| if("x${CMAKE_GENERATOR_INSTANCE}" STREQUAL "x") | |
| message(FATAL_ERROR "CMAKE_GENERATOR_INSTANCE is empty but should have a value.") | |
| elseif("x${CMAKE_GENERATOR_INSTANCE}" MATCHES [[\\]]) | |
| message(FATAL_ERROR | |
| "CMAKE_GENERATOR_INSTANCE is\n" | |
| " ${CMAKE_GENERATOR_INSTANCE}\n" | |
| "which contains a backslash.") | |
| elseif(NOT IS_DIRECTORY "${CMAKE_GENERATOR_INSTANCE}") | |
| message(FATAL_ERROR | |
| "CMAKE_GENERATOR_INSTANCE is\n" | |
| " ${CMAKE_GENERATOR_INSTANCE}\n" | |
| "which is not an existing directory.") | |
| endif() |