This patch makes emission of /CreationDate and /ModDate headers optional.

If the environment variable GS_GENERATE_UUIDS is set to "0" or "no", it will
not write out the "/ID" field (if that's permissible).

Upstream does not want to do this.

See: https://bugs.ghostscript.com/show_bug.cgi?id=698208
diff --git a/orig/gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c b/bb/gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c
index 0fb067e..b342e2c 100644
--- orig/gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c
+++ gnu-ghostscript-9.14.0/devices/vector/gdevpdf.c
@@ -305,6 +305,9 @@ pdf_initialize_ids(gx_device_pdf * pdev)
      * date and time, rather than (for example) %%CreationDate from the
      * PostScript file.  We think this is wrong, but we do the same.
      */
+    if (!getenv("GS_GENERATE_UUIDS") ||
+        (strcasecmp(getenv("GS_GENERATE_UUIDS"), "0") != 0 &&
+         strcasecmp(getenv("GS_GENERATE_UUIDS"), "no") != 0))
     {
         struct tm tms;
         time_t t;
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<tr><td><span title='2021-12-18 04:09:47 +0100'>2021-12-18</span></td><td><a href='/guix/commit/tests/cran.scm?id=10ceb3e84654e024f14a4b048e7d68492ed9dc7c'>import: cran: Fix description-&gt;package test.</a><span class='msg-avail'>...<span class='msg-tooltip'>This follows up on commit 5cd1019488c44081aaf030fbe8bc357d78daef23.

* tests/cran.scm (description): Include a very long line.
(description-&gt;package): Update the golden description to match the
paragraph filling now performed by BEAUTIFY-DESCRIPTION.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-07-11 00:49:16 +0200'>2021-07-11</span></td><td><a href='/guix/commit/tests/cran.scm?id=aa6921634b4ea9988af0e37bfbb56780c431ef64'>import: cran: Emit new-style package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/import/cran.scm (format-inputs): Emit symbols or
'specification-&gt;package' calls.
(maybe-inputs): Wrap in 'list' instead of 'quasiquote'.
* tests/cran.scm ("description-&gt;package"): Adjust accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-01-16 23:14:05 +0100'>2020-01-16</span></td><td><a href='/guix/commit/tests/cran.scm?id=cfd1ed84013df85f0e473884ef4038b4bd7120d4'>import: cran: Avoid uses of '@@' in the tests.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/import/cran.scm (description-&gt;alist, description-&gt;package): Export.
&lt;top level&gt;: Set! 'listify'.
* tests/cran.scm (description-alist, "description-&gt;package"): Remove use
of '@@' to access the relevant bindings.
</span></span></td><td>Ludovic Courtès</td></tr>