ARMv7 - EABI - Cross Compiler
chuckr at telenix.org
Wed Jun 3 22:38:17 UTC 2009
Sam Leffler wrote:
> Vassilis Laganakos wrote:
>> I recently started working on getting a later version of GCC as a
>> cross-compiler for FreeBSD.
>> The main reason is that I'm interested in having support for the "new"
>> ARM EABI that will give the benefits of ARMv5TE onwards, to all the
>> boards that use it (Mistral EVM, BeagleBoard, etc)
>> I've built gcc 4.4.1 (rev 147925) and binutils (18.104.22.16890527),
>> using the 7-STABLE headers where appropriate. I'm now trying to built
>> libc from the same branch. I'm trying to pull out libc from the
>> building tree, and
>> build it with the above toolchain so that it will be available to use
>> it with that (once done, I'll commit a port for this); at the same
>> time I'm try to drop the GCC 4.4.1 in the build tree to be able to use
>> it for building the world.
>> Please let me know whether I'm going down the wrong path or not :o)
>> Tips and advice pointers towards
>> the right direction would be more than helpful!
>> I don't know if someone else is working on something similar, but if
>> the answer is "yes" I would be quite happy to be of help. If not, any
>> kind of help would be most appreciated :o)
> Your basic approach sounds fine. I believe you will find many small
> changes to base code required by the later version of gcc (depending on
> compile options). If you work with HEAD instead of RELENG_7 then these
> changes can likely be merged and will simplify your effort in the
> future. Ideally you should be able to install the gcc port, pull
> freebsd code, and then use the xdev build mechanism to cross-build w/
> the toolchain.
Doesn't xdev build the 4.2.1 version of gcc, like what's in the tree now?
That's unacceptable to me, gcc didn't bring in support for the Cortex-A8
processor until 4.3.0. I was able to build a cross-gcc easily using a target of
"arm-linux-gnueabi", but I'm not sure if that sort of gcc will do for building
FreeBSD. I'll worry about getting that gcc into the build, but will it work for
me on a binary basis?
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