execute_process(COMMAND git describe --tags --always --dirty WORKING_DIRECTORY ${SRC}
                OUTPUT_VARIABLE V OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
if(NOT V)
  set(V "0.0.0-dev")
endif()
string(REGEX REPLACE "^v" "" V "${V}")
string(SUBSTRING "${V}" 0 15 V)
set(CONTENT "#define NINLIGHT_FW_VERSION \"${V}\"\n")
if(EXISTS ${OUT})
  file(READ ${OUT} OLD)
else()
  set(OLD "")
endif()
if(NOT OLD STREQUAL CONTENT)
  file(WRITE ${OUT} "${CONTENT}")
endif()