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Re: Problems compiling . soft-float

To: Ralf Baechle <>
Subject: Re: Problems compiling . soft-float
From: Dominic Sweetman <>
Date: Tue, 26 Feb 2002 10:55:17 +0000
Cc: Jay Carlson <>,, Carlo Agostini <>,
In-reply-to: <>
References: <> <> <>
User-agent: SEMI/1.13.7 (Awazu) CLIME/1.13.6 (中ノ庄) MULE XEmacs/21.1 (patch 14) (Cuyahoga Valley) (i386-redhat-linux)

> It's really a major pain.  Softfp isn't defined in the ABI which assumes
> an FPU is available.  As the result there is no provision for mixing
> softfp and fp-less code.
> Something for the binutils to-do list - ld should make mixing hard-fp
> and soft-fp binaries impossible.

Incremental changes to the ABI are pretty bad news.  Isn't it
avoidable in this case?

It seems to me that soft-float programs are either carefully
controlled test cases, or used as part of a 100% soft-float system.

In the first case the programmer had better take care, and in the
second the kernel should have been changed to kill any program with an
FP op-code.

Dominic Sweetman
Algorithmics Ltd
The Fruit Farm, Ely Road, Chittering, CAMBS CB5 9PH, ENGLAND
phone +44 1223 706200/fax +44 1223 706250/direct +44 1223 706205

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