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2022-10-29libstdc++: Don't use gstdint.h anymoreArsen Arsenović1-859/+8
libstdc++-v3/ChangeLog: * configure.ac: Stop generating gstdint.h. * src/c++11/compatibility-atomic-c++0x.cc: Stop using gstdint.h. * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * config.h.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++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * src/libbacktrace/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate.
2022-10-21libstdc++: respect with-{headers, newlib} for default hosted valueArsen Arsenović1-7/+10
This saves us a build flag when building for freestanding targets. libstdc++-v3/ChangeLog: * acinclude.m4: Default hosted to off if building without headers and without newlib. * configure: Regenerate.
2022-10-19gcc: Add 'mcf' thread model support from mcfgthreadLIU Hao1-6/+7
This patch adds the new thread model `mcf`, which implements mutexes and condition variables with the mcfgthread library. Source code for mcfgthread is available at <https://github.com/lhmouse/mcfgthread>. config/ChangeLog: * gthr.m4 (GCC_AC_THREAD_HEADER): Add new case for `mcf` thread model gcc/ChangeLog: * config/i386/mingw-mcfgthread.h: New file * config/i386/mingw32.h: Add builtin macro and default libraries for mcfgthread when thread model is `mcf` * config.gcc: Include 'i386/mingw-mcfgthread.h' when thread model is `mcf` * configure.ac: Recognize `mcf` as a valid thread model * config.in: Regenerate * configure: Regenerate libatomic/ChangeLog: * configure.tgt: Add new case for `mcf` thread model libgcc/ChangeLog: * config.host: Add new cases for `mcf` thread model * config/i386/gthr-mcf.h: New file * config/i386/t-mingw-mcfgthread: New file * config/i386/t-slibgcc-cygming: Add mcfgthread for libgcc DLL * configure: Regenerate libstdc++-v3/ChangeLog: * libsupc++/atexit_thread.cc (__cxa_thread_atexit): Use implementation from mcfgthread if available * libsupc++/guard.cc (__cxa_guard_acquire, __cxa_guard_release, __cxa_guard_abort): Use implementations from mcfgthread if available * configure: Regenerate
2022-10-12regenerate configure filesMartin Liska1-8/+8
Needed after a recent change. gcc/ChangeLog: * configure: Regenerate. libatomic/ChangeLog: * configure: Regenerate. libbacktrace/ChangeLog: * configure: Regenerate. libcc1/ChangeLog: * configure: Regenerate. libffi/ChangeLog: * configure: Regenerate. libgfortran/ChangeLog: * configure: Regenerate. libgomp/ChangeLog: * configure: Regenerate. libitm/ChangeLog: * configure: Regenerate. libobjc/ChangeLog: * configure: Regenerate. liboffloadmic/ChangeLog: * configure: Regenerate. * plugin/configure: Regenerate. libphobos/ChangeLog: * configure: Regenerate. libquadmath/ChangeLog: * configure: Regenerate. libsanitizer/ChangeLog: * configure: Regenerate. libssp/ChangeLog: * configure: Regenerate. libstdc++-v3/ChangeLog: * configure: Regenerate. libvtv/ChangeLog: * configure: Regenerate. lto-plugin/ChangeLog: * configure: Regenerate. zlib/ChangeLog: * configure: Regenerate.
2022-10-11libstdc++: Allow emergency EH alloc pool size to be tuned [PR68606]Jonathan Wakely1-8/+59
Implement a long-standing request to support tuning the size of the emergency buffer for allocating exceptions after malloc fails, or to disable that buffer entirely. It's now possible to disable the dynamic allocation of the buffer and use a fixed-size static buffer, via --enable-libstdcxx-static-eh-pool. This is a built-time choice that is baked into libstdc++ and so affects all code linked against that build of libstdc++. The size of the pool can be set by --with-libstdcxx-eh-pool-obj-count=N which is measured in units of sizeof(void*) not bytes. A given exception type such as std::system_error depends on the target, so giving a size in bytes wouldn't be portable across 16/32/64-bit targets. When libstdc++ is configured to use a dynamic buffer, the size of that buffer can now be tuned at runtime by setting the GLIBCXX_TUNABLES environment variable (c.f. PR libstdc++/88264). The number of exceptions to reserve space for is controlled by the "glibcxx.eh_pool.obj_count" and "glibcxx.eh_pool.obj_size" tunables. The pool will be sized to be able to allocate obj_count exceptions of size obj_size*sizeof(void*) and obj_count "dependent" exceptions rethrown by std::rethrow_exception. With the ability to tune the buffer size, we can reduce the default pool size on 32-bit and 16-bit targets. Most users never need to throw 1kB exceptions in parallel from hundreds of threads after malloc is OOM. The users who do need that can use the tunables to select larger sizes. The old defaults can be chosen at runtime by setting GLIBCXX_TUNABLES to: 64-bit: glibcxx.eh_pool.obj_count=64:glibcxx.eh_pool.obj_size=112 32-bit: glibcxx.eh_pool.obj_count=32:glibcxx.eh_pool.obj_size=104 Or approximated by configuring with: 64-bit: --with-libstdcxx-eh-pool-obj-count=252 32-bit: --with-libstdcxx-eh-pool-obj-count=94 libstdc++-v3/ChangeLog: PR libstdc++/68606 * Makefile.in: Regenerate. * acinclude.m4 (GLIBCXX_EMERGENCY_EH_ALLOC): New macro. * configure: Regenerate. * configure.ac: Use GLIBCXX_EMERGENCY_EH_ALLOC. * crossconfig.m4: Check for secure_getenv. * doc/Makefile.in: Regenerate. * doc/xml/manual/configure.xml: Document new configure options. * doc/xml/manual/evolution.xml: Document addition of tunables. * doc/xml/manual/using_exceptions.xml: Document emergency buffer and tunables. * doc/html/*: Regenerate. * include/Makefile.in: Regenerate. * libsupc++/Makefile.am: Use EH_POOL_FLAGS. * libsupc++/Makefile.in: Regenerate. * libsupc++/eh_alloc.cc (EMERGENCY_OBJ_SIZE): Define in units of sizeof(void*) not including the ABI's exception header. (EMERGENCY_OBJ_COUNT): Define as target-independent calculation based on word size. (MAX_OBJ_COUNT): Define macro for upper limit on pool size. (pool) [_GLIBCXX_EH_POOL_STATIC]: Use fixed-size buffer. (pool::buffer_size_in_bytes): New static member function. (pool::pool): Parse GLIBCXX_TUNABLES environment variable to set pool size at runtime. (pool::in_pool): Use std::less<void*> for total order. (__freeres) [_GLIBCXX_EH_POOL_STATIC]: Do nothing. (__cxa_free_exception, __cxa_free_dependent_exception): Add [[unlikely]] attributes. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * src/libbacktrace/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate.
