1# 2# Copyright (C) 2012, 2016-2017 ARM Limited. All rights reserved. 3# 4# This program is free software and is provided to you under the terms of the GNU General Public License version 2 5# as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. 6# 7# A copy of the licence is included with the program, and can also be obtained from Free Software 8# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 9# 10 11# default to building for the host 12ARCH ?= $(shell uname -m) 13 14# linux build system integration 15 16ifneq ($(KERNELRELEASE),) 17# Inside the kernel build system 18 19EXTRA_CFLAGS += -I$(KBUILD_EXTMOD) 20 21SRC = umplock_driver.c 22 23MODULE:=umplock.ko 24 25obj-m := $(MODULE:.ko=.o) 26$(MODULE:.ko=-y) := $(SRC:.c=.o) 27 28$(MODULE:.ko=-objs) := $(SRC:.c=.o) 29 30else 31# Outside the kernel build system 32# 33# 34 35# Get any user defined KDIR-<names> or maybe even a hardcoded KDIR 36-include KDIR_CONFIGURATION 37 38# Define host system directory 39KDIR-$(shell uname -m):=/lib/modules/$(shell uname -r)/build 40 41ifeq ($(ARCH), arm) 42 # when compiling for ARM we're cross compiling 43 export CROSS_COMPILE ?= arm-none-linux-gnueabi- 44 CONFIG ?= arm 45else 46 # Compiling for the host 47 CONFIG ?= $(shell uname -m) 48endif 49 50# default cpu to select 51CPU ?= $(shell uname -m) 52 53# look up KDIR based om CPU selection 54KDIR ?= $(KDIR-$(CPU)) 55 56ifeq ($(KDIR),) 57$(error No KDIR found for platform $(CPU)) 58endif 59 60all: 61 $(MAKE) ARCH=$(ARCH) -C $(KDIR) M=$(CURDIR) 62 63kernelrelease: 64 $(MAKE) -C $(KDIR) kernelrelease 65 66clean: 67 $(MAKE) ARCH=$(ARCH) -C $(KDIR) M=$(CURDIR) clean 68 69endif 70