test: 3 attempts to avoid clang errors

compiler/internal/build/build_test.go

@@ -9,24 +9,45 @@ import (
 )
 
 func mockRun(args []string, cfg *Config) {
-	mockable.EnableMock()
-	defer func() {
-		if r := recover(); r != nil {
-			if r != "exit" {
-				panic(r)
-			} else {
-				exitCode := mockable.ExitCode()
-				if (exitCode != 0) != false {
-					panic(fmt.Errorf("got exit code %d", exitCode))
+	const maxAttempts = 3
+	var lastErr error
+	var lastPanic interface{}
+	for attempt := 0; attempt < maxAttempts; attempt++ {
+		mockable.EnableMock()
+		func() {
+			defer func() {
+				if r := recover(); r != nil {
+					if r != "exit" {
+						lastPanic = r
+					} else {
+						exitCode := mockable.ExitCode()
+						if (exitCode != 0) != false {
+							lastPanic = fmt.Errorf("got exit code %d", exitCode)
+						}
+					}
 				}
+			}()
+			file, _ := os.CreateTemp("", "llgo-*")
+			cfg.OutFile = file.Name()
+			file.Close()
+			defer os.Remove(cfg.OutFile)
+			_, err := Do(args, cfg)
+			if err == nil {
+				return // Success, return immediately from the inner function
 			}
+			lastErr = err
+		}()
+
+		if lastPanic == nil && lastErr == nil {
+			return // Success, return from mockRun
 		}
-	}()
-	file, _ := os.CreateTemp("", "llgo-*")
-	cfg.OutFile = file.Name()
-	file.Close()
-	defer os.Remove(cfg.OutFile)
-	Do(args, cfg)
+		// Continue to next attempt if this one failed
+	}
+	// If we get here, all attempts failed
+	if lastPanic != nil {
+		panic(lastPanic)
+	}
+	panic(fmt.Errorf("all %d attempts failed, last error: %v", maxAttempts, lastErr))
 }
 
 func TestRun(t *testing.T) {