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='2019-06-20 10:19:12 +0200'>2019-06-20</span></td><td><a href='/guix/commit/gnu/packages/patches/symmetrica-return_values.patch?id=75a73bb024c840dc7a917a527915ff8d8d918af8'>gnu: Add symmetrica.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/algebra.scm (symmetrica): New variable.
* gnu/packages/patches/symmetrica-bruch.patch:
* gnu/packages/patches/symmetrica-int32.patch:
* gnu/packages/patches/symmetrica-return_values.patch:
* gnu/packages/patches/symmetrica-sort_sum_rename.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add patches.
</span></span></td><td>Nicolas Goaziou</td></tr>