Don't accept UCX < 1.9

Don't just print a warning if the UCX version is too old, bail out and
demand a newer version (at least 1.9, now more than 4 years old).

Fixes #13017.

Signed-off-by: George Bosilca <[email protected]>

Author: bosilca

config/ompi_check_ucx.m4

@@ -75,14 +75,16 @@ AC_DEFUN([OMPI_CHECK_UCX],[
            AS_IF([test "${ompi_check_ucx_cv_have_version_1_8}" = "yes"],
                  [AC_MSG_WARN([UCX support skipped because version 1.8.x was found, which has a known catastrophic issue.])
                   ompi_check_ucx_happy=no])])
-           AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
+    AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
 #include <ucp/api/ucp_version.h>
                              ]], [[
 #if (UCP_API_MAJOR < 1) || ((UCP_API_MAJOR == 1) && (UCP_API_MINOR < 9))
 #error "Version too low"
 #endif
                              ]])],
-                             [], [AC_MSG_WARN([UCX version is too old, please upgrade to 1.9 or higher.])])
+                             [],
+                             [AC_MSG_WARN([UCX version is too old, please upgrade to 1.9 or higher.])
+                              ompi_check_ucx_happy=no])
 
     AS_IF([test "$ompi_check_ucx_happy" = yes],
           [AC_CHECK_DECLS([ucp_tag_send_nbr],