support CLANG32 system too

[past-due]

No description provided.

[Biswa96]

Remember clang32 has only minimal toolchain (compiler, crt) packages, not every libraries.

[past-due]

Remember clang32 has only minimal toolchain (compiler, crt) packages, not every libraries.

Yep, but fortunately that's all we need. 😄

[jeremyd2019]

I have been thinking it may be about time to enable clang32 for more packages.

[Biswa96]

Wondering how many people are actually using 32bit OS for actual work. I know only one.

[jeremyd2019]

I don't know about actually using 32-bit OSes, but I've seen @revelator and @past-due now express interest in the clang32 toolchain

[past-due]

I don't know about actually using 32-bit OSes, but I've seen @revelator and @past-due now express interest in the clang32 toolchain

Indeed, the toolchain is the particular area of interest (at least until there's a clang-cross environment 😎). Believe it or not, we still have folks who want 32-bit Windows binaries.

(EDIT: One project is still at about 20% x86 build downloads, as a data point.)

[lazka]

@past-due just to be sure: you are aware that our clang32 targets ucrt and is thus more or less win10 only?

[past-due]

@past-due just to be sure: you are aware that our clang32 targets ucrt and is thus more or less win10 only?

I am aware of the UCRT targeting, however the UCRT is available for (and serviced by Windows Update on) versions of Windows prior to Windows 10 as well. (It's considered a Windows component, even on earlier versions of Windows. And there are several options to ensure it's installed.)

Reference: https://docs.microsoft.com/en-us/cpp/porting/upgrade-your-code-to-the-universal-crt?view=msvc-160#deployment-and-redistribution-of-the-universal-crt

Because the UCRT is now a Microsoft Windows operating system component, it is included as part of the operating system in Windows 10 and is available through Windows Update for older operating systems, Windows Vista through Windows 8.1. A redistributable version is available for Windows XP. As an operating system component, UCRT updates and servicing are managed by Windows Update independently of Visual Studio and Microsoft C++ compiler versions.

[mati865]

I hope that you are aware that there can be no support for clang32 subsystem from MSYS2 because of address space constrains. Getting 32-bit LLVM 12 to build itself was already hard so we might have to drop it at any LLVM upgrade.

[past-due]

I hope that you are aware that there can be no support for clang32 subsystem from MSYS2 because of address space constrains. Getting 32-bit LLVM 12 to build itself was already hard so we might have to drop it at any LLVM upgrade.

Presumably this same concern would not apply to a clang-cross environment, as described in msys2/MINGW-packages#8736 and is being worked on in msys2/MINGW-packages#8762?

Once that toolchain exists, it could theoretically be used to build the clang32 packages?

[mati865]

Once that toolchain exists, it could theoretically be used to build the clang32 packages?

That would probably require changing every PKGBUILD or inventing yet another subsystem.

[revelator]

most of the adress space restraints seem to be fixed if defaulting to large adress aware on 32 bit builds atleast im having no problems since i started using it :). UCRT is supported back to atleast vista though you have to install it manually, XP support might be a strecth though. Atm most problems are related to the clang tools not supporting the workarounds the gnu compilers have established to keep compatibility with windows builds, like version scripting etc. It would also be rather easy for a developer to just change the runtime from UCRT to MSVC if needed though they would have to do this themself.

[eine]

Thanks!

[past-due]

@eine Actually, despite CI passing, it does not appear to be downloading the clang32.db, and attempts to install mingw-w64-clang-i686-* packages fail. Hmm.

[lazka]

we didn't add any servers for it in pacman.conf

[past-due]

we didn't add any servers for it in pacman.conf

Ah, looks like we need a /etc/pacman.d/mirrorlist.clang32 as well.