Update CMakeLists.txt

Author: Gogoshika-ga

CMakeLists.txt

@@ -197,7 +197,7 @@ elseif(APPLE)
 elseif(LINUX)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGUID_STDLIB -std=c++17")
 
-    if(CLANG)
+    if (CMAKE_CXX_COMPILER MATCHES "clang")
         message(STATUS "Detected Clang compiler: ${CMAKE_CXX_COMPILER}")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
     endif()