Re: help on installing swarm

[Marcus G. Daniels]

Two issues here --  Both probably deserve mention in the FAQ.

1.  Don't use gcc-2.8.0 on Sparcs.  There's a bug that causes MessageProbes
    to not work.  If you want to use gcc-2.8.0, get Scott Christley's
    patch from ftp://alpha.gnu.org/gnu/gnustep/contrib/gcc-2.8.0-sparc.diff.

    (This issue won't come up in the next release of Swarm.)

2.  Link errors involving multiple definitions of "objc_{free,malloc}",
    etc. mean that you are using either a binary distribution built
    with gcc 2.7.2 (like in this case), or you are linking against a tclobjc
    library built with gcc 2.7.2.

gcc -g -L/export/home0/swarm/swarm-1.0.5/lib  -L/usr/openwin/lib  -o
heatbugs Heatbug.o HeatSpace.o main.o HeatbugModelSwarm.o
HeatbugObserverSwarm.o HeatbugBatchSwarm.o
/export/home0/swarm/swarm-1.0.5/lib/swarm.x -lobjc -lX11 -lm  -lsocket =
-ldl-lnsl
ld: fatal: symbol `objc_free' is multiply defined:
(file /export/home0/swarm/swarm-1.0.5/lib/swarm.x and file
/usr/local/lib/gcc-lib/sparc-sun-solaris2.5.1/2.8.0/libobjc.a(misc.o));
ld: fatal: symbol `objc_atomic_malloc' is multiply defined:
(file /export/home0/swarm/swarm-1.0.5/lib/swarm.x and file
/usr/local/lib/gcc-lib/sparc-sun-solaris2.5.1/2.8.0/libobjc.a(misc.o));
ld: fatal: symbol `objc_calloc' is multiply defined:
(file /export/home0/swarm/swarm-1.0.5/lib/swarm.x and file
/usr/local/lib/gcc-lib/sparc-sun-solaris2.5.1/2.8.0/libobjc.a(misc.o));
ld: fatal: symbol `objc_malloc' is multiply defined:
(file /export/home0/swarm/swarm-1.0.5/lib/swarm.x and file
/usr/local/lib/gcc-lib/sparc-sun-solaris2.5.1/2.8.0/libobjc.a(misc.o));
ld: fatal: symbol `objc_realloc' is multiply defined:
(file /export/home0/swarm/swarm-1.0.5/lib/swarm.x and file
/usr/local/lib/gcc-lib/sparc-sun-solaris2.5.1/2.8.0/libobjc.a(misc.o));
ld: fatal: File processing errors.  No output written to heatbugs
make: *** [heatbugs] Error 1



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