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Doesn't matter.
I often do the following:
setenv TARGET arm # this may be iguana for you
setenv TARGET_ARCH arm
setenv MAKEOBJDIRPREFIX /home/imp/obj
cd p4/imp_arm
make buildworld
make buildenv # from here on out is in a subshell
cd ../arm/src/sys/arm/conf
config KB920X
cd ../compile/KB920X
make depend && make
You'll notice that I built in a tree that had all the arm patches
applied, and got a 'buildenv' there, but then build the kernel out of
a different tree. This is a -current p4 tree for both imp_arm and
arm, but I do this on a RELENG_6 system. I've done it in the recent
past on a 5.3 system too.
TARGET is MACHINE and TARGET_ARCH is MACHINE_ARCH. MACHINE is the
kernel architecture, while MACHINE_ARCH is the CPU architecture
(TARGET_CPU is the specific CPU that we're optimizing for). Chances
are excellent we'll have TARGET_ARCH armel and armeb shortly. Right
now we have a hack ARM_BIG_ENDIAN used to control big vs little
endian, but since MACHINE_ARCH gets encoded into packages, I think we
need to move it there so binary packages do the right thing. But
that's a WIP in my tree right now...
Thanks a lot! Of course, this leads to more questions on my part.
Firstly, is there an already outlined guide for porting to new
platforms? (Which is essentially what i'm doing for this project:
http://opensource.bleepsoft.com/index.php/Main/L4BSD )
Or is this something I'll get to stumble over through trial and error
with 'make buildworld; ? I'm finding all sorts of extra places where
the FreeBSD build system is expecting platform specific files for
example:
===> sys/boot/iguana (cleandir)
cd: can't cd to /usr/home/tyler/perforce/projects/l4bsd/src/sys/boot/
iguana
*** Error code 2
The problem I'm having is that I just want to build the kernel
specific to the "new platform" but will I necessarily have to provide
the proper constructs for the build system to cope with the new
"platform" in src/sys/ ?
Cheers,
- -R. Tyler Ballance
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