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254
module/jni/libcxx/cmake/Modules/HandleLibcxxFlags.cmake
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254
module/jni/libcxx/cmake/Modules/HandleLibcxxFlags.cmake
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# HandleLibcxxFlags - A set of macros used to setup the flags used to compile
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# and link libc++. These macros add flags to the following CMake variables.
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# - LIBCXX_COMPILE_FLAGS: flags used to compile libc++
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# - LIBCXX_LINK_FLAGS: flags used to link libc++
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# - LIBCXX_LIBRARIES: libraries to link libc++ to.
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include(CheckCXXCompilerFlag)
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unset(add_flag_if_supported)
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# Mangle the name of a compiler flag into a valid CMake identifier.
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# Ex: --std=c++11 -> STD_EQ_CXX11
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macro(mangle_name str output)
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string(STRIP "${str}" strippedStr)
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string(REGEX REPLACE "^/" "" strippedStr "${strippedStr}")
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string(REGEX REPLACE "^-+" "" strippedStr "${strippedStr}")
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string(REGEX REPLACE "-+$" "" strippedStr "${strippedStr}")
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string(REPLACE "-" "_" strippedStr "${strippedStr}")
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string(REPLACE ":" "_COLON_" strippedStr "${strippedStr}")
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string(REPLACE "=" "_EQ_" strippedStr "${strippedStr}")
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string(REPLACE "+" "X" strippedStr "${strippedStr}")
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string(TOUPPER "${strippedStr}" ${output})
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endmacro()
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# Remove a list of flags from all CMake variables that affect compile flags.
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# This can be used to remove unwanted flags specified on the command line
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# or added in other parts of LLVM's cmake configuration.
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macro(remove_flags)
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foreach(var ${ARGN})
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string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
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string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
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string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
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string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
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string(REPLACE "${var}" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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string(REPLACE "${var}" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
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string(REPLACE "${var}" "" CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
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string(REPLACE "${var}" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
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string(REPLACE "${var}" "" CMAKE_SHARED_MODULE_FLAGS "${CMAKE_SHARED_MODULE_FLAGS}")
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remove_definitions(${var})
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endforeach()
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endmacro(remove_flags)
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macro(check_flag_supported flag)
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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endmacro()
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macro(append_flags DEST)
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foreach(value ${ARGN})
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list(APPEND ${DEST} ${value})
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list(APPEND ${DEST} ${value})
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endforeach()
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endmacro()
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# If the specified 'condition' is true then append the specified list of flags to DEST
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macro(append_flags_if condition DEST)
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if (${condition})
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list(APPEND ${DEST} ${ARGN})
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endif()
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endmacro()
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# Add each flag in the list specified by DEST if that flag is supported by the current compiler.
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macro(append_flags_if_supported DEST)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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append_flags_if(CXX_SUPPORTS_${flagname}_FLAG ${DEST} ${flag})
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endforeach()
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endmacro()
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# Add a macro definition if condition is true.
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macro(define_if condition def)
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if (${condition})
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add_definitions(${def})
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endif()
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endmacro()
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# Add a macro definition if condition is not true.
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macro(define_if_not condition def)
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if (NOT ${condition})
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add_definitions(${def})
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endif()
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endmacro()
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# Add a macro definition to the __config_site file if the specified condition
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# is 'true'. Note that '-D${def}' is not added. Instead it is expected that
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# the build include the '__config_site' header.
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macro(config_define_if condition def)
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if (${condition})
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set(${def} ON)
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endif()
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endmacro()
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macro(config_define_if_not condition def)
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if (NOT ${condition})
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set(${def} ON)
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endif()
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endmacro()
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macro(config_define value def)
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set(${def} ${value})
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endmacro()
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# Add a list of flags to all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS',
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# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'.
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macro(add_target_flags)
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foreach(value ${ARGN})
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${value}")
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${value}")
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list(APPEND LIBCXX_COMPILE_FLAGS ${value})
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list(APPEND LIBCXX_LINK_FLAGS ${value})
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endforeach()
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endmacro()
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# If the specified 'condition' is true then add a list of flags to
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# all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS', 'LIBCXX_COMPILE_FLAGS'
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# and 'LIBCXX_LINK_FLAGS'.
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macro(add_target_flags_if condition)
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if (${condition})
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add_target_flags(${ARGN})
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endif()
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endmacro()
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# Add all the flags supported by the compiler to all of
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# 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS', 'LIBCXX_COMPILE_FLAGS'
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# and 'LIBCXX_LINK_FLAGS'.
