The 4.5 branch lacked the fix from [build] Link libgcjgc with -lrt on Solaris > 8 http://gcc.gnu.org/ml/gcc-patches/2011-01/msg02288.html
Since this issue has now been reported as PR boehm-gc/49381, I've backported the fix to the 4.5 branch after reconfiguring and successfully building gctest on i386-pc-solaris2.10. Rainer 2011-07-18 Rainer Orth <r...@cebitec.uni-bielefeld.de> PR boehm-gc/49381 Backport from mainline: 2011-01-31 Rainer Orth <r...@cebitec.uni-bielefeld.de> * configure.ac (*-*-solaris2*): Add -lrt to THREADLIBS. * configure: Regenerate. -- ----------------------------------------------------------------------------- Rainer Orth, Center for Biotechnology, Bielefeld University