README: document that we only support util-linux built with --enable-libmount-force...

Fixes: #2978

diff --git a/NEWS b/NEWS
index b75638e..58a0f03 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -417,6 +417,9 @@ CHANGES WITH 228:
 
           https://sourceware.org/bugzilla/show_bug.cgi?id=19108
 
+          Note that only util-linux versions built with
+          --enable-libmount-force-mountinfo are supported.
+
         * Support for the ".snapshot" unit type has been removed. This
           feature turned out to be little useful and little used, and
           has now been removed from the core and from systemctl.

diff --git a/README b/README
index 0118c10..ca8993c 100644 (file)
--- a/README
+++ b/README
@@ -118,6 +118,7 @@ REQUIREMENTS:
         glibc >= 2.16
         libcap
         libmount >= 2.27.1 (from util-linux)
+                (util-linux *must* be built with --enable-libmount-force-mountinfo)
         libseccomp >= 1.0.0 (optional)
         libblkid >= 2.24 (from util-linux) (optional)
         libkmod >= 15 (optional)