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Message-ID: <CAOUaTh9r0+xeauzkmd1mCCCCnZhXra+mPOJWh6s1Wre4rOzqPg@mail.gmail.com>
Date: Wed, 16 Feb 2022 12:59:13 +0100
From: SIMONE MIONE <205212@...denti.unimore.it>
To: noloader@...il.com
Cc: musl@...ts.openwall.com
Subject: Re: musl how to use hard float with aarch64-none-elf-gcc
Thank you all for your reply.
I meant when I add musl's lib*.a into my makefile, the compiler complains
about "undefined reference to __addtf3" (and others). Isn't that
soft-float? Or emulation float?
My supervisor told me "we already have float implementation so we don't
need those functions". So I was wondering if I need to disable it in some
way.
Il giorno mer 16 feb 2022 alle ore 12:32 Jeffrey Walton <noloader@...il.com>
ha scritto:
> On Wed, Feb 16, 2022 at 6:29 AM Szabolcs Nagy <nsz@...t70.net> wrote:
> >
> > * Jeffrey Walton <noloader@...il.com> [2022-02-16 05:24:48 -0500]:
> > > On Wed, Feb 16, 2022 at 4:51 AM SIMONE MIONE <
> 205212@...denti.unimore.it> wrote:
> > > >
> > > > I am trying to integrate musl in a baremetal environment. I already
> have float support but I can't manage to disable soft-float by musl.
> > > >
> > > > I configure with:
> > > > ./configure --target=aarch64-none-elf --enable-debug --disable-shared
> > > > And simple compile with:
> > > > make
> > > >
> > > > Does anyone know how to use hardfloat instead of soft float? Is
> there any option or flag? Thank you
> > >
> > > The GCC options for hard-floats are -mfpu=neon -mfloat-abi=hard. In
> > > later versions of GCC, you can also use -mfpu=auto (sometimes).
> >
> > that's for 32bit arm
> >
> > there is no soft float abi for aarch64, so i'm not sure what's going on.
>
> Oh, you're right My bad. I did not notice it was Aarch64.
>
> Jeff
>
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