Checking if your kit is complete...
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Writing Makefile for Socket::MsgHdr
cp MsgHdr.pm blib/lib/Socket/MsgHdr.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 MsgHdr.xs > MsgHdr.xsc && mv MsgHdr.xsc MsgHdr.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=\"0.01\" -DXS_VERSION=\"0.01\" +z -I/home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/PA-RISC1.1-thread-multi/CORE  MsgHdr.c
cc: "MsgHdr.xs", line 52: error 1588: "msg_control" undefined.
cc: "MsgHdr.xs", line 52: error 1531: Invalid member of struct or union.
cc: "MsgHdr.xs", line 53: error 1588: "msg_controllen" undefined.
cc: "MsgHdr.xs", line 53: error 1531: Invalid member of struct or union.
cc: "MsgHdr.xs", line 57: error 1588: "msg_flags" undefined.
cc: "MsgHdr.xs", line 57: error 1531: Invalid member of struct or union.
cc: "MsgHdr.xs", line 85: error 1530: Undefined struct or union.
cc: "MsgHdr.xs", line 86: error 1530: Undefined struct or union.
cc: "MsgHdr.xs", line 87: error 1530: Undefined struct or union.
cc: "MsgHdr.xs", line 102: error 1588: "msg_control" undefined.
cc: "MsgHdr.xs", line 102: error 1531: Invalid member of struct or union.
cc: "MsgHdr.xs", line 103: error 1588: "msg_controllen" undefined.
cc: "MsgHdr.xs", line 103: error 1531: Invalid member of struct or union.
cc: "MsgHdr.xs", line 108: warning 527: Integral value implicitly converted to pointer in assignment.
cc: "MsgHdr.xs", line 109: warning 527: Integral value implicitly converted to pointer in assignment.
cc: "MsgHdr.xs", line 110: error 1530: Undefined struct or union.
cc: "MsgHdr.xs", line 110: warning 563: Argument #2 is not the correct type.
cc: "MsgHdr.xs", line 111: error 1530: Undefined struct or union.
cc: "MsgHdr.xs", line 111: warning 563: Argument #2 is not the correct type.
cc: "MsgHdr.xs", line 112: warning 527: Integral value implicitly converted to pointer in assignment.
cc: "MsgHdr.xs", line 112: warning 563: Argument #2 is not the correct type.
cc: "MsgHdr.xs", line 112: error 1530: Undefined struct or union.
cc: "MsgHdr.xs", line 112: warning 563: Argument #3 is not the correct type.
cc: "MsgHdr.xs", line 155: error 1588: "msg_controllen" undefined.
cc: "MsgHdr.xs", line 155: error 1531: Invalid member of struct or union.
make: *** [MsgHdr.o] Error 1