$NetBSD: patch-src_estream.c,v 1.4 2018/03/16 09:48:00 adam Exp $

Don't use atexit(), since this library mey be dlopen()ed
and dlclose()d before exit() is called.

Instead mark the do_deinit() function as a destructor.

https://bugs.g10code.com/gnupg/issue1749

--- src/estream.c.orig	2018-02-21 19:50:18.000000000 +0000
+++ src/estream.c
@@ -485,6 +485,7 @@ do_list_remove (estream_t stream, int wi
 /*
  * The atexit handler for the entire gpgrt.
  */
+__attribute__((destructor,used))
 static void
 do_deinit (void)
 {
@@ -515,7 +516,16 @@ _gpgrt_estream_init (void)
   if (!initialized)
     {
       initialized = 1;
+#if 0
+      /* This library may be unloaded via dlclose() before
+       * exit() is called, causing the atexit handler to try
+       * to jump into unmapped address space, causing a segfault.
+       * This has been observed with apache and php.  Instead, use
+       * the destructor attribute, since that will cause it
+       * to be called on dlclose() as well.
+       */
       atexit (do_deinit);
+#endif
     }
   return 0;
 }