#
# VirtualBox Guest Additions kernel module Makefile, common parts.
#
# See Makefile.include.header for details of how to use this.
#
# Copyright (C) 2006-2015 Oracle Corporation
#
# This file is part of VirtualBox Open Source Edition (OSE), as
# available from http://www.virtualbox.org. This file is free software;
# you can redistribute it and/or modify it under the terms of the GNU
# General Public License (GPL) as published by the Free Software
# Foundation, in version 2 as it comes in the "COPYING" file of the
# VirtualBox OSE distribution. VirtualBox OSE is distributed in the
# hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
#

# override is required by the Debian guys
override MODULE = $(MOD_NAME)
OBJS   = $(MOD_OBJS)

ifneq ($(MAKECMDGOALS),clean)

KBUILD_VERBOSE ?= 1

#
# Compiler options
#
ifndef INCL
 INCL    := $(addprefix -I,$(KERN_INCL) $(EXTRA_INCL))
 ifndef KBUILD_EXTMOD
  KBUILD_EXTMOD := $(shell pwd)
 endif
 INCL    += $(MOD_INCL)
 export INCL
endif
KFLAGS   := -D__KERNEL__ -DMODULE $(MOD_DEFS)
ifeq ($(BUILD_TYPE),debug)
 KFLAGS  += -DDEBUG -DDEBUG_$(subst $(subst _, ,_),_,$(USERNAME)) -DDEBUG_USERNAME=$(subst $(subst _, ,_),_,$(USERNAME))
endif

ifeq ($(KERN_VERSION), 24)
#
# 2.4
#

ifeq ($(BUILD_TARGET_ARCH),amd64)
 KFLAGS  += -mcmodel=kernel
endif

CFLAGS := -O2 -DVBOX_LINUX_2_4 $(MOD_CFLAGS) $(INCL) $(KFLAGS) $(MOD_EXTRA) $(KDEBUG)
MODULE_EXT := o

# 2.4 Module linking
$(MODULE).o: $(OBJS)
	$(LD) -o $@ -r $(OBJS)

.PHONY: $(MODULE)
all: $(MODULE)
$(MODULE): $(MODULE).o

else
#
# 2.6 and later
#

MODULE_EXT := ko

$(MODULE)-y  := $(OBJS)

# build defs
EXTRA_CFLAGS += $(MOD_CFLAGS) $(INCL) $(KFLAGS) $(MOD_EXTRA) $(KDEBUG)

all: $(MODULE)

obj-m += $(MODULE).o

JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
ifeq ($(JOBS),0)
  JOBS := 1
endif

# OL/UEK: disable module signing for external modules -- we don't have any private key
$(MODULE):
	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) CONFIG_MODULE_SIG= -C $(KERN_DIR) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) -j$(JOBS) modules

modules_install:
	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) CONFIG_MODULE_SIG= -C $(KERN_DIR) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) modules_install

endif

install: $(MODULE)
	@mkdir -p $(MODULE_DIR); \
	install -m 0644 -o root -g root $(MODULE).$(MODULE_EXT) $(MODULE_DIR); \
	PATH="$(PATH):/bin:/sbin" depmod -a;

endif # eq($(MAKECMDGOALS),clean)

clean:
	for f in $(MOD_CLEAN); do rm -f $$f/*.o $$f/.*.cmd $$f/.*.flags; done
	rm -rf .$(MOD_NAME)* .tmp_ver* $(MOD_NAME).* Modules.symvers modules.order