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https://github.com/pybind/pybind11.git
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Add LTO and strip to pybind11_add_module
This commit is contained in:
Dean Moldovan
parent
24ddf4b3f1
commit
9fb50c56d0
@ -59,14 +59,14 @@ function(pybind11_add_module target_name)
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# missing symbols, but that's perfectly fine -- they will be resolved at
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# import time.
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if(MSVC)
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target_link_libraries(${target_name} ${PYTHON_LIBRARIES})
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target_link_libraries(${target_name} PRIVATE ${PYTHON_LIBRARIES})
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elseif(APPLE)
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# Make sure OS X does not have any issues with missing symbols
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target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup")
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endif()
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# Make sure C++11/14 are enabled
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if(NOT MSVC)
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# Make sure C++11/14 are enabled
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check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
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check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
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@ -78,11 +78,58 @@ function(pybind11_add_module target_name)
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message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
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endif()
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# Enable link time optimization and set the default symbol
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# visibility to hidden (very important to obtain small binaries)
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string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)
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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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# Check for Link Time Optimization support (GCC/Clang)
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check_cxx_compiler_flag("-flto" HAS_LTO_FLAG)
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if(HAS_LTO_FLAG)
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target_compile_options(${target_name} PRIVATE -flto)
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endif()
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# Intel equivalent to LTO is called IPO
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if(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
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check_cxx_compiler_flag("-ipo" HAS_IPO_FLAG)
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if(HAS_IPO_FLAG)
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target_compile_options(${target_name} PRIVATE -ipo)
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endif()
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endif()
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# Default symbol visibility
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target_compile_options(${target_name} PRIVATE "-fvisibility=hidden")
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# Strip unnecessary sections of the binary on Linux/Mac OS
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if(CMAKE_STRIP)
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if(APPLE)
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add_custom_command(TARGET ${target_name} POST_BUILD
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COMMAND ${CMAKE_STRIP} -u -r $<TARGET_FILE:${target_name}>)
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else()
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add_custom_command(TARGET ${target_name} POST_BUILD
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COMMAND ${CMAKE_STRIP} $<TARGET_FILE:${target_name}>)
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endif()
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endif()
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endif()
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elseif(MSVC)
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# /MP enables multithreaded builds (relevant when there are many files), /bigobj is
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# needed for bigger binding projects due to the limit to 64k addressable sections
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target_compile_options(${target_name} PRIVATE /MP /bigobj)
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# Enforce link time code generation on MSVC, except in debug mode
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target_compile_options(${target_name} PRIVATE $<$<NOT:$<CONFIG:Debug>>:/GL>)
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# Fancy generator expressions don't work with linker flags, for reasons unknown
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set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE /LTCG)
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set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_MINSIZEREL /LTCG)
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set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO /LTCG)
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endif()
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endfunction()
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# Compile with compiler warnings turned on
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function(pybind11_turn_on_warnings target_name)
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if(MSVC)
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target_compile_options(${target_name} PRIVATE /W4)
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else()
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target_compile_options(${target_name} PRIVATE -Wall -Wextra)
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endif()
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endfunction()
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@ -1,5 +1,3 @@
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include(CheckCXXCompilerFlag)
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# Set a default build configuration if none is specified. 'MinSizeRel' produces the smallest binaries
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if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
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message(STATUS "Setting build type to 'MinSizeRel' as none was specified.")
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@ -7,39 +5,6 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
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set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
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"MinSizeRel" "RelWithDebInfo")
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endif()
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string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")
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# Enable link time optimization and set the default symbol
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# visibility to hidden (very important to obtain small binaries)
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if(NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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# Check for Link Time Optimization support
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# (GCC/Clang)
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CHECK_CXX_COMPILER_FLAG("-flto" HAS_LTO_FLAG)
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if(HAS_LTO_FLAG)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto")
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endif()
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# Intel equivalent to LTO is called IPO
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if(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
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CHECK_CXX_COMPILER_FLAG("-ipo" HAS_IPO_FLAG)
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if(HAS_IPO_FLAG)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ipo")
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endif()
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endif()
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endif()
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endif()
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# Compile with compiler warnings turned on
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if(MSVC)
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if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
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string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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else()
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
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endif()
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elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
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endif()
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set(PYBIND11_EXAMPLES
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example1.cpp
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@ -74,6 +39,8 @@ endif()
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# Create the binding library
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pybind11_add_module(example example.cpp ${PYBIND11_EXAMPLES})
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pybind11_turn_on_warnings(example)
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if(EIGEN3_FOUND)
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target_include_directories(example PRIVATE ${EIGEN3_INCLUDE_DIR})
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target_compile_definitions(example PRIVATE -DPYBIND11_TEST_EIGEN)
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@ -90,40 +57,6 @@ foreach(CompilerFlag ${CompilerFlags})
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set_target_properties(example PROPERTIES ${CompilerFlag} ${PROJECT_SOURCE_DIR}/example)
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endforeach()
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if(WIN32)
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if(MSVC)
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# /MP enables multithreaded builds (relevant when there are many files), /bigobj is
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# needed for bigger binding projects due to the limit to 64k addressable sections
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set_property(TARGET example APPEND PROPERTY COMPILE_OPTIONS /MP /bigobj)
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# Enforce size-based optimization and link time code generation on MSVC
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# (~30% smaller binaries in experiments); do nothing in debug mode.
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set_property(TARGET example APPEND PROPERTY COMPILE_OPTIONS
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"$<$<CONFIG:Release>:/Os>" "$<$<CONFIG:Release>:/GL>"
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"$<$<CONFIG:MinSizeRel>:/Os>" "$<$<CONFIG:MinSizeRel>:/GL>"
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"$<$<CONFIG:RelWithDebInfo>:/Os>" "$<$<CONFIG:RelWithDebInfo>:/GL>"
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)
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set_property(TARGET example APPEND_STRING PROPERTY LINK_FLAGS_RELEASE "/LTCG ")
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set_property(TARGET example APPEND_STRING PROPERTY LINK_FLAGS_MINSIZEREL "/LTCG ")
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set_property(TARGET example APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO "/LTCG ")
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endif()
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elseif(UNIX)
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# Optimize for a small binary size
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if(NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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set_target_properties(example PROPERTIES COMPILE_FLAGS "-Os")
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endif()
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# Strip unnecessary sections of the binary on Linux/Mac OS
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if(APPLE)
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if(NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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add_custom_command(TARGET example POST_BUILD COMMAND strip -u -r $<TARGET_FILE:example>)
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endif()
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else()
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if(NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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add_custom_command(TARGET example POST_BUILD COMMAND strip $<TARGET_FILE:example>)
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endif()
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endif()
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endif()
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set(RUN_TEST ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/run_test.py)
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if(MSVC OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")
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set(RUN_TEST ${RUN_TEST} --relaxed)
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