I'm attempting to generate the source and data tarballs in order to test rpm packaging, to see if there are any bugs in rpm packaging that needs to be resolved before final release of v2.5.

"make sourcearchive" works, it generates a source tarball, but "make dataarchive" does not.

I have tested using the git branches ufoai_2.4, ufoai_2.5 and master, and it only fail in ufoai_2.5 and the master branch. The ufoai_2.4 branch works.
On Debian 7 (wheezy), Mandriva 2010.2 and Mageia 2, "make dataarchive" exits with this error msg:
=======
$ make dataarchive
/bin/sh: - : invalid option
Usage: /bin/sh [GNU long option] [option] ...
/bin/sh [GNU long option] [option] script-file ...
GNU long options:
--debug
--debugger
--dump-po-strings
--dump-strings
--help
--init-file
--login
--noediting
--noprofile
--norc
--posix
--protected
--rcfile
--restricted
--verbose
--version
Shell options:
-irsD or -c command or -O shopt_option (invocation only)
-abefhkmnptuvxBCHP or -o option
/bin/sh: -r: command not found
make: *** [base/0videos.pk3] Error 1
=======

"make sourcearchive" works and the archive is created, but it have an error in the output:
=======
$ make sourcearchive
/bin/sh: - : invalid option
Usage: /bin/sh [GNU long option] [option] ...
/bin/sh [GNU long option] [option] script-file ...
GNU long options:
--debug
--debugger
--dump-po-strings
--dump-strings
--help
--init-file
--login
--noediting
--noprofile
--norc
--posix
--protected
--rcfile
--restricted
--verbose
--version
Shell options:
-irsD or -c command or -O shopt_option (invocation only)
-abefhkmnptuvxBCHP or -o option
=======