Checking if your kit is complete... Looks good Checking for getifaddrs()... Nope, will not use it. Writing Makefile for IO::Interface cp Interface.pm blib/lib/IO/Interface.pm AutoSplitting blib/lib/IO/Interface.pm (blib/lib/auto/IO/Interface) cp Interface/Simple.pm blib/lib/IO/Interface/Simple.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 Interface.xs > Interface.xsc && mv Interface.xsc Interface.c 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=\"1.03\" -DXS_VERSION=\"1.03\" -fPIC -I/home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/IA64.ARCHREV_0-thread-multi-64all/CORE Interface.c Interface.xs: In function `XS_IO__Interface_if_mtu': Interface.xs:642: error: structure has no member named `ifr_mtu' make: *** [Interface.o] Error 1