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# Add rules to check the generated executable works.
set(hello_output "${CMAKE_CURRENT_BINARY_DIR}/hello.output")
add_custom_command(
OUTPUT "${hello_output}"
COMMAND "$<TARGET_FILE:hello>" > "${hello_output}"
DEPENDS hello
VERBATIM
)
if(NOT DEFINED HELLO_OUTPUT_STRING)
set(HELLO_OUTPUT_STRING "Hello world!\n")
endif()
set(hello_output_ref "${CMAKE_CURRENT_BINARY_DIR}/hello.output.ref")
file(WRITE "${hello_output_ref}" "${HELLO_OUTPUT_STRING}")
add_custom_target(check_output ALL
COMMAND "${CMAKE_COMMAND}" -E compare_files
"${hello_output}" "${hello_output_ref}"
DEPENDS "${hello_output}" "${hello_output_ref}"
VERBATIM
)
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