Checking if your kit is complete...
Looks good
Writing Makefile for Crypt::Square
cp Square.pm blib/lib/Crypt/Square.pm
/home/cpanrun/pa-risc1.1/build/5.6.1/bin/perl -I/home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/PA-RISC1.1-thread-multi -I/home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1 /home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap Square.xs > Square.xsc && mv Square.xsc Square.c
cc -c -I. -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE +DA1.1 +DS2.0a +z -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -Ae -O +Onolimit   -DVERSION=\"1.0.0\" -DXS_VERSION=\"1.0.0\" +z -I/home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/PA-RISC1.1-thread-multi/CORE  Square.c
cpp: "_square.c", line 1474: error 4062: "Either LITTLE_ENDIAN or BIG_ENDIAN must be defined"
make: *** [Square.o] Error 1