pybind11Tools.cmake (12037:d28054ac6ec9) pybind11Tools.cmake (12391:ceeca8b41e4b)
1# tools/pybind11Tools.cmake -- Build system for the pybind11 modules
2#
3# Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
4#
5# All rights reserved. Use of this source code is governed by a
6# BSD-style license that can be found in the LICENSE file.
7
8cmake_minimum_required(VERSION 2.8.12)

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13endif()
14
15set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 3.4)
16find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
17
18include(CheckCXXCompilerFlag)
19include(CMakeParseArguments)
20
1# tools/pybind11Tools.cmake -- Build system for the pybind11 modules
2#
3# Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
4#
5# All rights reserved. Use of this source code is governed by a
6# BSD-style license that can be found in the LICENSE file.
7
8cmake_minimum_required(VERSION 2.8.12)

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13endif()
14
15set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 3.4)
16find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
17
18include(CheckCXXCompilerFlag)
19include(CMakeParseArguments)
20
21function(select_cxx_standard)
22 if(NOT MSVC AND NOT PYBIND11_CPP_STANDARD)
21if(NOT PYBIND11_CPP_STANDARD AND NOT CMAKE_CXX_STANDARD)
22 if(NOT MSVC)
23 check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
23 check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
24 check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
25
26 if (HAS_CPP14_FLAG)
27 set(PYBIND11_CPP_STANDARD -std=c++14)
24
25 if (HAS_CPP14_FLAG)
26 set(PYBIND11_CPP_STANDARD -std=c++14)
28 elseif (HAS_CPP11_FLAG)
29 set(PYBIND11_CPP_STANDARD -std=c++11)
30 else()
27 else()
31 message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
28 check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
29 if (HAS_CPP11_FLAG)
30 set(PYBIND11_CPP_STANDARD -std=c++11)
31 else()
32 message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
33 endif()
32 endif()
34 endif()
33
34 set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING
35 "C++ standard flag, e.g. -std=c++11 or -std=c++14. Defaults to latest available." FORCE)
35 elseif(MSVC)
36 set(PYBIND11_CPP_STANDARD /std:c++14)
36 endif()
37 endif()
37endfunction()
38
38
39 set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING
40 "C++ standard flag, e.g. -std=c++11, -std=c++14, /std:c++14. Defaults to C++14 mode." FORCE)
41endif()
42
39# Checks whether the given CXX/linker flags can compile and link a cxx file. cxxflags and
40# linkerflags are lists of flags to use. The result variable is a unique variable name for each set
41# of flags: the compilation result will be cached base on the result variable. If the flags work,
42# sets them in cxxflags_out/linkerflags_out internal cache variables (in addition to ${result}).
43function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerflags cxxflags_out linkerflags_out)
44 set(CMAKE_REQUIRED_LIBRARIES ${linkerflags})
45 check_cxx_compiler_flag("${cxxflags}" ${result})
46 if (${result})

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130 PRIVATE ${PYBIND11_INCLUDE_DIR} # from project CMakeLists.txt
131 PRIVATE ${pybind11_INCLUDE_DIR} # from pybind11Config
132 PRIVATE ${PYTHON_INCLUDE_DIRS})
133
134 # The prefix and extension are provided by FindPythonLibsNew.cmake
135 set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
136 set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}")
137
43# Checks whether the given CXX/linker flags can compile and link a cxx file. cxxflags and
44# linkerflags are lists of flags to use. The result variable is a unique variable name for each set
45# of flags: the compilation result will be cached base on the result variable. If the flags work,
46# sets them in cxxflags_out/linkerflags_out internal cache variables (in addition to ${result}).
47function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerflags cxxflags_out linkerflags_out)
48 set(CMAKE_REQUIRED_LIBRARIES ${linkerflags})
49 check_cxx_compiler_flag("${cxxflags}" ${result})
50 if (${result})

