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15.20.9434.009; Tue, 23 Dec 2025 06:10:13 +0000 Content-Type: multipart/alternative; boundary="------------pTIKDb0sGe2nuSx6bh7AOzQk" Message-ID: Date: Tue, 23 Dec 2025 11:40:05 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] rust: enable default uwtable and ignore arm no_std test To: Randy MacLeod , openembedded-core@lists.openembedded.org Cc: Sundeep.Kokkonda@windriver.com, SunilKumar.Dora@windriver.com, hemanth.250302@gmail.com, nick.owens@eero.com References: <20251222093830.2658141-1-Yash.Shinde@windriver.com> <20251222093830.2658141-2-Yash.Shinde@windriver.com> Content-Language: en-US From: Yash Shinde In-Reply-To: X-ClientProxiedBy: MA5P287CA0173.INDP287.PROD.OUTLOOK.COM (2603:1096:a01:1af::9) To PH7PR11MB7593.namprd11.prod.outlook.com (2603:10b6:510:27f::9) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR11MB7593:EE_|DM3PR11MB8757:EE_ X-MS-Office365-Filtering-Correlation-Id: ec5ded0c-d1e6-49ef-e73a-08de41e9ef01 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engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-23_02,2025-12-22_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 impostorscore=0 bulkscore=0 malwarescore=0 adultscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512230050 List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Tue, 23 Dec 2025 06:10:21 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/228448 --------------pTIKDb0sGe2nuSx6bh7AOzQk Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 23-12-2025 04:10, Randy MacLeod wrote: > On 2025-12-22 4:38 a.m., Yash.Shinde@windriver.com wrote: >> From: Hemanth Kumar M D >> >> Rust 1.92.0 adds new test that require unwind table support to be >> enabled by default. Set `default-uwtable = true` in the generated >> target spec to match upstream behavior. >> >> ref:https://github.com/rust-lang/rust/commit/fe66eaa67acc47525db6f13cf97d54780d87b805 >> >> Also ignore the no_std simple-runs UI test on ARM targets. The test >> fails with panic=abort due to a known unwind table issue on 32-bit ARM >> >> https://github.com/rust-lang/rust/issues/146996 > > Okay and I'm glad to see the upstream issues linked. > > Should we make some of these tspec decisions set-able by well-informed > users? > > Maybe they can already do that using this horridly named "FEATURES" > variable. > (rename to RUST_FEATURES maybe ?) > Most of the tspec features are set explicitly here. We are analyzing on the possibility to check and set them using FEATURES to make user-configurable. Regards, Yash > > For example, this bug: > > Unable to produce a Rust static binary with TCLIBC=musl (oe-core/master) > https://bugzilla.yoctoproject.org/show_bug.cgi?id=16076 > > seems to be due to hard-coding dynamic-linking to True below just > after your: > > + tspec['default-uwtable'] = True > > > change. > > I've CCed Nick in case you guys have a quick work-around to enable > static linking. > > ../Randy > >> Signed-off-by: Hemanth Kumar M D >> Signed-off-by: Yash Shinde >> --- >> meta/classes-recipe/rust-target-config.bbclass | 1 + >> .../rust/files/rust-oe-selftest.patch | 12 ++++++++++++ >> 2 files changed, 13 insertions(+) >> >> diff --git a/meta/classes-recipe/rust-target-config.bbclass b/meta/classes-recipe/rust-target-config.bbclass >> index 33a290412e..2a06c4ae8b 100644 >> --- a/meta/classes-recipe/rust-target-config.bbclass >> +++ b/meta/classes-recipe/rust-target-config.bbclass >> @@ -418,6 +418,7 @@ def rust_gen_target(d, thing, wd, arch): >> tspec['llvm-floatabi'] = "soft" >> elif fpu == "hard": >> tspec['llvm-floatabi'] = "hard" >> + tspec['default-uwtable'] = True >> tspec['dynamic-linking'] = True >> tspec['executables'] = True >> tspec['linker-is-gnu'] = True >> diff --git a/meta/recipes-devtools/rust/files/rust-oe-selftest.patch b/meta/recipes-devtools/rust/files/rust-oe-selftest.patch >> index b39b326455..d1fba81612 100644 >> --- a/meta/recipes-devtools/rust/files/rust-oe-selftest.patch >> +++ b/meta/recipes-devtools/rust/files/rust-oe-selftest.patch >> @@ -254,3 +254,15 @@ index a3562f2fd93..d4e52ed91be 100644 >> fn linux_hwcap2_aarch64() { >> let file = >> concat!(env!("CARGO_MANIFEST_DIR"), "/src/detect/test_data/linux-hwcap2-aarch64.auxv"); >> +diff --git a/tests/ui/no_std/simple-runs.rs b/tests/ui/no_std/simple-runs.rs >> +index af44dfe..e6674e5 100644 >> +--- a/tests/ui/no_std/simple-runs.rs >> ++++ b/tests/ui/no_std/simple-runs.rs >> +@@ -2,6 +2,7 @@ >> + >> + //@ run-pass >> + //@ compile-flags: -Cpanic=abort >> ++//@ ignore-arm FIXME(#146996) >> + //@ ignore-wasm different `main` convention >> + >> + #![feature(lang_items)] > > > -- > # Randy MacLeod > # Wind River Linux -- Regards, Yash Shinde --------------pTIKDb0sGe2nuSx6bh7AOzQk Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit


