Unhappy with cross-worlding

[rank1seeker at gmail.com]

So, I have Core 2 Duo, runing as i386.
I decided to go for amd64 (it's name, is so deceiving, that I've just 
recently, accidentaly figured out, that it can be used, with intel CPUs, 
too) :P

8.1 cross build i386 -> amd64 has failed
World completes successfully, but kernel fails:

    mkdep -f .depend -a   -nostdinc -D_KERNEL -DKLD_MODULE 
-DHAVE_KERNEL_OPTION_HEADERS -I. -I@ -I@/contrib/altq -
    I/usr/obj/amd64/usr/src/sys/GENERIC 
/usr/src/sys/modules/amr/amr_linux/../../../dev/amr/amr_linux.c
    /usr/src/sys/modules/amr/amr_linux/../../../dev/amr/amr_linux.c:43:36: 
error: machine/../linux/linux.h: No such file or directory
    /usr/src/sys/modules/amr/amr_linux/../../../dev/amr/amr_linux.c:44:42: 
error: machine/../linux/linux_proto.h: No such file or directory
    mkdep: compile failed
    *** Error code 1
    1 error
    *** Error code 2
    1 error
    *** Error code 2
    1 error
    *** Error code 2
    2 errors
    *** Error code 2
    1 error
    *** Error code 2
    1 error

Then, I've snapped and took an USB stick and did a binary 8.1 amd64 install 
on it.
Booted from it and kernel compiled flawlessly

PS:
Core 2 Duo - 8.1 GENERIC
    Kernel build time:
    10:30 --> i386 
    08:30 --> amd64

    Yes, without caching!


PORTS:
------
>From i386, when created USB amd64, I wanted to compile some ports(i386 -> 
amd64), for that USB stick, on my own. 
Especially because of port's patches ...

DESTIR has been set, as usual, but TARGET, was a no go!
Looking into documentation, only /usr/src, supports TARGET, used for cross 
world compilation.
Also, after throwing an eye into /usr/ports/Mk ..., I've concluded that 
ports, simply can't be cross world compiled, as they don't support it.

This 2 problems should be fixed.



Domagoj