linking/runtime problems with non-system compiler

[Riccardo Mottola]

Hi,

I am compiling GNUstep on OpenBSD using a more modern GCC version than 
the system one. If other systems do not change library versions though 
this problem is more general.

I have compiled with CC=egcc , nothing more.

At when I run a program, I get:

$ plparse
plparse:/System/Library/Libraries/libgnustep-base.so.1.24: 
/usr/lib/libobjc.so.6.0 : WARNING: symbol(__objc_class_name_Protocol) 
size mismatch, relink your program
plparse:/System/Library/Libraries/libgnustep-base.so.1.24: 
/usr/lib/libobjc.so.6.0 : WARNING: symbol(__objc_class_name_Object) size 
mismatch, relink your program
plparse:/System/Library/Libraries/libgnustep-base.so.1.24: undefined 
symbol '__objc_msg_forward2'
Segmentation fault (core dumped)



I think the main problem is that gcc 4.9 should have bumped the revision 
of the libobjc library, since it is no longer compatible.
$ ldd /System/Tools/plparse
/System/Tools/plparse:
Start End Type Open Ref GrpRef Name
        000019de13a00000 000019de13e04000 exe  1    0   0 
/System/Tools/plparse
        000019e0929c4000 000019e0933bd000 rlib 0    1   0 
/System/Library/Libraries/libgnustep-base.so.1.24
        000019e0a3673000 000019e0a3a95000 rlib 0    2   0 
/usr/lib/libobjc.so.6.0
<...>

At runtime ldd resolves to /usr/lib which is the system compiler which 
is older (4.2, IIRC) while the correct libobjc.so.6.0 is in /usr/local/lib

Can this be solved/worked around? The path to libobjc should be 
embedded, perhaps -R as a linker flag or some other trick?

Riccardo