Date: Sat, 5 Apr 2014 10:14:11 -0700 From: Tim Kientzle <tim@kientzle.com> To: Shawn Webb <lattera@gmail.com> Cc: Glen Barber <gjb@freebsd.org>, FreeBSD ARM <freebsd-arm@freebsd.org> Subject: Re: Building an image for Raspberry Pi Message-ID: <525F718A-53F7-4172-9D23-190D1364AD0A@kientzle.com> In-Reply-To: <20140403061443.GD71905@pwnie.vrt.sourcefire.com> References: <20140403005755.GA71905@pwnie.vrt.sourcefire.com> <20140403054106.GT14379@glenbarber.us> <20140403061443.GD71905@pwnie.vrt.sourcefire.com>
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On Apr 2, 2014, at 11:14 PM, Shawn Webb <lattera@gmail.com> wrote: > On Apr 03, 2014 01:41 AM -0400, Glen Barber wrote: >> You need to build the XDEV stuff for the build environment. >>=20 >> Something like: make -C /usr/src XDEV=3Darm XDEV_ARCH=3Darmv6 >>=20 >> should do the trick. >=20 > Yeah, I have the xdev stuff installed. It kinda seems like just using > this xdev stuff isn't sufficient. It seems u-boot might require some > gcc-centric items (though I'm unsure what they are). Unfortunately, my time has been rather cramped, though Tom Everett and Patrick Kelsey have been doing a bunch of Crochet work recently. The confusing part about U-Boot is that it requires two different = compilers to build: * Building the U-Boot loader needs an ARM cross-compiler and relies on = GCC-specific options. * U-Boot also builds some tools that run on the build host; that uses a = different native compiler and does not seem to rely on GCC-specific = features. For the host tools, setting HOSTCC=3Dcc always worked well for me. I never had any problems with clang or gcc as the native host compiler for that part of U-Boot. For the loader itself, you can try the XDEV tools (which last I checked still built GCC) or you can try the ARM EABI GCC cross-compiler from ports (which may be broken; I volunteered to maintain it and then ran out of time to work on it). One specific GCC-ism used by U-Boot (an option to reserve a specific CPU register for global data) was added to clang recently but I don't know if that's reached FreeBSD yet. That might allow clang to build the U-Boot loader, but it will require some work: the XDEV target also builds ARM binutils and cross-libraries which are essential. Best luck, Tim
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