Checking if your kit is complete...
Looks good
Writing Makefile for Sys::Utmp
cp lib/Sys/Utmp/Utent.pm blib/lib/Sys/Utmp/Utent.pm
cp lib/Sys/Utmp.pm blib/lib/Sys/Utmp.pm
/export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap Utmp.xs > Utmp.xsc && mv Utmp.xsc Utmp.c
gcc -c  -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"1.6\" -DXS_VERSION=\"1.6\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE  Utmp.c
Utmp.xs: In function `XS_Sys__Utmp_getutent':
Utmp.xs:210: `UT_HOSTSIZE' undeclared (first use in this function)
Utmp.xs:210: (Each undeclared identifier is reported only once
Utmp.xs:210: for each function it appears in.)
Utmp.xs:254: too many arguments to function `strcpy'
make: *** [Utmp.o] Error 1