2022-10-11Generic configury support for shared libs on VxWorksOlivier Hainque1-2/+46
This change adds the configury bits to activate the build of shared libs on VxWorks ports configured with --enable-shared, for libraries variants where this is generally supported (rtp, code model !large - currently not compatible with -fPIC). Set lt_cv_deplibs_check_method in libtool.m4, so the build of libraries know how to establish dependencies. This is useful in configurations such as aarch64 where proper support of LSE relies on accurate dependency information between libstdc++ and libgcc_s to begin with. Regenerate configure scripts to reflect libtool.m4 change. 2022-10-09 Olivier Hainque <hainque@adacore.com> * libtool.m4 (*vxworks*): When enable_shared, set dynamic_linker and friends for rtp !large. Assume the linker has the required abilities and set lt_cv_deplibs_check_method. gcc/ * config.gcc (*vxworks*): Add t-slibgcc fragment if enable_shared. libgcc/ * config.host (*vxworks*): When enable_shared, add libgcc and crtstuff "shared" fragments for rtp except large code model. (aarch64*-wrs-vxworks7*): Remove t-slibgcc-libgcc from the list of fragments. 2022-10-09 Olivier Hainque <hainque@adacore.com> gcc/ * configure: Regenerate. libatomic/ * configure: Regenerate. libbacktrace/ * configure: Regenerate. libcc1/ * configure: Regenerate. libffi/ * configure: Regenerate. libgfortran/ * configure: Regenerate. libgomp/ * configure: Regenerate. libitm/ * configure: Regenerate. libobjc/ * configure: Regenerate. liboffloadmic/ * configure: Regenerate. liboffloadmic/ * plugin/configure: Regenerate. libphobos/ * configure: Regenerate. libquadmath/ * configure: Regenerate. libsanitizer/ * configure: Regenerate. libssp/ * configure: Regenerate. libstdc++-v3/ * configure: Regenerate. libvtv/ * configure: Regenerate. lto-plugin/ * configure: Regenerate. zlib/ * configure: Regenerate.
2022-10-07libstdc++: Add --disable-libstdcxx-hosted as an alias for hosted-libstdcxxJonathan Wakely1-9/+28
Most libstdc++ configure args are of the form --enable-libstdcxx-xxx but the option to build freestanding is --disable-hosted-libstdcxx. If you accidentally type --disable-libstdcxx-hosted then it will be ignored. This adds --disable-libstdcxx-hosted as an alias for the existing arg, so it works whichever way you say it. If both args are used explicitly and their values do not agree, configure fails with an error. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_HOSTED): Add libstdcxx-hosted enable arg as an alias for hosted-libstdcxx enable arg. * configure: Regenerate.
2022-10-03libstdc++: Filter out unconditional <stdio.h> default includeArsen Arsenović1-8/+17
_AC_INCLUDES_DEFAULT_REQUIREMENTS including <stdio.h> when checking for stdint.h has prevented proper detection of whether stdint.h is present, since it'd poison the cache variables with test results failing due to <stdio.h> failing to include. As a solution, for autoconf versions under 2.70, we filter out that bit of code from ac_includes_default. This issue was fixed in autoconf-2.70. This also applies to various other headers, but was noticed when looking into why HAVE_STDINT_H was misdefined. libstdc++-v3/ChangeLog: * configure.ac: Remove any lines that unconditionally include <stdio.h> from ac_includes_default, when running Autoconf <2.70. * configure: Regenerate.
2022-10-03libstdc++: Make _GLIBCXX_HOSTED respect -ffreestanding [PR103626]Jonathan Wakely1-1/+1
This allows the library to switch to freestanding mode when compiling with the -ffreestanding flag. This means you don't need a separate libstdc++ build configured with --disable-hosted-libstdcxx in order to compile for a freestanding environment. The testsuite support files cannot be compiled for freestanding, so add -fno-freestanding to override any -ffreestanding in the test flags. libstdc++-v3/ChangeLog: PR libstdc++/103626 * acinclude.m4 (GLIBCXX_ENABLE_HOSTED): Define _GLIBCXX_HOSTED to __STDC_HOSTED__ for non-freestanding installations. * configure: Regenerate. * include/Makefile.am (${host_builddir}/c++config.h): Adjust grep pattern. * include/Makefile.in: Regenerate. * testsuite/lib/libstdc++.exp (v3-build_support): Use -fno-freestanding. * testsuite/libstdc++-abi/abi.exp: Likewise.
2022-09-12libstdc++: Outline the overlapping case of string _M_replace into a separate ↵Jakub Jelinek1-1/+1
function [PR105329] The following patch is partially a workaround for bogus warnings when the compiler isn't able to fold _M_disjunct call into constant false, but also an optimization attempt - assuming _M_disjunct (__s) is rare, the patch should shrink code size for the common case and use library or for non-standard instantiations an out of line function to handle the rare case. 2022-09-12 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/105329 * acinclude.m4 (libtool_VERSION): Change to 6:31:0. * config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Don't export std::basic_string methods with name length of 15. (GLIBCXX_3.4.31): Export std::basic_string::_M_replace_cold. * testsuite/util/testsuite_abi.cc (check_version): Handle GLIBCXX_3.4.31. * include/bits/basic_string.h (std::basic_string::_M_replace_cold): Declare. * include/bits/basic_string.tcc (std::basic_string::_M_replace_cold): Define and export even for C++20. (std::basic_string::_M_replace): Use __builtin_expect, outline the overlapping case to _M_replace_cold. * configure: Regenerated.
2022-08-3132-bit PA-RISC with HP-UX: remove deprecated portsMartin Liska1-14/+0
ChangeLog: * configure: Regenerate. * configure.ac: Delete hpux9 and hpux10. config/ChangeLog: * mh-pa-hpux10: Removed. contrib/ChangeLog: * config-list.mk: Remove deprecated ports. contrib/header-tools/ChangeLog: * README: Remove deprecated ports. * reduce-headers: Likewise. gcc/ChangeLog: * config.build: Remove deprecated ports. * config.gcc: Likewise. * config.host: Likewise. * configure.ac: Likewise. * configure: Regenerate. * config/pa/pa-hpux10.h: Removed. * config/pa/pa-hpux10.opt: Removed. * config/pa/t-dce-thr: Removed. gnattools/ChangeLog: * configure.ac: Remove deprecated ports. * configure: Regenerate. libstdc++-v3/ChangeLog: * configure: Regenerate. * crossconfig.m4: Remove deprecated ports. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/lambda/lambda-conv.C: Remove useless test. * gcc.c-torture/execute/ieee/hugeval.x: Likewise. * gcc.dg/torture/pr47917.c: Likewise. * lib/target-supports.exp: Likewise. libgcc/ChangeLog: * config.host: Remove hppa. libitm/ChangeLog: * configure: Regenerate. fixincludes/ChangeLog: * configure: Regenerate.
2022-07-19RTEMS: Remove HAVE_POLL for libstdc++Sebastian Huber1-2/+0
The poll() function is not always available in RTEMS. libstdc++-v3/ChangeLog: * configure: Regnerate. * configure.ac (newlib, *-rtems*): Remove HAVE_POLL.
2022-07-01Enable some features for RTEMS in libstdc++Sebastian Huber1-5973/+39
Remove RTEMS support from crossconfig.m4 since this code is not used due to "with_newlib" being "yes". libstdc++-v3/ChangeLog: * configure: Regnerate. * configure.ac (newlib, *-rtems*): Enable TLS support for all RTEMS targets except bfin, lm32, mips, moxie, or1k, and v850. For all RTEMS targets, define HAVE_ALIGNED_ALLOC, HAVE_AT_QUICK_EXIT, HAVE_LINK, HAVE_POLL, HAVE_QUICK_EXIT, HAVE_READLINK, HAVE_SETENV, HAVE_SLEEP, HAVE_SOCKATMARK, HAVE_STRERROR_L, HAVE_SYMLINK, HAVE_TRUNCATE, and HAVE_USLEEP. * crossconfig.m4 (*-rtems*): Remove.
