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path: root/gnu/packages/patches/libgcrypt-make-yat2m-reproducible.patch
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Make yat2m in libgcrypt respect SOURCE_DATE_EPOCH, making
the build reproducible.

This was already fixed upstream in GnuPG:
https://dev.gnupg.org/rG139de02b93773615bdd95e04a7f0c1ad73b4f6fb

and in libgpg-error:
https://dev.gnupg.org/rE5494a5728418938d2e42158bb646b07124184e64


--- a/doc/yat2m.c 2017-11-23 19:16:58.000000000 +0100
+++ b/doc/yat2m.c 2017-08-28 12:22:54.000000000 +0200
@@ -1475,6 +1484,7 @@
 main (int argc, char **argv)
 {
   int last_argc = -1;
+  const char *s;
 
   opt_source = "GNU";
   opt_release = "";
@@ -1608,6 +1618,11 @@
   if (argc > 1)
     die ("usage: " PGM " [OPTION] [FILE] (try --help for more information)\n");
 
+  /* Take care of supplied timestamp for reproducible builds.  See
+   * https://reproducible-builds.org/specs/source-date-epoch/  */
+  if (!opt_date && (s = getenv ("SOURCE_DATE_EPOCH")) && *s)
+    opt_date = s;
+
   /* Start processing. */
   if (argc && strcmp (*argv, "-"))
     {