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build: use pkg-config to properly link python

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fixes incorrect (non)detection of libpython3.Ym.so due to PEP 3149 since
python's officially exported build flags know how to correctly link to
python.
This commit is contained in:
Eli Schwartz
2019-07-24 14:50:36 -04:00
committed by Sébastien Helleu
parent b8d69307ee
commit ad7d16a5b3
4 changed files with 21 additions and 84 deletions
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cmake/FindPython.cmake
+6 -72
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@@ -24,80 +24,14 @@
# code sets the following variables:
#
# PYTHON_EXECUTABLE = full path to the python binary
# PYTHON_INCLUDE_PATH = path to where python.h can be found
# PYTHON_LIBRARY = path to where libpython.so* can be found
# PYTHON_LFLAGS = python compiler options for linking
# PYTHON_INCLUDE_DIRS = path to where python.h can be found
# PYTHON_LIBRARIES = path to where libpython.so* can be found
# PYTHON_LDFLAGS = python compiler options for linking
if(PYTHON_FOUND)
# Already in cache, be silent
set(PYTHON_FIND_QUIETLY TRUE)
endif()
include(FindPkgConfig)
if(ENABLE_PYTHON2)
find_program(PYTHON_EXECUTABLE
NAMES python2.7 python2.6 python2.5 python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python3 python
PATHS /usr/bin /usr/local/bin /usr/pkg/bin
)
pkg_check_modules(PYTHON python2)
else()
find_program(PYTHON_EXECUTABLE
NAMES python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python3 python
PATHS /usr/bin /usr/local/bin /usr/pkg/bin
)
endif()
if(PYTHON_EXECUTABLE)
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import *; sys.stdout.write(get_config_var('INCLUDEPY'))"
OUTPUT_VARIABLE PYTHON_INC_DIR
)
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import *; sys.stdout.write(get_config_var('LIBPL'))"
OUTPUT_VARIABLE PYTHON_POSSIBLE_LIB_PATH
)
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import *; sys.stdout.write(get_config_var('LIBS') + ' ' + get_config_var('LINKFORSHARED'))"
OUTPUT_VARIABLE PYTHON_LFLAGS
)
find_path(PYTHON_INCLUDE_PATH
NAMES Python.h
HINTS ${PYTHON_INC_DIR}
)
if(ENABLE_PYTHON2)
find_library(PYTHON_LIBRARY
NAMES python2.7 python2.6 python2.5 python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python3 python
HINTS ${PYTHON_POSSIBLE_LIB_PATH}
)
else()
find_library(PYTHON_LIBRARY
NAMES python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python3 python
HINTS ${PYTHON_POSSIBLE_LIB_PATH}
)
endif()
if(PYTHON_LIBRARY AND PYTHON_INCLUDE_PATH)
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "import sys; sys.stdout.write(sys.version[:3])"
OUTPUT_VARIABLE PYTHON_VERSION
)
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "import sys; sys.stdout.write(str(sys.version_info < (2,5)))"
OUTPUT_VARIABLE PYTHON_OLD_VERSION
)
if(${PYTHON_OLD_VERSION} STREQUAL "True")
message("Python >= 2.5 is needed to build python plugin, version found: ${PYTHON_VERSION}")
else()
set(PYTHON_FOUND TRUE)
endif()
endif()
mark_as_advanced(
PYTHON_EXECUTABLE
PYTHON_INCLUDE_PATH
PYTHON_LIBRARY
PYTHON_LFLAGS
)
pkg_check_modules(PYTHON python3)
endif()