2022-06-23libstdc++: check for openatAlexandre Oliva1-0/+55
rtems6.0 has fdopendir, and fcntl.h defines AT_FDCWD and declares openat, but there's no openat in libc. Adjust dir-common.h to not assume ::openat just because of AT_FDCWD. for libstdc++-v3/ChangeLog * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for openat. * configure, config.h.in: Rebuilt. * src/filesystem/dir-common.h (openat): Use ::openat if _GLIBCXX_HAVE_OPENAT. * src/filesystem/dir.cc (dir_and_pathname): Use dirfd if _GLIBCXX_HAVE_OPENAT.
2022-04-19libstdc++: Fix syntax error in libbacktrace configurationJonathan Wakely1-3/+3
Using == instead of = causes a configuration error with dash as the shell: checking whether to build libbacktrace support... /home/devel/building/work/src/gcc-12-20220417/libstdc++-v3/configure: 77471: test: auto: unexpected operator /home/devel/building/work/src/gcc-12-20220417/libstdc++-v3/configure: 77474: test: auto: unexpected operator auto This means we fail to change the value from "auto" to "no" and so this test passes: GLIBCXX_CONDITIONAL(ENABLE_BACKTRACE, [test "$enable_libstdcxx_backtrace" != no]) This leads to the libbacktrace directory being included in the build without being configured properly, and bootstrap fails. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Fix shell operators. * configure: Regenerate.
2022-04-14libstdc++: Default to mutex-based atomics on RISC-VPalmer Dabbelt1-2/+5
The RISC-V port requires libatomic to be linked in order to resolve various atomic functions, which results in builds that have "--with-libstdcxx-lock-policy=auto" defaulting to mutex-based locks. Changing this to direct atomics breaks the ABI, this forces the auto detection mutex-based atomics on RISC-V in order to avoid a silent ABI break for users. See Bug 84568 for more discussion. In the long run there may be a way to get the higher-performance atomics without an ABI flag day, but that's going to be a much more complicated operation. We don't even have support for the inline atomics yet, but given that some folks have been discussing hacks to make these libatomic routines appear implicitly it seems prudent to just turn off the automatic detection for RISC-V. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_LOCK_POLICY): Force auto to mutex for RISC-V. * configure: Regenerate.
2022-04-12libstdc++: Prefer to use mmap instead of malloc in libbacktraceJonathan Wakely1-8/+51
As reported in PR libbacktrace/105240, libbacktrace leaks memory when using malloc for allocations. I originally thought it would be simpler to just use malloc unconditionally (because it's supported on all targets) but the leaks make that problematic. This adds libbacktrace's detection for mmap to the libstdc++ configury, so that we use mmap.c and mmapio.c when possible. This avoids the leaks seen previously, at least on linux. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Check for mmap. * config.h.in: Regenerate. * configure: Regenerate.
2022-02-04libstdc++: Fix filesystem::remove_all races [PR104161]Jonathan Wakely1-2/+114
This fixes the remaining filesystem::remove_all race condition by using POSIX openat to recurse into sub-directories and using POSIX unlinkat to remove files. This avoids the remaining race where the directory being removed is replaced with a symlink after the directory has been opened, so that the filesystem::remove("subdir/file") resolves to "target/file" instead, because "subdir" has been removed and replaced with a symlink. The previous patch only fixed the case where the directory was replaced with a symlink before we tried to open it, but it still used the full (potentially compromised) path as an argument to filesystem::remove. The first part of the fix is to use openat when recursing into a sub-directory with recursive_directory_iterator. This means that opening "dir/subdir" uses the file descriptor for "dir", and so is sure to open "dir/subdir" and not "symlink/subdir". (The previous patch to use O_NOFOLLOW already ensured we won't open "dir/symlink/" here.) The second part of the fix is to use unlinkat for the remove_all operation. Previously we used a directory_iterator to get the name of each file in a directory and then used filesystem::remove(iter->path()) on that name. This meant that any checks (e.g. O_NOFOLLOW) done by the iterator could be invalidated before the remove operation on that pathname. The directory iterator contains an open DIR stream, which we can use to obtain a file descriptor to pass to unlinkat. This ensures that the file being deleted really is contained within the directory we're iterating over, rather than using a pathname that could resolve to some other file. The filesystem::remove_all function previously used a (non-recursive) filesystem::directory_iterator for each directory, and called itself recursively for sub-directories. The new implementation uses a single filesystem::recursive_directory_iterator object, and calls a new __erase member function on that iterator. That new __erase member function does the actual work of removing a file (or a directory after its contents have been iterated over and removed) using unlinkat. That means we don't need to expose the DIR stream or its file descriptor to the remove_all function, it's still encapuslated by the iterator class. It would be possible to add a __rewind member to directory iterators too, to call rewinddir after each modification to the directory. That would make it more likely for filesystem::remove_all to successfully remove everything even if files are being written to the directory tree while removing it. It's unclear if that is actually prefereable, or if it's better to fail and report an error at the first opportunity. The necessary APIs (openat, unlinkat, fdopendir, dirfd) are defined in POSIX.1-2008, and in Glibc since 2.10. But if the target doesn't provide them, the original code (with race conditions) is still used. This also reduces the number of small memory allocations needed for std::filesystem::remove_all, because we do not store the full path to every directory entry that is iterated over. The new filename_only option means we only store the filename in the directory entry, as that is all we need in order to use openat or unlinkat. Finally, rather than duplicating everything for the Filesystem TS, the std::experimental::filesystem::remove_all implementation now just calls std::filesystem::remove_all to do the work. libstdc++-v3/ChangeLog: PR libstdc++/104161 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for dirfd and unlinkat. * config.h.in: Regenerate. * configure: Regenerate. * include/bits/fs_dir.h (recursive_directory_iterator): Declare remove_all overloads as friends. (recursive_directory_iterator::__erase): Declare new member function. * include/bits/fs_fwd.h (remove, remove_all): Declare. * src/c++17/fs_dir.cc (_Dir): Add filename_only parameter to constructor. Pass file descriptor argument to base constructor. (_Dir::dir_and_pathname, _Dir::open_subdir, _Dir::do_unlink) (_Dir::unlink, _Dir::rmdir): Define new member functions. (directory_iterator): Pass filename_only argument to _Dir constructor. (recursive_directory_iterator::_Dir_stack): Adjust constructor parameters to take a _Dir rvalue instead of creating one. (_Dir_stack::orig): Add data member for storing original path. (_Dir_stack::report_error): Define new member function. (__directory_iterator_nofollow): Move here from dir-common.h and fix value to be a power of two. (__directory_iterator_filename_only): Define new constant. (recursive_directory_iterator): Construct _Dir object and move into _M_dirs stack. Pass skip_permission_denied argument to first advance call. (recursive_directory_iterator::increment): Use _Dir::open_subdir. (recursive_directory_iterator::__erase): Define new member function. * src/c++17/fs_ops.cc (ErrorReporter, do_remove_all): Remove. (fs::remove_all): Use new recursive_directory_iterator::__erase member function. * src/filesystem/dir-common.h (_Dir_base): Add int parameter to constructor and use openat to implement nofollow semantics. (_Dir_base::fdcwd, _Dir_base::set_close_on_exec, _Dir_base::openat): Define new member functions. (__directory_iterator_nofollow): Move to fs_dir.cc. * src/filesystem/dir.cc (_Dir): Pass file descriptor argument to base constructor. (_Dir::dir_and_pathname, _Dir::open_subdir): Define new member functions. (recursive_directory_iterator::_Dir_stack): Adjust constructor parameters to take a _Dir rvalue instead of creating one. (recursive_directory_iterator): Check for new nofollow option. Construct _Dir object and move into _M_dirs stack. Pass skip_permission_denied argument to first advance call. (recursive_directory_iterator::increment): Use _Dir::open_subdir. * src/filesystem/ops.cc (fs::remove_all): Use C++17 remove_all.
