Linking OSLib Support

[Tony van der Hoff]

On Tue, 26 Dec 2000, at 22:43:49, John Tytgat <John.Tytgat at aaug.net>
wrote on the subject "Linking OSLib Support":

>In message <9EzGpBAJvGR6EweS at mk-net.demon.co.uk>
>          Tony van der Hoff <OSLib at mk-net.demon.co.uk> wrote:
>
>> On Fri, 22 Dec 2000, at 12:57:57, Dr. Simon J. Melhuish
>> <simon at melhuish.net> wrote on the subject "Linking OSLib Support":
>> 
>> 
>> I've just come across that problem myself in the last week. It turns out
>> that __SIG_ERR (and others) is not defined in UnixLib. The OSLibSupport
>> library was built using the CLib definitions.
>> 
>> A second problem is the X module (which requires these signals) is
>> called from the Event module in OSLibsupport, so you can't get round the
>> first problem by avoiding X. It also breaks GNU C++
>> 
>> If you use CLib instead of Unixlib, the problem goes away. However, 
>> I have here an experimental OSLibSupport, which conditionally #defines
>> the signals, and removes the dependence of Event on X. I'm still testing
>> it, and it is still subject to change, but it is available for download
>> from HTTP://www.mk-net.demon.co.uk/oslib/620/beta/oslibsupport.zip
>
>The OSLibSupport binary can only be used by either CLib or either by
>UnixLib depending how it was compiled.  UnixLib and CLib and not
>binary compatible.  If you want to use UnixLib with OSLibSupport, you
>have to recompile OSLibSupport library with the UnixLib headers.
>
Not entirely correct, I'm afraid, John.

As I said above (did you read it? :-), there is a problem with signal.h
in each of the libraries being incompatible, which is why the X module
presently fails to link. I believe I can fix that. For now I have just
removed the dependency between it and the Event module. AFAIK, every
other module links correctly.

I am presently using the (621 beta) OSLibSupport binary (built with clib
headers) together with UNIXLib without any problems. As I understand it,
Simon's problem is now also resolved. There is no need to recompile,
providing X is not used.

-- 
Tony van der Hoff         |  mailto:OSLib at mk-net.demon.co.uk
Buckinghamshire, England  |  http://www.mk-net.demon.co.uk/oslib/
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