Add CPack configuration for debian packages

Allows to automatically generate .deb based on current generated `install`
target. Some of package settings are taken from exiting CMake variables, some
from host system.

CMakeCPack.cmake

@@ -0,0 +1,13 @@
+#
+# Common CPack configuration
+#
+set(CPACK_PACKAGE_NAME ${CMAKE_PROJECT_NAME})
+set(CPACK_PACKAGE_VERSION ${LDC_VERSION})
+set(CPACK_PACKAGE_CONTACT "public@dicebot.lv")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "LDC: LLVM D Compiler")
+
+#
+# Debian specifics
+#
+execute_process(COMMAND dpkg --print-architecture OUTPUT_VARIABLE CPACK_DEBIAN_PACKAGE_ARCHITECTURE) 
+set(CPACK_DEBIAN_PACKAGE_SECTION "devel")

CMakeLists.txt

@@ -525,3 +525,10 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
     endif()
     install(DIRECTORY bash_completion.d/ DESTINATION ${BASH_COMPLETION_INST_DIR})
 endif()
+
+#
+# Packaging
+#
+
+include (CMakeCPack.cmake)
+include (CPack)