Move construction of libOSMesa.so into src/mesa/drivers/osmesa/Makefile

This removes some cruft from src/mesa/Makefile.
Something similar could be done for stand-alone / Xlib-Mesa libGL...

src/mesa/Makefile

@@ -41,7 +41,7 @@ libglapi.a: $(GLAPI_OBJECTS)
 
 
 ######################################################################
-# Stand-alone Mesa libGL and libOSMesa
+# Stand-alone Mesa libGL
 STAND_ALONE_DRIVER_SOURCES = \
 	$(COMMON_DRIVER_SOURCES) \
 	$(X11_DRIVER_SOURCES)
@@ -52,17 +52,12 @@ STAND_ALONE_OBJECTS = \
 	$(CORE_OBJECTS) \
 	$(STAND_ALONE_DRIVER_OBJECTS)
 
-# For libOSMesa16 or libOSMesa32 we link _all_ the objects into the library,
-# not just the osmesa.o object (i.e. we don't have a libGL).
-OSMESA16_OBJECTS = \
-	$(CORE_OBJECTS) \
-	$(COMMON_DRIVER_OBJECTS) \
-	$(OSMESA_DRIVER_OBJECTS)
 
+stand-alone: depend subdirs $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME)
 
-stand-alone: depend subdirs $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME) $(TOP)/$(LIB_DIR)/$(OSMESA_LIB_NAME)
+osmesa-only: depend subdirs libmesa.a libglapi.a
+	cd drivers/osmesa && $(MAKE)
 
-osmesa-only: depend subdirs $(TOP)/$(LIB_DIR)/$(OSMESA_LIB_NAME)
 
 # Make the GL library
 $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME): $(STAND_ALONE_OBJECTS) $(PIPE_LIB) $(CELL_LIB) $(CELL_LIB_SPU)
@@ -73,25 +68,6 @@ $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME): $(STAND_ALONE_OBJECTS) $(PIPE_LIB) $(CELL_LIB)
 		$(MKLIB_OPTIONS) $(STAND_ALONE_OBJECTS) \
 		$(PIPE_LIB) $(CELL_LIB) $(CELL_LIB_SPU) $(GL_LIB_DEPS)
 
-# Make the OSMesa library
-$(TOP)/$(LIB_DIR)/$(OSMESA_LIB_NAME): $(OSMESA_DRIVER_OBJECTS) \
-		$(OSMESA16_OBJECTS) $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME)
-	@ if [ "${DRIVER_DIRS}" = "osmesa" ] ; then \
-		$(TOP)/bin/mklib -o $(OSMESA_LIB) \
-			-linker "$(CC)" \
-			-major $(MESA_MAJOR) \
-			-minor $(MESA_MINOR) -patch $(MESA_TINY) \
-			-install $(TOP)/$(LIB_DIR) $(MKLIB_OPTIONS) \
-			$(OSMESA_LIB_DEPS) $(OSMESA16_OBJECTS) ; \
-	else \
-		$(TOP)/bin/mklib -o $(OSMESA_LIB) \
-			-linker "$(CC)" \
-			-major $(MESA_MAJOR) \
-			-minor $(MESA_MINOR) -patch $(GL_TINY) \
-			-install $(TOP)/$(LIB_DIR) $(MKLIB_OPTIONS) \
-			$(OSMESA_LIB_DEPS) $(OSMESA_DRIVER_OBJECTS) ; \
-	fi
-
 
 ######################################################################
 # Generic stuff

src/mesa/drivers/osmesa/Makefile

@@ -0,0 +1,74 @@
+# src/mesa/drivers/osmesa/Makefile for libOSMesa.so
+
+# Note that we may generate libOSMesa.so or libOSMesa16.so or libOSMesa32.so
+# with this Makefile
+
+
+TOP = ../../../..
+
+include $(TOP)/configs/current
+
+
+
+SOURCES = osmesa.c
+
+OBJECTS = $(SOURCES:.c=.o)
+
+INCLUDE_DIRS = \
+	-I$(TOP)/include \
+	-I$(TOP)/src/mesa \
+	-I$(TOP)/src/mesa/main
+
+CORE_MESA = $(TOP)/src/mesa/libmesa.a $(TOP)/src/mesa/libglapi.a
+
+
+.PHONY: osmesa8
+.PHONY: osmesa16
+
+
+.c.o:
+	$(CC) -c $(INCLUDE_DIRS) $(CFLAGS) $< -o $@
+
+
+default:
+# $(TOP)/$(LIB_DIR)/$(OSMESA_LIB_NAME)
+	@ if [ "${DRIVER_DIRS}" = "osmesa" ] ; then \
+		$(MAKE) osmesa16 ; \
+	else \
+		$(MAKE) osmesa8 ; \
+	fi
+
+
+
+
+# The normal libOSMesa is used in conjuction with libGL
+osmesa8: $(TOP)/lib/$(OSMESA_LIB_NAME)
+
+$(TOP)/lib/$(OSMESA_LIB_NAME): $(OBJECTS)
+	$(TOP)/bin/mklib -o $(OSMESA_LIB) \
+		-linker "$(CC)" \
+		-major $(MESA_MAJOR) -minor $(MESA_MINOR) -patch $(MESA_TINY) \
+		-install $(TOP)/$(LIB_DIR) \
+		$(MKLIB_OPTIONS) \
+		$(OSMESA_LIB_DEPS) $(OBJECTS)
+
+
+
+
+# The libOSMesa16/libOSMesa32 libraries do not use libGL but rather are built
+# with all the other Mesa sources (compiled with -DCHAN_BITS=16/32
+osmesa16: $(OBJECTS) $(CORE_MESA)
+	$(TOP)/bin/mklib -o $(OSMESA_LIB) \
+		-linker "$(CC)" \
+		-major $(MESA_MAJOR) -minor $(MESA_MINOR) -patch $(MESA_TINY) \
+		-install $(TOP)/$(LIB_DIR) \
+		$(MKLIB_OPTIONS) \
+		$(OSMESA_LIB_DEPS) $(OBJECTS) $(CORE_MESA)
+
+
+
+clean:
+	-rm -f *.o *~
+
+
+# XXX todo install rule?