internal/rosa/llvm: migrate musl

This removes the pointless special treatment given to musl.

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

internal/rosa/musl.go

@@ -4,7 +4,6 @@ import "hakurei.app/internal/pkg"
 
 func (t Toolchain) newMusl(
 	headers bool,
-	env []string,
 	extra ...pkg.Artifact,
 ) (pkg.Artifact, string) {
 	const (
@@ -47,7 +46,15 @@ rmdir -v /work/lib
 		// expected to be writable in copies
 		Chmod: true,
 
-		Env: env,
+		Env: stage0ExclConcat(t, []string{
+			"CC=clang",
+			"LIBCC=/system/lib/clang/" + llvmVersionMajor + "/lib/" +
+				triplet() + "/libclang_rt.builtins.a",
+			"AR=ar",
+			"RANLIB=ranlib",
+		},
+			"LDFLAGS="+earlyLDFLAGS(false),
+		),
 	}, &helper,
 		Coreutils,
 	), version
@@ -55,7 +62,7 @@ rmdir -v /work/lib
 func init() {
 	artifactsM[Musl] = Metadata{
 		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.newMusl(false, nil)
+			return t.newMusl(false, t.Load(LLVMCompilerRT))
 		},
 
 		Name:        "musl",