Updated darwin config for when X11 is not in the same location as we're installing to
diff --git a/configs/darwin b/configs/darwin
index c50ea9c..29fa0f1 100644
--- a/configs/darwin
+++ b/configs/darwin
@@ -6,6 +6,8 @@
 
 INSTALL_DIR = /usr/X11
 
+X11_DIR = $(INSTALL_DIR)
+
 # Compiler and flags
 CC = gcc
 CXX = gcc
@@ -21,9 +23,9 @@
 ARCH_FLAGS += $(RC_CFLAGS)
 
 CFLAGS =  -ggdb3 -Os -Wall -Wmissing-prototypes -std=c99 -ffast-math -fno-strict-aliasing \
-	-I$(INSTALL_DIR)/include $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(ASM_FLAGS) $(DEFINES)
+	-I$(INSTALL_DIR)/include -I$(X11_DIR)/include $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(ASM_FLAGS) $(DEFINES)
 CXXFLAGS =  -ggdb3 -Os -Wall -fno-strict-aliasing \
-	-I$(INSTALL_DIR)/include $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(ASM_FLAGS) $(DEFINES)
+	-I$(INSTALL_DIR)/include -I$(X11_DIR)/include $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(ASM_FLAGS) $(DEFINES)
 
 # Library names (actual file names)
 GL_LIB_NAME = libGL.dylib
@@ -39,12 +41,12 @@
 GLW_LIB_GLOB = libGLw.*dylib
 OSMESA_LIB_GLOB = libOSMesa.*dylib
 
-GL_LIB_DEPS = -L$(INSTALL_DIR)/$(LIB_DIR) -lX11 -lXext -lm -lpthread
+GL_LIB_DEPS = -L$(INSTALL_DIR)/$(LIB_DIR) -L$(X11_DIR)/$(LIB_DIR) -lX11 -lXext -lm -lpthread
 OSMESA_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GL_LIB)
 GLU_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GL_LIB)
-GLUT_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLU_LIB) -l$(GL_LIB)  -L$(INSTALL_DIR)/$(LIB_DIR) -lX11 -lXmu -lXi -lXext
-GLW_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GL_LIB) -L$(INSTALL_DIR)/$(LIB_DIR) -lX11 -lXt
-APP_LIB_DEPS = -L$(TOP)/lib -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) -L$(INSTALL_DIR)/$(LIB_DIR) -lX11 -lXmu -lXt -lXi -lm
+GLUT_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLU_LIB) -l$(GL_LIB)  -L$(INSTALL_DIR)/$(LIB_DIR) -L$(X11_DIR)/$(LIB_DIR) -lX11 -lXmu -lXi -lXext
+GLW_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GL_LIB) -L$(INSTALL_DIR)/$(LIB_DIR) -L$(X11_DIR)/$(LIB_DIR) -lX11 -lXt
+APP_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) -L$(INSTALL_DIR)/$(LIB_DIR) -L$(X11_DIR)/$(LIB_DIR) -lX11 -lXmu -lXt -lXi -lm
 
 # omit glw lib for now:
 SRC_DIRS = glx/x11 mesa glu glut/glx glew