Suppose I want to rebuild a C file to update a time stamp in the final exe but I only want to do this when the exe needs to be updated. Any high level rules that allow me to do this? I saw a hack in 2007:

http://thread.gmane.org/gmane.comp.lib.boost.build/16099/focus=16139

but it does not seem to accomplish what I need.

Thanks,

Chris

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