Date: 2024-07-16
Author: Bernhard M. Wiedemann

make .jar build reproducible
by setting the build date to a constant.

Index: db-4.8.30/dist/Makefile.in
===================================================================
--- db-4.8.30.orig/dist/Makefile.in
+++ db-4.8.30/dist/Makefile.in
@@ -830,7 +830,7 @@ $(libj_jarfile): $(JAVA_DBSRCS)
 	$(JAVA) -classpath $(JAVA_CLASSTOP) \
 	    com.sleepycat.persist.model.ClassEnhancer $(JAVA_CLASSTOP)
 	cd $(JAVA_CLASSTOP) && \
-	     $(JAR) cfm ../$(libj_jarfile) ../$(JAVA_MANIFEST) ./com/sleepycat
+	     $(JAR) --date=2000-01-01T00:00:00+00:00 -c -f ../$(libj_jarfile) -m ../$(JAVA_MANIFEST) ./com/sleepycat
 
 $(libj_exjarfile): $(libj_jarfile) $(JAVA_EXSRCS)
 	@test -d $(JAVA_EXCLASSTOP) || \