[csw-maintainers] GAR sanity check for a double variable assignment in build descriptions

[Sebastian Kayser]

Hi,

it has bitten me a couple of times before and maybe i am not the only
one ;) Would it be possible to include a sanity check in GAR that fires
a warning when a variable assignment occurs twice?

The following excerpt demonstrates what i mean:

PATCHFILES = patch-foo.diff
PATCHFILES = patch-bar.diff

yank&paste of the first line was used to produce the second and the
missing += makes the first patch file "vanish" for the build.

Sebastian