Question about "native" compiling

Hi all,

I apologize if the list finds this off topic, but I'm at a loss of who to 
ask the question and thought this would be a good place to start.  Our 
target is an MPC8347E PowerQUICC II Pro, and we're using the latest kernel 
(2.6.25).  We started this project by building on x86 and doing 
cross-compiling to the powerpc target.  As the project progressed and we 
started adding applications we found that we couldn't cross-compile 
postgress among other things.  So we switched to native compilation on the 
target.  Problem is, it's extreamly slow.  Now our idea is to get our 
hands on a PowerPC based Mac, load it up with Ubuntu and do native builds 
on that.  The question is, which Mac to get?  The concern is this: a G5 is 
64-bit but the 8347E is 32-bit.  If we do our compiles on a G5 is it 
really a 'native' compile or is it a cross-compile and we're back in the 
same boat as we were with the x86?  Should we use a G4 instead?

Thanks for any advice or pointers to other places where I can find 
information.

Bruce

Bruce_Leonard@selinc.com wrote:

If we do our compiles on a G5 is it really a 'native' compile or is
it a cross-compile and we're back in the same boat as we were with
the x86?  Should we use a G4 instead?

You can run 32-bit userspace on a G5 -- it's probably even the default in most distributions.

-Scott

linuxppc-embedded-bounces+runet=3Dinnovsys.com@ozlabs.org wrote:

Hi all,
=20
I apologize if the list finds this off topic, but I'm at a
loss of who to
ask the question and thought this would be a good place to
start.  Our
target is an MPC8347E PowerQUICC II Pro, and we're using the
latest kernel
(2.6.25).  We started this project by building on x86 and doing
cross-compiling to the powerpc target.  As the project
progressed and we
started adding applications we found that we couldn't cross-compile
postgress among other things.  So we switched to native
compilation on the
target.  Problem is, it's extreamly slow.  Now our idea is to get our
hands on a PowerPC based Mac, load it up with Ubuntu and do
native builds
on that.  The question is, which Mac to get?  The concern is
this: a G5 is
64-bit but the 8347E is 32-bit.  If we do our compiles on a G5 is it
really a 'native' compile or is it a cross-compile and we're
back in the
same boat as we were with the x86?  Should we use a G4 instead?
=20
Thanks for any advice or pointers to other places where I can find
information.=20

We use a dual G5 to do the exact same thing.
We have a compiler buildt on our target board (Freescale 8280), and on
the G5 we make sure that this compiler is being used (by chrooting into
a copy of the filesystem used on the target).=20
Then we compile all our apps .=20
Only thing we have to do speciial, is to add
--build=3Dpowerpc-unknown-linux-gnu --host=3Dpowerpc-unknown-linux-gnu =
to
the ./configure cammand line.

On May 22, 2008, at 4:30 PM, Bruce_Leonard@selinc.com wrote:

Hi all,

I apologize if the list finds this off topic, but I'm at a loss of who to
ask the question and thought this would be a good place to start.  Our
target is an MPC8347E PowerQUICC II Pro, and we're using the latest kernel
(2.6.25).  We started this project by building on x86 and doing
cross-compiling to the powerpc target.  As the project progressed and we
started adding applications we found that we couldn't cross-compile
postgress among other things.  So we switched to native compilation on the
target.  Problem is, it's extreamly slow.  Now our idea is to get our
hands on a PowerPC based Mac, load it up with Ubuntu and do native builds
on that.  The question is, which Mac to get?  The concern is this: a G5 is
64-bit but the 8347E is 32-bit.  If we do our compiles on a G5 is it
really a 'native' compile or is it a cross-compile and we're back in the
same boat as we were with the x86?  Should we use a G4 instead?

Thanks for any advice or pointers to other places where I can find
information.

Do you plan on running the same Ubuntu install (for ppc32) on the 8347e?  If not you'll need to be careful to ensure libraries, etc are the same or compatible.

- k

Thanks Kumar and everyone else who responded.  You've all been a great 
deal of help and I really appreciate it.  We're going to go with the G5. 
Thanks again.

Bruce