#7942: aarch64 support in ghc --------------------------------------------+------------------------------ Reporter: jcapik | Owner: Type: feature request | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Linux | Architecture: arm Type of failure: GHC doesn't work at all | Difficulty: Unknown Test Case: | Blocked By: 7623, 8664 Blocking: | Related Tickets: --------------------------------------------+------------------------------ Comment (by cjwatson): I've been working with Karel Gardas (kgardas) to get this going, and I've now completed an unregisterised GHC bootstrap on Ubuntu arm64. I started by cross-building GHC 7.8 using variations on Karel's patch set, and then bodged together a GHC 7.6 build (since that's what we're shipping on other architectures) bootstrapping off that. This all now appears to be working fine and I should be able to get binaries into our archive in the next few days. I'm attaching a patch (made against the ghc-7.8 branch); most of it is Karel's from https://ghcarm.wordpress.com/2014/01/18/unregisterised-ghc- head-build-for-arm64-platform/, I've just tweaked it a bit given that I had the advantage of access to real hardware. Some of this may be unnecessary for an unregisterised build, but it doesn't hurt. It would be great if somebody could review and apply it, since it's a lot easier to get started on more advanced things like LLVM or NCG support if you don't have to do the time-consuming bootstrap yourself. Please note that you also need to update the embedded copy of libffi in `libffi-tarballs/` to at least version 3.0.12. Karel's initial patch caused `GHC_CONVERT_CPU` to return `arm64`. I changed this to `aarch64`, since the return value of `GHC_CONVERT_CPU` is used to construct the `--host` option for configure scripts and thus it needs to be valid as the first part of a GNU config triplet. I left the Haskell-level architecture name as `ArchARM64`, since that style is more common as a user-facing name for the architecture: for example, the Linux kernel returns `arm64` in its `uname` output. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7942#comment:24 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler