diff --git a/llvm/runtimes/CMakeLists.txt b/llvm/runtimes/CMakeLists.txt
--- a/llvm/runtimes/CMakeLists.txt
+++ b/llvm/runtimes/CMakeLists.txt
@@ -266,7 +266,8 @@
       string(FIND "${variableName}" "BUILTINS_${target}" out)
       if("${out}" EQUAL 0)
         string(REPLACE "BUILTINS_${target}_" "" new_name ${variableName})
-        list(APPEND ${target}_extra_args "-D${new_name}=${${variableName}}")
+        string(REPLACE ";" "|" new_value "${${variableName}}")
+        list(APPEND ${target}_extra_args "-D${new_name}=${new_value}")
       endif()
     endforeach()
 
@@ -452,22 +453,19 @@
       string(FIND "${variableName}" "RUNTIMES_${target}_" out)
       if("${out}" EQUAL 0)
         string(REPLACE "RUNTIMES_${target}_" "" new_name ${variableName})
-        list(APPEND ${name}_extra_args "-D${new_name}=${${variableName}}")
+        string(REPLACE ";" "|" new_value "${${variableName}}")
+        list(APPEND ${name}_extra_args "-D${new_name}=${new_value}")
       endif()
     endforeach()
     foreach(variableName ${variableNames})
       string(FIND "${variableName}" "RUNTIMES_${name}_" out)
       if("${out}" EQUAL 0)
         string(REPLACE "RUNTIMES_${name}_" "" new_name ${variableName})
-        list(APPEND ${name}_extra_args "-D${new_name}=${${variableName}}")
+        string(REPLACE ";" "|" new_value "${${variableName}}")
+        list(APPEND ${name}_extra_args "-D${new_name}=${new_value}")
       endif()
     endforeach()
 
-    if(NOT RUNTIMES_${name}_LLVM_ENABLE_RUNTIMES)
-      string(REPLACE ";" "|" LLVM_ENABLE_RUNTIMES_PASSTHROUGH "${LLVM_ENABLE_RUNTIMES}")
-      list(APPEND ${name}_extra_args -DLLVM_ENABLE_RUNTIMES=${LLVM_ENABLE_RUNTIMES_PASSTHROUGH})
-    endif()
-
     if(target IN_LIST LLVM_RUNTIME_BUILD_ID_LINK_TARGETS)
       list(APPEND EXTRA_ARGS STRIP_TOOL ${CMAKE_CURRENT_BINARY_DIR}/llvm-strip-link)
     endif()