From d687ffafecd9eab2e78cd8cce4b35b303e9fe482 Mon Sep 17 00:00:00 2001 From: Jun Yuan Tan Date: Tue, 9 Nov 2021 10:16:16 +0800 Subject: [PATCH 12/34] clang: Add -lpthread and -ldl along with -lunwind for static linking When doing static liking with --unwindlib=libunwind -static we encounter undefined symbols libunwind/src/RWMutex.hpp:68: undefined reference to `pthread_rwlock_wrlock' and libunwind/src/AddressSpace.hpp:597: undefined reference to `dladdr' therefore we need to link in libpthread and libdl to fill these symbols Rebased to LLVM 14.0.0 by Jun Yuan Tan Signed-off-by: Khem Raj Signed-off-by: Jun Yuan Tan --- clang/lib/Driver/ToolChains/CommonArgs.cpp | 2 ++ 1 file changed, 2 insertions(+) diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp index 9f1895466c98..2682a9df9e1c 100644 --- a/clang/lib/Driver/ToolChains/CommonArgs.cpp +++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp @@ -1449,6 +1449,8 @@ static void AddUnwindLibrary(const ToolChain &TC, const Driver &D, CmdArgs.push_back("-lunwind"); } else if (LGT == LibGccType::StaticLibGcc) { CmdArgs.push_back("-l:libunwind.a"); + CmdArgs.push_back("-lpthread"); + CmdArgs.push_back("-ldl"); } else if (TC.getTriple().isOSCygMing()) { if (LGT == LibGccType::SharedLibGcc) CmdArgs.push_back("-l:libunwind.dll.a"); -- 2.33.1