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From: Chris Brannon <chris@the-brannons.com>
To: Adam Thompson <arthompson1990@gmail.com>
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Date: Sat, 19 Dec 2015 04:58:15 -0800
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 Thompson's message of "Sat, 19 Dec 2015 12:37:43 +0000")
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Subject: Re: [Edbrowse-dev] edbrowse and edbrowse-js not communicating
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Adam Thompson <arthompson1990@gmail.com> writes:

> Ok, that makes sense, though I'm surprised we can't check at configure time if
> the version of tidy defines the symbols (and macros) we expect.


Sure, we can check for symbols.  If the library defines
tidyLibraryVersion, it is tidy-html5.  If it doesn't, then it's some ancient
version of tidy, so throw up our hands and refuse to proceed.
What we won't know  without building and running an executable is the
version number of tidy-html5.
Really, we don't know the actual version until runtime.  I can build a
program under version 5.1.x and then run it under 5.1.y, just fine,
assuming the public API hasn't changed between x and y.
Hence we should probably do both a compile-time and run-time check.
Compile-time tells us whether we have tidy-html5 or tidy, run0-time
tells us more specifically which version of tidy-html5 we have.

-- Chris