| 23 Aug 2024 |
 Theo Paris | So building a rust crate for mingw with llvm ends up trying to cross compile rustc and cargo for mingw instead of just the rust crate... What would be the correct fix for this? Additionally, building x86_64-w64-mingw32-rustc fails due to dlltool | 04:09:22 |
| Theo Paris | * So building a rust crate for mingw with llvm ends up trying to cross compile rustc and cargo for mingw instead of just the rust crate... What would be the correct fix for this? Additionally, building x86_64-w64-mingw32-rustc fails due to dlltool with pkgsLLVM | 04:09:28 |
 K900 | How are you doing that? Also, why LLVM? | 04:10:19 |
| Theo Paris | (import nixpkgs {
system = "x86_64-linux";
crossSystem = {
system = "x86_64-windows";
rust = {
rustcTarget = "x86_64-pc-windows-gnu";
};
};
}).pkgsLLVM.pkgsCross.mingwW64
| 04:10:58 |
| Theo Paris | If I set useLLVM and linker to lld in crossSystem instead of outside crossSystem, it fails to build compiler-rt-libc. | 04:11:32 |
| Theo Paris | * If I set useLLVM and linker to lld in crossSystem instead of outside crossSystem, it fails to build compiler-rt-libc, probably because it tries to use lld flags with lld-link | 04:12:12 |
| K900 | Yeah this is very wrong for a variety of reasons | 04:14:21 |
| K900 | What are you trying to achieve here | 04:14:28 |
| K900 | Do you want MinGW or MSVC | 04:14:37 |
| Theo Paris | I am trying to cross compile a rust crate with mingw and LLVM. | 04:14:55 |
| K900 | This makes no sense because MinGW is GNU | 04:15:30 |
| K900 | So do you want MinGW or LLVM | 04:15:37 |
| Theo Paris | I wanted mingw because its posix | 04:15:46 |
| K900 | Then why is LLVM even there | 04:16:00 |
| Theo Paris | Because I want to use llvm tools and clang instead of gcc | 04:16:19 |
| K900 | Why? | 04:16:45 |
| Theo Paris | If there is a way to uses clang/lld-link to cross compile without mingw then I have no idea what that way would be. | 04:16:55 |
| K900 | MinGW is generally only tested with the GNU toolchain | 04:17:00 |
| K900 | There is a way, yes | 04:17:12 |
| K900 | The way is to use the native MSVC ABI targets | 04:17:20 |
| K900 | See e.g. https://gitlab.com/K900/rust-cross-windows | 04:17:37 |
| Theo Paris | That requires the proprietary msvc libraries, but it's certainly something I can try. I'd like to be able to get llvm and mingw to work with nix in the future if that is possible to achieve. | 04:19:44 |
| K900 | It is probably possible, but it's going to be a sizable amount of work, and honestly, MinGW is a gigantic hack anyway | 04:20:15 |
| K900 | I personally would much prefer to see better support for MSVC targets | 04:20:28 |
| K900 | But that's way harder | 04:20:32 |
| Theo Paris | I did get closer outside of nix/nixpkgs by using rust-lld with x86_64-pc-windows-gnullvm but ran into the fact that rustc hard codes the --nxcompat flag for windows targets, which fails to work with lld-link.
So I think the crossSystem and compiler-rt issues are specific to nixpkgs | 04:21:47 |
| Theo Paris | * I did get closer outside of nix/nixpkgs by using lld with x86_64-pc-windows-gnullvm but ran into the fact that rustc hard codes the --nxcompat flag for windows targets, which fails to work with lld-link.
So I think the crossSystem and compiler-rt issues are specific to nixpkgs | 04:22:09 |
| Theo Paris | * I did get closer outside of nix/nixpkgs by using lld-link with x86_64-pc-windows-gnullvm but ran into the fact that rustc hard codes the --nxcompat flag for windows targets, which fails to work with lld-link.
So I think the crossSystem and compiler-rt issues are specific to nixpkgs | 04:22:24 |
 aktaboot | what do you usually do to get rust-nightly packages in your system ? | 17:53:32 |
| K900 | rust-overlay or fenix | 17:56:46 |
