Source: llvm-toolchain-21 Severity: normal Tags: upstream ftbfs patch X-Debbugs-Cc: [email protected], [email protected], [email protected] User: [email protected] Usertags: powerpcspe ppc64el
Hi! I've been trying to backport llvm-toolchain-21 for Trixie for the past few weeks, because it is a requirement for backporting newer rustc versions. Unfortunately the build fails with floating point related errors. Those errors go away if I set -DPPC_LINUX_DEFAULT_IEEELONGDOUBLE=ON , but that is the wrong thing to do on Trixie which generally lacks IEEE long double.. I've tried various things, and ended up bisecting upstream LLVM which points at 8437b7f5584765ad4f7885500647657714930fbb. That commit allegedly got fixed[0], but the fix seems incomplete (since it is included in 21.1.8 and that is still broken). I've now filed an issue[1] and PR[2] upstream after verifying that upstream main is also affected. I'd appreciate input upstream from ppc experts, in particular whether my proposed changes (which do fix the package build when backporting to Trixie!) seem reasonable. Thanks, Fabian 0: https://github.com/llvm/llvm-project/issues/136596 1: https://github.com/llvm/llvm-project/issues/184994 2: https://github.com/llvm/llvm-project/issues/184995
