Merge pull request #305 from dankmeme01/main

fix /permissive- flag causing a compile error on clang for windows

Author: lemire

CMakeLists.txt

@@ -55,11 +55,15 @@ if(FASTFLOAT_SANITIZE)
     target_link_libraries(fast_float INTERFACE -fuse-ld=gold)
   endif()
 endif()
-if(MSVC_VERSION GREATER 1910)
+
+include(CheckCXXCompilerFlag)
+unset(FASTFLOAT_COMPILER_SUPPORTS_PERMISSIVE)
+CHECK_CXX_COMPILER_FLAG(/permissive- FASTFLOAT_COMPILER_SUPPORTS_PERMISSIVE)
+
+if(FASTFLOAT_COMPILER_SUPPORTS_PERMISSIVE)
   target_compile_options(fast_float INTERFACE /permissive-)
 endif()
 
-
 if(FASTFLOAT_INSTALL)
   include(CMakePackageConfigHelpers)