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Date: Fri, 24 Aug 2018 19:20:27 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] fix build failure on arm because of missing clz
instruction
On Fri, Aug 24, 2018 at 02:58:04PM -0700, Andre McCurdy wrote:
> On Fri, Aug 24, 2018 at 12:30 PM, Szabolcs Nagy <nsz@...t70.net> wrote:
> > another arm patch, clz usage (in fma) was broken with -mthumb -march=armv5t.
>
> That conditional was originally written under the assumption that musl
> doesn't support thumb1 (so -mthumb -march=armv5t is not a supported
> configuration).
>
> Was that assumption wrong?
musl does not support being pure-thumb1 code, because some of the asm
source files are not thumb-compatible, but I think the C code can be
compiled as thumb1. -mthumb is only passed to the assembler for asm
source files if __thumb2__ is defined.
Rich
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