38571f2c94
Since commit ad502502 (cmMakefile: Track configured files so we can regenerate them, 2013-06-18) cmMakefile::ConfigureFile records the configured file as an output file generated by CMake. The intention is that for make and ninja we can re-run CMake when one of the files it generates goes missing. However, files configured temporarily in CMakeTmp directories by Check* modules do not live past the CMake invocation. We have to also track input files to the configure command. In theory the input to a configure command could it self be a file that is going to be deleted later (output from a custom command or configure_file).
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