cross-compiling but keeping one target native

[Natalie Tasman]

I'm working on a build system with autotools.  I'd like to 
cross-compile, building a mingw/windows executable from linux.  So far, 
my system works well with the --host option (and appropriate cross tools 
installed, from the mingw-cross-env project.)

I have one target which is actually a utility used during *build* time. 
 Is it possible to specify one target which should *not* be built with 
the cross-compiler, but natively instead?

I've considered creating a separate config.ac/Makefile.am for this one 
executable, but am hoping to find a simpler solution.

(It was suggested that I post here over at the automake list).

Thanks,

Natalie