mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-14 17:43:53 +00:00
2a2f52201d
* fix: find_import didn't work properly for classic tools * ci: fix all files not being checked in style run
386 lines
13 KiB
CMake
386 lines
13 KiB
CMake
#[======================================================[.rst
|
|
|
|
Adds the following targets::
|
|
|
|
pybind11::pybind11 - link to headers and pybind11
|
|
pybind11::module - Adds module links
|
|
pybind11::embed - Adds embed links
|
|
pybind11::lto - Link time optimizations (manual selection)
|
|
pybind11::thin_lto - Link time optimizations (manual selection)
|
|
pybind11::python_link_helper - Adds link to Python libraries
|
|
pybind11::python2_no_register - Avoid warning/error with Python 2 + C++14/7
|
|
pybind11::windows_extras - MSVC bigobj and mp for building multithreaded
|
|
pybind11::opt_size - avoid optimizations that increase code size
|
|
|
|
Adds the following functions::
|
|
|
|
pybind11_strip(target) - strip target after building on linux/macOS
|
|
pybind11_find_import(module) - See if a module is installed.
|
|
|
|
#]======================================================]
|
|
|
|
# CMake 3.10 has an include_guard command, but we can't use that yet
|
|
if(TARGET pybind11::lto)
|
|
return()
|
|
endif()
|
|
|
|
# If we are in subdirectory mode, all IMPORTED targets must be GLOBAL. If we
|
|
# are in CONFIG mode, they should be "normal" targets instead.
|
|
# In CMake 3.11+ you can promote a target to global after you create it,
|
|
# which might be simpler than this check.
|
|
get_property(
|
|
is_config
|
|
TARGET pybind11::headers
|
|
PROPERTY IMPORTED)
|
|
if(NOT is_config)
|
|
set(optional_global GLOBAL)
|
|
endif()
|
|
|
|
# --------------------- Shared targets ----------------------------
|
|
|
|
# Build an interface library target:
|
|
add_library(pybind11::pybind11 IMPORTED INTERFACE ${optional_global})
|
|
set_property(
|
|
TARGET pybind11::pybind11
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_LIBRARIES pybind11::headers)
|
|
|
|
# Build a module target:
|
|
add_library(pybind11::module IMPORTED INTERFACE ${optional_global})
|
|
set_property(
|
|
TARGET pybind11::module
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_LIBRARIES pybind11::pybind11)
|
|
|
|
# Build an embed library target:
|
|
add_library(pybind11::embed IMPORTED INTERFACE ${optional_global})
|
|
set_property(
|
|
TARGET pybind11::embed
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_LIBRARIES pybind11::pybind11)
|
|
|
|
# ----------------------- no register ----------------------
|
|
|
|
# Workaround for Python 2.7 and C++17 (C++14 as a warning) incompatibility
|
|
# This adds the flags -Wno-register and -Wno-deprecated-register if the compiler
|
|
# is Clang 3.9+ or AppleClang and the compile language is CXX, or /wd5033 for MSVC (all languages,
|
|
# since MSVC didn't recognize COMPILE_LANGUAGE until CMake 3.11+).
|
|
|
|
add_library(pybind11::python2_no_register INTERFACE IMPORTED ${optional_global})
|
|
set(clang_4plus
|
|
"$<AND:$<CXX_COMPILER_ID:Clang>,$<NOT:$<VERSION_LESS:$<CXX_COMPILER_VERSION>,3.9>>>")
|
|
set(no_register "$<OR:${clang_4plus},$<CXX_COMPILER_ID:AppleClang>>")
|
|
|
|
if(MSVC AND CMAKE_VERSION VERSION_LESS 3.11)
|
|
set(cxx_no_register "${no_register}")
|
|
else()
|
|
set(cxx_no_register "$<AND:$<COMPILE_LANGUAGE:CXX>,${no_register}>")
|
|
endif()
|
|
|
|
set(msvc "$<CXX_COMPILER_ID:MSVC>")
|
|
|
|
set_property(
|
|
TARGET pybind11::python2_no_register
|
|
PROPERTY INTERFACE_COMPILE_OPTIONS
|
|
"$<${cxx_no_register}:-Wno-register;-Wno-deprecated-register>" "$<${msvc}:/wd5033>")
|
|
|
|
# --------------------------- link helper ---------------------------
|
|
|
|
add_library(pybind11::python_link_helper IMPORTED INTERFACE ${optional_global})
|
|
|
|
if(CMAKE_VERSION VERSION_LESS 3.13)
