Re: Building gnuStep on panther

[Bill Northcott]

> From: Matthew Weinstein <mweinste@kent.edu>
> Subject: Building gnuStep on panther

> Still trying to build on panther. The good news, after playing a lot
> with LD_LIBRARY_PATH (and friends), foundation is built. Gui is
> anothe problem. I'm building from cvs. Here are make's final words
Stuff removed.

>   Linking library libgnustep-gui ...
> ld: for architecture ppc
> ld: warning undefined symbols:
> ___objc_exec_class
> _objc_get_class
> _objc_msg_lookup
> _objc_msg_lookup_super
> ___objc_class_name_Protocol
> _objc_free
etc.

The problem here is that you are linking the wrong Objective-C runtime 
library.  Because your programs are compiled using the -fgnu-runtime 
option, they call functions within the GNU runtime, which are all those 
missing symbols.  The Apple runtime has similar functions but the names 
are different.

Yves wrote
> Do you have a libgcc.dylib in /usr/local/lib ?

I would have thought you should be looking for the whereabouts of 
libobjc.dylib.  That should be in /usr/local/lib and  should solve your 
problem presuming that within the GNU build process '-L/usr/local/lib' 
is given as an option to ld before '-lobjc'.  ( See the man page for 
ld.)  Unless this happens the linker will find /usr/lib/libobjc.dylib, 
which is the Apple runtime.

By default the gcc source will not build libobjc on MacOS X/Darwin 
systems.

Bill Northcott