| ## Copyright (c) 2016 The WebM project authors. All Rights Reserved. |
| ## |
| ## Use of this source code is governed by a BSD-style license |
| ## that can be found in the LICENSE file in the root of the source |
| ## tree. An additional intellectual property rights grant can be found |
| ## in the file PATENTS. All contributing project authors may |
| ## be found in the AUTHORS file in the root of the source tree. |
| cmake_minimum_required(VERSION 3.2) |
| |
| include(CheckCXXCompilerFlag) |
| |
| function (add_cxx_flag_if_supported cxx_flag) |
| unset(FLAG_SUPPORTED CACHE) |
| message("Checking compiler flag support for: " ${cxx_flag}) |
| CHECK_CXX_COMPILER_FLAG("${cxx_flag}" FLAG_SUPPORTED) |
| if (FLAG_SUPPORTED) |
| set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING "" FORCE) |
| endif () |
| endfunction () |
| |
| # Set warning levels. |
| if (MSVC) |
| add_cxx_flag_if_supported("/W4") |
| # Disable MSVC warnings that suggest making code non-portable. |
| add_cxx_flag_if_supported("/wd4996") |
| if (ENABLE_WERROR) |
| add_cxx_flag_if_supported("/WX") |
| endif () |
| else () |
| add_cxx_flag_if_supported("-Wall") |
| add_cxx_flag_if_supported("-Wextra") |
| add_cxx_flag_if_supported("-Wno-deprecated") |
| add_cxx_flag_if_supported("-Wshorten-64-to-32") |
| add_cxx_flag_if_supported("-Wnarrowing") |
| if (ENABLE_WERROR) |
| add_cxx_flag_if_supported("-Werror") |
| endif () |
| endif () |
