[CMake] How to pass arguments to 'cmake -P' scripts?

[Matthew Woehlke]

I'm trying to write an X cursor generator using cmake. Because I can 
create multiple sizes of cursors from a single config, I need to 
generate config files as part of the build process. Currently, I'm using 
a script that looks like this:

awk \
"{
     printf \"%i %i %i \", (\$1*$3)/90, (\$2*$3)/90, (\$3*$3)/90 ;
     if (NF > 4) printf \"%s %i\n\", \$4, \$5 ; else printf \"%s\n\", \$4
}" < $1 > $2

I'd like to remove the awk dependency by using a cmake script instead, 
but I couldn't figure out how to tell the script what parameters it 
should run with.

Suggestions?

-- 
Matthew
"It's impossible! But... do-able."
   -- Robert MacDougal (Sean Connery, Entrapment)