Hi all, Since most upstream projects (mingw-w64, Wine, Mono, Microsoft SDKs, and .NET) switched to the UCRT runtime by default, I propose we also follow their choice on Fedora's side.
This should not break most OS support, since: - XP: The vcredist installer automatically deploys UCRT stub DLLs (apisetstub). - Vista ~ 8.1: API Set resolution implemented in NTDLL. UCRT is available as system update packages (KB2999226). - 10 and onwards: Integrated in the base OS. Any OS preceding XP will not be supported with UCRT. If people want their executables to work without installing UCRT, they need to ship the redistributable binaries (apisetstub + ucrtbase.dll) from MS's SDK, located in: C:\Program Files (x86)\Windows Kits\10\Redist\%SDKVER%\ucrt\DLLs\ like how one has to ship msvcp##.dll for builds linking with CRT other than libmsvcrt-os.a. Read mingw-w64-doc/howto-build/crt-libraries.txt for more info. --- Many projects now want a Windows on ARM target. We'd also like to build Wine using Fedora's toolchain and libraries. This could be the opportunity to add the toolchain for ucrtarm and ucrtarm64 (names TBD). The toolchain might need a patched GCC and binutils; please see the patchsets at https://github.com/Windows-on-ARM-Experiments. Otherwise we could use Clang, like what MSYS2 does now. However, we don't want to default to libc++, unlike MSYS2. We might or might not want to add a target for ARMNT (32-bit ARM on Windows): Good: Wine and Wine Mono have ARMNT and WoW support, which requires a toolchain. Bad: Microsoft already sunsetted their support. SDK 26100 removed ARM32 libraries, and OS 26100^ removed ARM32 UWP app support. There isn't support for ARMNT in GCC/binutils. Fedora doesn't target 32-bit ARM. We also don't have CONFIG_COMPAT=y on all flavors of kernel. ^: actually should be an earlier canary build, but i forgor Additionally, there could be support for generating code with ARM64EC ABI (https://learn.microsoft.com/en-us/windows/arm/arm64ec). This can be further improved by producing CHPEV2 fat binaries (https://learn.microsoft.com/en-us/windows/arm/arm64x-pe) LLVM should already have preliminary support for ARM64EC codegen and ARM64X linking in llvm-21, but GCC and binutils still do not have much support. --- We might also want to lower the support tier for MSVCRT or just drop it. Otherwise, we will have too many targets to maintain. -- _______________________________________________ mingw mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/[email protected] Do not reply to spam, report it: https://forge.fedoraproject.org/infra/tickets/issues/new
