Hubert Feyrer wrote:
 >  * the default should be to install 'all' subpackages, and
 >    options should be used to strip this down, to match the current
 >    behaviour. 

Yes? If you don't specify any subpackage, it will install all files.

 >  * As a result of this, @ifdef should rather be @ifndef
 >  * Maybe be prepared to use more complex expressions than just a single
 >    keyword:
 > 
 >    @ifndef noman || nodoc
 >    man/man1/foo.1
 >    @endif
 >    @ifndef noinfo || nodoc
 >    info/foo.info
 >    @endif

I thought this first. But I couldn't solve the dependency issue
then I introduced the idea of pre-defined subpackage.

Takemura