Files
libcxx/cmake/Modules/HandleLibcxxFlags.cmake
Eric Fiselier 2d7654ea66 Add cxx-benchmark-unittests target
This patch adds the cxx-benchmark-unittests target so we can start
getting test coverage on the benchmarks, including building with
sanitizers. Because we're only looking for test-coverage, the benchmarks
run for the shortest time possible, and in parallel.

The target is excluded from all by default. It only
builds and runs the libcxx configurations of the benchmarks, and not
any versions built against the systems native standard library.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@346811 91177308-0d34-0410-b5e6-96231b3b80d8
2018-11-13 23:08:31 +00:00

231 lines
7.4 KiB
CMake

# HandleLibcxxFlags - A set of macros used to setup the flags used to compile
# and link libc++. These macros add flags to the following CMake variables.
# - LIBCXX_COMPILE_FLAGS: flags used to compile libc++
# - LIBCXX_LINK_FLAGS: flags used to link libc++
# - LIBCXX_LIBRARIES: libraries to link libc++ to.
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 ":" "_COLON_" 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}" "LIBCXX_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("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
append_flags_if(LIBCXX_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)
set(LIBCXX_NEEDS_SITE_CONFIG ON)
endif()
endmacro()
macro(config_define_if_not condition def)
if (NOT ${condition})
set(${def} ON)
set(LIBCXX_NEEDS_SITE_CONFIG ON)
endif()
endmacro()
macro(config_define value def)
set(${def} ${value})
set(LIBCXX_NEEDS_SITE_CONFIG ON)
endmacro()
# Add a list of flags to all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS',
# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'.
macro(add_target_flags)
foreach(value ${ARGN})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${value}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${value}")
list(APPEND LIBCXX_COMPILE_FLAGS ${value})
list(APPEND LIBCXX_LINK_FLAGS ${value})
endforeach()
endmacro()
# If the specified 'condition' is true then add a list of flags to
# all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS', 'LIBCXX_COMPILE_FLAGS'
# and 'LIBCXX_LINK_FLAGS'.
macro(add_target_flags_if condition)
if (${condition})
add_target_flags(${ARGN})
endif()
endmacro()
# Add a specified list of flags to both 'LIBCXX_COMPILE_FLAGS' and
# 'LIBCXX_LINK_FLAGS'.
macro(add_flags)
foreach(value ${ARGN})
list(APPEND LIBCXX_COMPILE_FLAGS ${value})
list(APPEND LIBCXX_LINK_FLAGS ${value})
endforeach()
endmacro()
# If the specified 'condition' is true then add a list of flags to both
# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'.
macro(add_flags_if condition)
if (${condition})
add_flags(${ARGN})
endif()
endmacro()
# Add each flag in the list to LIBCXX_COMPILE_FLAGS and LIBCXX_LINK_FLAGS
# if that flag is supported by the current compiler.
macro(add_flags_if_supported)
foreach(flag ${ARGN})
mangle_name("${flag}" flagname)
check_cxx_compiler_flag("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
add_flags_if(LIBCXX_SUPPORTS_${flagname}_FLAG ${flag})
endforeach()
endmacro()
# Add a list of flags to 'LIBCXX_COMPILE_FLAGS'.
macro(add_compile_flags)
foreach(f ${ARGN})
list(APPEND LIBCXX_COMPILE_FLAGS ${f})
endforeach()
endmacro()
# If 'condition' is true then add the specified list of flags to
# 'LIBCXX_COMPILE_FLAGS'
macro(add_compile_flags_if condition)
if (${condition})
add_compile_flags(${ARGN})
endif()
endmacro()
# For each specified flag, add that flag to 'LIBCXX_COMPILE_FLAGS' if the
# flag is supported by the C++ compiler.
macro(add_compile_flags_if_supported)
foreach(flag ${ARGN})
mangle_name("${flag}" flagname)
check_cxx_compiler_flag("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
add_compile_flags_if(LIBCXX_SUPPORTS_${flagname}_FLAG ${flag})
endforeach()
endmacro()
# Add a list of flags to 'LIBCXX_LINK_FLAGS'.
macro(add_link_flags)
foreach(f ${ARGN})
list(APPEND LIBCXX_LINK_FLAGS ${f})
endforeach()
endmacro()
# If 'condition' is true then add the specified list of flags to
# 'LIBCXX_LINK_FLAGS'
macro(add_link_flags_if condition)
if (${condition})
add_link_flags(${ARGN})
endif()
endmacro()
# For each specified flag, add that flag to 'LIBCXX_LINK_FLAGS' if the
# flag is supported by the C++ compiler.
macro(add_link_flags_if_supported)
foreach(flag ${ARGN})
mangle_name("${flag}" flagname)
check_cxx_compiler_flag("${flag}" "LIBCXX_SUPPORTS_${flagname}_FLAG")
add_link_flags_if(LIBCXX_SUPPORTS_${flagname}_FLAG ${flag})
endforeach()
endmacro()
# Add a list of libraries or link flags to 'LIBCXX_LIBRARIES'.
macro(add_library_flags)
foreach(lib ${ARGN})
list(APPEND LIBCXX_LIBRARIES ${lib})
endforeach()
endmacro()
# if 'condition' is true then add the specified list of libraries and flags
# to 'LIBCXX_LIBRARIES'.
macro(add_library_flags_if condition)
if(${condition})
add_library_flags(${ARGN})
endif()
endmacro()
# Add a list of libraries or link flags to 'LIBCXX_LIBRARIES'.
macro(add_interface_library)
foreach(lib ${ARGN})
list(APPEND LIBCXX_LIBRARIES ${lib})
list(APPEND LIBCXX_INTERFACE_LIBRARIES ${lib})
endforeach()
endmacro()
# Turn a comma separated CMake list into a space separated string.
macro(split_list listname)
string(REPLACE ";" " " ${listname} "${${listname}}")
endmacro()