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Import aom library
This is the reference implementation for the Alliance for Open Media's av1 video code. The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.
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trav90
Roy Tam
parent
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989 changed files with 470949 additions and 0 deletions
218
third_party/aom/build/cmake/compiler_flags.cmake
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third_party/aom/build/cmake/compiler_flags.cmake
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##
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## Copyright (c) 2016, Alliance for Open Media. All rights reserved
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##
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## This source code is subject to the terms of the BSD 2 Clause License and
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## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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## was not distributed with this source code in the LICENSE file, you can
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## obtain it at www.aomedia.org/license/software. If the Alliance for Open
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## Media Patent License 1.0 was not distributed with this source code in the
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## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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##
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include(CheckCCompilerFlag)
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include(CheckCXXCompilerFlag)
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# Strings used to cache failed C/CXX flags.
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set(AOM_FAILED_C_FLAGS)
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set(AOM_FAILED_CXX_FLAGS)
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# Checks C compiler for support of $c_flag. Adds $c_flag to $CMAKE_C_FLAGS when
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# the compile test passes. Caches $c_flag in $AOM_FAILED_C_FLAGS when the test
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# fails.
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function (add_c_flag_if_supported c_flag)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
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unset(C_FLAG_FAILED CACHE)
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string(FIND "${AOM_FAILED_C_FLAGS}" "${c_flag}" C_FLAG_FAILED)
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if (${C_FLAG_FOUND} EQUAL -1 AND ${C_FLAG_FAILED} EQUAL -1)
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unset(C_FLAG_SUPPORTED CACHE)
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message("Checking C compiler flag support for: " ${c_flag})
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check_c_compiler_flag("${c_flag}" C_FLAG_SUPPORTED)
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if (C_FLAG_SUPPORTED)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "" FORCE)
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else ()
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set(AOM_FAILED_C_FLAGS "${AOM_FAILED_C_FLAGS} ${c_flag}" CACHE STRING ""
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FORCE)
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endif ()
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endif ()
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endfunction ()
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# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
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# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
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# $AOM_FAILED_CXX_FLAGS when the test fails.
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function (add_cxx_flag_if_supported cxx_flag)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
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unset(CXX_FLAG_FAILED CACHE)
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string(FIND "${AOM_FAILED_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FAILED)
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if (${CXX_FLAG_FOUND} EQUAL -1 AND ${CXX_FLAG_FAILED} EQUAL -1)
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unset(CXX_FLAG_SUPPORTED CACHE)
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message("Checking CXX compiler flag support for: " ${cxx_flag})
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check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
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if (CXX_FLAG_SUPPORTED)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING ""
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FORCE)
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else()
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set(AOM_FAILED_CXX_FLAGS "${AOM_FAILED_CXX_FLAGS} ${cxx_flag}" CACHE
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STRING "" FORCE)
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endif ()
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endif ()
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endfunction ()
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# Convenience method for adding a flag to both the C and C++ compiler command
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# lines.
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function (add_compiler_flag_if_supported flag)
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add_c_flag_if_supported(${flag})
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add_cxx_flag_if_supported(${flag})
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endfunction ()
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# Checks C compiler for support of $c_flag and terminates generation when
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# support is not present.
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function (require_c_flag c_flag update_c_flags)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
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if (${C_FLAG_FOUND} EQUAL -1)
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unset(HAVE_C_FLAG CACHE)
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message("Checking C compiler flag support for: " ${c_flag})
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check_c_compiler_flag("${c_flag}" HAVE_C_FLAG)
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if (NOT HAVE_C_FLAG)
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message(FATAL_ERROR
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"${PROJECT_NAME} requires support for C flag: ${c_flag}.")
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endif ()
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if (update_c_flags)
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set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)
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endif ()
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endif ()
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endfunction ()
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# Checks CXX compiler for support of $cxx_flag and terminates generation when
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# support is not present.
