On Fri, 4 Dec 2009, Rod Nussbaumer wrote:
> David Dudley wrote:
> > I have a project where I need to cross build some of the EPICS
> > extensions for another architecture.
> >
> > Specifically, I want to build the ChannelArchiver to run on a remote
> > Linux host.
> >
> > I already have the IOS compiled for the host (linux-xscale_be), and it
> > works well, with all the libraries and programs functional on that
> > architecture, but to make the machine I’m setting up an independent
> > system, I need to run the ChannelArchiver as well on that device.
> >
> > I defined ‘CROSS_COMPILER_TARGET_ARCHS’ in the extensions configure
> > directory to ‘linux-xscale_be’, and when I build, I create a xscale_be
> > bin directory, however the build system doesn’t pick up the target
> > build tools, so it’s building 2 copies of the host programs.
> >
> > What do I adjust to make the extensions build system pick up the
> > proper toolset?
> >
> > David Dudley
>
> You will need to create
> base/configure/os/CONFIG_SITE.linux-x86.linux-xscale_be
>
> In it, you can assign to '$GNU_DIR' the path to your cross tools. When
> you do this, leave off any trailing 'bin' directory name, as EPICS build
> will append this by itself. See the corresponding files for other
> architectures as a guide.
There already exists a linux-arm_eb target, which should serve: you should
just need to edit GNU_DIR and GNU_TARGET in
configure/os/CONFIG_SITE.linux-x86.linux-arm_eb
GNU_DIR, as Rod says, points to the base directory for your cross
compiler, and GNU_TARGET needs to be the compiler target tuple, or to be
precise, the prefix in front of your compiler call: eg, I compile with
arm-xscale-linux-gnueabi-gcc
and so I have
GNU_TARGET = arm-xscale-linux-gnueabi
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