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macro(add_target_flags_if_supported)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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add_target_flags_if(CXX_SUPPORTS_${flagname}_FLAG ${flag})
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endforeach()
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endmacro()
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# Add a specified list of flags to both 'LIBCXX_COMPILE_FLAGS' and
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# 'LIBCXX_LINK_FLAGS'.
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macro(add_flags)
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foreach(value ${ARGN})
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list(APPEND LIBCXX_COMPILE_FLAGS ${value})
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list(APPEND LIBCXX_LINK_FLAGS ${value})
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endforeach()
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endmacro()
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# If the specified 'condition' is true then add a list of flags to both
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# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'.
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macro(add_flags_if condition)
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if (${condition})
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add_flags(${ARGN})
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endif()
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endmacro()
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# Add each flag in the list to LIBCXX_COMPILE_FLAGS and LIBCXX_LINK_FLAGS
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# if that flag is supported by the current compiler.
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macro(add_flags_if_supported)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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add_flags_if(CXX_SUPPORTS_${flagname}_FLAG ${flag})
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endforeach()
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endmacro()
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# Add a list of flags to 'LIBCXX_COMPILE_FLAGS'.
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macro(add_compile_flags)
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foreach(f ${ARGN})
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list(APPEND LIBCXX_COMPILE_FLAGS ${f})
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endforeach()
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endmacro()
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# If 'condition' is true then add the specified list of flags to
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# 'LIBCXX_COMPILE_FLAGS'
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macro(add_compile_flags_if condition)
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if (${condition})
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add_compile_flags(${ARGN})
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endif()
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endmacro()
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# For each specified flag, add that flag to 'LIBCXX_COMPILE_FLAGS' if the
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# flag is supported by the C++ compiler.
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macro(add_compile_flags_if_supported)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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add_compile_flags_if(CXX_SUPPORTS_${flagname}_FLAG ${flag})
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endforeach()
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endmacro()
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# Add a list of flags to 'LIBCXX_LINK_FLAGS'.
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macro(add_link_flags)
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foreach(f ${ARGN})
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list(APPEND LIBCXX_LINK_FLAGS ${f})
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endforeach()
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endmacro()
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# If 'condition' is true then add the specified list of flags to
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# 'LIBCXX_LINK_FLAGS'
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macro(add_link_flags_if condition)
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if (${condition})
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add_link_flags(${ARGN})
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endif()
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endmacro()
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# For each specified flag, add that flag to 'LIBCXX_LINK_FLAGS' if the
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# flag is supported by the C++ compiler.
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macro(add_link_flags_if_supported)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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add_link_flags_if(CXX_SUPPORTS_${flagname}_FLAG ${flag})
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endforeach()
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endmacro()
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# Add a list of libraries or link flags to 'LIBCXX_LIBRARIES'.
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macro(add_library_flags)
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foreach(lib ${ARGN})
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list(APPEND LIBCXX_LIBRARIES ${lib})
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endforeach()
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endmacro()
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# if 'condition' is true then add the specified list of libraries and flags
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# to 'LIBCXX_LIBRARIES'.
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macro(add_library_flags_if condition)
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if(${condition})
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add_library_flags(${ARGN})
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endif()
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endmacro()
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# Turn a comma separated CMake list into a space separated string.
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macro(split_list listname)
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string(REPLACE ";" " " ${listname} "${${listname}}")
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endmacro()
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# For each specified flag, add that link flag to the provided target.
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# The flags are added with the given visibility, i.e. PUBLIC|PRIVATE|INTERFACE.
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function(target_add_link_flags_if_supported target visibility)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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if (CXX_SUPPORTS_${flagname}_FLAG)
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target_link_libraries(${target} ${visibility} ${flag})
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endif()
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endforeach()
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endfunction()
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# For each specified flag, add that compile flag to the provided target.
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# The flags are added with the given visibility, i.e. PUBLIC|PRIVATE|INTERFACE.
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function(target_add_compile_flags_if_supported target visibility)
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foreach(flag ${ARGN})
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mangle_name("${flag}" flagname)
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check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG")
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if (CXX_SUPPORTS_${flagname}_FLAG)
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target_compile_options(${target} ${visibility} ${flag})
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endif()
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endforeach()
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endfunction()
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