internal/rosa/llvm: migrate compiler-rt

The newLLVM family of functions predate the package system. This change migrates compiler-rt without changing any resulting artifacts.

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

cmd/mbf/main.go

@@ -396,9 +396,9 @@ func main() {
 					rosa.SetGentooStage3(flagGentoo, checksum)
 				}
 
-				_, _, _, stage1 := (t - 2).NewLLVM()
-				_, _, _, stage2 := (t - 1).NewLLVM()
-				_, _, _, stage3 := t.NewLLVM()
+				_, _, stage1 := (t - 2).NewLLVM()
+				_, _, stage2 := (t - 1).NewLLVM()
+				_, _, stage3 := t.NewLLVM()
 				var (
 					pathname *check.Absolute
 					checksum [2]unique.Handle[pkg.Checksum]
@@ -577,8 +577,9 @@ func main() {
 				root = rosa.Std.AppendPresets(root, presets...)
 
 				if flagWithToolchain {
-					musl, compilerRT, runtimes, clang := (rosa.Std - 1).NewLLVM()
-					root = append(root, musl, compilerRT, runtimes, clang)
+					boot := rosa.Std - 1
+					musl, runtimes, clang := boot.NewLLVM()
+					root = append(root, musl, boot.Load(rosa.LLVMCompilerRT), runtimes, clang)
 				} else {
 					root = append(root, rosa.Std.Load(rosa.Musl))
 				}

internal/rosa/llvm.go

@@ -68,34 +68,12 @@ func (t Toolchain) newLLVMVariant(variant string, attr *llvmAttr) pkg.Artifact {
 	)
 }
 
-// newLLVM returns LLVM toolchain across multiple [pkg.Artifact].
-func (t Toolchain) newLLVM() (musl, compilerRT, runtimes, clang pkg.Artifact) {
-	target := "'AArch64;RISCV;X86'"
-	if t.isStage0() {
-		switch runtime.GOARCH {
-		case "386", "amd64":
-			target = "X86"
-		case "arm64":
-			target = "AArch64"
-		case "riscv64":
-			target = "RISCV"
-
-		default:
-			panic("unsupported target " + runtime.GOARCH)
-		}
-	}
-
-	minimalDeps := []KV{
-		{"LLVM_ENABLE_ZLIB", "OFF"},
-		{"LLVM_ENABLE_ZSTD", "OFF"},
-		{"LLVM_ENABLE_LIBXML2", "OFF"},
-	}
-
+func (t Toolchain) newCompilerRT() (pkg.Artifact, string) {
 	muslHeaders, _ := t.newMusl(true, []string{
 		"CC=clang",
 	})
 
-	compilerRT = t.newLLVMVariant("compiler-rt", &llvmAttr{
+	return t.newLLVMVariant("compiler-rt", &llvmAttr{
 		env: stage0ExclConcat(t, []string{},
 			"LDFLAGS="+earlyLDFLAGS(false),
 		),
@@ -137,7 +115,42 @@ ln -s \
 	"clang_rt.crtend-` + linuxArch() + `.o" \
 	"/work/system/lib/${ROSA_TRIPLE}/crtendS.o"
 `,
-	})
+	}), llvmVersion
+}
+func init() {
+	artifactsM[LLVMCompilerRT] = Metadata{
+		f: Toolchain.newCompilerRT,
+
+		Name:        "llvm-compiler-rt",
+		Description: "LLVM runtime: compiler-rt",
+		Website:     "https://llvm.org/",
+	}
+}
+
+// newLLVM returns LLVM toolchain across multiple [pkg.Artifact].
+func (t Toolchain) newLLVM() (musl, runtimes, clang pkg.Artifact) {
+	target := "'AArch64;RISCV;X86'"
+	if t.isStage0() {
+		switch runtime.GOARCH {
+		case "386", "amd64":
+			target = "X86"
+		case "arm64":
+			target = "AArch64"
+		case "riscv64":
+			target = "RISCV"
+
+		default:
+			panic("unsupported target " + runtime.GOARCH)
+		}
+	}
+
+	minimalDeps := []KV{
+		{"LLVM_ENABLE_ZLIB", "OFF"},
+		{"LLVM_ENABLE_ZSTD", "OFF"},
+		{"LLVM_ENABLE_LIBXML2", "OFF"},
+	}
+
+	compilerRT := t.Load(LLVMCompilerRT)
 
