You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.7 KiB
74 lines
2.7 KiB
4 months ago
|
## 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)
|
||
|
|
|
||
|
|
# String used to cache failed CXX flags.
|
||
|
|
set(LIBWEBM_FAILED_CXX_FLAGS)
|
||
|
|
|
||
|
|
# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
|
||
|
|
# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
|
||
|
|
# $LIBWEBM_FAILED_CXX_FLAGS when the test fails.
|
||
|
|
function (add_cxx_flag_if_supported cxx_flag)
|
||
|
|
unset(CXX_FLAG_FOUND CACHE)
|
||
|
|
string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
|
||
|
|
unset(CXX_FLAG_FAILED CACHE)
|
||
|
|
string(FIND "${LIBWEBM_FAILED_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FAILED)
|
||
|
|
|
||
|
|
if (${CXX_FLAG_FOUND} EQUAL -1 AND ${CXX_FLAG_FAILED} EQUAL -1)
|
||
|
|
unset(CXX_FLAG_SUPPORTED CACHE)
|
||
|
|
message("Checking CXX compiler flag support for: " ${cxx_flag})
|
||
|
|
check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
|
||
|
|
if (CXX_FLAG_SUPPORTED)
|
||
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING ""
|
||
|
|
FORCE)
|
||
|
|
else ()
|
||
|
|
set(LIBWEBM_FAILED_CXX_FLAGS "${LIBWEBM_FAILED_CXX_FLAGS} ${cxx_flag}"
|
||
|
|
CACHE STRING "" FORCE)
|
||
|
|
endif ()
|
||
|
|
endif ()
|
||
|
|
endfunction ()
|
||
|
|
|
||
|
|
# Checks CXX compiler for support of $cxx_flag and terminates generation when
|
||
|
|
# support is not present.
|
||
|
|
function (require_cxx_flag cxx_flag)
|
||
|
|
unset(CXX_FLAG_FOUND CACHE)
|
||
|
|
string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
|
||
|
|
|
||
|
|
if (${CXX_FLAG_FOUND} EQUAL -1)
|
||
|
|
unset(LIBWEBM_HAVE_CXX_FLAG CACHE)
|
||
|
|
message("Checking CXX compiler flag support for: " ${cxx_flag})
|
||
|
|
check_cxx_compiler_flag("${cxx_flag}" LIBWEBM_HAVE_CXX_FLAG)
|
||
|
|
if (NOT LIBWEBM_HAVE_CXX_FLAG)
|
||
|
|
message(FATAL_ERROR
|
||
|
|
"${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
|
||
|
|
endif ()
|
||
|
|
set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING "" FORCE)
|
||
|
|
endif ()
|
||
|
|
endfunction ()
|
||
|
|
|
||
|
|
# Checks only non-MSVC targets for support of $cxx_flag.
|
||
|
|
function (require_cxx_flag_nomsvc cxx_flag)
|
||
|
|
if (NOT MSVC)
|
||
|
|
require_cxx_flag(${cxx_flag})
|
||
|
|
endif ()
|
||
|
|
endfunction ()
|
||
|
|
|
||
|
|
# Adds $preproc_def to CXX compiler command line (as -D$preproc_def) if not
|
||
|
|
# already present.
|
||
|
|
function (add_cxx_preproc_definition preproc_def)
|
||
|
|
unset(PREPROC_DEF_FOUND CACHE)
|
||
|
|
string(FIND "${CMAKE_CXX_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
|
||
|
|
|
||
|
|
if (${PREPROC_DEF_FOUND} EQUAL -1)
|
||
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D${preproc_def}" CACHE STRING ""
|
||
|
|
FORCE)
|
||
|
|
endif ()
|
||
|
|
endfunction ()
|