abort in configure when only openssl-1.1.x found

We don't support openssl-1.1.x yet (see multiple threads on the
openssh-unix-dev@ mailing list for the reason), but previously
./configure would accept it and the compilation would subsequently
fail. This makes ./configure display an explicit error message and
abort.

ok dtucker@

1 files changed, 4 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index e9c593acb..4eb65f52c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2549,7 +2549,10 @@ if test "x$openssl" = "xyes" ; then
                                 10000*|0*)
                                         AC_MSG_ERROR([OpenSSL >= 1.0.1 required (have "$ssl_library_ver")])
                                         ;;
-                                *) ;;
+                                100*)   ;; # 1.0.x
+                                *)
+                                        AC_MSG_ERROR([OpenSSL >= 1.1.0 is not yet supported (have "$ssl_library_ver")])
+                                        ;;
                         esac
                         AC_MSG_RESULT([$ssl_library_ver])
                 ],