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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/utils/LoggingOutputStream.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/utils/LoggingOutputStream.java
new file mode 100644
index 000000000..cc87e84bd
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/codegen/utils/LoggingOutputStream.java
@@ -0,0 +1,50 @@
+package org.simantics.scl.compiler.internal.codegen.utils;
+
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStream;
+
+import org.slf4j.Logger;
+
+public class LoggingOutputStream extends OutputStream {
+
+    private final ByteArrayOutputStream baos = new ByteArrayOutputStream(1000);
+    private final Logger logger;
+    private final LogLevel level;
+
+    public enum LogLevel {
+        TRACE, DEBUG, INFO, WARN, ERROR,
+    }
+
+    public LoggingOutputStream(Logger logger, LogLevel level) {
+        this.logger = logger;
+        this.level = level;
+    }
+
+    @Override
+    public void write(int b) {
+        if (b == '\n') {
+            String line = baos.toString();
+            baos.reset();
+
+            switch (level) {
+            case TRACE:
+                logger.trace(line);
+                break;
+            case DEBUG:
+                logger.debug(line);
+                break;
+            case ERROR:
+                logger.error(line);
+                break;
+            case INFO:
+                logger.info(line);
+                break;
+            case WARN:
+                logger.warn(line);
+                break;
+            }
+        } else {
+            baos.write(b);
+        }
+    }
+}