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# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2020 Manuel Bentele <development@manuel-bentele.de>
#
# get Linux kernel version from KERNEL_BUILD_DIR string
macro(get_kernel_version LINUX_KERNEL_VERSION KERNEL_BUILD_DIR)
string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" LINUX_KERNEL_VERSION ${KERNEL_BUILD_DIR})
if(LINUX_KERNEL_VERSION STREQUAL "")
set(LINUX_KERNEL_VERSION "unknown")
endif(LINUX_KERNEL_VERSION STREQUAL "")
endmacro(get_kernel_version LINUX_KERNEL_VERSION KERNEL_BUILD_DIR)
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