On 23-12-2025 04:10, Randy MacLeod wrote:
On 2025-12-22 4:38 a.m., Yash.Shinde@windriver.com wrote:
From: Hemanth Kumar M D <hemanth.250302@gmail.com>

Rust 1.92.0 adds new test that require unwind table support to be
enabled by default. Set `default-uwtable = true` in the generated
target spec to match upstream behavior.

ref:https://github.com/rust-lang/rust/commit/fe66eaa67acc47525db6f13cf97d54780d87b805

Also ignore the no_std simple-runs UI test on ARM targets. The test
fails with panic=abort due to a known unwind table issue on 32-bit ARM

https://github.com/rust-lang/rust/issues/146996

Okay and I'm glad to see the upstream issues linked.

Should we make some of these tspec decisions set-able by well-informed users?

Maybe they can already do that using this horridly named "FEATURES" variable.
(rename to RUST_FEATURES maybe ?)

Most of the tspec features are set explicitly here.
We are analyzing on the possibility to check and set them using FEATURES to make 
user-configurable.


Regards,
Yash


For example, this bug:

   Unable to produce a Rust static binary with TCLIBC=musl (oe-core/master)
   https://bugzilla.yoctoproject.org/show_bug.cgi?id=16076

seems to be due to hard-coding dynamic-linking to True below just after your:
  

+    tspec['default-uwtable'] = True


change.

I've CCed Nick in case you guys have a quick work-around to enable static linking.

../Randy

Signed-off-by: Hemanth Kumar M D <hemanth.250302@gmail.com>
Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
---
 meta/classes-recipe/rust-target-config.bbclass       |  1 +
 .../rust/files/rust-oe-selftest.patch                | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/meta/classes-recipe/rust-target-config.bbclass b/meta/classes-recipe/rust-target-config.bbclass
index 33a290412e..2a06c4ae8b 100644
--- a/meta/classes-recipe/rust-target-config.bbclass
+++ b/meta/classes-recipe/rust-target-config.bbclass
@@ -418,6 +418,7 @@ def rust_gen_target(d, thing, wd, arch):
         tspec['llvm-floatabi'] = "soft"
     elif fpu == "hard":
         tspec['llvm-floatabi'] = "hard"
+    tspec['default-uwtable'] = True
     tspec['dynamic-linking'] = True
     tspec['executables'] = True
     tspec['linker-is-gnu'] = True
diff --git a/meta/recipes-devtools/rust/files/rust-oe-selftest.patch b/meta/recipes-devtools/rust/files/rust-oe-selftest.patch
index b39b326455..d1fba81612 100644
--- a/meta/recipes-devtools/rust/files/rust-oe-selftest.patch
+++ b/meta/recipes-devtools/rust/files/rust-oe-selftest.patch
@@ -254,3 +254,15 @@ index a3562f2fd93..d4e52ed91be 100644
      fn linux_hwcap2_aarch64() {
          let file =
              concat!(env!("CARGO_MANIFEST_DIR"), "/src/detect/test_data/linux-hwcap2-aarch64.auxv");
+diff --git a/tests/ui/no_std/simple-runs.rs b/tests/ui/no_std/simple-runs.rs
+index af44dfe..e6674e5 100644
+--- a/tests/ui/no_std/simple-runs.rs
++++ b/tests/ui/no_std/simple-runs.rs
+@@ -2,6 +2,7 @@
+ 
+ //@ run-pass
+ //@ compile-flags: -Cpanic=abort
++//@ ignore-arm FIXME(#146996)
+ //@ ignore-wasm different `main` convention
+ 
+ #![feature(lang_items)]



-- 
# Randy MacLeod
# Wind River Linux
-- 
Regards,
Yash Shinde
--------------pTIKDb0sGe2nuSx6bh7AOzQk--