Added a cross compilation test for wasm32-unknown-unknown. This also
required using crate.metadata instead of using the regex to get rid of
the hash in the library filename. It also required adding a mkCrate
argument to assertOutputs so we can override the buildRustCrate used.
With this change you will finally be able to use
buildRustCrate/crate2nix to build your wasm32-unknown-unknown
rust projects.
Simply import nixpkgs like so:
```
lib = <nixpkgs/lib>;
pkgsForWasm32 = import <nixpkgs> {
crossSystem = lib.examples.wasm32-unknown-none;
}
```
or use pkgsCross directly with
```
pkgsCross.wasm32-unknown-none.callPackage ./. { };
```
In order to allow for the new `cargo::` prefix for build script outputs
we have to adjust the configure-crate bash scripts in buildRustCrate to
properly parse the new additional syntax.
These changes don't affect existing build scripts configured with the
old `cargo:` prefix.
For more information, see https://doc.rust-lang.org/cargo/reference/build-scripts.html#outputs-of-the-build-script
When cross compiling proc macros, the proc macro needs to be built for the
build platform's architecture.
Without this change cross compiling from Darwin to Linux would simply
fail because it tries to link to a library with a file extension that
doesn't exist on the builder's platform.
Seeing the following new warnings pop up on stderr when cargo was bumped
to 1.78:
```
warning: `/build/.cargo/config` is deprecated in favor of `config.toml`
note: if you need to support cargo 1.38 or earlier, you can symlink `config` to `config.toml`
```
which happens to break commitmsgfmt builds in nix (#320294).
closes#320294
Switched to a common attribute for library file extensions:
de70971c90
This makes buildRustCrate evaluate successfully when using
pkgsCross/pkgsStatic.
--frozen is stricter than we need in Nixpkgs. If a Cargo.lock is
slightly wrong, or (in my use case) if building a subproject that is
not a member of the top-level workspace, but the correct Cargo.lock
can be entirely resolved from the existing top-level Cargo.lock, it
should be deterministic, and shouldn't cause any problems, to let
cargo generate the new Cargo.lock. This should result in less need to
bother upstreams about fixing their Cargo.lock files in cases where
they could have been automatically fixed.
This fixes at least one bug with default-features, and also
just aligns us more with what Cargo actually does.
Also some Python style fixes and a bit less mutating state.
Replace `src = ./.` instances with more explicit source listings.
Otherwise, derivations will be rebuilt on any change to the files
defining them (e.g. formatting via nixfmt-rfc-style).
We need to set -crt-static on musl for rustdoc as well, so let's unify
the wrappers. Ideally, rather than wrapping rustdoc, we'd have
rustdoc use the wrapped rustc, but that's currently only possible with
an unstable option (--test-builder).
The options set by the wrapper, -C target-feature and --sysroot, are
supported by both rustdoc and rustc, but other flags maybe not be
supported by both, so I've introduced different environment
variables (the existing NIX_RUSTFLAGS and a new NIX_RUSTDOCFLAGS) to
allow those to be set independently.
This fixes cargo-auditable in pkgsMusl., which broke because its
doctests stopped working when -crt-static was moved to the wrapper.
Fixes: 79156bf13a ("rustc: move crt-static default override to wrapper (#291829)")
Previously, when cross compiling from non-musl to musl, the crt-static
default override wouldn't be applied, because the compiler wouldn't
have been built with it due to fastCross. Moving it to the wrapper
fixes this without having to introduce extra compiler rebuilds. And
because the wrapper is applied even to the bootstrap rustc, we no
longer need special handling of crt-static in the Cargo expression.
Unlike --sysroot, rustc allows -C target-feature= to be passed
multiple times, with later instances taking precedence over earlier
ones. This means that it's very easy to set the default in the
wrapper, just by our overridden default before any other arguments.
This fixes pkgsCross.aarch64-multiplatform-musl.mesa from x86_64-linux.
The unwrapped version doesn't know where to look for libraries, so
this is required to e.g. build anything that uses openssl-sys with
OPENSSL_NO_VENDOR. A randomly chosen example package that's fixed by
this change is pkgsStatic.gitoxide.
We're already using pkgsBuildBuild, and we'll soon be using
pkgsBuildTarget, so for consistency, change buildPackages and
targetPackages to their corresponding two-component names.
Prior to this change, the `importCargoLock` git dependency builder
assumed that the workspace root that needed to be passed to
`replace-workspace-values` will always be the root directory of the git
repository.
This is not always the case as independent workspace roots may be used
from subdirectories, and packages be referenced via paths. An example of
this is [1], where the `iced` subdirectory is its own independent
workspace, and workspace values for packages within it should be pulled
from the `iced` subdirectory as the workspace root, not from the
top-level of the fetched repository.
[1]: b8f1a366dd/Cargo.toml
With `cargoRoot` set to a subdirectory of the source, where the
Cargo.{lock,toml} are found, the final mv would previously fail, since
the build results appear relative to cargoRoot, not to the original
build directory.
It turns out that unlike a normal Unix program, if the --sysroot
option is given more than once, rustc will error rather than using the
last value given. Therefore, we need to ensure we only add our
default --sysroot argument if one hasn't been given explicitly on the
wrapper's command line.
This fixes cross compilation of rustc.
Closes: https://github.com/NixOS/nixpkgs/issues/271736
Fixes: 8b51cdd3be ("rustc: add a compiler wrapper")
Rust 1.74 added support for configuring lints with cargo in a new
"lints" table. This also adds a new possible position to reference the
host workspace.
Fixes#273835
We keep running into situations where we can't get the right
combination of rustc flags through build systems into rustc.
RUSTFLAGS is the only variable supported across build systems, but if
RUSTFLAGS is set, Cargo will ignore all other ways of specifying rustc
flags, including the target-specific ones, which we need to make
dynamic musl builds work. (This is why pkgsCross.musl64.crosvm is
currently broken — it works if you unset separateDebugInfo, which
causes RUSTFLAGS not to be set.)
So, we need to do the same thing we do for C and C++ compilers, and
add a compiler wrapper so we can inject the flags we need, regardless
of the build system.
Currently the wrapper only supports a single mechanism for injecting
flags — the NIX_RUSTFLAGS environment variable. As time goes on,
we'll probably want to add additional features, like target-specific
environment variables.
