Fixed python discovery using more modern CMake functions. For old CMake they are bundled and backported. For newer CMake the ones shipped with CMake are used.

Author: KOLANICH

CMakeLists.txt

@@ -7,6 +7,7 @@ OPTION (DISABLE_SHARED "Do not build a shared version of the libraries?" OFF)
 
 OPTION (ENABLE_PERL "Build the perl bindings?" OFF)
 OPTION (ENABLE_PYTHON "Build the python bindings?" OFF)
+OPTION (ENABLE_PYTHON3 "Build the python3 bindings?" OFF)
 OPTION (ENABLE_RUBY "Build the ruby bindings?" OFF)
 OPTION (ENABLE_TCL "Build the Tcl bindings?" OFF)
 
@@ -55,8 +56,13 @@ ENDIF (NOT PKGCONFIG_INSTALL_DIR)
 ####################################################################
 
 # where to look first for cmake modules, before ${CMAKE_ROOT}/Modules/ is checked
-SET (CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
-INSTALL( FILES ${CMAKE_MODULE_PATH}/FindLibSolv.cmake DESTINATION ${CMAKE_INSTALL_PREFIX}/share/cmake/Modules )
+SET (OUR_MODULES_DIR "${CMAKE_SOURCE_DIR}/cmake/modules")
+SET (CMAKE_MODULE_PATH "${OUR_MODULES_DIR}")
+IF (${CMAKE_VERSION} VERSION_LESS "3.12")
+  SET (CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_SOURCE_DIR}/cmake/FindPythonFromGit")
+ENDIF ()
+
+INSTALL( FILES "${OUR_MODULES_DIR}/FindLibSolv.cmake" DESTINATION "${CMAKE_INSTALL_PREFIX}/share/cmake/Modules" COMPONENT "libsolv-dev")
 
 # for shared libraries on windows (DLLs), we just export all symbols for now
 SET(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)

bindings/python/CMakeLists.txt

@@ -1,31 +1,10 @@
-IF (ENABLE_PYTHON3 AND NOT DEFINED PythonLibs_FIND_VERSION)
-    # if we build both for python2 and python3, make this the python2 build.
-    # see comment in the python3 CMakeLists.txt file
-    SET (PythonLibs_FIND_VERSION 2)
-    SET (PythonLibs_FIND_VERSION_MAJOR 2)
-ENDIF (ENABLE_PYTHON3 AND NOT DEFINED PythonLibs_FIND_VERSION)
+find_package (Python2 COMPONENTS Interpreter Development)
 
-FIND_PACKAGE (PythonLibs REQUIRED)
-IF(PYTHONLIBS_VERSION_STRING MATCHES "^([0-9.]+)")
-    SET(python_version "${CMAKE_MATCH_1}")
-ELSE()
-    MESSAGE(FATAL_ERROR "PythonLibs version format unknown '${PYTHONLIBS_VERSION_STRING}'")
-ENDIF()
-FIND_PACKAGE (PythonInterp ${python_version} REQUIRED)
-
-EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} -c "from sys import stdout; from distutils import sysconfig; stdout.write(sysconfig.get_python_lib(True))" OUTPUT_VARIABLE PYTHON_INSTALL_DIR)
-
-IF (NOT DEFINED PYTHON_VERSION_MAJOR)
-    SET (PYTHON_VERSION_MAJOR 2)
-ENDIF (NOT DEFINED PYTHON_VERSION_MAJOR)
-IF (${PYTHON_VERSION_MAJOR} GREATER 2)
-    SET (SWIG_PY_FLAGS -DPYTHON3=1)
-ENDIF (${PYTHON_VERSION_MAJOR} GREATER 2)
 SET (SWIG_PY_FLAGS ${SWIG_PY_FLAGS} -DSWIG_PYTHON_LEGACY_BOOL=1)
 
 MESSAGE (STATUS "Python executable: ${PYTHON_EXECUTABLE}")
-MESSAGE (STATUS "Python installation dir: ${PYTHON_INSTALL_DIR}")
-MESSAGE (STATUS "Python include path: ${PYTHON_INCLUDE_PATH}")
+MESSAGE (STATUS "Python installation dir: ${Python2_STDARCH}")
+MESSAGE (STATUS "Python include path: ${Python2_INCLUDE_DIRS}")
 
 ADD_CUSTOM_COMMAND (
     OUTPUT solv_python.c
@@ -35,12 +14,11 @@ ADD_CUSTOM_COMMAND (
 )
 
