Make -fPIC flag global

Author: flexferrum

CMakeLists.txt

@@ -79,8 +79,7 @@ endif()
 
 if (UNIX)
     if (JINJA2CPP_PIC OR CONAN_CMAKE_POSITION_INDEPENDENT_CODE)
-        set(GCC_CXX_FLAGS ${GCC_CXX_FLAGS} -fPIC)
-        set(CLANG_CXX_FLAGS ${CLANG_CXX_FLAGS} -fPIC)
+        set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} -fPIC)
     endif ()
 
     if (DEFINED CONAN_SHARED_LINKER_FLAGS)