|
|
# In CMake 3.11+, you can set INTERFACE properties via the normal methods, and
|
|
# this would be simpler.
|
|
set_property(
|
|
TARGET pybind11::python_link_helper
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_LIBRARIES "$<$<PLATFORM_ID:Darwin>:-undefined dynamic_lookup>")
|
|
else()
|
|
# link_options was added in 3.13+
|
|
# This is safer, because you are ensured the deduplication pass in CMake will not consider
|
|
# these separate and remove one but not the other.
|
|
set_property(
|
|
TARGET pybind11::python_link_helper
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_OPTIONS "$<$<PLATFORM_ID:Darwin>:LINKER:-undefined,dynamic_lookup>")
|
|
endif()
|
|
|
|
# ------------------------ Windows extras -------------------------
|
|
|
|
add_library(pybind11::windows_extras IMPORTED INTERFACE ${optional_global})
|
|
|
|
if(MSVC)
|
|
# /MP enables multithreaded builds (relevant when there are many files), /bigobj is
|
|
# needed for bigger binding projects due to the limit to 64k addressable sections
|
|
set_property(
|
|
TARGET pybind11::windows_extras
|
|
APPEND
|
|
PROPERTY INTERFACE_COMPILE_OPTIONS /bigobj)
|
|
|
|
if(CMAKE_VERSION VERSION_LESS 3.11)
|
|
set_property(
|
|
TARGET pybind11::windows_extras
|
|
APPEND
|
|
PROPERTY INTERFACE_COMPILE_OPTIONS $<$<NOT:$<CONFIG:Debug>>:/MP>)
|
|
else()
|
|
# Only set these options for C++ files. This is important so that, for
|
|
# instance, projects that include other types of source files like CUDA
|
|
# .cu files don't get these options propagated to nvcc since that would
|
|
# cause the build to fail.
|
|
set_property(
|
|
TARGET pybind11::windows_extras
|
|
APPEND
|
|
PROPERTY INTERFACE_COMPILE_OPTIONS $<$<NOT:$<CONFIG:Debug>>:$<$<COMPILE_LANGUAGE:CXX>:/MP>>)
|
|
endif()
|
|
endif()
|
|
|
|
# ----------------------- Optimize binary size --------------------------
|
|
|
|
add_library(pybind11::opt_size IMPORTED INTERFACE ${optional_global})
|
|
|
|
if(MSVC)
|
|
set(PYBIND11_OPT_SIZE /Os)
|
|
else()
|
|
set(PYBIND11_OPT_SIZE -Os)
|
|
endif()
|
|
|
|
set_property(
|
|
TARGET pybind11::opt_size
|
|
APPEND
|
|
PROPERTY INTERFACE_COMPILE_OPTIONS $<$<CONFIG:Release>:${PYBIND11_OPT_SIZE}>
|
|
$<$<CONFIG:MinSizeRel>:${PYBIND11_OPT_SIZE}>
|
|
$<$<CONFIG:RelWithDebInfo>:${PYBIND11_OPT_SIZE}>)
|
|
|
|
# ----------------------- Legacy option --------------------------
|
|
|
|
# Warn or error if old variable name used
|
|
if(PYBIND11_CPP_STANDARD)
|
|
string(REGEX MATCH [[..$]] VAL "${PYBIND11_CPP_STANDARD}")
|
|
if(CMAKE_CXX_STANDARD)
|
|
if(NOT CMAKE_CXX_STANDARD STREQUAL VAL)
|
|
message(WARNING "CMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD} does not match "
|
|
"PYBIND11_CPP_STANDARD=${PYBIND11_CPP_STANDARD}, "
|
|
"please remove PYBIND11_CPP_STANDARD from your cache")
|
|
endif()
|
|
else()
|
|
set(supported_standards 11 14 17 20)
|
|
if("${VAL}" IN_LIST supported_standards)
|
|
message(WARNING "USE -DCMAKE_CXX_STANDARD=${VAL} instead of PYBIND11_CPP_STANDARD")
|
|
set(CMAKE_CXX_STANDARD
|
|
${VAL}
|
|
CACHE STRING "From PYBIND11_CPP_STANDARD")
|
|
else()
|
|
message(FATAL_ERROR "PYBIND11_CPP_STANDARD should be replaced with CMAKE_CXX_STANDARD "
|
|
"(last two chars: ${VAL} not understood as a valid CXX std)")
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
# --------------------- Python specifics -------------------------
|
|
|
|
# Check to see which Python mode we are in, new, old, or no python
|
|
if(PYBIND11_NOPYTHON)
|
|
set(_pybind11_nopython ON)
|
|
elseif(
|
|
PYBIND11_FINDPYTHON
|
|
OR Python_FOUND
|
|
OR Python2_FOUND
|
|
OR Python3_FOUND)
|
|
# New mode
|
|
include("${CMAKE_CURRENT_LIST_DIR}/pybind11NewTools.cmake")
|
|
|
|
else()
|
|
|
|
# Classic mode
|
|
include("${CMAKE_CURRENT_LIST_DIR}/pybind11Tools.cmake")
|
|
|
|
endif()
|
|
|
|
# --------------------- pybind11_find_import -------------------------------
|
|
|
|
if(NOT _pybind11_nopython)
