Merge pull request igfuw#278 from pdziekan/correct_python_module_path

correct python module path

bindings/python/CMakeLists.txt

@@ -50,25 +50,20 @@ else()
   endif()
 endif()
 
-# ... where to find libclouph++
 target_link_libraries(cloudphxx cloudphxx_lgrngn)
 
-# installation (see http://www.cmake.org/pipermail/cmake/2013-March/054138.html)
-execute_process (
-   COMMAND ${PYTHON_EXECUTABLE} -c
-   	"import site, sys; sys.stdout.write(site.PREFIXES[-1])"
-   OUTPUT_VARIABLE PYTHON_PREFIX
-)
-file ( TO_CMAKE_PATH "${PYTHON_PREFIX}" PYTHON_PREFIX )
-execute_process (
-   COMMAND ${PYTHON_EXECUTABLE} -c
-   	"import site, sys; sys.stdout.write(site.getsitepackages()[-1])"
-   OUTPUT_VARIABLE PYTHON_SITE_DIR
-)
-file ( TO_CMAKE_PATH "${PYTHON_SITE_DIR}" PYTHON_SITE_DIR )
-string ( REGEX REPLACE "^${PYTHON_PREFIX}/" ""
-   PYTHON_SITE_DIR "${PYTHON_SITE_DIR}"
-)
+#to retain rpath to libcloudphxx_lgrngn.so linked by libcloudphxx.so after installation
+set_property(TARGET cloudphxx PROPERTY INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
+set_property(TARGET cloudphxx PROPERTY INSTALL_RPATH_USE_LINK_PATH TRUE)
+
+# where to install python modules (see http://stackoverflow.com/questions/1242904/finding-python-site-packages-directory-with-cmake)
+execute_process(
+  COMMAND "${PYTHON_EXECUTABLE}" -c "if True:
+    import sysconfig as sc
+    print(sc.get_path('platlib'))"
+  OUTPUT_VARIABLE PYTHON_SITE_DIR
+  OUTPUT_STRIP_TRAILING_WHITESPACE)
+
 
 install ( TARGETS cloudphxx
    LIBRARY

libcloudph++-config.cmake

@@ -5,10 +5,13 @@ cmake_minimum_required(VERSION 2.8.8)
 # the policies we care about:
 # - CMP0025 - make CMake distinguis between Apple and LLVM clang
 # - CMP0042 - make CMake use RPATHs on OSX
+# - CMP0060 - make CMake always keep absoult RPATHs, even if installing in implicit directory
 if(CMAKE_VERSION VERSION_GREATER 2.9)
   cmake_policy(VERSION 3.0)
 endif()
 
+set(CMAKE_MACOSX_RPATH ON) # explicit, since policy CMP0042 didn't work...
+
 ############################################################################################
 # the following variables will be set:
 set(libcloudphxx_FOUND False)
@@ -47,7 +50,8 @@ endif()
 # Boost libraries
 find_package(Boost)
 if(Boost_FOUND)
-  set(libcloudphxx_LIBRARIES "${libcloudphxx_LIBRARIES};${Boost_LIBRARIES}")
+#TODO: if boost is not linked in some program, link boost libs to libcloudphxx_lgrngn.so ?
+#  set(libcloudphxx_LIBRARIES "${libcloudphxx_LIBRARIES};${Boost_LIBRARIES}")
   set(libcloudphxx_INCLUDE_DIRS "${libcloudphxx_INCLUDE_DIRS};${Boost_INCLUDE_DIRS}")
 else()
 #TODO: check separately for optional and mandatory components