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* [libcxx{,abi}] Emit deplibs only when detected by CMakeMichał Górny2019-12-021-1/+1
| | | | | | | | This is a followup to 35bc5276ca3. It fixes the dependent libs usage in libcxx and libcxxabi to link pthread and rt libraries only if CMake detects them, rather than based on explicit platform blacklist. Differential Revision: https://reviews.llvm.org/D70888
* [libcxxabi] __cxa_guard_require: test guard byte with != 0 instead of == 1Fangrui Song2019-08-161-1/+1
| | | | llvm-svn: 369109
* [runtimes] Don't depend on libpthread on AndroidYi Kong2019-07-221-1/+1
| | | | | | | | | | r362048 added support for ELF dependent libraries, but broke Android build since Android does not have libpthread. Remove the dependency on the Android build. Differential Revision: https://reviews.llvm.org/D65098 llvm-svn: 366734
* [runtimes] Check if pragma comment(lib, ...) is supported firstPetr Hosek2019-05-301-1/+1
| | | | | | | | | This fixes the issue introduced by r362048 where we always use pragma comment(lib, ...) for dependent libraries when the compiler is Clang, but older Clang versions don't support this pragma so we need to check first if it's supported before using it. llvm-svn: 362055
* [runtimes] Support ELF dependent libraries featurePetr Hosek2019-05-301-0/+5
| | | | | | | | | | | | | | | | | | | As of r360984, LLD supports dependent libraries feature for ELF. libunwind, libc++abi and libc++ have library dependencies: libdl librt and libpthread, which means that when libunwind and libc++ are being statically linked (using -static-libstdc++ flag), user has to manually specify -ldl -lpthread which is onerous. This change includes the lib pragma to specify the library dependencies directly in the source that uses those libraries. This doesn't make any difference when using linkers that don't support dependent libraries. However, when using LLD that has dependent libraries feature, users no longer have to manually specifying library dependencies when using static linking, linker will pick the library automatically. Differential Revision: https://reviews.llvm.org/D62090 llvm-svn: 362048
* Fix compilation error with -DLIBCXXABI_ENABLE_THREADS=OFFMichael Platings2019-04-251-0/+3
| | | | | | | | | | | | The error is: libcxxabi/src/cxa_guard_impl.h: In instantiation of ‘__cxxabiv1::{anonymous}::LibcppMutex __cxxabiv1::{anonymous}::GlobalStatic<__cxxabiv1::{anonymous}::LibcppMutex>::instance’: libcxxabi/src/cxa_guard_impl.h:529:62: required from here libcxxabi/src/cxa_guard_impl.h:510:23: error: ‘__cxxabiv1::{anonymous}::LibcppMutex __cxxabiv1::{anonymous}::GlobalStatic<__cxxabiv1::{anonymous}::LibcppMutex>::instance’ has incomplete type _LIBCPP_SAFE_STATIC T GlobalStatic<T>::instance = {}; ^ llvm-svn: 359175
* Cleanup new cxa guard implementation.Eric Fiselier2019-04-241-4/+13
| | | | | | | | * Add TSAN annotations around the futex syscalls. * Test that the futex syscall wrappers actually work. * Fix bad names. llvm-svn: 359069
* Rewrite cxa guard implementation.Eric Fiselier2019-04-241-0/+550
This patch does three main things: (1) It re-writes the cxa guard implementation to make it testable. (2) Adds support for recursive init detection on non-apple platforms. (3) It adds a futex based implementation. The futex based implementation locks and notifies on a per-object basis, unlike the current implementation which uses a global lock for all objects. Once this patch settles I'll turn it on by default when supported. llvm-svn: 359060
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