Re: Slight improvement to common.make

[Nicola Pero]

Hi Markus,

sorry for being late in answering - have been busy.

I've rewritten your patch so that it doesn't fire any subshell, and it
only scan directories when compiling or linking - not each time a makefile
is read - to prevent degradation of performance on make clean etc.

I've made the patch OS X specific, then committed to CVS.

Let me know if it works for you, or if you have got any problems with it.

> >> Hello all,
> >>
> >> the linker installed on OS X complains about empty directories.
> >> Today I found this annoying and decided to exclude empty Header
> >> and Library directories from the search list. The exclusion is
> >> done at build time, so any change will be honored immediately.
> >
> > Thanks for reporting - it is an interesting problem - are you sure that
> > the OS X linker/compiler does not have an option to shut up the 
> > warnings ?
> 
> There's the "-w" option which supresses _all_ warnings. Not 
> really what I want.
> 
> > The problem with you patch is that it slows down the processing a lot.
> > It is firing a lot of subshells ... that stuff is forbidden :-)
> 
> Version #2 fires only two subshells and fits better if you want 
> to make it OS X specific: