[ANNOUNCEMENT] texinfo 6.8

[Jon Turney]

On 05/07/2021 19:04, Ken Brown via Cygwin-announce via Cygwin wrote:
> The following packages have been uploaded to the Cygwin distribution:
> 
> * texinfo-6.8-1
> * texinfo-tex-6.8-1
> * info-6.8-1
> 
> Texinfo is a documentation system that uses a single source file to 
> produce output in a number of formats, both online and printed (dvi, 
> html, info, pdf, xml, etc.).
> 
> This is an update to the latest upstream release.  See

Hi Ken,

Thanks for this update.

This seems to break building the cygwin documentation:

 > [...]
> docbook2x-texi --xinclude --info --utf8trans-map=charmap ../../../../src/winsup/doc/cygwin-api.xml --string-param output-file=cygwin-api
> could not find ParserDetails.ini in /usr/share/perl5/vendor_perl/5.32/XML/SAX
> could not open -: No such file or directory
> /usr/bin/db2x_texixml: program in pipeline exited with an error
> make: *** [Makefile:729: cygwin-api.info] Error 1

Poking around a bit, under the hood this is invoking makeinfo, and it 
seems that can't read from a pipeline anymore:

> $ echo foo | makeinfo
> could not open -: No such file or directory

Downgrading to 6.7, I can build again, and:

> $ echo foo | makeinfo
> -: warning: document without nodes

Is this an intentional upstream change?