Workaround for cmake bug #0013449

[libftdi] / python / CMakeLists.txt

diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 5a61bc1..fdba559 100644 (file)
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -1,7 +1,17 @@
 option ( PYTHON_BINDINGS "Build python bindings via swig" ON )
+option ( LINK_PYTHON_LIBRARY "Link against python libraries" ON )
 
 if ( PYTHON_BINDINGS )
-  find_package ( SWIG )
+  # workaround for cmake bug #0013449
+  if ( NOT DEFINED CMAKE_FIND_ROOT_PATH )
+    find_package ( SWIG )
+  else ()
+    find_program ( SWIG_EXECUTABLE NAMES swig2.0 swig )
+    if ( SWIG_EXECUTABLE )
+      set ( SWIG_USE_FILE ${CMAKE_ROOT}/Modules/UseSWIG.cmake )
+      set ( SWIG_FOUND TRUE )
+    endif ()
+  endif ()
   find_package ( PythonLibs )
   find_package ( PythonInterp )
 endif ()
@@ -15,20 +25,25 @@ if ( SWIG_FOUND AND PYTHONLIBS_FOUND AND PYTHONINTERP_FOUND )
   swig_add_module ( ftdi1 python ftdi1.i )
   swig_link_libraries ( ftdi1 ftdi1 )
 
-  # do not link python modules on debian
-  # http://www.debian.org/doc/packaging-manuals/python-policy/ch-module_packages.html
-  if ( NOT UNIX OR ( UNIX AND NOT EXISTS "/etc/debian_version" ) )
+  if ( LINK_PYTHON_LIBRARY )
     swig_link_libraries ( ftdi1 ${PYTHON_LIBRARIES} )
   endif ()
 
-  execute_process ( COMMAND ${PYTHON_EXECUTABLE} -c "import sys; print( '%d.%d' % ( sys.version_info[0], sys.version_info[1] ) )"
-                    OUTPUT_VARIABLE PYTHON_VERSION
+  set_target_properties ( ${SWIG_MODULE_ftdi1_REAL_NAME} PROPERTIES NO_SONAME ON )
+
+  execute_process ( COMMAND ${PYTHON_EXECUTABLE} -c "from distutils import sysconfig; print( sysconfig.get_python_lib( plat_specific=True, prefix='${CMAKE_INSTALL_PREFIX}' ) )"
+                    OUTPUT_VARIABLE _ABS_PYTHON_MODULE_PATH
                     OUTPUT_STRIP_TRAILING_WHITESPACE )
 
-  set ( SITEPACKAGE lib${LIB_SUFFIX}/python${PYTHON_VERSION}/site-packages )
+  get_filename_component ( _ABS_PYTHON_MODULE_PATH ${_ABS_PYTHON_MODULE_PATH} ABSOLUTE )
+  file ( RELATIVE_PATH _REL_PYTHON_MODULE_PATH ${CMAKE_INSTALL_PREFIX} ${_ABS_PYTHON_MODULE_PATH} )
 
-  INSTALL ( FILES ${CMAKE_CURRENT_BINARY_DIR}/_ftdi1.so DESTINATION ${SITEPACKAGE} )
-  INSTALL ( FILES ${CMAKE_CURRENT_BINARY_DIR}/ftdi1.py DESTINATION ${SITEPACKAGE} )
+  set ( PYTHON_MODULE_PATH
+        ${_REL_PYTHON_MODULE_PATH}
+      )
+
+  INSTALL ( FILES ${CMAKE_CURRENT_BINARY_DIR}/_ftdi1.so DESTINATION ${PYTHON_MODULE_PATH} )
+  INSTALL ( FILES ${CMAKE_CURRENT_BINARY_DIR}/ftdi1.py DESTINATION ${PYTHON_MODULE_PATH} )
 
   if ( DOCUMENTATION AND DOXYGEN_FOUND )
 
@@ -53,8 +68,8 @@ if ( SWIG_FOUND AND PYTHONLIBS_FOUND AND PYTHONINTERP_FOUND )
       add_dependencies( ${SWIG_MODULE_ftdi1_REAL_NAME} doc_i )
 
   endif ()
-  
-  set ( LIBFTDI_PYTHON_MODULE_PATH ${CMAKE_INSTALL_PREFIX}/${SITEPACKAGE} )
+
+  set ( LIBFTDI_PYTHON_MODULE_PATH ${CMAKE_INSTALL_PREFIX}/${PYTHON_MODULE_PATH} )
   set ( LIBFTDI_PYTHON_MODULE_PATH ${LIBFTDI_PYTHON_MODULE_PATH} PARENT_SCOPE ) # for ftdiconfig.cmake
   message(STATUS "Building python bindings via swig. Will be installed under ${LIBFTDI_PYTHON_MODULE_PATH}")