CMakeLists.txt revision 14299:2fbea9df56d2 
1# CMakeLists.txt -- 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)
9
10if (POLICY CMP0048)
11  # cmake warns if loaded from a min-3.0-required parent dir, so silence the warning:
12  cmake_policy(SET CMP0048 NEW)
13endif()
14
15# CMake versions < 3.4.0 do not support try_compile/pthread checks without C as active language.
16if(CMAKE_VERSION VERSION_LESS 3.4.0)
17  project(pybind11)
18else()
19  project(pybind11 CXX)
20endif()
21
22# Check if pybind11 is being used directly or via add_subdirectory
23set(PYBIND11_MASTER_PROJECT OFF)
24if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
25  set(PYBIND11_MASTER_PROJECT ON)
26endif()
27
28option(PYBIND11_INSTALL "Install pybind11 header files?" ${PYBIND11_MASTER_PROJECT})
29option(PYBIND11_TEST    "Build pybind11 test suite?"     ${PYBIND11_MASTER_PROJECT})
30
31list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/tools")
32
33include(pybind11Tools)
34
35# Cache variables so pybind11_add_module can be used in parent projects
36set(PYBIND11_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}/include" CACHE INTERNAL "")
37set(PYTHON_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS} CACHE INTERNAL "")
38set(PYTHON_LIBRARIES ${PYTHON_LIBRARIES} CACHE INTERNAL "")
39set(PYTHON_MODULE_PREFIX ${PYTHON_MODULE_PREFIX} CACHE INTERNAL "")
40set(PYTHON_MODULE_EXTENSION ${PYTHON_MODULE_EXTENSION} CACHE INTERNAL "")
41set(PYTHON_VERSION_MAJOR ${PYTHON_VERSION_MAJOR} CACHE INTERNAL "")
42set(PYTHON_VERSION_MINOR ${PYTHON_VERSION_MINOR} CACHE INTERNAL "")
43
44# NB: when adding a header don't forget to also add it to setup.py
45set(PYBIND11_HEADERS
46  include/pybind11/detail/class.h
47  include/pybind11/detail/common.h
48  include/pybind11/detail/descr.h
49  include/pybind11/detail/init.h
50  include/pybind11/detail/internals.h
51  include/pybind11/detail/typeid.h
52  include/pybind11/attr.h
53  include/pybind11/buffer_info.h
54  include/pybind11/cast.h
55  include/pybind11/chrono.h
56  include/pybind11/common.h
57  include/pybind11/complex.h
58  include/pybind11/options.h
59  include/pybind11/eigen.h
60  include/pybind11/embed.h
61  include/pybind11/eval.h
62  include/pybind11/functional.h
63  include/pybind11/numpy.h
64  include/pybind11/operators.h
65  include/pybind11/pybind11.h
66  include/pybind11/pytypes.h
67  include/pybind11/stl.h
68  include/pybind11/stl_bind.h
69)
70string(REPLACE "include/" "${CMAKE_CURRENT_SOURCE_DIR}/include/"
71       PYBIND11_HEADERS "${PYBIND11_HEADERS}")
72
73if (PYBIND11_TEST)
74  add_subdirectory(tests)
75endif()
76
77include(GNUInstallDirs)
78include(CMakePackageConfigHelpers)
79
80# extract project version from source
81file(STRINGS "${PYBIND11_INCLUDE_DIR}/pybind11/detail/common.h" pybind11_version_defines
82     REGEX "#define PYBIND11_VERSION_(MAJOR|MINOR|PATCH) ")
83foreach(ver ${pybind11_version_defines})
84  if (ver MATCHES "#define PYBIND11_VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$")
85    set(PYBIND11_VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}" CACHE INTERNAL "")
86  endif()
87endforeach()
88set(${PROJECT_NAME}_VERSION ${PYBIND11_VERSION_MAJOR}.${PYBIND11_VERSION_MINOR}.${PYBIND11_VERSION_PATCH})
89message(STATUS "pybind11 v${${PROJECT_NAME}_VERSION}")
90
91option (USE_PYTHON_INCLUDE_DIR "Install pybind11 headers in Python include directory instead of default installation prefix" OFF)
