[sanitizers] build symbolizer with lld

[fmayer]

Without this, we use the system /usr/bin/ld, which is an older LLD.

That can lead to problems with LTO and breaks the aarch64 buildbot.

[llvmbot]

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: Florian Mayer (fmayer)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/172093.diff

1 Files Affected:

• (modified) compiler-rt/lib/sanitizer_common/symbolizer/CMakeLists.txt (+1-1)

diff --git a/compiler-rt/lib/sanitizer_common/symbolizer/CMakeLists.txt b/compiler-rt/lib/sanitizer_common/symbolizer/CMakeLists.txt
index bb8298931c390..d39fa66e91cef 100644
--- a/compiler-rt/lib/sanitizer_common/symbolizer/CMakeLists.txt
+++ b/compiler-rt/lib/sanitizer_common/symbolizer/CMakeLists.txt
@@ -12,7 +12,7 @@ foreach(arch ${SANITIZER_COMMON_SUPPORTED_ARCH})
                              sanitizer_symbolize.cpp
                              scripts/build_symbolizer.sh
                      WORKING_DIRECTORY ${RTSanitizerCommonSymbolizerInternalDir}
-                     COMMAND FLAGS=${TARGET_CFLAGS}
+                     COMMAND FLAGS="${TARGET_CFLAGS} -fuse-fd=${LLVM_TOOLS_BINARY_DIR}/lld"
                              CLANG=${LLVM_TOOLS_BINARY_DIR}/clang
                              ${CMAKE_CURRENT_SOURCE_DIR}/scripts/build_symbolizer.sh
                              ${CMAKE_CURRENT_BINARY_DIR}/RTSanitizerCommonSymbolizerInternal.${arch}.o

[fmayer]

CC @qinkunbao this should fix the aarch64 bot

[fmayer]

Buildbot fixed by this: https://lab.llvm.org/buildbot/#/builders/51/builds/28733