[bug#49640] [PATCH core-updates] gnu: ghostscript: Improve reproducibility of PDF document generation

[Guillaume Le Vaillant]

Hi,

When trying to solve a reproducibility issue when generating the
PDF documentation of the txr software (see [1]), Paul Patience noticed
that ghostscript writes a creation date in the PDF even when the
GS_GENERATE_UUIDS environment variable is set to "0".

The attached patch updates 'ghostscript-no-header-creationdate.patch' to
fix this issue.

Given the amount of rebuilds caused by modifying ghostscript, this
should go to core-updates, but is core-updates in freeze state already,
or can I push this patch right now?

Note: Even with this patch, there are still some cases where PDF
generation by ghostscript is not reproducible (for reasons not related
to creation date), like groff-doc.

[1]: https://bugs.gnu.org/49517

0001-gnu-ghostscript-Improve-reproducibility-of-PDF-docum.patch
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