2016-04-07 10:06:31 -07:00
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## Copyright (c) 2016 The WebM project authors. All Rights Reserved.
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##
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## Use of this source code is governed by a BSD-style license
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## that can be found in the LICENSE file in the root of the source
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## tree. An additional intellectual property rights grant can be found
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## in the file PATENTS. All contributing project authors may
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## be found in the AUTHORS file in the root of the source tree.
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cmake_minimum_required(VERSION 3.2)
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include(CheckCXXCompilerFlag)
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function (add_cxx_flag_if_supported cxx_flag)
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unset(FLAG_SUPPORTED CACHE)
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2016-04-21 16:48:40 -07:00
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message("Checking compiler flag support for: " ${cxx_flag})
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2016-04-07 10:06:31 -07:00
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CHECK_CXX_COMPILER_FLAG("${cxx_flag}" FLAG_SUPPORTED)
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if (FLAG_SUPPORTED)
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set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING "" FORCE)
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endif ()
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endfunction ()
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# Set warning levels.
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if (MSVC)
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add_cxx_flag_if_supported("/W4")
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# Disable MSVC warnings that suggest making code non-portable.
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add_cxx_flag_if_supported("/wd4996")
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if (ENABLE_WERROR)
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add_cxx_flag_if_supported("/WX")
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endif ()
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else ()
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add_cxx_flag_if_supported("-Wall")
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add_cxx_flag_if_supported("-Wextra")
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add_cxx_flag_if_supported("-Wno-deprecated")
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add_cxx_flag_if_supported("-Wshorten-64-to-32")
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add_cxx_flag_if_supported("-Wnarrowing")
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if (ENABLE_WERROR)
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add_cxx_flag_if_supported("-Werror")
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endif ()
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endif ()
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