lttng_check_linux_version = $(shell pwd)/include/linux/version.h
lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h
lttng_check_linux_version = $(shell pwd)/include/linux/version.h
lttng_check_generated_linux_version = $(shell pwd)/include/generated/uapi/linux/version.h