Lengthy "xmlto" build step in Cygwin.

[Hans-Bernhard Bröker]

Am 01.07.2016 um 20:36 schrieb Warren Young:

> That means you have the DocBook tools installed but don’t have the
> DocBook XSL stylesheets installed, so it has to fetch them over the
> Internet.  Those Internet servers are heavily overloaded because of
> all the *other* users with the same system misconfiguration you
> have.

Well, in all fairness it has to be pointed out that this 
mis-configuration was set up, or at least not actively prevented, by the 
packages involved.

Now the need for these packages _is_ actually mentioned somewhere:

winsup/doc/README:
=======================
ADDITIONAL BUILD REQUIREMENTS FOR DOCUMENTATION

dblatex
docbook-xml45
docbook-xsl
docbook2x-texi
gzip
texinfo
xmlto
=======================

But of these only docbox2x-texi is checked for by 
winsup/doc/configure.ac.  At least xmlto surely has to be checked for, 
too, don't you think?  And maybe it would be possible to add a check for 
the docbook-xml45 package (or equivalent) here, to at least output a 
warning.

Or, to turn this around: shouldn't one of these packages:

	xmlto
	dblatex
	docbook2x

formally require package docbook-xml45 (and possibly all the other 
docbook-* packages)?


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