|
|
# Check to see if modules are importable. Use REQUIRED to force an error if
|
|
# one of the modules is not found. <package_name>_FOUND will be set if the
|
|
# package was found (underscores replace dashes if present). QUIET will hide
|
|
# the found message, and VERSION will require a minimum version. A successful
|
|
# find will cache the result.
|
|
function(pybind11_find_import PYPI_NAME)
|
|
# CMake variables need underscores (PyPI doesn't care)
|
|
string(REPLACE "-" "_" NORM_PYPI_NAME "${PYPI_NAME}")
|
|
|
|
# Return if found previously
|
|
if(${NORM_PYPI_NAME}_FOUND)
|
|
return()
|
|
endif()
|
|
|
|
set(options "REQUIRED;QUIET")
|
|
set(oneValueArgs "VERSION")
|
|
cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "" ${ARGN})
|
|
|
|
if(ARG_REQUIRED)
|
|
set(status_level FATAL_ERROR)
|
|
else()
|
|
set(status_level WARNING)
|
|
endif()
|
|
|
|
execute_process(
|
|
COMMAND
|
|
${${_Python}_EXECUTABLE} -c
|
|
"from pkg_resources import get_distribution; print(get_distribution('${PYPI_NAME}').version)"
|
|
RESULT_VARIABLE RESULT_PRESENT
|
|
OUTPUT_VARIABLE PKG_VERSION
|
|
ERROR_QUIET)
|
|
|
|
string(STRIP "${PKG_VERSION}" PKG_VERSION)
|
|
|
|
# If a result is present, this failed
|
|
if(RESULT_PRESENT)
|
|
set(${NORM_PYPI_NAME}_FOUND
|
|
${NORM_PYPI_NAME}-NOTFOUND
|
|
CACHE INTERNAL "")
|
|
# Always warn or error
|
|
message(
|
|
${status_level}
|
|
"Missing: ${PYPI_NAME} ${ARG_VERSION}\nTry: ${${_Python}_EXECUTABLE} -m pip install ${PYPI_NAME}"
|
|
)
|
|
else()
|
|
if(ARG_VERSION AND PKG_VERSION VERSION_LESS ARG_VERSION)
|
|
message(
|
|
${status_level}
|
|
"Version incorrect: ${PYPI_NAME} ${PKG_VERSION} found, ${ARG_VERSION} required - try upgrading"
|
|
)
|
|
else()
|
|
set(${NORM_PYPI_NAME}_FOUND
|
|
YES
|
|
CACHE INTERNAL "")
|
|
set(${NORM_PYPI_NAME}_VERSION
|
|
${PKG_VERSION}
|
|
CACHE INTERNAL "")
|
|
endif()
|
|
if(NOT ARG_QUIET)
|
|
message(STATUS "Found ${PYPI_NAME} ${PKG_VERSION}")
|
|
endif()
|
|
endif()
|
|
if(NOT ARG_VERSION OR (NOT PKG_VERSION VERSION_LESS ARG_VERSION))
|
|
# We have successfully found a good version, cache to avoid calling again.
|
|
endif()
|
|
endfunction()
|
|
endif()
|
|
|
|
# --------------------- LTO -------------------------------
|
|
|
|
include(CheckCXXCompilerFlag)
