When I compile MPICH-master with /soft/compilers/bgclang/bin/bgclang , gdb (the CNK /bgsys/drivers/ppcfloor/gnu-linux/bin/powerpc64-bgq-linux-gdb ) doesn't know about debugging symbols. is there a different debugger I should use with bgclang? ==rob -- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA