internal/rosa/cmake: expose earlier build script

This allows for more flexible build setups.

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

internal/rosa/llvm.go

@@ -22,12 +22,18 @@ type llvmAttr struct {
 	cmake [][2]string
 	// Override CMakeAttr.Append.
 	append []string
-	// Concatenated with default dependencies for CMakeAttr.Extra.
+	// Concatenated with default dependencies for Toolchain.NewViaCMake.
 	extra []pkg.Artifact
+	// Passed through to CMakeAttr.Paths.
+	paths []pkg.ExecPath
+	// Passed through to CMakeAttr.ScriptConfigured.
+	scriptConfigured string
 	// Concatenated with default fixup for CMakeAttr.Script.
 	script string
 	// Passed through to CMakeAttr.Prefix.
 	prefix *check.Absolute
+	// Passed through to CMakeAttr.Writable.
+	writable bool
 
 	// Patch name and body pairs.
 	patches [][2]string
@@ -186,9 +192,13 @@ cp -r /system/include /usr/include && rm -rf /system/include
 			"ROSA_LLVM_PROJECTS=" + strings.Join(projects, ";"),
 			"ROSA_LLVM_RUNTIMES=" + strings.Join(runtimes, ";"),
 		}, attr.env),
-		ScriptEarly: scriptEarly, Script: script + attr.script,
+		ScriptEarly:      scriptEarly,
+		ScriptConfigured: attr.scriptConfigured,
+		Script:           script + attr.script,
+		Writable:         attr.writable,
 
-		Flag: TExclusive,
+		Paths: attr.paths,
+		Flag:  TExclusive,
 	}, stage3Concat(t, attr.extra,
 		t.Load(Libffi),
 		t.Load(Python),