2022-02-01libstdc++: Improve config output for --enable-cstdio [PR104301]Jonathan Wakely1-2/+5
Currently we just print "checking for underlying I/O to use... stdio" unconditionally, whether configured to use stdio_pure or stdio_posix. We should make it clear that the user's configure option chose the right thing. libstdc++-v3/ChangeLog: PR libstdc++/104301 * acinclude.m4 (GLIBCXX_ENABLE_CSTDIO): Print different messages for stdio_pure and stdio_posix options. * configure: Regenerate.
2022-01-31Add mold detection for libs.Martin Liska1-10/+42
libatomic/ChangeLog: * acinclude.m4: Detect *_ld_is_mold and use it. * configure: Regenerate. libgomp/ChangeLog: * acinclude.m4: Detect *_ld_is_mold and use it. * configure: Regenerate. libitm/ChangeLog: * acinclude.m4: Detect *_ld_is_mold and use it. * configure: Regenerate. libstdc++-v3/ChangeLog: * acinclude.m4: Detect *_ld_is_mold and use it. * configure: Regenerate.
2022-01-27libstdc++: fix typo in acinclude.m4.Martin Liska1-1/+1
PR libstdc++/104259 libstdc++-v3/ChangeLog: * acinclude.m4: Fix typo. * configure: Regenerate.
2022-01-25libstdc++: Avoid symlink race in filesystem::remove_all [PR104161]Jonathan Wakely1-0/+55
This adds a new internal flag to the filesystem::directory_iterator constructor that makes it fail if the path is a symlink that resolves to a directory. This prevents filesystem::remove_all from following a symlink to a directory, rather than deleting the symlink itself. We can also use that new flag in recursive_directory_iterator to ensure that we don't follow symlinks if the follow_directory_symlink option is not set. This also moves an error check in filesystem::remove_all after the while loop, so that errors from the directory_iterator constructor are reproted, instead of continuing to the filesystem::remove call below. libstdc++-v3/ChangeLog: PR libstdc++/104161 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check for fdopendir. * config.h.in: Regenerate. * configure: Regenerate. * src/c++17/fs_dir.cc (_Dir): Add nofollow flag to constructor and pass it to base class constructor. (directory_iterator): Pass nofollow flag to _Dir constructor. (fs::recursive_directory_iterator::increment): Likewise. * src/c++17/fs_ops.cc (do_remove_all): Use nofollow option for directory_iterator constructor. Move error check outside loop. * src/filesystem/dir-common.h (_Dir_base): Add nofollow flag to constructor and when it's set use ::open with O_NOFOLLOW and O_DIRECTORY. * src/filesystem/dir.cc (_Dir): Add nofollow flag to constructor and pass it to base class constructor. (directory_iterator): Pass nofollow flag to _Dir constructor. (fs::recursive_directory_iterator::increment): Likewise. * src/filesystem/ops.cc (remove_all): Use nofollow option for directory_iterator constructor. Move error check outside loop.
2022-01-19libstdc++: Remove -gdwarf-4 from flags for debug libraryJonathan Wakely1-2/+2
The default is -gdwarf-5 now, so this is hurting rather than improving things. libstdc++-v3/ChangeLog: * configure.ac (GLIBCXX_ENABLE_DEBUG_FLAGS): Remove -gdwarf-4 from default flags. * configure: Regenerate.
2022-01-18libstdc++: Declare std::c8rtomb and std::mbrtoc8 if provided by the C libraryTom Honermann1-0/+76
This patch completes implementation of the C++20 proposal P0482R6 [1] by adding declarations of std::c8rtomb() and std::mbrtoc8() in <cuchar> if provided by the C library in <uchar.h>. This patch addresses feedback provided in response to a previous patch submission [2]. Autoconf changes determine if the C library declares c8rtomb and mbrtoc8 at global scope when uchar.h is included and compiled with either -fchar8_t or -std=c++20. New _GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_FCHAR8_T and _GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_CXX20 configuration macros reflect the probe results. The <cuchar> header declares these functions in the std namespace only if available and the _GLIBCXX_USE_CHAR8_T configuration macro is defined (by default it is defined if the C++20 __cpp_char8_t feature test macro is defined) Patches to glibc to implement c8rtomb and mbrtoc8 have been submitted [3]. New tests validate the presence of these declarations. The tests pass trivially if the C library does not provide these functions. Otherwise they ensure that the functions are declared when <cuchar> is included and either -fchar8_t or -std=c++20 is enabled. 1]: WG21 P0482R6 "char8_t: A type for UTF-8 characters and strings (Revision 6)" https://wg21.link/p0482r6 [2]: [PATCH] C++ P0482R6 char8_t: declare std::c8rtomb and std::mbrtoc8 if provided by the C library https://gcc.gnu.org/pipermail/libstdc++/2021-June/052685.html [3]: "C++20 P0482R6 and C2X N2653" [Patch 0/3]: https://sourceware.org/pipermail/libc-alpha/2022-January/135061.html [Patch 1/3]: https://sourceware.org/pipermail/libc-alpha/2022-January/135062.html [Patch 2/3]: https://sourceware.org/pipermail/libc-alpha/2022-January/135063.html [Patch 3/3]: https://sourceware.org/pipermail/libc-alpha/2022-January/135064.html libstdc++-v3/ChangeLog: * acinclude.m4: Define config macros if uchar.h provides c8rtomb() and mbrtoc8(). * config.h.in: Regenerate. * configure: Regenerate. * include/c_compatibility/uchar.h (c8rtomb, mbrtoc8): Define. * include/c_global/cuchar (c8rtomb, mbrtoc8): Likewise. * include/c_std/cuchar (c8rtomb, mbrtoc8): Likewise. * testsuite/21_strings/headers/cuchar/functions_std_cxx20.cc: New test. * testsuite/21_strings/headers/cuchar/functions_std_fchar8_t.cc: New test.
2022-01-18libstdc++: Improve comments describing --enable-fully-dynamic-stringJonathan Wakely1-2/+2
libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING): Improve comments. * configure: Regenerate.
