mrustc: init

This contains some extraordinarily ugly hacks for a set of even uglier Makefiles. Signed-off-by: Ophestra <cat@gensokyo.uk>
2026-07-19 13:56:15 +09:00
parent a1b0a10fcf
commit 60e0030e9b
4 changed files with 257 additions and 0 deletions
@@ -0,0 +1,121 @@
+package mrustc-source {
+	description = "patched mrustc source tree";
+	exclude = true;
+
+	version# = "0.12.0";
+	output = remoteGitHub {
+		suffix = "thepowersgang/mrustc";
+		tag = "v"+version;
+		checksum = "Db25OAKL_1yZIF6MlXOTHhrEJ-Pd-i-accVtt5rJollmpKm6B3bgS0xN7hoC1cVu";
+	};
+	chmod = true;
+	patches = [
+		"0001-do-not-download-rustc.patch",
+		"0002-Revert-HIR-Typecheck-Optimise-by-doing-multiple-chec.patch",
+
+		"remove-git-invocations.patch",
+	];
+}
+
+package mrustc {
+	description = "alternative rust compiler (re-implementation)";
+	website = "https://github.com/thepowersgang/mrustc";
+	anitya = 391250;
+
+	source = mrustc-source;
+	enterSource = true;
+	writable = true;
+
+	minimal = true;
+	exec = make {
+		inPlace = true;
+		skipConfigure = true;
+		make = [ "CXX='g++ -w'" ];
+		// test suite runs during rustc-bootstrap
+		skipCheck = true;
+		install = "install -vD bin/mrustc /work/system/bin/mrustc";
+	};
+
+	inputs = [
+		bash,
+
+		// mrustc requires buggy gcc behaviour
+		gcc,
+	];
+
+	runtime = [ gcc ];
+}
+
+package rustc-bootstrap-source {
+	description = "rustc source tree used by mrustc";
+	exclude = true;
+
+	version# = "1.90.0";
+	output = remoteTar {
+		url = "https://static.rust-lang.org/dist/rustc-"+version+"-src.tar.gz";
+		compress = gzip;
+		checksum = "kUjk5mOHRc7cTom0uJ5afFTkhFcXLYK8tJl_aqduffGSHc0TH_a-KKz6PI0nk_xK";
+	};
+	chmod = true;
+}
+
+package rustc-bootstrap {
+	description = "rust toolchain bootstrapped via mrustc";
+	exclude = true;
+
+	source = mrustc-source;
+	extra = [ rustc-bootstrap-source ];
+
+	enterSource = true;
+	writable = true;
+
+	exec = make {
+		inPlace = true;
+		skipConfigure = true;
+		preMake = `
+export PARLEVEL=`+jobsE+`
+export RUSTC_SOURCE='../extra/rustc-bootstrap-source'
+export RUSTC_VERSION="$(cut -d ' ' -f 1 "$RUSTC_SOURCE/version")"
+export MRUSTC_TARGET_VER="$(cut -d '.' -f 1,2 <<< "$RUSTC_VERSION")"
+export OUTDIR_SUF="-$RUSTC_VERSION"
+patch -d "$RUSTC_SOURCE" -p0 < "rustc-$RUSTC_VERSION-src.patch"
+touch "$RUSTC_SOURCE/dl-version"
+
+ln -s "$RUSTC_SOURCE" "rustc-$RUSTC_VERSION-src"
+mkdir bin && ln -s /system/bin/mrustc bin/
+`;
+		make = [
+			"-f",
+			"minicargo.mk",
+			"CC=gcc",
+			"CXX='g++ -w'",
+			"LIBS",
+		];
+		check = [
+			"CC=gcc",
+			"CXX='g++ -w'",
+			"test",
+			"local_tests",
+		];
+
+		install = `
+export CC=gcc CXX=g++
+OUTDIR="output-$RUSTC_VERSION"
+make -f minicargo.mk "$OUTDIR/rustc"
+make -f minicargo.mk "$OUTDIR/cargo"
+make -C run_rustc
+`;
+	};
+
+	inputs = [
+		bash,
+		patch,
+		cmake,
+		pkg-config,
+		perl,
+		python,
+		mrustc,
+
+		kernel-headers,
+	];
+}