Hello! On Wed, 2023-10-11 at 15:38 +0200, John Paul Adrian Glaubitz wrote: > There is a regression in the GHC Haskell Compiler [1] that I have been > investigating for several days. While I have been able to identify the > commit that introduced the regression, I have not been able to fix > that issue since I don't have the necessary Haskell knowledge to be able > to work on GHC. > > Since the broken GHC compiler currently blocks a lot of packages on 32-bit > PowerPC and the upstream developers don't seem to be too motivated at the > moment to fix the bug, I was wondering whether people here would be willing > to throw in some money to create a bounty on that particular bug to pay > a Haskell developer to fix it.
We're starting with good news into the new year: I have been able to work around this bug and successfully built an unregisterised version of GHC 9.4.6 for powerpc. I have uploded ghc_9.4.6-1+powerpc this morning to "unreleased" and the buildds are now building all Haskell packages on powerpc that were out of date [1]. I was able to build an unregisterised compiler by setting the GCC optimization level to "O3". Building an unregisterised compiler on powerpc previously failed due to the generated C code being too large for the powerpc target [2]. The suggested CFLAGS by Segher in the comments of the GCC bug report did the trick. If we're lucky, the original regression of the 32-bit PowerPC native codegen backend might already be fixed in newer versions of the GHC compiler [3], so that we can switch back from an unregisterised build to the faster, native build of GHC. We'll see. Adrian > [1] https://buildd.debian.org/status/architecture.php?a=powerpc&suite=sid > [2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108208 > [3] https://gitlab.haskell.org/ghc/ghc/-/issues/23969 -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
