Replace patch 291 with the upstream fix.

00291-setup-Link-ctypes-against-dl-explicitly.patch

@@ -1,25 +1,15 @@
-From aae2ef0bace0e38f4ee5aaa4642aa32450a84216 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
-Date: Tue, 23 Jan 2018 14:43:43 +0100
-Subject: [PATCH] setup: Link ctypes against dl explicitly
-
----
- setup.py | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
 diff --git a/setup.py b/setup.py
-index c23628a2a9..9e40bb53e6 100644
+index f4f6e4fdb1f0..8536c350fe3a 100644
 --- a/setup.py
 +++ b/setup.py
-@@ -1935,7 +1935,7 @@ class PyBuildExt(build_ext):
+@@ -2005,6 +2005,10 @@ def detect_ctypes(self, inc_dirs, lib_dirs):
-         self.use_system_libffi = False
+             ext.libraries.append(ffi_lib)
-         include_dirs = []
+             self.use_system_libffi = True
+ 
++        if sysconfig.get_config_var('HAVE_LIBDL'):
++            # for dlopen, see bpo-32647
++            ext.libraries.append('dl')
++
+     def _decimal_ext(self):
          extra_compile_args = []
--        extra_link_args = []
+         undef_macros = []
-+        extra_link_args = ['-ldl']
-         sources = ['_ctypes/_ctypes.c',
-                    '_ctypes/callbacks.c',
-                    '_ctypes/callproc.c',
--- 
-2.16.1
-

python3.spec

@@ -370,6 +370,7 @@ Patch290: 00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch
 # Build fails with undefined references to dlopen / dlsym otherwise.
 # See: https://bugzilla.redhat.com/show_bug.cgi?id=1537489
 # and: https://src.fedoraproject.org/rpms/redhat-rpm-config/c/078af19
+# Fixed upstream: https://bugs.python.org/issue32647
 Patch291: 00291-setup-Link-ctypes-against-dl-explicitly.patch
 
 # 00292 #