2022-01-17libstdc++: Define <stacktrace> header for C++23Jonathan Wakely1-10/+307
Add the <stacktrace> header and a new libstdc++_libbacktrace.a library that provides the implementation. For now, the new library is only built if --enable-libstdcxx-backtrace=yes is used. As with the Filesystem TS, the new library is only provided as a static archive. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): New macro. * configure.ac: Use GLIBCXX_ENABLE_BACKTRACE. * include/Makefile.am: Add new header. * include/Makefile.in: Regenerate. * include/std/stacktrace: New header. * include/std/version (__cpp_lib_stacktrace): Define. * Makefile.in: Regenerate. * config.h.in: Regenerate. * configure: Regenerate. * doc/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.am: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. * src/libbacktrace/Makefile.am: New file. * src/libbacktrace/Makefile.in: New file. * src/libbacktrace/backtrace-rename.h: New file. * src/libbacktrace/backtrace-supported.h.in: New file. * src/libbacktrace/config.h.in: New file. * testsuite/lib/libstdc++.exp (check_effective_target_stacktrace): New proc. * testsuite/20_util/stacktrace/entry.cc: New test. * testsuite/20_util/stacktrace/synopsis.cc: New test. * testsuite/20_util/stacktrace/version.cc: New test.
2022-01-10libstdc++: Fix and simplify freestanding configuration [PR103866]Jonathan Wakely1-10/+25
This fixes the --disable-hosted-libstdcxx build so that it works with --without-headers. Currently you need to also use --with-newlib, which is confusing for users who aren't actually using newlib. The AM_PROG_LIBTOOL checks are currently skipped for --with-newlib and --with-avrlibc builds, with this change they are also skipped when using --without-headers. It would be nice if using --disable-hosted-libstdcxx automatically skipped those checks, but GLIBCXX_ENABLE_HOSTED comes too late to make the AM_PROG_LIBTOOL checks depend on $is_hosted. The checks for EOF, SEEK_CUR etc. cause the build to fail if there is no <stdio.h> available. Unlike most headers, which get a HAVE_FOO_H macro, <stdio.h> is in autoconf's default includes, so every check tries to include it unconditionally. This change skips those checks for freestanding builds. Similarly, the checks for <stdint.h> types done by GCC_HEADER_STDINT try to include <stdio.h> and fail for --without-headers builds. This change skips the use of GCC_HEADER_STDINT for freestanding. We can probably stop using GCC_HEADER_STDINT entirely, since only one file uses the gstdint.h header that is generated, and that could easily be changed to use <stdint.h> instead. That can wait for stage 1. We also need to skip the GLIBCXX_CROSSCONFIG stage if --without-headers was used, since we don't have any of the functions it deals with. The end result of the changes above is that it should not be necessary for a --disable-hosted-libstdcxx --without-headers build to also use --with-newlib. Finally, compile libsupc++ with -ffreestanding when --without-headers is used, so that <stdint.h> will use <gcc-stdint.h> instead of expecting it to come from libc. libstdc++-v3/ChangeLog: PR libstdc++/103866 * acinclude.m4 (GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS): Do nothing for freestanding builds. (GLIBCXX_ENABLE_HOSTED): Define FREESTANDING_FLAGS. * configure.ac: Do not use AC_LIBTOOL_DLOPEN when configured with --without-headers. Do not use GCC_HEADER_STDINT for freestanding builds. * libsupc++/Makefile.am (HOSTED_CXXFLAGS): Use -ffreestanding for freestanding builds. * configure: Regenerate. * Makefile.in: Regenerate. * doc/Makefile.in: Regenerate. * include/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate.
2021-12-10libstdc++: Fix definition of _GLIBCXX_NO_SLEEP config macroJonathan Wakely1-1/+1
If no OS function to sleep (e.g. nanosleep, usleep, Win32 Sleep etc.) is available then configure defines the macro NO_SLEEP. But this will not get prefixed with "_GLIBCXX_" because include/Makefile.am only does that for macros beginning with "HAVE_". The configure script should define _GLIBCXX_NO_SLEEP instead (which is what the code actually checks for). libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Add _GLIBCXX_ prefix to NO_SLEEP macro. * config.h.in: Regenerate. * configure: Regenerate.
2021-12-02libstdc++: Remove broken std::allocator base classes [PR103340]Jonathan Wakely1-13/+1
The bitmap_allocator, __mt_alloc and __pool_alloc extensions are no longer suitable for use as the base class of std::allocator, because they have not been updated to meet the C++20 requirements. There is a patch attached to PR 103340 which addresses that, but more work would be needed to solve the linking errors that occur when the library is configured to use them. Using --enable-libstdcxx-allocator=bitmap wouldn't even bootstrap for the past few years, and I can't find any gcc-testresults reports using any of these allocators. This patch removes the configure option to use these as the std::allocator base class. The allocators are still in the tree and can be used directly, you just can't configure the library to use one of them as the base class of std::allocator. libstdc++-v3/ChangeLog: PR libstdc++/103340 PR libstdc++/103400 PR libstdc++/103381 * acinclude.m4 (GLIBCXX_ENABLE_ALLOCATOR): Remove mt, bitmap and pool options. * configure: Regenerate. * config/allocator/bitmap_allocator_base.h: Removed. * config/allocator/mt_allocator_base.h: Removed. * config/allocator/pool_allocator_base.h: Removed. * doc/xml/manual/allocator.xml: Update. * doc/xml/manual/configure.xml: Update. * doc/xml/manual/evolution.xml: Document removal. * doc/xml/manual/mt_allocator.xml: Editorial tweaks. * doc/html/manual/*: Regenerate.
2021-11-18libstdc++: Replace AC_CACHE_VAL with AC_CACHE_CHECKJonathan Wakely1-229/+171
This replaces most uses of AC_CACHE_VAL with AC_CACHE_CHECK, which means we don't need separate AC_MSG_CHECKING and AC_MSG_RESULT macros. There are a few trivial bugs fixed as a side effect, where an AC_MSG_RESULT was printed out even if the actual checks hadn't been done. That didn't affect the results, only the content of config.log. libstdc++-v3/ChangeLog: * acinclude.m4: Replace AC_CACHE_VAL with AC_CACHE_CHECK. * configure: Regenerate.
2021-11-13libstdc++: Use GCC_TRY_COMPILE_OR_LINK for getentropy, arc4randomHans-Peter Nilsson1-2/+51
Since r12-5056-g3439657b0286, there has been a regression in test results; an additional 100 FAILs running the g++ and libstdc++ testsuite on cris-elf, a newlib target. The failures are linker errors, not finding a definition for getentropy. It appears newlib has since 2017-12-03 declarations of getentropy and arc4random, and provides an implementation of arc4random using getentropy, but provides no definition of getentropy, not even a stub yielding ENOSYS. This is similar to what it does for many other functions too. While fixing newlib (like adding said stub) would likely help, it still leaves older newlib releases hanging. Thankfully, the libstdc++ configury test can be improved to try linking where possible; using the bespoke GCC_TRY_COMPILE_OR_LINK instead of AC_TRY_COMPILE. BTW, I see a lack of consistency; some tests use AC_TRY_COMPILE and some GCC_TRY_COMPILE_OR_LINK for no apparent reason, but this commit just amends r12-5056-g3439657b0286. libstdc++-v3: PR libstdc++/103166 * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM): Use GCC_TRY_COMPILE_OR_LINK instead of AC_TRY_COMPILE. * configure: Regenerate.
