mrustc: init

This contains some extraordinarily ugly hacks for a set of even uglier
Makefiles.

Signed-off-by: Ophestra <cat@gensokyo.uk>

mrustc/package.az

@@ -27,6 +27,7 @@ package mrustc {
 		"0002-Revert-HIR-Typecheck-Optimise-by-doing-multiple-chec.patch",
 	];
 	extra = [ rustc-bootstrap-source ];
+	minimal = true;
 
 	enterSource = true;
 	writable = true;
@@ -36,7 +37,9 @@ package mrustc {
 		inPlace = true;
 		skipConfigure = true;
 		preMake = `
-export CC=gcc CXX=g++
+ln -sf gcc /system/bin/cc
+ln -sf g++ /system/bin/c++
+
 export PARLEVEL=`+jobsE+`
 export RUSTC_SOURCE='../extra/rustc-bootstrap-source'
 export RUSTC_VERSION="$(cut -d ' ' -f 1 "$RUSTC_SOURCE/version")"
@@ -59,24 +62,20 @@ make local_tests
 		check = [ "test" ];
 
 		install = `
+LLVM="$(which llvm-config)"
 OUTDIR="output-$RUSTC_VERSION"
-make -f minicargo.mk "$OUTDIR/rustc"
-make -f minicargo.mk "$OUTDIR/cargo"
-make -C run_rustc
+make -f minicargo.mk LLVM_CONFIG="$LLVM" "$OUTDIR/rustc"
+make -f minicargo.mk LLVM_CONFIG="$LLVM" "$OUTDIR/cargo"
+make -C LLVM_CONFIG="$LLVM" run_rustc
 `;
 	};
 
 	inputs = [
 		bash,
 		patch,
-		cmake,
-		pkg-config,
-		perl,
-		python,
+		llvm,
 
 		// mrustc requires buggy gcc behaviour
 		gcc,
-
-		kernel-headers,
 	];
 }