Checking if your kit is complete...
Looks good
Writing Makefile for Filesys::Statfs
cp Statfs.pm blib/lib/Filesys/Statfs.pm
/home/cpanrun/ia64-lp64/build/5.6.1/bin/perl -I/home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/IA64.ARCHREV_0-thread-multi-64all -I/home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1 /home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap Statfs.xs > Statfs.xsc && mv Statfs.xsc Statfs.c
Please specify prototyping behavior for Statfs.xs (see perlxs manual)
gcc -c  -DUSE_REENTRANT_API -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE -mlp64 -L/lib/hpux64 -DUINT32_MAX_BROKEN -fPIC -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"0.01\" -DXS_VERSION=\"0.01\" -fPIC -I/home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/IA64.ARCHREV_0-thread-multi-64all/CORE  Statfs.c
Statfs.xs:8:23: sys/statfs.h: No such file or directory
Statfs.xs: In function `XS_Filesys__Statfs_statfs':
Statfs.xs:21: error: storage size of `st' isn't known
Statfs.xs:27: error: dereferencing pointer to incomplete type
Statfs.xs:28: error: dereferencing pointer to incomplete type
Statfs.xs:29: error: dereferencing pointer to incomplete type
Statfs.xs:30: error: dereferencing pointer to incomplete type
Statfs.xs:31: error: dereferencing pointer to incomplete type
Statfs.xs:32: error: dereferencing pointer to incomplete type
Statfs.xs:33: error: dereferencing pointer to incomplete type
make: *** [Statfs.o] Error 1