2): Likewise. (std::logb): Likewise. (std::lrint): Likewise. (std::lround): Likewise. (std::nearbyint): Likewise. (std::nextafter): Likewise. (std::nexttoward): Likewise. (std::remainder): Likewise. (std::remquo): Likewise. (std::rint): Likewise. (std::round): Likewise. (std::scalbln): Likewise. (std::scalbn): Likewise. (std::tgamma): Likewise. (std::trunc): Likewise. * include/tr1/cmath [_GLIBCXX_USE_C99_MATH_TR1 && __cplusplus >= 201103L]: Reflect __CORRECT_ISO_CPP11_MATH_H_PROTO to __CORRECT_ISO_CPP11_MATH_H_PROTO_FP rename. fixincludes: * inclhack.def (solaris_math_12): New fix. (hpux11_fabsf): Replace bypass by *-hp-hpux11* mach selector. * fixincl.x: Regenerate. * tests/base/math.h [SOLARIS_MATH_12_CHECK]: New test. From-SVN: r242671
2016-10-26Add missing header in Filesystem TS configure testsUros Bizjak1-0/+1
2016-10-26 Uros Bizjak <ubizjak@gmail.com> * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Include <limits.h> for PATH_MAX in realpath test. * configure: Regenerate. From-SVN: r241548
2016-09-30libstdc++/77795 Only declare ::gets for C++98 and C++11Jonathan Wakely1-1/+6
PR libstdc++/77795 * acinclude.m4 (GLIBCXX_CHECK_STDIO_PROTO): Use -std=gnu++11 to check for gets. * config.h.in: Regenerate. * configure: Regenerate. * include/c_global/cstdio [!_GLIBCXX_HAVE_GETS] (gets): Only declare for C++98 and C++11. * include/c_std/cstdio [!_GLIBCXX_HAVE_GETS] (gets): Likewise. * testsuite/27_io/headers/cstdio/functions_neg.cc: New test. From-SVN: r240672
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