Compile Error `xgettext: warning: file `common/vcal.lx' extension `lx' is unknown`

[Peter Nixon]

Hi Guys

Can someone point out to me why I would be getting the following error when 
trying to compile gnokii
I am running SuSE 8.1 and I have installed all the requred packages that the 
suse .src.rpm file says is needed for a compile to no avail. I then checked 
out the current CVS, but the build is still failing. Below is the error.

-Peter

gmake -C po
gmake[1]: Entering directory `/home/peter/tmp/gnokii/po'
gmake gnokii.pot-update
gmake[2]: Entering directory `/home/peter/tmp/gnokii/po'
sed -e '/^#/d' remove-potcdate.sin > t-remove-potcdate.sed
mv t-remove-potcdate.sed remove-potcdate.sed
/usr/bin/xgettext --default-domain=gnokii --directory=.. \
  --add-comments=TRANSLATORS: --keyword=_ --keyword=N_ \
  --files-from=./POTFILES.in \
  --copyright-holder='1999-2002 Hugh Blemings, Pavel Janik, Pawel Kot'
/usr/bin/xgettext: warning: file `common/vcal.lx' extension `lx' is unknown; 
will try C
/usr/bin/xgettext: Non-ASCII string at gnokiid/gnokiid.c:60.
Please specify the source encoding through --from-code.
gmake[2]: *** [gnokii.pot-update] Error 1
gmake[2]: Leaving directory `/home/peter/tmp/gnokii/po'
gmake[1]: *** [gnokii.pot] Error 2
gmake[1]: Leaving directory `/home/peter/tmp/gnokii/po'
make: *** [po] Error 2