- message (STATUS "${Blue}-- Check kernel_minimal_version (found kernel version ${CMAKE_SYSTEM_VERSION})${ColourReset}")
- if (CMAKE_SYSTEM_VERSION VERSION_LESS ${kernel_minimal_version})
- message(FATAL_ERROR "${Red}**** FATAL: Require at least ${kernel_minimal_version} please use a recent kernel.")
-endif()
+ if(DEFINED ENV{SDKTARGETSYSROOT})
+ file(STRINGS $ENV{SDKTARGETSYSROOT}/usr/include/linux/version.h LINUX_VERSION_CODE_LINE REGEX "LINUX_VERSION_CODE")
+ else()
+ file(STRINGS /usr/include/linux/version.h LINUX_VERSION_CODE_LINE REGEX "LINUX_VERSION_CODE")
+ endif()
+
+ string(REGEX MATCH "[0-9]+" LINUX_VERSION_CODE ${LINUX_VERSION_CODE_LINE})
+ math(EXPR a "${LINUX_VERSION_CODE} >> 16")
+ math(EXPR b "(${LINUX_VERSION_CODE} >> 8) & 255")
+ math(EXPR c "(${LINUX_VERSION_CODE} & 255)")
+
+ set(KERNEL_VERSION "${a}.${b}.${c}")
+ message (STATUS "${Cyan}-- Check kernel_minimal_version (found kernel version ${KERNEL_VERSION})${ColourReset}")
+
+ if (KERNEL_VERSION VERSION_LESS ${kernel_minimal_version})
+ message(FATAL_ERROR "${Red}**** FATAL: Require at least ${kernel_minimal_version} please use a recent kernel or source your SDK environment then clean and reconfigure your CMake project.")
+ endif (KERNEL_VERSION VERSION_LESS ${kernel_minimal_version})