*-*-solaris*)
cat >>confdefs.h <<\_ACEOF
-#define GC_SOLARIS_THREADS 1
-_ACEOF
-
-
-cat >>confdefs.h <<\_ACEOF
#define GC_SOLARIS_PTHREADS 1
_ACEOF
+ # Need to use alternate thread library, otherwise gctest hangs
+ # on Solaris 8.
+ multi_os_directory=`$CC -print-multi-os-directory`
+ THREADLIBS="-L/usr/lib/lwp/$multi_os_directory \
+ -R/usr/lib/lwp/$multi_os_directory -lpthread -lthread -lrt"
;;
*-*-irix*)