Add patch to explicitly link _ctypes module with -ldl (#1537489)

Refactored patch for libxcrypt
Re-enable strict symbol checks in the link editor

00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch

@@ -1,4 +1,4 @@
-From 6811089dbf34a2cef9799e1cb6d63b863b58739f Mon Sep 17 00:00:00 2001
+From bb9a8332e54fd6d2b0d4767b55c7df9a36ad3022 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
 Date: Sun, 21 Jan 2018 18:55:31 +0100
 Subject: [PATCH] cryptmodule: Include <crypt.h> for declaration of crypt() if
@@ -9,18 +9,18 @@ and may use an external or replacement library, like libxcrypt, for
 providing such functions.
 ---
  Modules/_cryptmodule.c | 4 ++++
- configure.ac           | 4 ++++
- 2 files changed, 8 insertions(+)
+ configure.ac           | 2 +-
+ 2 files changed, 5 insertions(+), 1 deletion(-)
 
 diff --git a/Modules/_cryptmodule.c b/Modules/_cryptmodule.c
-index 58d179e6a3..bb26d83f55 100644
+index 58d179e6a3..0031037b64 100644
 --- a/Modules/_cryptmodule.c
 +++ b/Modules/_cryptmodule.c
 @@ -5,6 +5,10 @@
  
  #include <sys/types.h>
  
-+#if defined(HAVE_XCRYPT)
++#if defined(HAVE_CRYPT_H)
 +#include <crypt.h>
 +#endif
 +
@@ -28,20 +28,18 @@ index 58d179e6a3..bb26d83f55 100644
  
  /*[clinic input]
 diff --git a/configure.ac b/configure.ac
-index 39e2e8e769..129c198c15 100644
+index 39e2e8e769..79397a7a24 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -2816,6 +2816,10 @@ LIBS="$withval $LIBS"
- 
- PKG_PROG_PKG_CONFIG
- 
-+# Check for libxcrypt is present.
-+PKG_CHECK_MODULES([libxcrypt], libxcrypt,
-+            AC_DEFINE([HAVE_XCRYPT], 1, [Define to 1 if libxcrypt is found.]), [])
-+
- # Check for use of the system expat library
- AC_MSG_CHECKING(for --with-system-expat)
- AC_ARG_WITH(system_expat,
+@@ -2049,7 +2049,7 @@ AC_CHECK_HEADERS(asm/types.h conio.h direct.h dlfcn.h errno.h \
+ fcntl.h grp.h \
+ ieeefp.h io.h langinfo.h libintl.h process.h pthread.h \
+ sched.h shadow.h signal.h stropts.h termios.h \
+-unistd.h utime.h \
++unistd.h crypt.h utime.h \
+ poll.h sys/devpoll.h sys/epoll.h sys/poll.h \
+ sys/audioio.h sys/xattr.h sys/bsdtty.h sys/event.h sys/file.h sys/ioctl.h \
+ sys/kern_control.h sys/loadavg.h sys/lock.h sys/mkdev.h sys/modem.h \
 -- 
-2.16.0
+2.16.1