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Subject: Re: Standard LEX variable doesn't work in Make.
To: cygwin AT cygwin DOT com
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Date: Sat, 26 Nov 2016 01:08:02 +0100
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Am 25.11.2016 um 15:31 schrieb Brian Inglis:

> One solution, and the most common in Cygwin, is the package flex should
> create a symlink lex if no such symlink or exe exists;

In this case I believe that would be less than fully correct, because 
flex is not a clean drop-in replacement for generic lex.  For that one 
has to add the '-l' flag. So instead of a symlink one would use a 
wrapper script much like the 'yacc' script found in the 'bison' package, 
i.e.:

	#! /bin/sh
	exec /usr/bin/flex -l "$@"

 > or by the FHS,
> create a group of alternatives, with a slave alternative for each of
> its public components e.g. bin, man, info, etc. files.

I don't think 'alternatives' is applicable here.  We're not looking at 
several packages providing the same file --- we're looking at

* single packages offering the same executable under more than one name, 
causing it to express different personalities, like ex -> vi.exe, view 
-> vi.exe, latex --> pdftex.exe,

* a subsystem like texlive installing a truckload of executable scripts 
somewhere else, and links from /bin to them.

So while I agree that the 'alternatives' mechanism could, or even should 
be used more in Cygwin, I don't think this is one of the cases where 
that applies.


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