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function (require_cxx_flag cxx_flag update_cxx_flags)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
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if (${CXX_FLAG_FOUND} EQUAL -1)
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unset(HAVE_CXX_FLAG CACHE)
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message("Checking CXX compiler flag support for: " ${cxx_flag})
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check_cxx_compiler_flag("${cxx_flag}" HAVE_CXX_FLAG)
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if (NOT HAVE_CXX_FLAG)
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message(FATAL_ERROR
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"${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
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endif ()
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if (update_cxx_flags)
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set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING ""
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FORCE)
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endif ()
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endif ()
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endfunction ()
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# Checks for support of $flag by both the C and CXX compilers. Terminates
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# generation when support is not present in both compilers.
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function (require_flag flag update_cmake_flags)
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require_c_flag(${flag} ${update_cmake_flags})
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require_cxx_flag(${flag} ${update_cmake_flags})
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endfunction ()
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# Checks only non-MSVC targets for support of $c_flag and terminates generation
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# when support is not present.
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function (require_c_flag_nomsvc c_flag update_c_flags)
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if (NOT MSVC)
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require_c_flag(${c_flag} ${update_c_flags})
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endif ()
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endfunction ()
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# Checks only non-MSVC targets for support of $cxx_flag and terminates
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# generation when support is not present.
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function (require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
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if (NOT MSVC)
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require_cxx_flag(${cxx_flag} ${update_cxx_flags})
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endif ()
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endfunction ()
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# Checks only non-MSVC targets for support of $flag by both the C and CXX
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# compilers. Terminates generation when support is not present in both
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# compilers.
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function (require_flag_nomsvc flag update_cmake_flags)
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require_c_flag_nomsvc(${flag} ${update_cmake_flags})
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require_cxx_flag_nomsvc(${flag} ${update_cmake_flags})
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endfunction ()
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# Adds $preproc_def to C compiler command line (as -D$preproc_def) if not
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# already present.
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function (add_c_preproc_definition preproc_def)
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unset(PREPROC_DEF_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
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if (${PREPROC_DEF_FOUND} EQUAL -1)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D${preproc_def}" CACHE STRING ""
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FORCE)
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endif ()
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endfunction ()
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# Adds $preproc_def to CXX compiler command line (as -D$preproc_def) if not
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# already present.
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function (add_cxx_preproc_definition preproc_def)
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unset(PREPROC_DEF_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
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if (${PREPROC_DEF_FOUND} EQUAL -1)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D${preproc_def}" CACHE STRING ""
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FORCE)
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endif ()
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endfunction ()
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# Adds $preproc_def to C and CXX compiler command line (as -D$preproc_def) if
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# not already present.
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function (add_preproc_definition preproc_def)
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add_c_preproc_definition(${preproc_def})
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add_cxx_preproc_definition(${preproc_def})
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endfunction ()
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# Adds $flag to assembler command line.
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function (append_as_flag flag)
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unset(AS_FLAG_FOUND CACHE)
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string(FIND "${AOM_AS_FLAGS}" "${flag}" AS_FLAG_FOUND)
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if (${AS_FLAG_FOUND} EQUAL -1)
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set(AOM_AS_FLAGS "${AOM_AS_FLAGS} ${flag}" CACHE STRING "" FORCE)
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endif ()
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endfunction ()
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# Adds $flag to the C compiler command line.
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function (append_c_flag flag)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${flag}" C_FLAG_FOUND)
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if (${C_FLAG_FOUND} EQUAL -1)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" CACHE STRING "" FORCE)
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endif ()
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endfunction ()
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# Adds $flag to the CXX compiler command line.
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function (append_cxx_flag flag)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" CXX_FLAG_FOUND)
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if (${CXX_FLAG_FOUND} EQUAL -1)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" CACHE STRING "" FORCE)
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endif ()
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endfunction ()
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# Adds $flag to the C and CXX compiler command lines.
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function (append_compiler_flag flag)
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append_c_flag(${flag})
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append_cxx_flag(${flag})
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endfunction ()
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# Adds $flag to the executable linker command line.
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function (append_exe_linker_flag flag)
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unset(LINKER_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_EXE_LINKER_FLAGS}" "${flag}" LINKER_FLAG_FOUND)
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if (${LINKER_FLAG_FOUND} EQUAL -1)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}" CACHE STRING
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"" FORCE)
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endif ()
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endfunction ()
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