--- make-4.1.orig/Makefile.in	Sun Oct  5 09:25:22 2014
+++ make-4.1/Makefile.in	Sat Oct 31 13:56:50 2015
@@ -1265,6 +1265,26 @@
 	  echo "Can't find the GNU Make test suite ($(srcdir)/tests)."; \
 	 fi
 
+system-test:
+	@if test -f "$(srcdir)/tests/run_make_tests"; then \
+	  if $(PERL) -v >/dev/null 2>&1; then \
+	    case `cd $(srcdir); pwd` in `pwd`) : ;; \
+	      *) test -d tests || mkdir tests; \
+		 rm -f srctests; \
+		 if ln -s "$(srcdir)/tests" srctests; then \
+		   for f in run_make_tests run_make_tests.pl test_driver.pl scripts; do \
+		     rm -f tests/$$f; ln -s ../srctests/$$f tests; \
+		   done; fi ;; \
+	    esac; \
+	    echo "cd tests && $(PERL) ./run_make_tests.pl -make /usr/bin/gmake $(MAKETESTFLAGS)"; \
+	    cd tests && $(PERL) ./run_make_tests.pl -make /usr/bin/gmake $(MAKETESTFLAGS); \
+	  else \
+	    echo "Can't find a working Perl ($(PERL)); the test suite requires Perl."; \
+	  fi; \
+	 else \
+	  echo "Can't find the GNU Make test suite ($(srcdir)/tests)."; \
+	 fi
+
 # --------------- Maintainer's Section
 
 # Tell automake that I haven't forgotten about this file and it will be