internal/rosa/llvm: migrate compiler-rt helper

This also removes unused dependencies.

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

internal/rosa/llvm.go

@@ -70,11 +70,20 @@ func (t Toolchain) newLLVMVariant(variant string, attr *llvmAttr) pkg.Artifact {
 
 func (t Toolchain) newCompilerRT() (pkg.Artifact, string) {
 	muslHeaders, _ := t.newMusl(true)
-	return t.newLLVMVariant("compiler-rt", &llvmAttr{
-		env: stage0ExclConcat(t, []string{},
+	return t.NewPackage("llvm", llvmVersion, llvmSource, &PackageAttr{
+		Patches: llvmPatches,
+		NonStage0: []pkg.Artifact{
+			muslHeaders,
+		},
+		Env: stage0ExclConcat(t, []string{},
 			"LDFLAGS="+earlyLDFLAGS(false),
 		),
-		cmake: []KV{
+		Flag: TExclusive,
+	}, &CMakeHelper{
+		Variant: "compiler-rt",
+		Append:  []string{"compiler-rt"},
+
+		Cache: []KV{
 			{"CMAKE_BUILD_TYPE", "Release"},
 
 			{"LLVM_HOST_TRIPLE", `"${ROSA_TRIPLE}"`},
@@ -95,11 +104,7 @@ func (t Toolchain) newCompilerRT() (pkg.Artifact, string) {
 			{"COMPILER_RT_BUILD_PROFILE", "OFF"},
 			{"COMPILER_RT_BUILD_XRAY", "OFF"},
 		},
-		append: []string{"compiler-rt"},
-		nonStage0: []pkg.Artifact{
-			muslHeaders,
-		},
-		script: `
+		Script: `
 mkdir -p "/work/system/lib/clang/` + llvmVersionMajor + `/lib/"
 ln -s \
 	"../../../${ROSA_TRIPLE}" \
@@ -112,7 +117,11 @@ ln -s \
 	"clang_rt.crtend-` + linuxArch() + `.o" \
 	"/work/system/lib/${ROSA_TRIPLE}/crtendS.o"
 `,
-	}), llvmVersion
+	},
+		Python,
+
+		KernelHeaders,
+	), llvmVersion
 }
 func init() {
 	artifactsM[LLVMCompilerRT] = Metadata{