> > 	i386 was a.out until 3.3.  starting 3.4 it is ELF.
> So it's complicated. I don't suppose there's some equivalent to
> OBJECT_FMT defined in "/usr/share/mk" on OpenBSD? That would make
> things easy. Otherwise, it looks like there needs to be a detailed
> clause in <bsd.prefs.mk> spelling out the variations based on
> OS_VERSION and MACHINE_ARCH (for ${OPSYS} == "OpenBSD").
> 
> OBJECT_FMT doesn't do much, by the way. It leads to running
> ${LDCONFIG} if the platform is a.out, and it leads to warnings from
> "pkg_add" when you try install an a.out package on an ELF platform.

	bsd.own.mk has it:

itojun


# Set toolchain to be able to know differences.
.if (${MACHINE_ARCH} == "alpha" || ${MACHINE_ARCH} == "powerpc" || \
     ${MACHINE_ARCH} == "hppa" || ${MACHINE_ARCH} == "sparc64" || \
     ${MACHINE_ARCH} == "sparc" || ${MACHINE_ARCH} == "i386")
ELF_TOOLCHAIN?= yes
.else
ELF_TOOLCHAIN?= no
.endif