Prior to this commit, builds of
`pkgsCross.aarch64-multiplatform.cargo` would fail due to being
unable to find `-lz` when compiling cargo's own `build.rs` for the
`buildPlatform`.
This environment variable uses the (very confusing) LLVM convention
of calling the buildPlatform "HOST".
Co-authored-by: figsoda <figsoda@pm.me>
Our `rustc.nix` adds a `--target` flag for the host when doing a
host!=target build, but neglects to add a `--target` flag for the
buildPlatform when doing a build!=(host==target) build. This commit
corrects that.
Before rustc 1.68 omitting the --target flag for the buildPlatform
did not cause any problems. As of rustc 1.68, build!=host without a
--target for the build will fail like below (with hundreds more
"cannot find std::" errors.
```
$ nix build -f . -L pkgsCross.aarch64-multiplatform.rustc
...
Copying stage1 library from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / aarch64-unknown-linux-gnu)
Uplifting stage1 library (x86_64-unknown-linux-gnu -> aarch64-unknown-linux-gnu)
Copying stage2 library from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / aarch64-unknown-linux-gnu)
Building stage2 tool rust-analyzer-proc-macro-srv (aarch64-unknown-linux-gnu)
Compiling autocfg v1.1.0
Compiling libc v0.2.135
Compiling cfg-if v1.0.0
Compiling proc-macro2 v1.0.47
Compiling quote v1.0.21
Compiling unicode-ident v1.0.5
Compiling syn v1.0.102
Compiling once_cell v1.15.0
Compiling parking_lot_core v0.9.4
Compiling serde_derive v1.0.145
Compiling hashbrown v0.12.3
Compiling scopeguard v1.1.0
Compiling smallvec v1.10.0
Compiling log v0.4.17
Compiling serde v1.0.145
Compiling rustc-hash v1.1.0
error[E0463]: can't find crate for `std`
error: cannot find macro `println` in this scope
--> /nix/tmp/nix-build-rustc-aarch64-unknown-linux-gnu-1.68.2.drv-0/rustc-1.68.2-src/vendor/libc-0.2.135/build.rs:7:5
|
7 | println!("cargo:rerun-if-changed=build.rs");
| ^^^^^^^
error: cannot find macro `println` in this scope
--> /nix/tmp/nix-build-rustc-aarch64-unknown-linux-gnu-1.68.2.drv-0/rustc-1.68.2-src/vendor/libc-0.2.135/build.rs:16:9
|
16 | println!(
| ^^^^^^^
error: cannot find macro `println` in this scope
--> /nix/tmp/nix-build-rustc-aarch64-unknown-linux-gnu-1.68.2.drv-0/rustc-1.68.2-src/vendor/libc-0.2.135/build.rs:29:13
|
29 | println!("cargo:rustc-cfg=freebsd10")
| ^^^^^^^
```
bumping `llvmPackages_git` to match `llvmPackages_15`; this will let us
continuing bringing `llvmPackages_git` to parity with `llvmPackages_15`
without needing to invest time and effort into getting the current
llvmPackages_git's commit's test suite to pass under all the platforms,
etc.
this will also allow us to begin diffing derivations between
`llvmPackages_15` and `llvmPackages_git` as a way of tracking down
remaining differences between the package sets
Some Flutter packages require additional attribute values to be added to buildFlutterApplication, to add things like libraries and environment variables.
To prevent duplication in applications that use the packages, a repository of package overrides is kept. buildFlutterApplication will look for package overrides for each dependency, and apply them by calling overrideAttrs on itself.
