Date: Sun, 4 Mar 2012 12:56:45 -0700 From: Warner Losh <imp@bsdimp.com> To: Andrew Turner <andrew@fubar.geek.nz> Cc: "arm@freebsd.org" <arm@freebsd.org>, Tim Kientzle <tim@kientzle.com> Subject: Re: native toolchain for freestanding apps Message-ID: <7BF42BF4-547A-424D-A0F0-99075BE86C15@bsdimp.com> In-Reply-To: <20120304221219.434706ca@fubar.geek.nz> References: <23CB6C35-9450-40BA-9FA3-37C44B328CA8@freebsd.org> <CABt%2Bj0mB4w==h_SQ4YyDM24_wGOjcdZDK9T1N3DqjSkap0VkQw@mail.gmail.com> <E8A24EBE-967D-44F8-A884-3207B3C6F0FE@bsdimp.com> <8042D895-3B3D-431E-ADCC-A150BDC838ED@kientzle.com> <890D6B89-8031-496C-A5A2-A2836369F765@FreeBSD.org> <A68B207A-2754-4222-A30B-FDBD143A03D5@kientzle.com> <88338819-70CF-4BA7-92AE-95864F159FF4@FreeBSD.org> <3206B98F-E9F1-4758-9741-AF29FE7CCBFA@kientzle.com> <EE178EB5-3469-405A-9938-9ADE3B771F02@kientzle.com> <20120304221219.434706ca@fubar.geek.nz>
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On Mar 4, 2012, at 2:12 AM, Andrew Turner wrote: > On Sun, 4 Mar 2012 00:40:06 -0800 > Tim Kientzle <tim@kientzle.com> wrote: >=20 >> On Mar 3, 2012, at 7:23 PM, Tim Kientzle wrote: >>> On Mar 3, 2012, at 5:29 PM, Stanislav Sedov wrote: >>>> On Mar 3, 2012, at 11:03 AM, Tim Kientzle <tim@kientzle.com> wrote: >>>>>=20 >>>>> 2) Missing div/mod functions in ARM libgcc. >>>>>=20 >>>>=20 >>>> Hmm, maybe they are disabled because libc supplies them? >>>=20 >>> If I copy the various div/mod object files from libc.a into >>> libgcc.a, then u-boot compiles ... >>>=20 >>> Is there any compelling reason they can't be in both places? > Have you tried to build a FreeBSD binary when both lots of symbols are > provided? If it links properly then I can't think of any reason we > couldn't provide both. The compiler-rt versions are hidden so = shouldn't > be exposed. >=20 >> Here's the patch for libcompiler_rt (aka libgcc.a) that just includes >> an extra copy of the numeric routines (duplicating the ones in libc). >>=20 >> With this, I'm now able to build u-boot (and other freestanding >> programs) using the FreeBSD xdev tools on ARM. >>=20 >> Any comments? > I have done the same with the ARM EABI support as compiler-rt provides > the required __aeabi_* symbols. This will mean with it's support the > libc versions are unneeded. I'd say 'commit it unless it gets in the way of something' then :) The = patch looks good to my eye. Warner
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