Apple: Some changes to fix compilation problems on OSX

configs/darwin

@@ -11,8 +11,8 @@ DEFINES = -D_DARWIN_C_SOURCE -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L \
 # 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 += $(RC_CFLAGS)
@@ -35,6 +35,8 @@ GLUT_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -lGL -lGLU -L/usr/X11R6/lib -lX11 -lXmu -lXi
 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

include/GL/internal/dri_interface.h

@@ -40,7 +40,14 @@
 #ifndef DRI_INTERFACE_H
 #define DRI_INTERFACE_H
 
+/* Make this something other than __APPLE__ for other arcs with no drm.h */
+#ifndef __APPLE__
 #include <drm.h>
+#else
+typedef unsigned int drm_context_t;
+typedef unsigned int drm_drawable_t;
+typedef struct drm_clip_rect drm_clip_rect_t;
+#endif
 
 /**
  * \name DRI interface structures