Date: Sun, 30 May 2010 17:41:53 +0200 From: Erik Cederstrand <erik@cederstrand.dk> To: freebsd-hackers@freebsd.org Cc: "=?iso-8859-1?Q?=22C._Bergstr=F6m=22?=" <cbergstrom@pathscale.com> Subject: Re: Permissive licensed toolchain Message-ID: <3A66374B-B6EE-4286-9575-BDA6261A0AFA@cederstrand.dk> In-Reply-To: <4C0272E9.8020800@pathscale.com> References: <op.vb0w1zrh43o42p@klevas> <4BDD28E2.8010201@rawbw.com> <httjse$4ee$1@dough.gmane.org> <op.vdirbroh43o42p@klevas> <45C1FA95-C9A3-41EA-9E3A-61E35C7F6AD1@cederstrand.dk> <4C0272E9.8020800@pathscale.com>
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--Apple-Mail-163-574170180 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 Den 30/05/2010 kl. 16.15 skrev C. Bergstr=F6m: > What's the real status of a fully permissive licensed toolchain? You mean ClangBSD? > 1) Benchmarks - (I mean emperical evidence on FBSD and per target with = no anecdotal comments or speculation.. I admit benchmarks can actually = be misleading since many companies optimize for them specifically) I'm working (slowly) on comparing FreeBSD and ClangBSD for various = benchmarks. > 3) Which assembler is being used? The same as FreeBSD: GNU as. There is ongoing work in the llvm-mc = project to provide an assembler for LLVM, but ELF support is low = priority for Apple. There was an experimental patch on the mailing list = a couple of weeks back. > 4) Which linker is being used? GNU ld. LLVM also provides a linker, but last time I checked it wasn't = functional on FreeBSD. It provides LTO that would be interesting to = benchmark. > What's the best way to make a plan which will get feedback if someone = wanted to try alternative approach to the above? Make it easily available, e.g. as a Subversion repo like ClangBSD, or an = install CD, and provide instructions for easy installation and test. I'm = testing ClangBSD in a VirtualBox VM which makes it easy to recover after = hosing the operating system. Erik= --Apple-Mail-163-574170180--
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