1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
# ~~~
# =============================================================================
# Find libraries corresponding to Python interpreter
# =============================================================================
# Using this module from Pybind11, see: github.com/pybind/pybind11/pull/207
# * Find python libraries This module finds the libraries corresponding to the Python interpreter
# FindPythonInterp provides. This code sets the following variables:
#
# PYTHONLIBS_FOUND - have the Python libs been found PYTHON_PREFIX - path to
# the Python installation PYTHON_LIBRARIES - path to the python library
# PYTHON_INCLUDE_DIRS - path to where Python.h is found PYTHON_MODULE_EXTENSION - lib
# extension, e.g. '.so' or '.pyd' PYTHON_MODULE_PREFIX - lib name prefix: usually an empty
# string PYTHON_SITE_PACKAGES - path to installation site-packages PYTHON_IS_DEBUG - whether
# the Python interpreter is a debug build
#
# Thanks to talljimbo for the patch adding the 'LDVERSION' config variable usage.
# =============================================================================
# Copyright 2001-2009 Kitware, Inc. Copyright 2012 Continuum Analytics, Inc.
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted
# provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this list of conditions
# and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice, this list of
# conditions and the following disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# * Neither the names of Kitware, Inc., the Insight Software Consortium, nor the names of their
# contributors may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
# FITNESS FOR # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# =============================================================================
# Checking for the extension makes sure that `LibsNew` was found and not just `Libs`.
if(PYTHONLIBS_FOUND AND PYTHON_MODULE_EXTENSION)
return()
endif()
# Use the Python interpreter to find the libs.
if(PythonLibsNew_FIND_REQUIRED)
find_package(PythonInterp ${PythonLibsNew_FIND_VERSION} REQUIRED)
else()
find_package(PythonInterp ${PythonLibsNew_FIND_VERSION})
endif()
if(NOT PYTHONINTERP_FOUND)
set(PYTHONLIBS_FOUND FALSE)
return()
endif()
# According to http://stackoverflow.com/questions/646518/python-how-to-detect-debug-interpreter
# testing whether sys has the gettotalrefcount function is a reliable, cross-platform way to detect
# a CPython debug interpreter.
#
# The library suffix is from the config var LDVERSION sometimes, otherwise VERSION. VERSION will
# typically be like "2.7" on unix, and "27" on windows.
execute_process(
COMMAND
"${PYTHON_EXECUTABLE}" "-c" "import sysconfig;import sys;import struct;
print('.'.join(str(v) for v in sys.version_info));
print(sys.prefix);
print(sysconfig.get_path('include'));
print(sysconfig.get_path('platlib'));
print(sysconfig.get_config_var('EXT_SUFFIX'));
print(hasattr(sys, 'gettotalrefcount')+0);
print(struct.calcsize('@P'));
print(sysconfig.get_config_var('LDVERSION') or sysconfig.get_config_var('VERSION'));
print(sysconfig.get_config_var('LIBDIR') or '');
print(sysconfig.get_config_var('MULTIARCH') or '');
"
RESULT_VARIABLE _PYTHON_SUCCESS
OUTPUT_VARIABLE _PYTHON_VALUES
ERROR_VARIABLE _PYTHON_ERROR_VALUE)
if(NOT _PYTHON_SUCCESS MATCHES 0)
if(PythonLibsNew_FIND_REQUIRED)
message(FATAL_ERROR "Python config failure:\n${_PYTHON_VALUES}\n${_PYTHON_ERROR_VALUE}")
endif()
set(PYTHONLIBS_FOUND FALSE)
return()
endif()
# Convert the process output into a list
if(WIN32)
string(REGEX REPLACE "\\\\" "/" _PYTHON_VALUES ${_PYTHON_VALUES})
endif()
string(REGEX REPLACE ";" "\\\\;" _PYTHON_VALUES ${_PYTHON_VALUES})
string(REGEX REPLACE "\n" ";" _PYTHON_VALUES ${_PYTHON_VALUES})
list(GET _PYTHON_VALUES 0 _PYTHON_VERSION_LIST)
list(GET _PYTHON_VALUES 1 PYTHON_PREFIX)
if(NOT DEFINED PYTHON_INCLUDE_DIR)
list(GET _PYTHON_VALUES 2 PYTHON_INCLUDE_DIR)
endif()
