From: Andre McCurdy <armccurdy@gmail.com>
To: musl@lists.openwall.com
Subject: Re: [PATCH] fix build failure on arm because of missing clz instruction
Date: Fri, 28 Jun 2019 15:55:56 -0700 [thread overview]
Message-ID: <CAJ86T=V979AvMkPum80zA8RTWwHgePei8zocrFhCg8VWKNhr6A@mail.gmail.com> (raw)
In-Reply-To: <20180824232027.GO1878@brightrain.aerifal.cx>
On Fri, Aug 24, 2018 at 4:20 PM Rich Felker <dalias@libc.org> wrote:
> 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@port70.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.
Sorry to resurrect such an old thread, but it seems this patch was
never applied?
Without it, -mthumb -march=armv5t still fails to build due to clz
getting into C code via inline assembler.
next prev parent reply other threads:[~2019-06-28 22:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-24 19:30 Szabolcs Nagy
2018-08-24 21:58 ` Andre McCurdy
2018-08-24 22:04 ` Andre McCurdy
2018-08-24 22:05 ` Szabolcs Nagy
2018-08-24 22:50 ` Andre McCurdy
2018-08-24 23:20 ` Rich Felker
2019-06-28 22:55 ` Andre McCurdy [this message]
2019-06-29 4:19 ` Rich Felker
2019-07-01 19:09 ` Andre McCurdy
2019-07-01 20:09 ` Rich Felker
2019-07-01 21:09 ` Andre McCurdy
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