--- Makefile.old	2011-06-22 06:30:52.441788160 +0200
+++ Makefile	2011-06-22 06:31:59.754087534 +0200
@@ -138,7 +138,7 @@
 endif
 
 ALL_LIBS := $(SDL_LIBS) $(BASE_LIBS) $(TILT_LIBS) $(INTL_LIBS) -lSDL_ttf \
-    -lvorbisfile $(OGL_LIBS)
+    -lvorbisfile $(OGL_LIBS) -lX11
 
 #------------------------------------------------------------------------------
 
--- Makefile.old	2012-01-18 21:28:23.000000000 -0500
+++ Makefile	2012-01-18 21:28:55.000000000 -0500
@@ -131,7 +131,7 @@
     OGL_LIBS  := -framework OpenGL
 endif
 
-BASE_LIBS := -ljpeg $(PNG_LIBS) $(FS_LIBS)
+BASE_LIBS := -ljpeg $(PNG_LIBS) $(FS_LIBS) -lm
 
 ifdef DARWIN
     BASE_LIBS += -L/opt/local/lib