CMake: don't try to use lld if we're not building it.

Monorepo version!

llvm-svn: 304716

Author: TNorthover

compiler-rt/CMakeLists.txt

@@ -255,7 +255,7 @@ if(EXISTS ${COMPILER_RT_LLD_PATH}/ AND LLVM_TOOL_LLD_BUILD)
   set(COMPILER_RT_HAS_LLD TRUE)
 else()
   set(COMPILER_RT_LLD_PATH ${LLVM_MAIN_SRC_DIR}/../lld)
-  if(EXISTS ${COMPILER_RT_LLD_PATH}/)
+  if(EXISTS ${COMPILER_RT_LLD_PATH}/ AND LLVM_TOOL_LLD_BUILD)
     set(COMPILER_RT_HAS_LLD TRUE)
   else()
     set(COMPILER_RT_HAS_LLD FALSE)