gallium-intel: Improve Xorg Makefile a bit

The real solution is to create a Makefile.template for xorg
	drivers and use that here.

src/gallium/winsys/drm/intel/xorg/Makefile

@@ -1,36 +1,38 @@
 TARGET     = modesetting_drv.so
 CFILES     = $(wildcard ./*.c)
 OBJECTS    = $(patsubst ./%.c,./%.o,$(CFILES))
-GALLIUMDIR = ../../../..
 TOP        = ../../../../../..
 
-include ${TOP}/configs/current
+include $(TOP)/configs/current
 
-CFLAGS = -DHAVE_CONFIG_H \
-         -g -Wall -Wimplicit-function-declaration -fPIC \
-         $(shell pkg-config --cflags pixman-1 xorg-server libdrm xproto) \
-	 -I../gem \
-         -I${GALLIUMDIR}/include \
-         -I${GALLIUMDIR}/drivers \
-         -I${GALLIUMDIR}/auxiliary \
-         -I${TOP}/src/mesa \
-         -I$(TOP)/include \
-         -I$(TOP)/src/egl/main
+INCLUDES = \
+	$(shell pkg-config --cflags-only-I pixman-1 xorg-server libdrm xproto) \
+	-I../gem \
+	-I$(TOP)/src/gallium/include \
+	-I$(TOP)/src/gallium/drivers \
+	-I$(TOP)/src/gallium/auxiliary \
+	-I$(TOP)/src/mesa \
+	-I$(TOP)/include \
+	-I$(TOP)/src/egl/main
 
 LIBS = \
-	$(GALLIUMDIR)/state_trackers/xorg/libxorgtracker.a \
-	$(GALLIUMDIR)/winsys/drm/intel/gem/libinteldrm.a \
+	$(TOP)/src/gallium/state_trackers/xorg/libxorgtracker.a \
+	$(TOP)/src/gallium/winsys/drm/intel/gem/libinteldrm.a \
 	$(TOP)/src/gallium/drivers/i915simple/libi915simple.a \
 	$(TOP)/src/gallium/drivers/softpipe/libsoftpipe.a \
 	$(GALLIUM_AUXILIARIES)
 
+DRIVER_DEFINES = \
+	-DHAVE_CONFIG_H
+
+
 #############################################
 
 
 
 all default: $(TARGET)
 
-$(TARGET): $(OBJECTS) Makefile $(GALLIUMDIR)/state_trackers/xorg/libxorgtracker.a $(LIBS)
+$(TARGET): $(OBJECTS) Makefile $(TOP)/src/gallium/state_trackers/xorg/libxorgtracker.a $(LIBS)
 	$(TOP)/bin/mklib -noprefix -o $@ \
 	$(OBJECTS) $(LIBS) $(shell pkg-config --libs libdrm) -ldrm_intel
 
@@ -41,4 +43,14 @@ install:
 	$(INSTALL) -d $(DESTDIR)/$(XORG_DRIVER_INSTALL_DIR)
 	$(MINSTALL) -m 755 $(TARGET) $(DESTDIR)/$(XORG_DRIVER_INSTALL_DIR)
 
+
+##############################################
+
+
+.c.o:
+	$(CC) -c $(CFLAGS) $(INCLUDES) $(DRIVER_DEFINES) $< -o $@
+
+
+##############################################
+
 .PHONY	= all clean install