|
|
|
|
# Checks whether the given CXX/linker flags can compile and link a cxx file.
|
|
# cxxflags and linkerflags are lists of flags to use. The result variable is a
|
|
# unique variable name for each set of flags: the compilation result will be
|
|
# cached base on the result variable. If the flags work, sets them in
|
|
# cxxflags_out/linkerflags_out internal cache variables (in addition to
|
|
# ${result}).
|
|
function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerflags cxxflags_out
|
|
linkerflags_out)
|
|
set(CMAKE_REQUIRED_LIBRARIES ${linkerflags})
|
|
check_cxx_compiler_flag("${cxxflags}" ${result})
|
|
if(${result})
|
|
set(${cxxflags_out}
|
|
"${cxxflags}"
|
|
PARENT_SCOPE)
|
|
set(${linkerflags_out}
|
|
"${linkerflags}"
|
|
PARENT_SCOPE)
|
|
endif()
|
|
endfunction()
|
|
|
|
function(_pybind11_generate_lto target prefer_thin_lto)
|
|
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
|
|
set(cxx_append "")
|
|
set(linker_append "")
|
|
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT APPLE)
|
|
# Clang Gold plugin does not support -Os; append -O3 to MinSizeRel builds to override it
|
|
set(linker_append ";$<$<CONFIG:MinSizeRel>:-O3>")
|
|
elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
|
|
set(cxx_append ";-fno-fat-lto-objects")
|
|
endif()
|
|
|
|
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND prefer_thin_lto)
|
|
_pybind11_return_if_cxx_and_linker_flags_work(
|
|
HAS_FLTO_THIN "-flto=thin${cxx_append}" "-flto=thin${linker_append}"
|
|
PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
|
endif()
|
|
|
|
if(NOT HAS_FLTO_THIN)
|
|
_pybind11_return_if_cxx_and_linker_flags_work(
|
|
HAS_FLTO "-flto${cxx_append}" "-flto${linker_append}" PYBIND11_LTO_CXX_FLAGS
|
|
PYBIND11_LTO_LINKER_FLAGS)
|
|
endif()
|
|
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
|
|
# Intel equivalent to LTO is called IPO
|
|
_pybind11_return_if_cxx_and_linker_flags_work(HAS_INTEL_IPO "-ipo" "-ipo"
|
|
PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
|
elseif(MSVC)
|
|
# cmake only interprets libraries as linker flags when they start with a - (otherwise it
|
|
# converts /LTCG to \LTCG as if it was a Windows path). Luckily MSVC supports passing flags
|
|
# with - instead of /, even if it is a bit non-standard:
|
|
_pybind11_return_if_cxx_and_linker_flags_work(HAS_MSVC_GL_LTCG "/GL" "-LTCG"
|
|
PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
|
endif()
|
|
|
|
# Enable LTO flags if found, except for Debug builds
|
|
if(PYBIND11_LTO_CXX_FLAGS)
|
|
set(not_debug "$<NOT:$<CONFIG:Debug>>")
|
|
set(cxx_lang "$<COMPILE_LANGUAGE:CXX>")
|
|
if(MSVC AND CMAKE_VERSION VERSION_LESS 3.11)
|
|
set(genex "${not_debug}")
|
|
else()
|
|
set(genex "$<AND:${not_debug},${cxx_lang}>")
|
|
endif()
|
|
set_property(
|
|
TARGET ${target}
|
|
APPEND
|
|
PROPERTY INTERFACE_COMPILE_OPTIONS "$<${genex}:${PYBIND11_LTO_CXX_FLAGS}>")
|
|
if(CMAKE_PROJECT_NAME STREQUAL "pybind11")
|
|
message(STATUS "${target} enabled")
|
|
endif()
|
|
else()
|
|
if(CMAKE_PROJECT_NAME STREQUAL "pybind11")
|
|
message(STATUS "${target} disabled (not supported by the compiler and/or linker)")
|
|
endif()
|
|
endif()
|
|
|
|
if(PYBIND11_LTO_LINKER_FLAGS)
|
|
if(CMAKE_VERSION VERSION_LESS 3.11)
|
|
set_property(
|
|
TARGET ${target}
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_LIBRARIES "$<${not_debug}:${PYBIND11_LTO_LINKER_FLAGS}>")
|
|
else()
|
|
set_property(
|
|
TARGET ${target}
|
|
APPEND
|
|
PROPERTY INTERFACE_LINK_OPTIONS "$<${not_debug}:${PYBIND11_LTO_LINKER_FLAGS}>")
|
|
endif()
|
|
endif()
|
|
endfunction()
|
|
|
|
add_library(pybind11::lto IMPORTED INTERFACE ${optional_global})
|
|
_pybind11_generate_lto(pybind11::lto FALSE)
|
|
|
|
add_library(pybind11::thin_lto IMPORTED INTERFACE ${optional_global})
|
|
_pybind11_generate_lto(pybind11::thin_lto TRUE)
|
|
|
|
# ---------------------- pybind11_strip -----------------------------
|
|
|
|
function(pybind11_strip target_name)
|
|
# Strip unnecessary sections of the binary on Linux/macOS
|
|
if(CMAKE_STRIP)
|
|
if(APPLE)
|
|
set(x_opt -x)
|
|
endif()
|
|
|
|
add_custom_command(
|
|
TARGET ${target_name}
|
|
POST_BUILD
|
|
COMMAND ${CMAKE_STRIP} ${x_opt} $<TARGET_FILE:${target_name}>)
|
|
endif()
|
|
endfunction()
|