Checking if your kit is complete...
Looks good
Writing Makefile for Parallel::MPI
cp MPI.pm blib/lib/Parallel/MPI.pm
AutoSplitting blib/lib/Parallel/MPI.pm (blib/lib/auto/Parallel/MPI)
/home/cpanrun/pa-risc1.1/build/5.8.2/bin/perl /home/cpanrun/pa-risc1.1/build/5.8.2/lib/5.8.2/ExtUtils/xsubpp  -typemap /home/cpanrun/pa-risc1.1/build/5.8.2/lib/5.8.2/ExtUtils/typemap -typemap typemap  MPI.xs > MPI.xsc && mv MPI.xsc MPI.c
mpicc -c  -I/usr/local/mpich/include -D_POSIX_C_SOURCE=199506L -D_REENTRANT -Ae -D_HPUX_SOURCE -Wl,+vnocompatwarnings -DNO_HASH_SEED -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -fast +Onolimit +Opromote_indirect_calls +DAportable +DS2.0   -DVERSION=\"0.03\" -DXS_VERSION=\"0.03\" +Z "-I/home/cpanrun/pa-risc1.1/build/5.8.2/lib/5.8.2/PA-RISC1.1-thread-multi/CORE"  -DFLOAT_HACK MPI.c
/bin/sh: mpicc:  not found.
make: *** [MPI.o] Error 127