http://www.perlmonks.org?node_id=984043


in reply to h2xs problem handling nested include file(s)

First, run h2ph. It'll convert C header files to Perl header files. For eample, convert acl.h: 
cd /usr/include
h2ph sys/acl.h

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Better yet, translate all the headers in one go: 
h2ph *.h */*.h

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Then run h2xs again.

In Section Seekers of Perl Wisdom