#
# Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer,
#    without modification.
# 2. Redistributions in binary form must reproduce at minimum a disclaimer
#    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
#    redistribution must be conditioned upon including a substantially
#    similar Disclaimer requirement for further binary redistribution.
# 3. Neither the names of the above-listed copyright holders nor the names
#    of any contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# Alternatively, this software may be distributed under the terms of the
# GNU General Public License ("GPL") version 2 as published by the Free
# Software Foundation.
#
# NO WARRANTY
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
# AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
# THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGES.
#
# $Id: //depot/sw/linuxsrc/src/802_11/madwifi/madwifi/Makefile.inc#11 $
#

ifeq ($(obj),)
obj=	.
endif

# other locales sometimes cause trouble
export LC_ALL = POSIX

# OS is the target operating system. Currently only Linux is supported.
OS=		linux

# TOOLPREFIX is a string that is prepended to all toolchain executables,
# such as gcc, ld, as, objcopy etc.  This is used for cross-compiling.
# Default is native compilation.  You can define CROSS_COMPILE instead -
# it's a more traditional name.
TOOLPREFIX ?= $(CROSS_COMPILE)

# BUS defines the bus type to which the wireless devices is attached.
# Currently, the valid BUS types are PCI and AHB.  If BUS is not
# defined, then, we assume the bus type is PCI
ifndef BUS
BUS=		PCI
endif

# DESTDIR is used as path prefix during installation.
DESTDIR ?=

# KERNELPATH is the path to the Linux kernel build tree.  Unless a
# separate build directory was used for the kernel build, it's the same
# as the kernel source tree.  KERNELPATH is used to access the kernel
# configuration, include files and the build system.  To build for
# another kernel, set KERNELPATH manually, for example with:
# make KERNELPATH=/path/to/kernel/source

# TOOLPATH is the path which contains the crosscompile toolchain (?)

ifeq ($(strip ${BUS}),AHB)
# Bus type AHB forces the target platform to be mipsisa32.
TARGET :=	mipsisa32-be-elf

# Bus type AHB requires KERNELPATH and TOOLPATH to be set manually.
ifndef KERNELPATH
$(error KERNELPATH must be defined for bus type AHB.)
endif
ifndef TOOLPATH
$(error TOOLPATH must be defined for bus type AHB.)
endif

else

# The default KERNELPATH points to the directory where the currently
# running kernel was compiled.  Note that the configuration and the
# version of the kernel tree might have changed since then.
ifeq ($(wildcard $(KERNELPATH)),)
KERNELPATH = /lib/modules/$(shell uname -r)/build
# sanity check: does KERNELPATH exist?
ifeq ($(shell cd $(KERNELPATH) && pwd),)
$(error $(KERNELPATH) is missing, please set KERNELPATH)
endif
export KERNELPATH
endif

endif

# KERNELRELEASE is the target kernel's version.  It's always taken from
# the kernel build tree.  Kernel Makefile doesn't always know the exact
# kernel version (especially for vendor stock kernels), so we get it
# from <linux/version.h> instead. But simply grepping it from version.h
# doesn't work, since some distributions have multiple UTS_RELEASE
# in that file.
# This trick has been inspired by the lm_sensors project.
ifndef KERNELRELEASE
KERNELRELEASE := $(shell $(CC) -I $(KERNELPATH)/include -E $(DEPTH)/kernelversion.c | grep uts_release | cut -f2 -d'"')
endif

# KERNELCONF is the name of the file that holds the configuration
# of the target kernel.
KERNELCONF ?=	${KERNELPATH}/.config

# sanity check: does KERNELCONF exist?
ifeq ($(wildcard $(KERNELCONF)),)
$(error KERNELCONF: $(KERNELCONF) does not exist.)
endif

# Determine target architecture of the kernel.
ifeq (,$(ARCH_TARGET))
ARCH_TARGET=$(shell ${DEPTH}/scripts/get_arch_target.sh $(KERNELCONF))
ARCH ?= $(word 1,$(ARCH_TARGET))
TARGET ?= $(word 2,$(ARCH_TARGET))
endif

ifeq (,$(ARCH))
$(error Cannot determine kernel architecture, please set ARCH)
endif
export ARCH
export TARGET
export ARCH_TARGET

# SYSTEMMAP is the name of the System.map file for the target
# kernel. This will be needed when DESTDIR is defined in order
# to run depmod properly.
SYSTEMMAP ?= 	${KERNELPATH}/System.map

# MODULEPATH nominates the directory where the modules will be
# installed to
ifeq ($(strip ${BUS}),AHB)
MODULEPATH := 	${KERNELPATH}/arch/mips/ar531x/RAMDISK/rootdir/lib/modules/${KERNELRELEASE}/net
else
MODULEPATH ?=	/lib/modules/${KERNELRELEASE}/net
endif

# Recognize 2.4.x kernels to support the old build system
ifeq ($(filter-out 2.4%,$(KERNELRELEASE)),)
LINUX24 = y
endif

ifndef LINUX24
KMODSUF		:= ko
else
export-objs	= $(foreach m, $(obj-m), $($(m:.o=-objs)))
list-multi	= $(obj-m)
KMODSUF		:= o
endif

NM=		nm
AWK=		awk

#
# Path to the HAL source code.
#
ifeq ($(HAL),)
HAL=	${obj}/${DEPTH}/hal
endif
#
# Path to the HAL build area.
#
ATH_HAL=${DEPTH}/ath_hal
#
# Path to the 802.11 include files.
#
WLAN=	${DEPTH}/net80211
#
# Path to the Atheros device driver.
#
ATH=	${DEPTH}/ath
#
# Path to the rate control algorithm.
#
ifeq ($(ATH_RATE),)
ATH_RATE=	ath_rate/sample
endif
#
# Path to the userspace utilities. 
# 
TOOLS=  ${DEPTH}/tools 

COPTS+=	-Werror
INCS=	-include ${obj}/${DEPTH}/include/compat.h -I${obj}/${DEPTH}/include

ifeq ($(strip ${BUS}),AHB)
INCS+= -isystem ${TOOLPATH}/include
endif

# TARGET defines the target platform architecture. It must match one of
# the target platforms supported by the HAL. The default target is the
# host machine architecture. You can override TARGET on the make command
# line or in the environment. See hal/linux/*.inc for the list of
# supported targets.
ifeq (,$(wildcard ${HAL}/public/${TARGET}.inc))
TARGETS=$(basename $(notdir $(wildcard ${HAL}/public/*.inc)))
$(error TARGET $(TARGET) is invalid, valid targets are: $(TARGETS))
endif

include ${HAL}/public/${TARGET}.inc
include ${obj}/${DEPTH}/BuildCaps.inc

SYMBOLSDIR=${DEPTH}/symbols