3 files changed, 18 insertions, 4 deletions
diff --git a/src/main/java/com/jogamp/gluegen/jcpp/Feature.java b/src/main/java/com/jogamp/gluegen/jcpp/Feature.java
index 86202fc..1628721 100644
--- a/src/main/java/com/jogamp/gluegen/jcpp/Feature.java
+++ b/src/main/java/com/jogamp/gluegen/jcpp/Feature.java
@@ -38,5 +38,12 @@ public enum Feature {
     OBJCSYNTAX,
     INCLUDENEXT,
     /** Random extensions. */
-    PRAGMA_ONCE
+    PRAGMA_ONCE,
+    /**
+     * Unified output for reproducible platform-agnostic builds, i.e.:
+     * <ul>
+     *   <li>Use unix-file-separator '/' on all platform.</li>
+     * </ul>
+     */
+    UNIFIED_OUTPUT
 }
diff --git a/src/main/java/com/jogamp/gluegen/jcpp/JCPP.java b/src/main/java/com/jogamp/gluegen/jcpp/JCPP.java
index 3f1e057..d499372 100644
--- a/src/main/java/com/jogamp/gluegen/jcpp/JCPP.java
+++ b/src/main/java/com/jogamp/gluegen/jcpp/JCPP.java
@@ -54,6 +54,7 @@ public class JCPP implements GenericCPP {
         cpp.addFeature(Feature.DIGRAPHS);
         cpp.addFeature(Feature.TRIGRAPHS);
         cpp.addFeature(Feature.LINEMARKERS);
+        cpp.addFeature(Feature.UNIFIED_OUTPUT);
         cpp.addFeature(Feature.CSYNTAX);
         cpp.addFeature(Feature.KEEPCOMMENTS);
         if (enablePragmaOnce) {
diff --git a/src/main/java/com/jogamp/gluegen/jcpp/Preprocessor.java b/src/main/java/com/jogamp/gluegen/jcpp/Preprocessor.java
index 3427467..dc2d119 100644
--- a/src/main/java/com/jogamp/gluegen/jcpp/Preprocessor.java
+++ b/src/main/java/com/jogamp/gluegen/jcpp/Preprocessor.java
@@ -31,6 +31,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.Stack;
 import java.util.TreeMap;
+import java.util.regex.Matcher;
 
 import javax.annotation.CheckForNull;
 import javax.annotation.Nonnull;
@@ -638,10 +639,15 @@ public class Preprocessor implements Closeable {
         buf.append("#line ").append(line)
                 .append(" \"");
         /* XXX This call to escape(name) is correct but ugly. */
-        if (name == null)
+        if (name == null) {
             buf.append("<no file>");
-        else
-            MacroTokenSource.escape(buf, name);
+        } else {
+            if( File.separatorChar != '/' && getFeature(Feature.UNIFIED_OUTPUT) ) {
+                MacroTokenSource.escape(buf, name.replaceAll(Matcher.quoteReplacement(File.separator), "/"));
+            } else {
+                MacroTokenSource.escape(buf, name);
+            }
+        }
         buf.append("\"").append(extra).append("\n");
         return new Token(P_LINE, line, 0, buf.toString(), null);
     }