Re: [gentoo-embedded] cirrus ep93xx chips / maverick crunch

[Jakub Ladman]

Hi Chris
I am very pleased with the fact, that someone is doing something to support 
ep93xx in gentoo.
I would like to help you with something, at least with extensive testing, but 
if you will guide me, possibly with some coding too.
Unfortunately i have not as good knowledge of the portage/ebuild function as 
needed.
I am five years experienced user of gentoo, but not developer.
I never wrote any ebuild, i did only some changes in some existing.

Jakub Ladman

Dne Sunday 27 January 2008 20:55:01 Christopher Friedt napsal(a):
> Jakub Ladman wrote:
> > I am using ep9307, but i can't find a way to set up crossdev to build
> > cross-compiler toolchain for maverick-crunch and the eabi extensions.
> > But i failed to match the right libc and gcc versions and CFLAGS ... to
> > build softfloat uclibc toolchain too.
> > Even the toolchain created by scripts from http://arm.cirrus.com worksn't
> > good (C compiler seems to be OK, but C++ compiling fails everytime in the
> > linker phase)
>
> Interesting... I'm using the 'crunch.tar.gz' package that has several
> bitbake scripts (.bb files) from the cirrus list as well.
>
> http://martinwguy.co.uk/martin/FPU/futaris
>
> My plan is to just create my own portage overlay, and root through all
> of the patches (one by Mike Frysinger, I might add) to get eabi and
> maverick crunch working.
>
> Binutils-2.17 was quite simple to patch (there was only 1 patch file),
> but gcc seems to have _lots_ ...
>
> Aside from that, I think that ECONF_EXTRA needs to be set in order to
> get crunch support by default on the C compiler. For that, what I'm
> using is:
>
> ECONF_EXTRA="--without-x --enable-languages=c,c++ \
> --with-cpu=ep9312 --with-float-abi=softfp --with-fpu=maverick" \
> crossdev -S armv4t-maverick-linux-gnueabi
>
> (these options can be passed to the gcc configure script, see
> gcc*/INSTALL/index.html -> configure)
>
> (I assume that when you say gnueabi, then it will set --with-abi=aapcs
> or whatever that option is... all of the options are in
> gcc*/gcc/config/arm)
>
> > I was really depressed of it.
> > My last chance to have any working compiler toolchain, was connencting a
> > harddrive via usb<>sata cable, to my evaluation board and install there a
> > stage3 for softfloat arm.
>
> Sorry, are you having problems creating an i686 ->
> arm-softfloat-linux-gnu cross-compiler or cross-compiling gcc for
> softfloat? Softfloat should compile cleanly, but I've had to apply two
> patches (1 of which should definitely be upstream)
>
> 1) externalize jar and 2) @progbits patch for arm/sysv.S
>
> The externalize jar patch is only necessary for libjava / gcj ... and
> from what I've seen, it's pretty damn slow on the arm anyway, so I'll
> probably forget about it.
>
> I'll let you know if I have any success with my overlay, but sorting
> through all of the patches for gcc might take quite a bit of time.
>
> ~/Chris


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