voj has asked for the wisdom of the Perl Monks concerning the following question:
In ExtUtils::MakeMaker you specify required modules in PREREQ_PM. I have a module that recommends the GraphViz module but it can also be installed without. Can I somehow add a rule to Makefile.PL that triggers an attempt to install GraphViz? So if you have already installed the graphviz binary (which is needed by GraphViz module), installation of my module should also install GraphViz. But if this fails, because of missing graphviz binary, you should only get a message.
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