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add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/copied_file.c" COMMAND "${CMAKE_COMMAND}" -E copy "${CMAKE_CURRENT_SOURCE_DIR}/empty.c" "${CMAKE_CURRENT_BINARY_DIR}/copied_file$<Fortran_COMPILER_ID>.c" ) add_custom_target(drive DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/copied_file.c")