--- libssh2-1.9.0/configure.ac.ORIG	2021-04-12 11:23:19.331827300 -0700
+++ libssh2-1.9.0/configure.ac	2021-04-12 11:23:59.738111400 -0700
@@ -127,8 +127,6 @@
 m4_set_foreach([crypto_backends], [backend],
   [AM_CONDITIONAL(m4_toupper(backend), test "$found_crypto" = "backend")]
 )
-m4_undefine([backend])
-
 
 # libz