#
#  Unless you and Broadcom execute a separate written software license
#  agreement governing use of this software, this software is licensed to
#  you under the terms of the GNU General Public License version 2 (the
#  "GPL"), available at http://www.broadcom.com/licenses/GPLv2.php,
#  with the following added to such license:
#  
#  As a special exception, the copyright holders of this software give
#  you permission to link this software with independent modules, and to
#  copy and distribute the resulting executable under terms of your
#  choice, provided that you also meet, for each linked independent
#  module, the terms and conditions of the license of that module.  An
#  independent module is a module which is not derived from this
#  software.  The special exception does not apply to any modifications
#  of the software.
#
# $Id: Makefile.linux-kmodule-3_6,v 1.2 Broadcom SDK $
# $Copyright: (c) 2006 Broadcom Corp.
# All Rights Reserved.$

# Due to the extensive use of driver libraries, the SDK usually builds
# kernel modules from a precompiled object. To avoid various warnings
# and conflicts, the pre-compiled object must be named differently
# from the target module, and the object file itself should be
# appended with "_shipped".

# If a module exports any symbols, then the exporting source file must
# be compiled within the kernel source tree for correct generation of
# module symbol versions. The symbol source file should be passed to
# this Makefile via the MODULE_SYM variable.

MODULE := $(MOD_NAME).o
KMODULE := $(MOD_NAME).ko
PRE_COMPILED_OBJ := obj_$(MOD_NAME).o

obj-m := $(MODULE)
$(MOD_NAME)-y := $(MODULE_SYM) $(PRE_COMPILED_OBJ)


ifeq (,$(CROSS_COMPILE))

export CROSS_COMPILE

endif

SAVE_CFLAGS := ${CFLAGS}

include $(SDK)/make/Make.config

PWD := $(shell pwd)

ifneq ($(ARCH),)
# ELDK does not seem to `automatically' define ARCH where other gccs may
A := ARCH=$(ARCH)
export ARCH
endif

# Provide an option in case kernel was built in separate directory
KERNBLDDIR ?= $(KERNDIR)

# Standard SDK include path for building source files that export
# kernel symbols.

override EXTRA_CFLAGS = -I${SDK}/include -I${SDK}/systems/linux/kernel/modules/include -I${SDK}/systems/bde/linux/include

# The precopiled object needs a dummy command file to avoid warnings
# from the Kbuild scripts (modpost stage).
# Kernels before 2.6.17 do not support external module symbols files,
# so we create a dummy to prevent build failures.
	
$(KMODULE):
	rm -f *.o *.ko .*.cmd
	rm -fr .tmp_versions
	ln -s $(LIBDIR)/$(MODULE) $(PRE_COMPILED_OBJ)_shipped
	echo "suppress warning" > .$(PRE_COMPILED_OBJ).cmd
	$(MAKE) -C $(KERNBLDDIR) CROSS_COMPILE=$(CROSS_COMPILE) M=$(PWD) modules
	if [ ! -f Module.symvers ]; then echo "old kernel (pre-2.6.17)" > Module.symvers; fi
	cp -f $(KMODULE) $(LIBDIR)
	rm -f $(PRE_COMPILED_OBJ)_shipped

EXTRA_CFLAGS = $(CFLAGS)
CFLAGS := ${SAVE_CFLAGS}