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134 PRIVATE ${PYBIND11_INCLUDE_DIR} # from project CMakeLists.txt
135 PRIVATE ${pybind11_INCLUDE_DIR} # from pybind11Config
136 PRIVATE ${PYTHON_INCLUDE_DIRS})
137
138 # The prefix and extension are provided by FindPythonLibsNew.cmake
139 set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
140 set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}")
141
142 # -fvisibility=hidden is required to allow multiple modules compiled against
143 # different pybind versions to work properly, and for some features (e.g.
144 # py::module_local). We force it on everything inside the `pybind11`
145 # namespace; also turning it on for a pybind module compilation here avoids
146 # potential warnings or issues from having mixed hidden/non-hidden types.
147 set_target_properties(${target_name} PROPERTIES CXX_VISIBILITY_PRESET "hidden")
148
138 if(WIN32 OR CYGWIN)
139 # Link against the Python shared library on Windows
140 target_link_libraries(${target_name} PRIVATE ${PYTHON_LIBRARIES})
141 elseif(APPLE)
142 # It's quite common to have multiple copies of the same Python version
143 # installed on one's system. E.g.: one copy from the OS and another copy
144 # that's statically linked into an application like Blender or Maya.
145 # If we link our plugin library against the OS Python here and import it

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156 target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup")
157
158 if(ARG_SHARED)
159 # Suppress CMake >= 3.0 warning for shared libraries
160 set_target_properties(${target_name} PROPERTIES MACOSX_RPATH ON)
161 endif()
162 endif()
163
149 if(WIN32 OR CYGWIN)
150 # Link against the Python shared library on Windows
151 target_link_libraries(${target_name} PRIVATE ${PYTHON_LIBRARIES})
152 elseif(APPLE)
153 # It's quite common to have multiple copies of the same Python version
154 # installed on one's system. E.g.: one copy from the OS and another copy
155 # that's statically linked into an application like Blender or Maya.
156 # If we link our plugin library against the OS Python here and import it

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167 target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup")
168
169 if(ARG_SHARED)
170 # Suppress CMake >= 3.0 warning for shared libraries
171 set_target_properties(${target_name} PROPERTIES MACOSX_RPATH ON)
172 endif()
173 endif()
174
164 select_cxx_standard()
165 if(NOT MSVC)
166 # Make sure C++11/14 are enabled
167 target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD})
168 endif()
175 # Make sure C++11/14 are enabled
176 target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD})
169
170 if(ARG_NO_EXTRAS)
171 return()
172 endif()
173
174 _pybind11_add_lto_flags(${target_name} ${ARG_THIN_LTO})
175
176 if (NOT MSVC AND NOT ${CMAKE_BUILD_TYPE} MATCHES Debug)
177
178 if(ARG_NO_EXTRAS)
179 return()
180 endif()
181
182 _pybind11_add_lto_flags(${target_name} ${ARG_THIN_LTO})
183
184 if (NOT MSVC AND NOT ${CMAKE_BUILD_TYPE} MATCHES Debug)
177 # Set the default symbol visibility to hidden (very important to obtain small binaries)
178 target_compile_options(${target_name} PRIVATE "-fvisibility=hidden")
179
180 # Strip unnecessary sections of the binary on Linux/Mac OS
181 if(CMAKE_STRIP)
182 if(APPLE)
183 add_custom_command(TARGET ${target_name} POST_BUILD
184 COMMAND ${CMAKE_STRIP} -x $<TARGET_FILE:${target_name}>)
185 else()
186 add_custom_command(TARGET ${target_name} POST_BUILD
187 COMMAND ${CMAKE_STRIP} $<TARGET_FILE:${target_name}>)
188 endif()
189 endif()
190 endif()
191
192 if(MSVC)
193 # /MP enables multithreaded builds (relevant when there are many files), /bigobj is
194 # needed for bigger binding projects due to the limit to 64k addressable sections
195 target_compile_options(${target_name} PRIVATE /MP /bigobj)
196 endif()
197endfunction()
185 # Strip unnecessary sections of the binary on Linux/Mac OS
186 if(CMAKE_STRIP)
187 if(APPLE)
188 add_custom_command(TARGET ${target_name} POST_BUILD
189 COMMAND ${CMAKE_STRIP} -x $<TARGET_FILE:${target_name}>)
190 else()
191 add_custom_command(TARGET ${target_name} POST_BUILD
192 COMMAND ${CMAKE_STRIP} $<TARGET_FILE:${target_name}>)
193 endif()
194 endif()
195 endif()
196
197 if(MSVC)
198 # /MP enables multithreaded builds (relevant when there are many files), /bigobj is
199 # needed for bigger binding projects due to the limit to 64k addressable sections
200 target_compile_options(${target_name} PRIVATE /MP /bigobj)
201 endif()
202endfunction()