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Tue, 15 Apr 2025 15:46:09 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/214949 --------------0mxOwFtGkCW57RdYibauHF0i Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 53F4vZtO031514 On 15-04-2025 17:08, Martin Jansa wrote: > qemuarmv5 uses tune-arm926ejs which uses armv5te, I think you would > need to use armv5te-vfp to reproduce this, or use qemuarm with > tune-cortexa15 but switch from default cortexa15thf-neon to > cortexa15t-neon > > I was seeing it in multilib builds e.g. with > https://git.openembedded.org/openembedded-core-contrib/commit/?h=3Djans= a/master&id=3D40e9c4744a7f1eb2d91af9539d69555d36dfba30 > which uses DEFAULTTUNE:virtclass-multilib-lib32 =3D "armv7at-neon" > > unfortunately just treating softfp as soft ends with segfaults in rust > as shown nere: > https://git.openembedded.org/openembedded-core-contrib/commit/?h=3Djans= a/master&id=3Dc65eda95e5dd3ad0be0565477236d7902d5d625c > > Regards, > > On Tue, Apr 15, 2025 at 11:05=E2=80=AFAM Yash Shinde wrote: I checked for softfp tuning using (which gave TARGET_FPU =3D softfp): TUNE_FEATURES =3D "vfp armv5te" DEFAULTTUNE =3D "armv5te-vfp" TUNE_PKGARCH =3D "armv5te-vfp" But, it seems that softfp is not a valid value for llvm-floatabi in rust. It gives error as follows: | --- stderr | error: Error loading target specification: 'softfp' is not a valid=20 value for llvm-floatabi. Use 'soft' or 'hard'.. Run `rustc --print=20 target-list` for a list of built-in targets As you mentioned, using soft=20 instead of softfp also doesn't work either. It seems that unless=20 upstream Rust provides support for this, we won't be able to build Rust=20 with softfp on ARM targets. Regards, Yash. --------------0mxOwFtGkCW57RdYibauHF0i Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 53F4vZtO031514


On 15-04-2025 17:08, Martin Jansa wrote: 
qemuarmv5 uses tune-arm926ejs which uses armv5te, I think you would
need to use armv5te-vfp to reproduce this, or use qemuarm with
tune-cortexa15 but switch from default cortexa15thf-neon to
cortexa15t-neon

I was seeing it in multilib builds e.g. with
https://git.openembedded.org/openembedded-cor=
e-contrib/commit/?h=3Djansa/master&id=3D40e9c4744a7f1eb2d91af9539d695=
55d36dfba30
which uses DEFAULTTUNE:virtclass-multilib-lib32 =3D "armv7at-neon&qu=
ot;

unfortunately just treating softfp as soft ends with segfaults in rust
as shown nere:
https://git.openembedded.org/openembedded-cor=
e-contrib/commit/?h=3Djansa/master&id=3Dc65eda95e5dd3ad0be0565477236d=
7902d5d625c

Regards,

On Tue, Apr 15, 2025 at 11:05=E2=80=AFAM Yash Shinde <Yash.Shinde@=
windriver.com> wrote:
I checked for softfp tuning using (which gave TARGET_FPU =3D softfp):=

TUNE_FEATURES =3D "vfp armv5te"
DEFAULTTUNE =3D "armv5te-vfp"
TUNE_PKGARCH =3D "armv5te-vfp"

But, it seems that softfp is not a valid value for llvm-floatabi in rust.
It gives error as follows:
|   --- stderr                       =
                                                                         =
                                 
|   error: Error=
 loading target specification: 'softfp' is not a valid value for llvm-flo=
atabi. Use 'soft' or 'hard'.. Run `rustc --print target-list` for a list =
of built-in targets =20

As you mentioned, using soft instead of softfp also doesn't work either.
It seems that unless upstream Rust provides support for this, we won't be=
 able to build Rust with softfp on ARM targets.

Regards,
Yash.


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