Apple: Some changes to fix compilation problems on OSX
diff --git a/configs/darwin b/configs/darwin
index c7f94d2..b8a32cb 100644
--- a/configs/darwin
+++ b/configs/darwin
@@ -11,8 +11,8 @@
 # Compiler and flags
 CC = gcc
 CXX = gcc
-CFLAGS = -I/usr/X11/include -O3 -fPIC -fno-common -ffast-math -funroll-loops -fexpensive-optimizations -no-cpp-precomp -dynamic -Ddarwin $(DEFINES)
-CXXFLAGS = -I/usr/X11/include -O3 -fPIC -fno-common -ffast-math -funroll-loops -fexpensive-optimizations -no-cpp-precomp -dynamic -Ddarwin $(DEFINES)
+CFLAGS = -I/usr/X11/include -O2 -no-cpp-precomp -dynamic $(DEFINES)
+CXXFLAGS = -I/usr/X11/include -O2 -no-cpp-precomp -dynamic $(DEFINES)
 
 CFLAGS += $(RC_CFLAGS)
 CXXFLAGS += $(RC_CFLAGS)
@@ -35,6 +35,8 @@
 GLW_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXt $(TOP)/lib/GL.dylib
 APP_LIB_DEPS = -L$(TOP)/lib -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) -L/usr/X11/lib -lX11 -lXmu -lXt -lXi -lm
 
+INSTALL_DIR = /usr/X11
+
 # omit glw lib for now:
-SRC_DIRS = glx/x11 glu glut/glx mesa
+SRC_DIRS = glx/x11 mesa glu glut/glx
 DRIVER_DIRS = osmesa