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