Re: rpmbuild command line override spec file %define

[Aaron Richton <richton jla rutgers edu>]

> the former, I need to --define 'build_ada 0' when I rpmbuild for
> --target=sparc64 because I have no sparc64 capable Ada compiler
> installed on my system.

If you want to codify "sparc64 is bad for ada", try something like:

# FIXME: somebody should make ada for sparcv9
%ifarch sparc64
%define build_ada 0
%else
%define build_ada 1
%endif

which may or may not get cumbersome depending on how many platforms 
do(n't) support ada. You can replace 0/1 with the examples from other 
replies to accept --without or what have you.