MemorySanitizer unit tests.

llvm-svn: 171062
diff --git a/compiler-rt/cmake/Modules/CompilerRTLink.cmake b/compiler-rt/cmake/Modules/CompilerRTLink.cmake
new file mode 100644
index 0000000..85030a7
--- /dev/null
+++ b/compiler-rt/cmake/Modules/CompilerRTLink.cmake
@@ -0,0 +1,14 @@
+include(LLVMParseArguments)
+
+# Link a shared library with just-built Clang.
+# clang_link_shared(<output.so>
+#                   OBJECTS <list of input objects>
+#                   LINKFLAGS <list of link flags>
+#                   DEPS <list of dependencies>)
+macro(clang_link_shared so_file)
+  parse_arguments(SOURCE "OBJECTS;LINKFLAGS;DEPS" "" ${ARGN})
+  add_custom_command(
+    OUTPUT ${so_file}
+    COMMAND clang -o "${so_file}" -shared ${SOURCE_LINKFLAGS} ${SOURCE_OBJECTS}
+    DEPENDS clang ${SOURCE_DEPS})
+endmacro()