 ADD_DEFINITIONS(-Wno-unused)
-INCLUDE_DIRECTORIES (${PYTHON_INCLUDE_PATH})
+INCLUDE_DIRECTORIES (${Python2_INCLUDE_DIRS})
 
 ADD_LIBRARY (bindings_python MODULE solv_python.c)
 SET_TARGET_PROPERTIES (bindings_python PROPERTIES PREFIX "" OUTPUT_NAME "_solv")
 TARGET_LINK_LIBRARIES (bindings_python libsolvext libsolv ${SYSTEM_LIBRARIES})
 
-INSTALL (TARGETS bindings_python LIBRARY DESTINATION ${PYTHON_INSTALL_DIR})
-INSTALL (FILES ${CMAKE_CURRENT_BINARY_DIR}/solv.py DESTINATION ${PYTHON_INSTALL_DIR})
-
+INSTALL (TARGETS bindings_python LIBRARY DESTINATION ${Python2_STDARCH})
+INSTALL (FILES ${CMAKE_CURRENT_BINARY_DIR}/solv.py DESTINATION ${Python2_STDARCH})

bindings/python3/CMakeLists.txt

@@ -6,19 +6,14 @@
 # we cannot use FIND_PACKAGE PythonLibs here, as this would
 # clash with the python variables.
 #
-IF (NOT DEFINED PYTHON3_EXECUTABLE)
-SET (PYTHON3_EXECUTABLE "/usr/bin/python3")
-ENDIF (NOT DEFINED PYTHON3_EXECUTABLE)
-
-EXECUTE_PROCESS(COMMAND ${PYTHON3_EXECUTABLE} -c "from sys import stdout; from distutils import sysconfig; stdout.write(sysconfig.get_python_lib(True))" OUTPUT_VARIABLE PYTHON3_INSTALL_DIR)
-EXECUTE_PROCESS(COMMAND ${PYTHON3_EXECUTABLE} -c "from sys import stdout; from distutils import sysconfig; stdout.write(sysconfig.get_python_inc())" OUTPUT_VARIABLE PYTHON3_INCLUDE_DIR)
+find_package (Python3 COMPONENTS Interpreter Development)
 
 SET (SWIG_PY3_FLAGS -DPYTHON3=1)
 SET (SWIG_PY3_FLAGS ${SWIG_PY3_FLAGS} -DSWIG_PYTHON_LEGACY_BOOL=1)
 
-MESSAGE (STATUS "Python3 executable: ${PYTHON3_EXECUTABLE}")
-MESSAGE (STATUS "Python3 installation dir: ${PYTHON3_INSTALL_DIR}")
-MESSAGE (STATUS "Python3 include path: ${PYTHON3_INCLUDE_DIR}")
+MESSAGE (STATUS "Python3 executable: ${PYTHON_EXECUTABLE}")
+MESSAGE (STATUS "Python3 installation dir: ${Python3_STDARCH}")
+MESSAGE (STATUS "Python3 include path: ${Python3_INCLUDE_DIRS}")
 
 ADD_CUSTOM_COMMAND (
     OUTPUT solv_python.c
@@ -28,11 +23,11 @@ ADD_CUSTOM_COMMAND (
 )
 
 ADD_DEFINITIONS(-Wno-unused)
-INCLUDE_DIRECTORIES (${PYTHON3_INCLUDE_DIR})
+INCLUDE_DIRECTORIES (${Python3_INCLUDE_DIRS})
 
 ADD_LIBRARY (bindings_python3 SHARED solv_python.c)
 SET_TARGET_PROPERTIES (bindings_python3 PROPERTIES PREFIX "" OUTPUT_NAME "_solv")
 TARGET_LINK_LIBRARIES (bindings_python3 libsolvext libsolv ${SYSTEM_LIBRARIES})
 
-INSTALL (TARGETS bindings_python3 LIBRARY DESTINATION ${PYTHON3_INSTALL_DIR})
-INSTALL (FILES ${CMAKE_CURRENT_BINARY_DIR}/solv.py DESTINATION ${PYTHON3_INSTALL_DIR})
+INSTALL (TARGETS bindings_python3 LIBRARY DESTINATION ${Python3_STDARCH} COMPONENT "python3" )
+INSTALL (FILES ${CMAKE_CURRENT_BINARY_DIR}/solv.py DESTINATION ${Python3_STDARCH} COMPONENT "python3" )