No need to use REGEX in string REPLACE

interpreter/CMakeLists.txt

@@ -63,8 +63,8 @@ endif()
 
 if(MSVC)
   # replace dashes in the -EH* and -GR* flags with slashes (/EH* /GR*)
-  string(REGEX REPLACE "(^| ) *-EH" " /EH" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  string(REGEX REPLACE "(^| ) *-GR" " /GR" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  string(REPLACE " -EH" " /EH" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  string(REPLACE " -GR" " /GR" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 endif()
 
 set(LLVM_TARGETS_TO_BUILD ${ROOT_CLING_TARGET} CACHE STRING "Semicolon-separated list of targets to build, or \"all\".")