[CMake] CPack option naming and deb generator

[Fredrik Hultin]

Hi

I've got a question and/or suggestion regarding CPack:
How are the generator specific settings supposed to be sent to the generators?

If I understand the CPack system correctly you're supposed (or at
least you have the option) to write CPack settings in your
CMakeLists.txt. This would be achieved by setting up your options with
SET(CPACK_option "value") followed by a INCLUDE(CPack). CMake then
checks what options are CPack-specific (starts with CPACK_) and places
them in the file
CPackConfig.cmake. But how about the generator specific options that
don't start with CPACK? DEBIAN_PACKAGE_* for example. Wouldn't it be
better to name all the options for CPack with the prefix CPACK (like
CPACK_DEBIAN_PACKAGE_ARCHITECTURE or perhaps CPACK_DEB_ARCHITECTURE)?

I did a quick modification the deb-generator so that it looked for
variables named with the CPACK_DEBIAN_PACKAGE prefix instead and my
settings were indeed transferred from CMakeLists.txt to the
CPackConfig-file.

I also did a small change to the CPackDeb.cmake file so that it
defaults to setting the architecture to the current one using dpkg
--print-architecture rather than simply always setting it to "i386"
(Since I'm on AMD64 it mislabeled all my generated .deb-packages).

If you agree you can have the patches, if you don't; please teach me
how to do it (ie. selecting DEBIAN_PACKAGE_ARCHITECTURE) the proper
way. ;)

Regards
Fredrik