Re: Question about conditionnal compilation

[Nicola Pero]

> I am working on the next version of Encod.app that will allow to use cddb.
> 
> For this version, I would like it to be usuable for most unices .... 
> So I would like to make a conditionnal compilation ... 
> I mean I would like to put a flag in the GNUMakefile conditionnaly to the os
> for example :
> if  "linux/cdrom.h" is present then HAVE_LINUX=1
> 
> Is it possible to make something like this in the GNUMakefile ?

You likely need using autoconf for this ... have a look at what stuff like
gnustep-base (or other core libraries, maybe with simpler configuration,
such as gnustep-gui, do).