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Date: Wed, 05 Jan 2011 14:36:06 +0100
From: Dimitry Andric <dim@FreeBSD.org>
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Cc: svn-src-head@freebsd.org, Alexander Best <arundel@freebsd.org>,
	Gleb Kurtsou <gleb.kurtsou@gmail.com>,
	src-committers@freebsd.org, svn-src-all@freebsd.org
Subject: Re: svn commit: r216977 - in head/libexec/rtld-elf: amd64 i386
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On 2011-01-05 13:59, John Baldwin wrote:
>> Why not to add NO_HWFLOAT knob (or similar) into makefile
>> infrastructure. And set CFLAGS accordingly, depending on CC, arch, etc.
>> These flags are getting rather common in tree.
>
> It strikes me that we really want clang/gcc to have some sort of
> '-mno-hwfloat' so we don't keep having to add new flags in the future.

This is not just about floats, clang can also use SSE/AVX instructions
for e.g.  memset(), memcpy() and the like, or even for structure
assignments.

As I replied to Alexander, it's probably better to just put such "lowest
common denominator for an arch" flags into sys.mk or bsd.cpu.mk.