Switch python install to use an install(DIRECTORY ...) cmake command rather than a cmake script

[chandlerc]

Summary

In addition to cleaning things up, this allows more easy access to the variables. In the old version, it tried to pass variables as -D flags to cmake, but this didn't actually work. CMake drops all of those arguments on the floor (try passing garbage through them) and just picks up the limited subset of pre-defined macros. So, for example, this fixes the build with LLVM_LIBDIR_SUFFIX=64 which is how I ended up here. =]

[tfiala]

Trying this out now.

[tfiala]

LGTM.

Tested on Ubuntu 12.04 gcc 4.8.2 with stock system python 2.7 and with a custom debug python 2.7. Both configured and built properly (with LD_LIBRARY_PATH and PATH adjusted for the custom python).

[chandlerc]

Thanks, submitted in r211028.

scripts/CMakeLists.txt

 set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/LLDBWrapPython.cpp PROPERTIES GENERATED 1)
 
 ADD_CUSTOM_TARGET(swig_wrapper ALL echo -n
     DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/LLDBWrapPython.cpp
     )
 
 # Install the LLDB python module on all operating systems (except Windows)
 if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
-  install(SCRIPT lldb_python_module.cmake -DCMAKE_INSTALL_PREFIX=\"${CMAKE_INSTALL_PREFIX}\" -DCMAKE_BUILD_DIR=\"${CMAKE_BUILD_DIR}\")
+  install(DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}
+    DESTINATION lib${LLVM_LIBDIR_SUFFIX})
 endif()
 
 # build Python modules
 add_subdirectory(Python/modules)

scripts/lldb_python_module.cmake

-# This CMake script installs the LLDB python module from the build directory
-# to the install directory.
-
-# FIXME: if a non-standard version of python is requested, the cmake macro
-# below will need Python_ADDITIONAL_VERSIONS set in order to find it.
-include(FindPythonInterp)
-
-SET(PYTHON_DIRECTORY python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR})
-
-SET(lldb_module_src ${CMAKE_CURRENT_BINARY_DIR}/lib/${PYTHON_DIRECTORY})
-SET(lldb_module_dest "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib")
-
-MESSAGE(STATUS "Installing LLDB python module from: ${lldb_module_src} to ${lldb_module_dest}")
-FILE(COPY "${lldb_module_src}" DESTINATION "${lldb_module_dest}")