2021-11-12libstdc++: Print assertion messages to stderr [PR59675]Jonathan Wakely1-1/+1
This replaces the printf used by failed debug assertions with fprintf, so we can write to stderr. To avoid including <stdio.h> the assert function is moved into the library. To avoid programs using a vague linkage definition of the old inline function, the function is renamed. Code compiled with old versions of GCC might still call the old function, but code compiled with the newer GCC will call the new function and write to stderr. libstdc++-v3/ChangeLog: PR libstdc++/59675 * acinclude.m4 (libtool_VERSION): Bump version. * config/abi/pre/gnu.ver (GLIBCXX_3.4.30): Add version and export new symbol. * configure: Regenerate. * include/bits/c++config (__replacement_assert): Remove, declare __glibcxx_assert_fail instead. * src/c++11/debug.cc (__glibcxx_assert_fail): New function to replace __replacement_assert, writing to stderr instead of stdout. * testsuite/util/testsuite_abi.cc: Update latest version.
2021-11-09libstdc++: Support getentropy and arc4random in std::random_deviceJonathan Wakely1-0/+103
This adds additional "getentropy" and "arc4random" tokens to std::random_device. The former is supported on Glibc and OpenBSD (and apparently wasm), and the latter is supported on various BSDs. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM): Define. * configure.ac (GLIBCXX_CHECK_GETENTROPY, GLIBCXX_CHECK_ARC4RANDOM): Use them. * config.h.in: Regenerate. * configure: Regenerate. * src/c++11/random.cc (random_device): Add getentropy and arc4random as sources. * testsuite/26_numerics/random/random_device/cons/token.cc: Check new tokens. * testsuite/26_numerics/random/random_device/entropy.cc: Likewise.
2021-09-15libstdc++: Check for TLS support on mingw cross-compilersHugo Beauzée-Luyssen1-0/+208
Native mingw builds enable TLS, but crosses don't because we don't use GCC_CHECK_TLS in the cross-compiler config. libstdc++-v3/ChangeLog: * crossconfig.m4: Check for TLS support on mingw. * configure: Regenerate.
2021-08-31libstdc++: Fix broken autoconf check for O_NONBLOCKJonathan Wakely1-4/+4
Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * configure.ac: Fix checks for F_GETFL, F_SETFL and O_NONBLOCK. * configure: Regenerate.
2021-08-26libstdc++: Make Networking TS headers more portable [PR100285]Jonathan Wakely1-8/+74
Add more preprocessor conditions to check for constants being defined before using them, so that the Networking TS headers can be compiled on a wider range of platforms. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: PR libstdc++/100285 * configure.ac: Check for O_NONBLOCK. * configure: Regenerate. * include/experimental/internet: Include <ws2tcpip.h> for Windows. Use preprocessor conditions around more constants. * include/experimental/socket: Use preprocessor conditions around more constants. * testsuite/experimental/net/internet/resolver/base.cc: Only use constants when the corresponding C macro is defined. * testsuite/experimental/net/socket/basic_socket.cc: Likewise. * testsuite/experimental/net/socket/socket_base.cc: Likewise. Make preprocessor checks more fine-grained.
2021-07-30libstdc++: Use secure_getenv for filesystem::temp_directory_path() [PR65018]Jonathan Wakely1-0/+11
This adds a configure check for the GNU extension secure_getenv and then uses it for looking up TMPDIR and similar variables. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: PR libstdc++/65018 * configure.ac: Check for secure_getenv. * config.h.in: Regenerate. * configure: Regenerate. * src/filesystem/ops-common.h (get_temp_directory_from_env): New helper function to obtain path from the environment. * src/c++17/fs_ops.cc (fs::temp_directory_path): Use new helper. * src/filesystem/ops.cc (fs::temp_directory_path): Likewise. * testsuite/27_io/filesystem/operations/temp_directory_path.cc: Print messages if test cannot be run. * testsuite/experimental/filesystem/operations/temp_directory_path.cc: Likewise. Fix incorrect condition. Use "TMP" to work with Windows as well as POSIX.
2021-05-04ctype support for libstdc++ on VxWorksCorentin Gay1-0/+19
for libstdc++-v3/ChangeLog * acinclude.m4: Add VxWorks-specific case for the configuration of ctypes. * configure: Regenerate. * config/locale/vxworks/ctype_members.cc: Add VxWorks-specific version. * config/os/vxworks/ctype_base.h: Adjust for VxWorks7+. * config/os/vxworks/ctype_configure_char.cc: Likewise. * config/os/vxworks/ctype_inline.h: Likewise. * testsuite/28_regex/traits/char/isctype.cc: Defines NEWLINE_IN_CLASS_BLANK if the target is VxWorks. * testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.
2021-05-04libstdc++: Remove _GLIBCXX_USE_INT128 autoconf macroJonathan Wakely1-35/+1
We don't need to decide whether to use __int128 when running configure, we can do so at compilation time by seeing if __SIZEOF_INT128__ is defined and if it's greater than __SIZEOF_LONG_LONG__. This removes another unnecessary architecture-specific config macro in <bits/c++config.h>, so the same header can work for 32-bit or 64-bit compilation on AIX. libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_ENABLE_INT128_FLOAT128): Remove checks for __int128 and rename to GLIBCXX_ENABLE_FLOAT128. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Adjust to use GLIBCXX_ENABLE_FLOAT128. * include/bits/random.h (_Select_uint_least_t<s, 1>): Use __SIZEOF_INT128__ to decide whether to use __int128. * include/std/charconv (__to_chars_unsigned_type): Likewise.
2021-04-30libstdc++: Remove GLIBCXX_CHECK_INT64_T checksJonathan Wakely1-130/+0
This simplifies the definition of std::streamoff by using the predefined __INT64_TYPE__ macro, instead of the _GLIBCXX_HAVE_INT64_T_LONG, _GLIBCXX_HAVE_INT64_T_LONG_LONG and _GLIBCXX_HAVE_INT64_T macros defined by configure. By using the __INT64_TYPE__ macro (which all of GCC, Clang and Intel define) we do not need to determine the type of int64_t in configure, we can just use that type directly. The background for the change was explained by David Edelsohn: Currently the type of streamoff is determined at libstdc++ configure time, chosen by the definitions of _GLIBCXX_HAVE_INT64_T_LONG and _GLIBCXX_HAVE_INT64_T_LONG_LONG. For a multilib configuration, the difference is encoded in the different multilib header file paths. For "FAT" library targets that package 32 bit and 64 bit libraries together, G++ also expects a single header file directory hierarchy, causing an incorrect value for streamoff in some situations. And in a subsequent mail: Most of the libstdc++ headers are architecture-neutral, OS neutral and ABI neutral. The differences are localized in bits/c++config.h. And most of c++config.h is identical for 32 bit AIX and 64 bit AIX. The only differences that matter are __int128 and __int64_t. This change removes some of those differences. With the only uses of the INT64_T configure macros removed, the configure checks themselves can also be removed. Co-authored-by: David Edelsohn <dje.gcc@gmail.com> libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_CHECK_INT64_T): Delete. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Do not use GLIBCXX_CHECK_INT64_T. * include/bits/postypes.h: Remove include of <stdint.h> and definition/undefinition of the __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS macros. (streamoff): Use __INT64_TYPE__ if defined.
