Use LLD for Android compiler-rt

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D90720

Author: oontvoo

compiler-rt/CMakeLists.txt

@@ -597,7 +597,18 @@ else()
     set(COMPILER_RT_HAS_LLD TRUE)
   endif()
 endif()
+
+if(ANDROID)
+  set(COMPILER_RT_HAS_LLD TRUE)
+  set(COMPILER_RT_TEST_USE_LLD TRUE)
+  append_list_if(COMPILER_RT_HAS_FUSE_LD_LLD_FLAG -fuse-ld=lld SANITIZER_COMMON_LINK_FLAGS)
+  append_list_if(COMPILER_RT_HAS_LLD -fuse-ld=lld COMPILER_RT_UNITTEST_LINK_FLAGS)
+  if(COMPILER_RT_HAS_FUSE_LD_LLD_FLAG)
+    set(COMPILER_RT_HAS_GNU_VERSION_SCRIPT_COMPAT FALSE)
+  endif()
+endif()
 pythonize_bool(COMPILER_RT_HAS_LLD)
+pythonize_bool(COMPILER_RT_TEST_USE_LLD)
 
 add_subdirectory(lib)
 

compiler-rt/test/asan/TestCases/Linux/globals-gc-sections-lld.cpp

@@ -3,7 +3,8 @@
 
 // https://code.google.com/p/address-sanitizer/issues/detail?id=260
 // REQUIRES: lld
-
+// FIXME: This may pass on Android, with non-emulated-tls.
+// XFAIL: android
 int undefined();
 
 // On i386 clang adds --export-dynamic when linking with ASan, which adds all

compiler-rt/test/lit.common.cfg.py

@@ -60,18 +60,6 @@
 if config.memprof_shadow_scale != '':
   config.target_cflags += " -mllvm -memprof-mapping-scale=" + config.memprof_shadow_scale
 
-# BFD linker in 64-bit android toolchains fails to find libc++_shared.so, which
-# is a transitive shared library dependency (via asan runtime).
-if config.android:
-  # Prepend the flag so that it can be overridden.
-  config.target_cflags = "-pie -fuse-ld=gold " + config.target_cflags
-  if config.android_ndk_version < 19:
-    # With a new compiler and NDK < r19 this flag ends up meaning "link against
-    # libc++", but NDK r19 makes this mean "link against the stub libstdc++ that
-    # just contains a handful of ABI functions", which makes most C++ code fail
-    # to link. In r19 and later we just use the default which is libc++.
-    config.cxx_mode_flags.append('-stdlib=libstdc++')
-
 config.environment = dict(os.environ)
 
 # Clear some environment variables that might affect Clang.

compiler-rt/test/lit.common.configured.in

@@ -35,7 +35,7 @@ set_default("apple_platform_min_deployment_target_flag", "-mmacosx-version-min")
 set_default("sanitizer_can_use_cxxabi", @SANITIZER_CAN_USE_CXXABI_PYBOOL@)
 set_default("has_lld", @COMPILER_RT_HAS_LLD_PYBOOL@)
 set_default("can_symbolize", @CAN_SYMBOLIZE@)
-set_default("use_lld", False)
+set_default("use_lld", @COMPILER_RT_TEST_USE_LLD_PYBOOL@)
 set_default("use_thinlto", False)
 set_default("use_lto", config.use_thinlto)
 set_default("use_newpm", False)