--- /dev/null
+# Having a separate GNUmakefile lets me `include' the dynamically
+# generated rules created via Makefile.maint as well as Makefile.maint itself.
+# This makefile is used only if you run GNU Make.
+# It is necessary if you want to build targets usually of interest
+# only to the maintainer.
+
+# Systems where /bin/sh is not the default shell need this. The $(shell)
+# command below won't work with e.g. stock DOS/Windows shells.
+SHELL = /bin/sh
+
+have-Makefile := $(shell test -f Makefile && echo yes)
+
+# If the user runs GNU make but has not yet run ./configure,
+# give them a diagnostic.
+ifeq ($(have-Makefile),yes)
+
+include Makefile
+include $(srcdir)/Makefile.maint
+
+else
+
+all:
+ @echo There seems to be no Makefile in this directory.
+ @echo "You must run ./configure before running \`make'."
+ @exit 1
+
+endif
+
+pre-dist:
+ @cd docs && make gnuplot.texi
+ @cd config && rm -f Makefile.am && make -f Makefile.am.in Makefile.am
+ @cd demo && rm -f Makefile.am && make -f Makefile.am.in Makefile.am
+ @cd m4 && rm -f Makefile.am && make -f Makefile.am.in Makefile.am
+ @cd src && rm -f makefile.all && make -f Makefile.maint makefile.all
+ @cd term && rm -f Makefile.am && make -f Makefile.am.in Makefile.am
+ @cd tutorial && rm -f Makefile.am && make -f Makefile.am.in Makefile.am