Trying to bootstrap on HP-UX 11.11

[Paul Ackersviller <pda%sdf.org@localhost>]

The farthest I'm getting so far is (without -I's):

libtool: compile:  gcc -DHAVE_CONFIG_H -I. -D_LARGEFILE_SOURCE
-D_LARGE_FILES -D_FILE_OFFSET_BITS=64 -DDEF_UMASK=0022 -DHAVE_NBCOMPAT_H=1
...
libarchive/archive_read_support_format_xar.c
In file included from libarchive/archive_read_support_format_xar.c:56:
libarchive/archive_hash.h:54: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'archive_md5_ctx'

From libarchive/archive_hash.h, it looks like MD5_CTX isn't being
defined for me, and it appears this should come from an md5.h;
I suspect the /usr/include/md5.h from my system is being used rather
than the intended one from pkgtools/...

Anyway, I've tried inserting the suitable -I.../pkgtools/libnbcompat/files
without success.  Suggestions anyone?