Re: function.c, unlink, copy

[John Graham-Cumming]

Torsten Mohr wrote:
> In a portable Makefile i have to set that command conditionally,
> depending on the OS, which leads to the problem to determine
> the underlying OS.  Is there a bullet-proof way to determine
> it?  Environment variables could be set not properly or also
> not at all set.  Also, i can't set it for every command.

If you are on a *nix of some sort (including CYGWIN on Windows) then 
uname will be able to give you a string representing the OS.  I wrote an 
article for Dr Dobbs on cross-platform Make a while ago and you can find 
it on this web page http://www.electric-cloud.com/resources/.

Essentially if you get the output of uname via $(shell) in a variable 
then you can set things conditionally based on the OS.

John.
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