diff --git a/Makefile b/Makefile
index 84add82..d3c0dd5 100755
--- a/Makefile
+++ b/Makefile
@@ -10,16 +10,15 @@ FRAMEWORKS += -framework AGL
 FRAMEWORKS += -framework Carbon
 
 LINKFLAGS += -L vecmath/lib/ -lvecmath
+LINKFLAGS += -lfltk -lfltk_gl
 else
 INCFLAGS = -I /usr/include/GL
 INCFLAGS += -I /mit/6.837/public/include/vecmath
 
-LINKFLAGS = -lglut -lGL -lGLU
+LINKFLAGS = -lglut $(shell fltk-config --use-gl --ldflags)
 LINKFLAGS += -L /mit/6.837/public/lib -lvecmath
 endif
 
-LINKFLAGS += -lfltk -lfltk_gl
-
 CFLAGS    = -g
 CFLAGS    += -DSOLN
 CC        = g++
diff --git a/vecmath b/vecmath
index 0b074cb..b79bde6 160000
--- a/vecmath
+++ b/vecmath
@@ -1 +1 @@
-Subproject commit 0b074cb47503c6c216fcd4b4b214e7c04e6804c4
+Subproject commit b79bde621ddcd6e2acf611286256521af39a33e6