Well, after a crash course in perl I hacked together something to parse the text files and create mbox format, which I then managed to import into Evolution. So now I have recovered email from my early days at Bullfrog (95-96). Still working on the .pst which isn't readable by readpst. Maybe I'll have to take it to work to open with Outlook and re-export.
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More wikihowery
Especially for . How to Find Headers and Libraries for C/C++ Pograms Using pkg-config.