At CPack running time the `CMAKE_PROJECT_HOMEPAGE_URL` variable
is not set.
Internal CPack modules (e.g. CPackDEB, CPackRPM, CPackFreeBSD)
should use `CPACK_PACKAGE_HOMEPAGE_URL` instead, which is available
after inclusion of `CPack.cmake` into `CMakeLists.txt`.
Closes: #19607
The DEB generator was written to parse output from GNU readelf.
However, LLVM's readelf has a slightly different output format,
without parentheses around the word "SONAME". Update the regex to
account for this difference.
Fixes: #19362
The only format supported from the ones available within cpack is
gnutar, which supports large numbers encoded in base-256, and long
filenames and linknames. PAX is not and has never been a supported
format by dpkg.
Fixes: #18620
These modules are not meant to be included by user code, they are
only an internal implementation detail for CPack. Having them live
in the main Modules directory with documentation was misleading, so
they have been moved into Modules/Internal/CPack, and their
documentation has been stripped following its move into the new
"CPack Generators" section. No-op modules which contained only
documentation have been removed entirely.
The only module that hasn't been moved is CPackIFW, because it
contains user-facing macros which would be lost if it were moved.
So, the CPackIFW module has been updated with a note explaining what
needs to (eventually) happen.
