Cleaner flag setting.

Author: lemire

CMakeLists.txt

@@ -4,9 +4,6 @@ project(fast_float VERSION 1.0.0 LANGUAGES CXX)
 option(FASTFLOAT_TEST "Enable tests" OFF)
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-if(MSVC_VERSION GREATER 1910)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -permissive-")
-endif()
 if(FASTFLOAT_TEST)
   enable_testing()
   add_subdirectory(tests)
@@ -40,6 +37,10 @@ if(FASTFLOAT_SANITIZE)
     target_link_libraries(fast_float INTERFACE -fuse-ld=gold)
   endif()
 endif()
+if(MSVC_VERSION GREATER 1910)
+  target_compile_options(fast_float INTERFACE /permissive-)
+endif()
+
 
 include(CMakePackageConfigHelpers)