Date: Tue, 19 Mar 2013 18:08:50 -0400 From: George Neville-Neil <gnn@neville-neil.com> To: Warner Losh <imp@bsdimp.com> Cc: freebsd-arm@freebsd.org, freebsd-toolchain@freebsd.org, Andrew Turner <andrew@fubar.geek.nz> Subject: Re: RFC: Make clang the default compiler on ARM Message-ID: <471C5F38-2401-4308-871F-32D6A395D209@neville-neil.com> In-Reply-To: <773A0A0D-4208-4F5B-AA73-416512709A4A@bsdimp.com> References: <20130318220747.29d3fd29@bender> <773A0A0D-4208-4F5B-AA73-416512709A4A@bsdimp.com>
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On Mar 18, 2013, at 11:33 , Warner Losh <imp@bsdimp.com> wrote: >=20 > On Mar 18, 2013, at 3:07 AM, Andrew Turner wrote: >=20 >> I would like to make clang the default compiler on ARM using the = patch >> at [1]. This only affects little-endian ARM as there is no support = for >> big-endian ARM in clang. >>=20 >> This will help me with my work to update the FreeBSD ARM ABI as I am >> planning on moving to a hard-float ABI on armv6 as all SoCs we >> are likely to support have at least a VFPv3-D16 floating point >> coprocessor. The version of gcc we have in our tree does not support >> the hard float ABI with VFP and support was added after gcc moved to >> the GPLv3 so we are usable to make use of it. >>=20 >> The only issue I know about is an incompatibility between gcc and = clang >> with ARM EABI however this has been fixed upstream and I plan on >> bringing it into our tree before making clang the default. If anyone >> knows of any other issues please let me know now so I can look into >> them. >>=20 >> If nobody brings up any issues or has any objections to me doing this >> I will make clang the default earlier than 25 March (UTC+0). >>=20 >> Andrew >>=20 >> [1] http://people.freebsd.org/~andrew/clang/arm_clang_default.diff >=20 > This scares me, but we're at a great time in our schedule for it. >=20 I think we ought to do this, in particular since LLVM is the future of = compiler tech. Sooner we break it the sooner we can fix it :-) Best, George
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