ENABLE_MCOVERLAYFS=@ENABLE_MCOVERLAYFS@

RELEASE=$(shell uname -r)
MAJOR=$(shell echo ${RELEASE} | sed -e 's/^\([0-9]*\).*/\1/')
MINOR=$(shell echo ${RELEASE} | sed -e 's/^[0-9]*.\([0-9]*\).*/\1/')
PATCH=$(shell echo ${RELEASE} | sed -e 's/^[0-9]*.[0-9]*.\([0-9]*\).*/\1/')
LINUX_VERSION_CODE=$(shell expr \( ${MAJOR} \* 65536 \) + \( ${MINOR} \* 256 \) + ${PATCH})
RHEL_RELEASE_TMP=$(shell echo ${RELEASE} | sed -e 's/^[0-9]*.[0-9]*.[0-9]*-\([0-9]*\).*/\1/')
RHEL_RELEASE=$(shell if [ "${RELEASE}" == "${RHEL_RELEASE_TMP}" ]; then echo ""; else echo ${RHEL_RELEASE_TMP}; fi)
BUILD_MODULE_TMP=$(shell if [ "${RHEL_RELEASE}" == "" ]; then echo "org"; else echo "rhel"; fi)
BUILD_MODULE=none
ifeq ($(ENABLE_MCOVERLAYFS),yes)
ifeq ($(BUILD_MODULE_TMP),org)
ifeq ($(BUILD_MODULE),none)
BUILD_MODULE=$(shell if [ ${LINUX_VERSION_CODE} -ge 262144 -a ${LINUX_VERSION_CODE} -lt 262400 ]; then echo "linux-4.0.9"; else echo "none"; fi)
endif
ifeq ($(BUILD_MODULE),none)
BUILD_MODULE=$(shell if [ ${LINUX_VERSION_CODE} -ge 243680 -a ${LINUX_VERSION_CODE} -lt 263936 ]; then echo "linux-4.6.7"; else echo "none"; fi)
endif
endif
ifeq ($(BUILD_MODULE_TMP),rhel)
ifeq ($(BUILD_MODULE),none)
BUILD_MODULE=$(shell if [ ${LINUX_VERSION_CODE} -eq 199168 -a ${RHEL_RELEASE} -eq 327 ]; then echo "linux-3.10.0-327.36.1.el7"; else echo "none"; fi)
endif
endif
endif

.PHONY: clean install modules

modules:
ifneq ($(BUILD_MODULE),none)
	@(cd $(BUILD_MODULE); make modules)
endif

clean:
	@(cd linux-3.10.0-327.36.1.el7; make clean)
	@(cd linux-4.0.9; make clean)
	@(cd linux-4.6.7; make clean)

install:
ifneq ($(BUILD_MODULE),none)
	@(cd $(BUILD_MODULE); make install)
endif