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Tue, 15 Apr 2025 15:51:49 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/214951 --------------TJDLYCkWngRsopAM6HAWN0Xy Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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=jansa/master&id=40e9c4744a7f1eb2d91af9539d69555d36dfba30 > which uses DEFAULTTUNE:virtclass-multilib-lib32 = "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=jansa/master&id=c65eda95e5dd3ad0be0565477236d7902d5d625c > > Regards, > I checked for softfp tuning using (which gave TARGET_FPU = softfp): TUNE_FEATURES = "vfp armv5te" DEFAULTTUNE = "armv5te-vfp" TUNE_PKGARCH = "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-floatabi. Use 'soft' or 'hard'.. Run `rustc --print target-list` for a list of built-in targets 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. --------------TJDLYCkWngRsopAM6HAWN0Xy Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit


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=jansa/master&id=40e9c4744a7f1eb2d91af9539d69555d36dfba30
which uses DEFAULTTUNE:virtclass-multilib-lib32 = "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=jansa/master&id=c65eda95e5dd3ad0be0565477236d7902d5d625c

Regards,

I checked for softfp tuning using (which gave TARGET_FPU = softfp): TUNE_FEATURES = "vfp armv5te" DEFAULTTUNE = "armv5te-vfp" TUNE_PKGARCH = "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-floatabi. Use 'soft' or 'hard'.. Run `rustc --print target-list` for a list of built-in targets 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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boundary="------------TJDLYCkWngRsopAM6HAWN0Xy" Content-Language: en-US List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Tue, 15 Apr 2025 15:53:49 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/214951 Message-ID: <20250415155343.CqVFsjI9fEI9zmc5UGBIeByrgJhfGvpa4CgRVTtADtw@z> --------------TJDLYCkWngRsopAM6HAWN0Xy Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable On 15-04-2025 17:08, Martin Jansa wrote: >=20 > 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 >=20 > I was seeing > it in multilib builds e.g. with > https://git.openembedded.org/openembedded-core-contrib/commit/?h=3Djansa/= master&id=3D40e9c4744a7f1eb2d91af9539d69555d36dfba30 >=20 > which uses DEFAULTTUNE:virtclass-multilib-lib32 =3D "armv7at-neon" >=20 > unfortunately just treating softfp as soft ends with segfaults in rust > as > shown nere: > https://git.openembedded.org/openembedded-core-contrib/commit/?h=3Djansa/= master&id=3Dc65eda95e5dd3ad0be0565477236d7902d5d625c >=20 >=20 > Regards, >=20 >=20 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-floatabi. Use 'soft' or 'hard'.. Run `rustc --print t= arget-list` for a list of built-in targets 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 a= ble to build Rust with softfp on ARM targets. Regards, Yash. --------------TJDLYCkWngRsopAM6HAWN0Xy Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

 

On 15-04-2025 17:08, Martin Jansa wrote: 
qemuarmv5 uses tune-arm926ejs which uses armv5=
te, 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=3Djansa/master&am=
p;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=3Djansa/master&am=
p;id=3Dc65eda95e5dd3ad0be0565477236d7902d5d625c

Regards,

I checked for softfp tuning using (which gave TARGET_FPU =3D softf= p):

TUNE_FEATURES =3D "vfp armv5te"
DEFAULTTUNE =3D "armv= 5te-vfp"
TUNE_PKGARCH =3D "armv5te-vfp"

But, it seems tha= t softfp is not a valid value for llvm-floatabi in rust.
It gives err= or as follows:

| --- stderr | error: Error loading target speci= fication: 'softfp' is not a valid value for llvm-floatabi. Use 'soft' or 'h= ard'.. Run `rustc --print target-list` for a list of built-in targets

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

Regard= s,
Yash.

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