[U-Boot-Users] PPC as host

[VanBaren, Gerald (AGRE)]

> -----Original Message-----
> From: u-boot-users-admin at lists.sourceforge.net
> [mailto:u-boot-users-admin at lists.sourceforge.net] On Behalf
> Of Richard Klingler
> Sent: Monday, October 25, 2004 11:02 AM
> To: u-boot-users
> Subject: [U-Boot-Users] PPC as host
>
> Evening (o;
>
>
> Apparently no one uses Linux PPC as host?
> So no one ever had problems cross-compiling u-boot for
> another target then (o;
>
>
> In the top Makefile we have:
>
> ifndef CROSS_COMPILE
> ifeq ($(HOSTARCH),ppc)
> CROSS_COMPILE =
> else
> ....
>
> which always picks up the host ppc compiler regardless what
> ARCH you have defined for your board...
>
>
> Since I don't use PPC as target someone might come up with a
> better idea then:
>
> ifeq ($(HOSTARCH,$(ARCH))
> CROSS_COMPILE =
> else
> ...
>
>
> In my case it is YDL-3.0.1 PPC Linux running on G4.
> This doesn't happen on OSX since it is solved in the top
> config.mk file.
>
>
> best regards
> rick


The Makefile makes its best guess about cross compilers given very
limited information.  It may guess wrong, as you are seeing.

For more information, see:
  http://www.denx.de/twiki/bin/view/DULG/ELDKUsage

<blockquote>
    *  After the installation utility completes, export the
CROSS_COMPILE variable:

bash$ export CROSS_COMPILE=ppc_8xx-

      TIP The trailing '-' character in the CROSS_COMPILE variable value
is optional and has no effect on the cross tools behavior.
</blockquote>

A related hint (if you don't like the export hint) is in
  http://www.denx.de/twiki/bin/view/DULG/LinuxConfiguration

<blockquote>
If your host computer is not the same architecture as the target system,
and if you got your kernel tree from kernel.org or other "official"
sources, then you may have to supply an architecture override and a
cross compiler definition. The most reliable way to do this is to
specify them on the make command line as part of the make command. If
this is the case, use for example:

bash$ make ARCH=ppc CROSS_COMPILE=ppc_8xx-
</blockquote>

gvb

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