2020-11-30 08:33:03 +00:00
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{ lib, rust, rustPlatform, fetchFromGitHub }:
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let
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mkBlogOsTest = target: rustPlatform.buildRustPackage rec {
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name = "blog_os-sysroot-test";
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src = fetchFromGitHub {
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owner = "phil-opp";
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repo = "blog_os";
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rev = "4e38e7ddf8dd021c3cd7e4609dfa01afb827797b";
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sha256 = "0k9ipm9ddm1bad7bs7368wzzp6xwrhyfzfpckdax54l4ffqwljcg";
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};
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2021-05-28 09:39:13 +00:00
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cargoSha256 = "1x8iwgy1irgfkv2yjkxm6479nwbrk82b0c80jm7y4kw0s32r01lg";
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2020-11-30 08:33:03 +00:00
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inherit target;
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RUSTFLAGS = "-C link-arg=-nostartfiles";
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# Tests don't work for `no_std`. See https://os.phil-opp.com/testing/
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doCheck = false;
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meta = with lib; {
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description = "Test for using custom sysroots with buildRustPackage";
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maintainers = with maintainers; [ aaronjanse ];
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platforms = lib.platforms.x86_64;
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};
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};
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# The book uses rust-lld for linking, but rust-lld is not currently packaged for NixOS.
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# The justification in the book for using rust-lld suggests that gcc can still be used for testing:
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# > Instead of using the platform's default linker (which might not support Linux targets),
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# > we use the cross platform LLD linker that is shipped with Rust for linking our kernel.
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# https://github.com/phil-opp/blog_os/blame/7212ffaa8383122b1eb07fe1854814f99d2e1af4/blog/content/second-edition/posts/02-minimal-rust-kernel/index.md#L157
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targetContents = {
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"llvm-target" = "x86_64-unknown-none";
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"data-layout" = "e-m:e-i64:64-f80:128-n8:16:32:64-S128";
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"arch" = "x86_64";
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"target-endian" = "little";
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"target-pointer-width" = "64";
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"target-c-int-width" = "32";
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"os" = "none";
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"executables" = true;
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"linker-flavor" = "gcc";
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"panic-strategy" = "abort";
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"disable-redzone" = true;
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"features" = "-mmx,-sse,+soft-float";
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};
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in {
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blogOS-targetByFile = mkBlogOsTest (builtins.toFile "x86_64-blog_os.json" (builtins.toJSON targetContents));
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blogOS-targetByNix = let
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plat = lib.systems.elaborate { config = "x86_64-none"; } // {
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rustc = {
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config = "x86_64-blog_os";
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platform = targetContents;
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};
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};
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in mkBlogOsTest (rust.toRustTargetSpec plat);
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}
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