BSD/OS support fix

["OBATA Akio" <obache%netbsd.org@localhost>]

Hi,

I heard that it will be failed to bootstrap pkgsrc on BSD/OS.
Does anyone reproduce it?

1. missing "type" command in /bin/sh

In devel/bmake/files/boot-strap:

# make sure test below uses the same diff that configure did
TOOL_DIFF=`type diff | sed 's,^[^/][^/]*,,;q'`
export MAKESYSPATH TOOL_DIFF

If `type' command is missing, TOOL_DIFF will be set as empty.
It is referred from devel/bmake/files/unit-tests/Makefile.in,
and set as plain "diff" if not set.

Probably, stop to export TOOL_DIFF or skip unit-test if it is empty,
this issue will be resolved.

2. missing pread(2) and pwrite(2)

pread(2) and pwrite(2) is used in pkgtools/libnbcompat/files/db/*/*.c,
but configure just check that those are broken on HP-UX,
and internal pread.c/pwrite.c will be used if BROKEN_{PREAD,PWRITE}.

Probably, configure do AC_CHECK_FUNCS(pread pwrite) additionally
and treat same as BROKEN if those are not found,
this issue will be resolved.

--
OBATA Akio / obache%NetBSD.org@localhost