Under debian 7.4, trying to compile mpich-3.1 with Portland Group 13.6, or 14.2, same error results in both cases: make[3]: Entering directory `/home/user/mpich-3.1/src/pm/hydra' CC utils/alloc/alloc.lo PGC/x86-64 Linux 13.6-0 Copyright 1989-2000, The Portland Group, Inc. All Rights Reserved. Copyright 2000-2013, STMicroelectronics, Inc. All Rights Reserved. PGC-F-0249-#error -- "hydra requires VA_ARGS support" (./include/hydra.h: 79) PGC/x86-64 Linux 13.6-0: compilation aborted environment variables used: $ unset F90 $ export CC=pgcc $ export FC=pgf90 $ export CXX=pgCC $ export CPPFLAGS="-DNDEBUG -DpgiFortran" $ export CFLAGS="-O2 -V" $ export FFLAGS="-O2 -w -V" Thanks, Jim -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% James Long International Arctic Research Center University of Alaska Fairbanks jlong|at|alaska.edu (907) 474-2440 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%