2021-04-21Fix AIX libstdc++ semaphore support [PR100164]Jakub Jelinek1-1/+1
> > The #error would not be hit if _GLIBCXX_HAVE_POSIX_SEMAPHORE were defined, > > but it shows up in your error report. > You now have pinpointed the problem. > It's not that AIX doesn't have semaphore, but that the code previously > had a fallback that hid a bug in the macros: // Use futex if available and didn't force use of POSIX using __fast_semaphore = __atomic_semaphore<__detail::__platform_wait_t>; using __fast_semaphore = __platform_semaphore; using __fast_semaphore = __atomic_semaphore<ptrdiff_t>; > The problem is that libstdc++ configure defines > _GLIBCXX_HAVE_POSIX_SEMAPHORE in config.h. libstdc++ uses sed to > rewrite config.h to c++config.h and prepends _GLIBCXX_, so c++config.h > contains > And bits/semaphore_base.h is not testing that corrupted macro. Either > semaphore_base.h needs to test for the corrupted macro, or libtsdc++ > configure needs to define HAVE_POSIX_SEMAPHORE without itself > prepending _GLIBCXX_ so that the c++config.h rewriting works > correctly and defines the correct macro for semaphore_base.h. The include/Makefile.am sed is: sed -e 's/HAVE_/_GLIBCXX_HAVE_/g' \ -e 's/PACKAGE/_GLIBCXX_PACKAGE/g' \ -e 's/VERSION/_GLIBCXX_VERSION/g' \ -e 's/WORDS_/_GLIBCXX_WORDS_/g' \ -e 's/_DARWIN_USE_64_BIT_INODE/_GLIBCXX_DARWIN_USE_64_BIT_INODE/g' \ -e 's/_FILE_OFFSET_BITS/_GLIBCXX_FILE_OFFSET_BITS/g' \ -e 's/_LARGE_FILES/_GLIBCXX_LARGE_FILES/g' \ -e 's/ICONV_CONST/_GLIBCXX_ICONV_CONST/g' \ -e '/[ ]_GLIBCXX_LONG_DOUBLE_COMPAT[ ]/d' \ -e '/[ ]_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT[ ]/d' \ < ${CONFIG_HEADER} >> $@ ;\ so for many macros one needs _GLIBCXX_ prefixes already in configure, as can be seen in grep AC_DEFINE.*_GLIBCXX configure.ac acinclude.m4 But _GLIBCXX_HAVE_POSIX_SEMAPHORE is the only one that shouldn't have that prefix because the sed is adding that. E.g. on i686-linux, I see grep _GLIBCXX__GLIBCXX c++config.h that proves it is the only broken one. So this change fixes the acinclude.m4 side. 2021-04-21 Jakub Jelinek <jakub@redhat.com> PR libstdc++/100164 * acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE. * configure: Regenerated. * config.h.in: Regenerated.
2021-04-08libstdc++: Regenerate configure scriptJonathan Wakely1-20/+10
This seems to be a missing piece of r11-6492. libstdc++-v3/ChangeLog: * configure: Regenerate.
2021-01-05Update GNU/Hurd configure supportSamuel Thibault1-11/+1
ChangeLog: * libtool.m4: Match gnu* along other GNU systems. * libgo/config/libtool.m4: Match gnu* along other GNU systems. * libgo/configure: Re-generate. libffi/ * configure: Re-generate. libgomp/ * configure: Re-generate. gcc/ * configure: Re-generate. libatomic/ * configure: Re-generate. libbacktrace/ * configure: Re-generate. libcc1/ * configure: Re-generate. libgfortran/ * configure: Re-generate. libgomp/ * configure: Re-generate. libhsail-rt/ * configure: Re-generate. libitm/ * configure: Re-generate. libobjc/ * configure: Re-generate. liboffloadmic/ * configure: Re-generate. * plugin/configure: Re-generate. libphobos/ * configure: Re-generate. libquadmath/ * configure: Re-generate. libsanitizer/ * configure: Re-generate. libssp/ * configure: Re-generate. libstdc++-v3/ * configure: Re-generate. libvtv/ * configure: Re-generate. lto-plugin/ * configure: Re-generate. zlib/ * configure: Re-generate.
2020-12-17libstdc++: Regenerate autoconf filesJonathan Wakely1-631/+0
I forgot to regenerate these files in r11-6137. libstdc++-v3/ChangeLog: * config.h.in: Regenerate. * configure: Regenerate.
2020-12-16libstdc++: Add C++ runtime support for new 128-bit long double formatJonathan Wakely1-10/+121
This adds support for the new __ieee128 long double format on powerpc64le targets. Most of the complexity comes from wanting a single libstdc++.so library that contains the symbols needed by code compiled with both -mabi=ibmlongdouble and -mabi=ieeelongdouble (and not forgetting -mlong-double-64 as well!) In a few places this just requires an extra overload, for example std::from_chars has to be overloaded for both forms of long double. That can be done in a single translation unit that defines overloads for 'long double' and also '__ieee128', so that user code including <charconv> will be able to link to a definition for either type of long double. Those are the easy cases. The difficult parts are (as for the std::string ABI transition) the I/O and locale facets. In order to be able to write either form of long double to an ostream such as std::cout we need the locale to contain a std::num_put facet that can handle both forms. The same approach is taken as was already done for supporting 64-bit long double and 128-bit long double: adding extra overloads of do_put to the facet class. On targets where the new long double code is enabled, the facets that are registered in the locale at program startup have additional overloads so that they can work with any long double type. Where this fails to work is if user code installs its own facet, which will probably not have the additional overloads and so will only be able to output one or the other type. In practice the number of users expecting to be able to use their own locale facets in code using a mix of -mabi=ibmlongdouble and -mabi=ieeelongdouble is probably close to zero. libstdc++-v3/ChangeLog: * Makefile.in: Regenerate. * config.h.in: Regenerate. * config/abi/pre/gnu.ver: Make patterns less greedy. * config/os/gnu-linux/ldbl-ieee128-extra.ver: New file with patterns for IEEE128 long double symbols. * configure: Regenerate. * configure.ac: Enable alternative 128-bit long double format on powerpc64*-*-linux*. * doc/Makefile.in: Regenerate. * fragment.am: Regenerate. * include/Makefile.am: Set _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT. * include/Makefile.in: Regenerate. * include/bits/c++config: Define inline namespace for new long double symbols. Don't define _GLIBCXX_USE_FLOAT128 when it's the same type as long double. * include/bits/locale_classes.h [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT] (locale::_Impl::_M_init_extra_ldbl128): Declare new member function. * include/bits/locale_facets.h (_GLIBCXX_NUM_FACETS): Simplify by only counting narrow character facets. (_GLIBCXX_NUM_CXX11_FACETS): Likewise. (_GLIBCXX_NUM_LBDL_ALT128_FACETS): New. [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT] (num_get::__do_get): Define vtable placeholder for __ibm128 long double type. [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__] (num_get::__do_get): Declare vtable placeholder for __ibm128 long double type. [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__] (num_put::__do_put): Likewise. * include/bits/locale_facets.tcc [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__] (num_get::__do_get, num_put::__do_put): Define. * include/bits/locale_facets_nonio.h [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__] (money_get::__do_get): Declare vtable placeholder for __ibm128 long double type. [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__] (money_put::__do_put): Likewise. * include/bits/locale_facets_nonio.tcc [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT && __LONG_DOUBLE_IEEE128__] (money_get::__do_get, money_put::__do_put): Define. * include/ext/numeric_traits.h [_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT] (__numeric_traits<__ibm128>, __numeric_traits<__ieee128>): Define. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.am: Add compatibility-ldbl-alt128.cc and compatibility-ldbl-alt128-cxx11.cc sources and recipes for objects. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++11/compatibility-ldbl-alt128-cxx11.cc: New file defining symbols using the old 128-bit long double format, for the cxx11 ABI. * src/c++11/compatibility-ldbl-alt128.cc: Likewise, for the gcc4-compatible ABI. * src/c++11/compatibility-ldbl-facets-aliases.h: New header for long double compat aliases. * src/c++11/cow-locale_init.cc: Add comment. * src/c++11/cxx11-locale-inst.cc: Define C and C_is_char unconditionally. * src/c++11/cxx11-wlocale-inst.cc: Add sanity check. Include locale-inst.cc directly, not via cxx11-locale-inst.cc. * src/c++11/locale-inst-monetary.h: New header for monetary category instantiations. * src/c++11/locale-inst-numeric.h: New header for numeric category instantiations. * src/c++11/locale-inst.cc: Include new headers for monetary, numeric, and long double definitions. * src/c++11/wlocale-inst.cc: Remove long double compat aliases that are defined in new header now. * src/c++17/Makefile.am: Use -mabi=ibmlongdouble for floating_from_chars.cc. * src/c++17/Makefile.in: Regenerate. * src/c++17/floating_from_chars.cc (from_chars_impl): Add if-constexpr branch for __ieee128. (from_chars): Overload for __ieee128. * src/c++20/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/c++98/locale_init.cc (num_facets): Adjust calculation. (locale::_Impl::_Impl(size_t)): Call _M_init_extra_ldbl128. * src/c++98/localename.cc (num_facets): Adjust calculation. (locale::_Impl::_Impl(const char*, size_t)): Call _M_init_extra_ldbl128. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. * testsuite/util/testsuite_abi.cc: Add new symbol versions. Allow new symbols to be added to GLIBCXX_IEEE128_3.4.29 and CXXABI_IEEE128_1.3.13 too. * testsuite/26_numerics/complex/abi_tag.cc: Add u9__ieee128 to regex matching expected symbols.
2020-12-15libstdc++: Support libc with stdio-only I/O in libstdc++Keith Packard1-5/+12
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.
2020-12-15libstdc++: Disabling AC_LIBTOOL_DLOPEN check if building with avr-libcVladimir Vishnevsky1-1/+1
The AC_LIBTOOL_DLOPEN checks were previously disabled for newlib targets. The patch applies similar logic to avr-libc based builds. libstdc++-v3/ChangeLog: * configure.ac: Skip AC_LIBTOOL_DLOPEN check if avr-libc is used. * configure: Regenerate.
2020-12-09libstdc++: Fix build failure for target with no way to sleepJonathan Wakely1-0/+8
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.
2020-12-05Darwin : Update libtool and dependencies for Darwin20 [PR97865]Iain Sandoe1-23/+25
The change in major version (and the increment from Darwin19 to 20) caused libtool tests to fail which resulted in incorrect build settings for shared libraries. We take this opportunity to sort out the shared undefined symbols state rather than propagating the current unsound behaviour into a new rev. This change means that we default to the case that missing symbols are considered an error, and if one wants to allow this intentionally, the confiuration for that case should be set appropriately. Three existing cases need undefined dynamic lookup: libitm, where there is already a configuration mechanism to add the flags. libcc1, where we add simple configuration to add the flags for Darwin. libsanitizer, where we can add to the existing extra flags. libcc1/ChangeLog: PR target/97865 * Makefile.am: Add dynamic_lookup to LD flags for Darwin. * configure.ac: Test for Darwin host and set a flag. * Makefile.in: Regenerate. * configure: Regenerate. libitm/ChangeLog: PR target/97865 * configure.tgt: Add dynamic_lookup to XLDFLAGS for Darwin. * configure: Regenerate. libsanitizer/ChangeLog: PR target/97865 * configure.tgt: Add dynamic_lookup to EXTRA_CXXFLAGS for Darwin. * configure: Regenerate. ChangeLog: PR target/97865 * libtool.m4: Update handling of Darwin platform link flags for Darwin20. gcc/ChangeLog: PR target/97865 * configure: Regenerate. libatomic/ChangeLog: PR target/97865 * configure: Regenerate. libbacktrace/ChangeLog: PR target/97865 * configure: Regenerate. libffi/ChangeLog: PR target/97865 * configure: Regenerate. libgfortran/ChangeLog: PR target/97865 * configure: Regenerate. libgomp/ChangeLog: PR target/97865 * configure: Regenerate. libhsail-rt/ChangeLog: PR target/97865 * configure: Regenerate. libobjc/ChangeLog: PR target/97865 * configure: Regenerate. libphobos/ChangeLog: PR target/97865 * configure: Regenerate. libquadmath/ChangeLog: PR target/97865 * configure: Regenerate. libssp/ChangeLog: PR target/97865 * configure: Regenerate. libstdc++-v3/ChangeLog: PR target/97865 * configure: Regenerate. libvtv/ChangeLog: PR target/97865 * configure: Regenerate. zlib/ChangeLog: PR target/97865 * configure: Regenerate.
2020-11-29Fix hppa64-hpux11 build to remove source paths from embedded path.John David Anglin1-4/+4
This change adds the +nodefaultrpath ld option to remove all library paths that were specified with the -L option from the embedded path. 2020-11-29 John David Anglin <danglin@gcc.gnu.org> ChangeLog: * libtool.m4 (archive_cmds): Add +nodefaultrpath ld option on hppa64-*-hpux11*. libatomic/ChangeLog: * configure: Regenerate. libbacktrace/ChangeLog: * configure: Regenerate. libcc1/ChangeLog: * configure: Regenerate. libffi/ChangeLog: * configure: Regenerate. libgfortran/ChangeLog: * configure: Regenerate. libgomp/ChangeLog: * configure: Regenerate. libhsail-rt/ChangeLog: * configure: Regenerate. libitm/ChangeLog: * configure: Regenerate. libobjc/ChangeLog: * configure: Regenerate. liboffloadmic/ChangeLog: * configure: Regenerate. * plugin/configure: Regenerate. libquadmath/ChangeLog: * configure: Regenerate. libsanitizer/ChangeLog: * configure: Regenerate. libssp/ChangeLog: * configure: Regenerate. libstdc++-v3/ChangeLog: * configure: Regenerate. libvtv/ChangeLog: * configure: Regenerate. lto-plugin/ChangeLog: * configure: Regenerate. zlib/ChangeLog: * configure: Regenerate.
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