Summary:
The CheckAtomic module performs two tests to determine if passing
'-latomic' to the linker is required: one for 64-bit atomics, and
another for non-64-bit atomics. clangd only uses the result from
HAVE_CXX_ATOMICS64_WITHOUT_LIB. This is incomplete because there are
uses of non-64-bit atomics in the code, such as the ReplyOnce::Replied
of type std::atomic<bool> defined in clangd/ClangdLSPServer.cpp.
Fix by also checking for the result of HAVE_CXX_ATOMICS_WITHOUT_LIB.
See also: https://reviews.llvm.org/D68964
Reviewers: ilya-biryukov, nridge, kadircet, beanz, compnerd, luismarques
Reviewed By: luismarques
Tags: #clang
Differential Revision: https://reviews.llvm.org/D69869
endif()
set(CLANGD_ATOMIC_LIB "")
-if(NOT HAVE_CXX_ATOMICS64_WITHOUT_LIB)
+if(NOT HAVE_CXX_ATOMICS_WITHOUT_LIB OR NOT HAVE_CXX_ATOMICS64_WITHOUT_LIB)
list(APPEND CLANGD_ATOMIC_LIB "atomic")
endif()