92if (USE_PYTHON_INCLUDE_DIR)
93    file(RELATIVE_PATH CMAKE_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_PREFIX} ${PYTHON_INCLUDE_DIRS})
94endif()
95
96if(NOT (CMAKE_VERSION VERSION_LESS 3.0))  # CMake >= 3.0
97  # Build an interface library target:
98  add_library(pybind11 INTERFACE)
99  add_library(pybind11::pybind11 ALIAS pybind11)  # to match exported target
100  target_include_directories(pybind11 INTERFACE $<BUILD_INTERFACE:${PYBIND11_INCLUDE_DIR}>
101                                                $<BUILD_INTERFACE:${PYTHON_INCLUDE_DIRS}>
102                                                $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
103  target_compile_options(pybind11 INTERFACE $<BUILD_INTERFACE:${PYBIND11_CPP_STANDARD}>)
104
105  add_library(module INTERFACE)
106  add_library(pybind11::module ALIAS module)
107  if(NOT MSVC)
108    target_compile_options(module INTERFACE -fvisibility=hidden)
109  endif()
110  target_link_libraries(module INTERFACE pybind11::pybind11)
111  if(WIN32 OR CYGWIN)
112    target_link_libraries(module INTERFACE $<BUILD_INTERFACE:${PYTHON_LIBRARIES}>)
113  elseif(APPLE)
114    target_link_libraries(module INTERFACE "-undefined dynamic_lookup")
115  endif()
116
117  add_library(embed INTERFACE)
118  add_library(pybind11::embed ALIAS embed)
119  target_link_libraries(embed INTERFACE pybind11::pybind11 $<BUILD_INTERFACE:${PYTHON_LIBRARIES}>)
120endif()
121
122if (PYBIND11_INSTALL)
123  install(DIRECTORY ${PYBIND11_INCLUDE_DIR}/pybind11 DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
124  # GNUInstallDirs "DATADIR" wrong here; CMake search path wants "share".
125  set(PYBIND11_CMAKECONFIG_INSTALL_DIR "share/cmake/${PROJECT_NAME}" CACHE STRING "install path for pybind11Config.cmake")
126
127  configure_package_config_file(tools/${PROJECT_NAME}Config.cmake.in
128                                "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
129                                INSTALL_DESTINATION ${PYBIND11_CMAKECONFIG_INSTALL_DIR})
130  # Remove CMAKE_SIZEOF_VOID_P from ConfigVersion.cmake since the library does
131  # not depend on architecture specific settings or libraries.
132  set(_PYBIND11_CMAKE_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})
133  unset(CMAKE_SIZEOF_VOID_P)
134  write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
135                                   VERSION ${${PROJECT_NAME}_VERSION}
136                                   COMPATIBILITY AnyNewerVersion)
137  set(CMAKE_SIZEOF_VOID_P ${_PYBIND11_CMAKE_SIZEOF_VOID_P})
138  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
139                ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
140                tools/FindPythonLibsNew.cmake
141                tools/pybind11Tools.cmake
142          DESTINATION ${PYBIND11_CMAKECONFIG_INSTALL_DIR})
143
144  if(NOT (CMAKE_VERSION VERSION_LESS 3.0))
145    if(NOT PYBIND11_EXPORT_NAME)
146      set(PYBIND11_EXPORT_NAME "${PROJECT_NAME}Targets")
147    endif()
148
149    install(TARGETS pybind11 module embed
150            EXPORT "${PYBIND11_EXPORT_NAME}")
151    if(PYBIND11_MASTER_PROJECT)
152      install(EXPORT "${PYBIND11_EXPORT_NAME}"
153              NAMESPACE "${PROJECT_NAME}::"
154              DESTINATION ${PYBIND11_CMAKECONFIG_INSTALL_DIR})
155    endif()
156  endif()
157endif()
158