How treat `include-what-you-use` warnings as errors with `cmake`

Question

Is it possible to treat include-what-you-use warnings as errors using cmake?

I am playing around with include-what-you-use trying to integrate it into our cmake build process. The desired behaviour is to stop the build process when include-what-you-use generates a report, then print a warning. Currently, the build continues.

The tool is integrated to the cmake build process thanks to:

find_program(IWYU NAMES include-what-you-use)
if(IWYU)
  message(STATUS "Using include-what-you-use")
  set(CMAKE_CXX_INCLUDE_WHAT_YOU_USE ${IWYU})
endif()

I also add the Werror flag to my cmake target.