message: cmake: Make -DWEVERYTHING option available to Clang only
diff: @@ -52,6 +52,7 @@ cable_add_cxx_compiler_flag_if_supported(-Wduplicated-cond)
  cable_add_cxx_compiler_flag_if_supported(-Wduplicate-enum)
  cable_add_cxx_compiler_flag_if_supported(-Wlogical-op)
  +if(CMAKE_CXX_COMPILER_ID MATCHES Clang)
  option(WEVERYTHING "Enable almost all compiler warnings" OFF)
  if(WEVERYTHING)
  add_compile_options(-Weverything)
  @@ -66,6 +67,7 @@ if(WEVERYTHING)
  -Wno-switch-enum
  )
  endif()
  +endif()
  if(SANITIZE MATCHES address)
  # Enables ASan-powered checks in std::vector in libstdc++.
  