16264 2026-04-23 10:00:41 +0000 reproducible issue with rust optimizations - lto or parallel-frontend-threads 2026-04-23 14:53:34 +0000 1 1 7 Build System, Metadata & Runtime OE-Core devtools / tool chain unspecified x86 Multiple NEW Medium+ normal 6.1 M2 1 sundeep.kokkonda sundeep.kokkonda ccasciato meta.mr.watcher meta.watcher randy.macleod --- --- No (bug/feature does not impact docs) oldest_to_newest 105204 0 sundeep.kokkonda 2026-04-23 10:00:41 +0000 When enabled lto or parallel-frontend-threads optimizations rust binaries are not reproducible. Build errors: https://lists.openembedded.org/g/openembedded-core/message/233071 When parallel-frontend-threads is enabled the binaries are differed in librustc_driver***.so between rust-dbg_1.94.0-r0_amd64.deb & rust_1.94.0-r0_amd64.deb The difference in librustc_driver***.so is in .gnu_debuglink section. Further analysis on debug data shows the .strtab section is differed and there found the debug symbols are generated with changed *.llvm.{hash} between the builds. For e.g., BuildA has: _RINvNtCskNcDw7Prru3_4core3ptr13drop_in_placeINtNtNtNtCsc9RSozNcmFu_3std4sync6poison5mutex10MutexGuarduEECsi7rQHRWG1Yr_12rustc_middle.llvm.12271321240562639378 BuildB has: _RINvNtCskNcDw7Prru3_4core3ptr13drop_in_placeINtNtNtNtCsc9RSozNcmFu_3std4sync6poison5mutex10MutexGuarduEECsi7rQHRWG1Yr_12rustc_middle.llvm.16648798016096118002 In above 2 lines the *.llvm.{hash} is changed. The issue is raised with rust upstream - https://github.com/rust-lang/rust/issues/154259