 	musl, _ = t.newMusl(false, stage0ExclConcat(t, []string{
 		"CC=clang",
@@ -227,20 +240,9 @@ ninja check-all
 	return
 }
 func init() {
-	artifactsM[LLVMCompilerRT] = Metadata{
-		f: func(t Toolchain) (pkg.Artifact, string) {
-			_, compilerRT, _, _ := t.newLLVM()
-			return compilerRT, llvmVersion
-		},
-
-		Name:        "llvm-compiler-rt",
-		Description: "LLVM runtime: compiler-rt",
-		Website:     "https://llvm.org/",
-	}
-
 	artifactsM[LLVMRuntimes] = Metadata{
 		f: func(t Toolchain) (pkg.Artifact, string) {
-			_, _, runtimes, _ := t.newLLVM()
+			_, runtimes, _ := t.newLLVM()
 			return runtimes, llvmVersion
 		},
 
@@ -251,7 +253,7 @@ func init() {
 
 	artifactsM[LLVMClang] = Metadata{
 		f: func(t Toolchain) (pkg.Artifact, string) {
-			_, _, _, clang := t.newLLVM()
+			_, _, clang := t.newLLVM()
 			return clang, llvmVersion
 		},
 
@@ -286,15 +288,15 @@ func init() {
 
 var (
 	// llvm stores the result of Toolchain.newLLVM.
-	llvm [_toolchainEnd][4]pkg.Artifact
+	llvm [_toolchainEnd][3]pkg.Artifact
 	// llvmOnce is for lazy initialisation of llvm.
 	llvmOnce [_toolchainEnd]sync.Once
 )
 
 // NewLLVM returns LLVM toolchain across multiple [pkg.Artifact].
-func (t Toolchain) NewLLVM() (musl, compilerRT, runtimes, clang pkg.Artifact) {
+func (t Toolchain) NewLLVM() (musl, runtimes, clang pkg.Artifact) {
 	llvmOnce[t].Do(func() {
-		llvm[t][0], llvm[t][1], llvm[t][2], llvm[t][3] = t.newLLVM()
+		llvm[t][0], llvm[t][1], llvm[t][2] = t.newLLVM()
 	})
-	return llvm[t][0], llvm[t][1], llvm[t][2], llvm[t][3]
+	return llvm[t][0], llvm[t][1], llvm[t][2]
 }

internal/rosa/rosa.go

@@ -329,13 +329,13 @@ mkdir -vp /work/system/bin
 		}
 
 		boot := t - 1
-		musl, compilerRT, runtimes, clang := boot.NewLLVM()
+		musl, runtimes, clang := boot.NewLLVM()
 		toybox := Toybox
 		if flag&TEarly != 0 {
 			toybox = toyboxEarly
 		}
 		std := []pkg.Artifact{cureEtc{newIANAEtc()}, musl}
-		toolchain := []pkg.Artifact{compilerRT, runtimes, clang}
+		toolchain := []pkg.Artifact{boot.Load(LLVMCompilerRT), runtimes, clang}
 		utils := []pkg.Artifact{
 			boot.Load(Mksh),
 			boot.Load(toybox),

internal/rosa/stage0.go

@@ -7,10 +7,10 @@ import (
 )
 
 func (t Toolchain) newStage0() (pkg.Artifact, string) {
-	musl, compilerRT, runtimes, clang := t.NewLLVM()
+	musl, runtimes, clang := t.NewLLVM()
 	return t.New("rosa-stage0", 0, []pkg.Artifact{
 		musl,
-		compilerRT,
+		t.Load(LLVMCompilerRT),
 		runtimes,
 		clang,