--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -65,7 +65,8 @@
 DLD_XSRC := amd.cc balance.cc besselj.cc betainc.cc bsxfun.cc cellfun.cc \
 	chol.cc ccolamd.cc colamd.cc colloc.cc conv2.cc convhulln.cc daspk.cc \
 	dasrt.cc dassl.cc det.cc dispatch.cc dlmread.cc dmperm.cc eig.cc \
-	expm.cc fft.cc fft2.cc fftn.cc fftw.cc filter.cc find.cc fsolve.cc \
+	expm.cc fft.cc fft2.cc fftn.cc fftw.cc filter.cc find.cc \
+	fltk_backend.cc fsolve.cc \
 	gammainc.cc gcd.cc getgrent.cc getpwent.cc getrusage.cc \
 	givens.cc hess.cc hex2num.cc inv.cc kron.cc lookup.cc lsode.cc \
 	lu.cc luinc.cc matrix_type.cc max.cc md5sum.cc pinv.cc qr.cc \
@@ -117,8 +118,8 @@
 
 INCLUDES := Cell.h base-list.h builtins.h c-file-ptr-stream.h \
 	comment-list.h debug.h defun-dld.h defun-int.h defun.h \
-	dirfns.h dynamic-ld.h error.h file-io.h gripes.h help.h \
-	input.h lex.h load-path.h load-save.h ls-hdf5.h \
+	dirfns.h dynamic-ld.h error.h file-io.h gl-render.h \
+	gripes.h help.h input.h lex.h load-path.h load-save.h ls-hdf5.h \
 	ls-mat-ascii.h ls-mat4.h ls-mat5.h ls-oct-ascii.h \
 	ls-oct-binary.h ls-utils.h mex.h mexproto.h oct-errno.h \
 	oct-fstrm.h oct-hist.h oct-iostrm.h oct-map.h oct-obj.h \
@@ -196,9 +197,9 @@
 
 DIST_SRC := Cell.cc bitfcns.cc c-file-ptr-stream.cc comment-list.cc \
 	cutils.c data.cc debug.cc defaults.cc defun.cc dirfns.cc \
-	dynamic-ld.cc error.cc file-io.cc graphics.cc gripes.cc \
-	help.cc input.cc lex.l load-path.cc load-save.cc ls-hdf5.cc \
-	ls-mat-ascii.cc ls-mat4.cc ls-mat5.cc ls-oct-ascii.cc \
+	dynamic-ld.cc error.cc file-io.cc gl-render.cc graphics.cc \
+	gripes.cc help.cc input.cc lex.l load-path.cc load-save.cc \
+	ls-hdf5.cc ls-mat-ascii.cc ls-mat4.cc ls-mat5.cc ls-oct-ascii.cc \
 	ls-oct-binary.cc ls-utils.cc main.c mappers.cc matherr.c \
 	mex.cc oct-fstrm.cc oct-hist.cc oct-iostrm.cc oct-map.cc \
 	oct-obj.cc oct-prcstrm.cc oct-procbuf.cc oct-stream.cc \
@@ -348,7 +349,7 @@
 	$(OCTAVE_LIBS) \
 	$(LEXLIB) $(UMFPACK_LIBS) $(AMD_LIBS) $(CAMD_LIBS) $(COLAMD_LIBS) \
 	$(CHOLMOD_LIBS) $(CCOLAMD_LIBS) $(CXSPARSE_LIBS) $(BLAS_LIBS) \
-	$(FFTW_LIBS) $(LIBS) $(FLIBS)
+	$(FFTW_LIBS) $(OPENGL_LIBS) $(LIBS) $(FLIBS)
 
 stmp-pic: pic
 	@if [ -f stmp-pic ]; then \
@@ -633,6 +634,8 @@
 	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(CURL_LIBS)
     __glpk__.oct : pic/__glpk__.o octave$(EXEEXT)
 	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(GLPK_LIBS)
+    fltk_backend.oct : pic/fltk_backend.o octave$(EXEEXT)
+	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(GRAPHICS_LIBS) $(FT2_LIBS)
   else
     convhulln.oct : convhulln.o octave$(EXEEXT)
 	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(QHULL_LIBS)
@@ -646,6 +649,8 @@
 	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(CURL_LIBS)
     __glpk__.oct : __glpk__.o octave$(EXEEXT)
 	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(GLPK_LIBS)
+    fltk_backend.oct : fltk_backend.o octave$(EXEEXT)
+	  $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(GRAPHICS_LIBS) $(FT2_LIBS)
   endif
 endif