Date: Wed, 03 Jun 2009 18:37:40 -0400 From: Chuck Robey <chuckr@telenix.org> To: Sam Leffler <sam@freebsd.org> Cc: freebsd-arm@freebsd.org Subject: Re: ARMv7 - EABI - Cross Compiler Message-ID: <4A26FB34.7000209@telenix.org> In-Reply-To: <4A2555C8.8040405@freebsd.org> References: <77926.36276.qm@web59405.mail.ac4.yahoo.com> <4A2555C8.8040405@freebsd.org>
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Sam Leffler wrote: > Vassilis Laganakos wrote: >> Hello, >> >> 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 (2.19.51.20090527), >> 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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