list(GET _PYTHON_VALUES 3 PYTHON_SITE_PACKAGES)
list(GET _PYTHON_VALUES 4 PYTHON_MODULE_EXTENSION)
list(GET _PYTHON_VALUES 5 PYTHON_IS_DEBUG)
list(GET _PYTHON_VALUES 6 PYTHON_SIZEOF_VOID_P)
list(GET _PYTHON_VALUES 7 PYTHON_LIBRARY_SUFFIX)
list(GET _PYTHON_VALUES 8 PYTHON_LIBDIR)
list(GET _PYTHON_VALUES 9 PYTHON_MULTIARCH)
# Make sure the Python has the same pointer-size as the chosen compiler Skip if CMAKE_SIZEOF_VOID_P
# is not defined
if(CMAKE_SIZEOF_VOID_P AND (NOT "${PYTHON_SIZEOF_VOID_P}" STREQUAL "${CMAKE_SIZEOF_VOID_P}"))
if(PythonLibsNew_FIND_REQUIRED)
math(EXPR _PYTHON_BITS "${PYTHON_SIZEOF_VOID_P} * 8")
math(EXPR _CMAKE_BITS "${CMAKE_SIZEOF_VOID_P} * 8")
message(FATAL_ERROR "Python config failure: Python is ${_PYTHON_BITS}-bit, "
"chosen compiler is ${_CMAKE_BITS}-bit")
endif()
set(PYTHONLIBS_FOUND FALSE)
return()
endif()
# The built-in FindPython didn't always give the version numbers
string(REGEX REPLACE "\\." ";" _PYTHON_VERSION_LIST ${_PYTHON_VERSION_LIST})
list(GET _PYTHON_VERSION_LIST 0 PYTHON_VERSION_MAJOR)
list(GET _PYTHON_VERSION_LIST 1 PYTHON_VERSION_MINOR)
list(GET _PYTHON_VERSION_LIST 2 PYTHON_VERSION_PATCH)
# Make sure all directory separators are '/'
string(REGEX REPLACE "\\\\" "/" PYTHON_PREFIX ${PYTHON_PREFIX})
string(REGEX REPLACE "\\\\" "/" PYTHON_INCLUDE_DIR ${PYTHON_INCLUDE_DIR})
string(REGEX REPLACE "\\\\" "/" PYTHON_SITE_PACKAGES ${PYTHON_SITE_PACKAGES})
if(CMAKE_HOST_WIN32)
set(PYTHON_LIBRARY "${PYTHON_PREFIX}/libs/Python${PYTHON_LIBRARY_SUFFIX}.lib")
# when run in a venv, PYTHON_PREFIX points to it. But the libraries remain in the original python
# installation. They may be found relative to PYTHON_INCLUDE_DIR.
if(NOT EXISTS "${PYTHON_LIBRARY}")
get_filename_component(_PYTHON_ROOT ${PYTHON_INCLUDE_DIR} DIRECTORY)
set(PYTHON_LIBRARY "${_PYTHON_ROOT}/libs/Python${PYTHON_LIBRARY_SUFFIX}.lib")
endif()
# raise an error if the python libs are still not found.
if(NOT EXISTS "${PYTHON_LIBRARY}")
message(FATAL_ERROR "Python libraries not found")
endif()
else()
if(PYTHON_MULTIARCH)
set(_PYTHON_LIBS_SEARCH "${PYTHON_LIBDIR}/${PYTHON_MULTIARCH}" "${PYTHON_LIBDIR}")
else()
set(_PYTHON_LIBS_SEARCH "${PYTHON_LIBDIR}")
endif()
# message(STATUS "Searching for Python libs in ${_PYTHON_LIBS_SEARCH}") Probably this needs to be
# more involved. It would be nice if the config information the python interpreter itself gave us
# were more complete.
find_library(
PYTHON_LIBRARY
NAMES "python${PYTHON_LIBRARY_SUFFIX}"
PATHS ${_PYTHON_LIBS_SEARCH}
NO_DEFAULT_PATH)
# If all else fails, just set the name/version and let the linker figure out the path.
if(NOT PYTHON_LIBRARY)
set(PYTHON_LIBRARY python${PYTHON_LIBRARY_SUFFIX})
# Since this isn't very robust. One more try with find_libpython.py
execute_process(
COMMAND "${PYTHON_EXECUTABLE}" "${CMAKE_SOURCE_DIR}/cmake/find_libpython.py"
RESULT_VARIABLE _PYTHON_SUCCESS
OUTPUT_VARIABLE _PYTHON_VALUES
ERROR_VARIABLE _PYTHON_ERROR_VALUE)
if(_PYTHON_SUCCESS MATCHES 0)
if(_PYTHON_VALUES)
set(PYTHON_LIBRARY "${_PYTHON_VALUES}")
message(STATUS "PYTHON_LIBRARY from find_libpython.py: \"${PYTHON_LIBRARY}\"")
endif()
endif()
endif()
endif()
mark_as_advanced(PYTHON_LIBRARY PYTHON_INCLUDE_DIR)
# Make sure Python includes exist
if(NOT EXISTS ${PYTHON_INCLUDE_DIR})
message(
FATAL_ERROR
"Could not find Python.h in ${PYTHON_INCLUDE_DIR}, install python-dev package (e.g. On Ubuntu : apt-get install python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}-dev)"
)
endif()
# We use PYTHON_INCLUDE_DIR, PYTHON_LIBRARY and PYTHON_DEBUG_LIBRARY for the cache entries because
# they are meant to specify the location of a single library. We now set the variables listed by the
# documentation for this module.
set(PYTHON_INCLUDE_DIRS "${PYTHON_INCLUDE_DIR}")
set(PYTHON_LIBRARIES "${PYTHON_LIBRARY}")
set(PYTHON_DEBUG_LIBRARIES "${PYTHON_DEBUG_LIBRARY}")
find_package_message(PYTHON "Found PythonLibs: ${PYTHON_LIBRARY}"
"${PYTHON_EXECUTABLE}${PYTHON_VERSION}")
set(PYTHONLIBS_FOUND TRUE)
# ~~~
|
