Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for -lk5crypto
Writing Makefile for Authen::Krb5::Simple
cp lib/Authen/Krb5/Simple.pm blib/lib/Authen/Krb5/Simple.pm
/home/cpanrun/build/5.6.1/bin/perl -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi -I/home/cpanrun/build/5.6.1/lib/5.6.1 /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap Simple.xs > Simple.xsc && mv Simple.xsc Simple.c
gcc -c -I -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.32\" -DXS_VERSION=\"0.32\" -fpic -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/CORE  Simple.c
Simple.xs:20: krb5.h: No such file or directory
make: *** [Simple.o] Error 1