Index: runtimes/CMakeLists.txt
===================================================================
--- runtimes/CMakeLists.txt
+++ runtimes/CMakeLists.txt
@@ -249,7 +249,6 @@
                                         -DCOMPILER_RT_DEFAULT_TARGET_ONLY=On
                                         ${${target}_extra_args}
                              TOOLCHAIN_TOOLS clang lld llvm-ar llvm-ranlib
-                             PASSTHROUGH_PREFIXES COMPILER_RT
                              USE_TOOLCHAIN
                              ${EXTRA_ARGS})
   endfunction()
@@ -336,7 +335,7 @@
 
   # runtime_register_target(target)
   #   Utility function to register external runtime target.
-  function(runtime_register_target name target deps prefixes)
+  function(runtime_register_target name target deps)
     include(${LLVM_BINARY_DIR}/runtimes/${name}/Components.cmake OPTIONAL)
     set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${LLVM_BINARY_DIR}/runtimes/${name}/Components.cmake)
 
@@ -397,7 +396,6 @@
                                         -DLLVM_RUNTIMES_TARGET=${name}
                                         ${${name}_extra_args}
                              TOOLCHAIN_TOOLS clang lld llvm-ar llvm-ranlib
-                             PASSTHROUGH_PREFIXES ${prefixes}
                              EXTRA_TARGETS ${${name}_extra_targets}
                                            ${${name}_test_targets}
                              USE_TOOLCHAIN
@@ -434,7 +432,7 @@
           list(GET target_list 1 target)
         endif()
 
-        runtime_register_target(${name} ${target} ${deps} ${prefixes})
+        runtime_register_target(${name} ${target} ${deps})
 
         add_dependencies(runtimes runtimes-${name})
         add_dependencies(runtimes-configure runtimes-${name}-configure)