Don't link with libcrypt.
--- Makefile.in.orig	2014-01-29 05:58:23.000000000 -0600
+++ Makefile.in	2015-08-31 17:04:58.000000000 -0400
@@ -162,7 +162,7 @@
 INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
 LDFLAGS = @LDFLAGS@
 LIBOBJS = @LIBOBJS@
-LIBS = -lcrypt @LIBS@
+LIBS = @LIBS@
 LTLIBOBJS = @LTLIBOBJS@
 MAKE = @MAKE@
 MAKEINFO = @MAKEINFO@
--- configure.orig	2014-01-29 05:58:24.000000000 -0600
+++ configure	2015-08-31 17:14:38.000000000 -0400
@@ -3506,7 +3506,7 @@
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lcrypt  $LIBS"
+LIBS=" $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */