internal/rosa/llvm: separate major version

For pathname formatting at compile time.

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

internal/rosa/llvm.go

@@ -73,7 +73,10 @@ func llvmFlagName(flag int) string {
 	}
 }
 
-const llvmVersion = "22.1.0"
+const (
+	llvmVersionMajor = "22"
+	llvmVersion      = llvmVersionMajor + ".1.0"
+)
 
 // newLLVMVariant returns a [pkg.Artifact] containing a LLVM variant.
 func (t Toolchain) newLLVMVariant(variant string, attr *llvmAttr) pkg.Artifact {
@@ -245,10 +248,10 @@ func (t Toolchain) newLLVM() (musl, compilerRT, runtimes, clang pkg.Artifact) {
 			muslHeaders,
 		},
 		script: `
-mkdir -p "/work/system/lib/clang/21/lib/"
+mkdir -p "/work/system/lib/clang/` + llvmVersionMajor + `/lib/"
 ln -s \
 	"../../../${ROSA_TRIPLE}" \
-	"/work/system/lib/clang/21/lib/"
+	"/work/system/lib/clang/` + llvmVersionMajor + `/lib/"
 
 ln -s \
 	"clang_rt.crtbegin-` + linuxArch() + `.o" \
@@ -261,7 +264,7 @@ ln -s \
 
 	musl, _ = t.newMusl(false, stage0ExclConcat(t, []string{
 		"CC=clang",
-		"LIBCC=/system/lib/clang/21/lib/" +
+		"LIBCC=/system/lib/clang/" + llvmVersionMajor + "/lib/" +
 			triplet() + "/libclang_rt.builtins.a",
 		"AR=ar",
 		"RANLIB=ranlib",

internal/rosa/rosa.go

@@ -329,7 +329,7 @@ mkdir -vp /work/system/bin
 
 			"AR=ar",
 			"RANLIB=ranlib",
-			"LIBCC=/system/lib/clang/21/lib/" + triplet() +
+			"LIBCC=/system/lib/clang/" + llvmVersionMajor + "/lib/" + triplet() +
 				"/libclang_rt.builtins.a",
 		}, "/system/bin", "/bin")