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From 89c9b5e2bec26bad047a60bd08722ff138cb7cb3 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 25 Jan 2019 14:39:04 -0800
Subject: [PATCH] clang: Append libunwind to compiler-rt for linking
Some packages which use libgcc tend to use low level unwind functions
too, and they are missing in compiler-rt but provided by llvm libunwind
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
clang/lib/Driver/ToolChains/CommonArgs.cpp | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index d7e316befa6..72226dd09ce 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1191,6 +1191,12 @@ void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
switch (RLT) {
case ToolChain::RLT_CompilerRT:
CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
+ CmdArgs.push_back("--as-needed");
+ CmdArgs.push_back("-lunwind");
+ CmdArgs.push_back("-lpthread");
+ CmdArgs.push_back("-ldl");
+ CmdArgs.push_back("--no-as-needed");
+
break;
case ToolChain::RLT_Libgcc:
// Make sure libgcc is not used under MSVC environment by default
--
2.20.1
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