Note (probably harmless): No library found for -llettertree
Checking if your kit is complete...
Warning: the following files are missing in your kit:
	.#LetterTree.xs.1.7
	.#typemap.1.3
	LetterTree.bs
	LetterTree.c
	LetterTree.o
Please inform the author.
Writing Makefile for Data::LetterTree
cp lib/Data/LetterTree.pm blib/lib/Data/LetterTree.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 -typemap typemap LetterTree.xs > LetterTree.xsc && mv LetterTree.xsc LetterTree.c
Please specify prototyping behavior for LetterTree.xs (see perlxs manual)
cc -c  -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=\"0.1\" -DXS_VERSION=\"0.1\" +z -I/home/cpanrun/pa-risc1.1/build/5.6.1/lib/5.6.1/PA-RISC1.1-thread-multi/CORE  LetterTree.c
cpp: "LetterTree.xs", line 7: error 4036: Can't open include file 'lettertree.h'.
make: *** [LetterTree.o] Error 1