README: document that gperf 3.1 is required for building now

2 files changed, 4 insertions, 1 deletions

diff --git a/NEWS b/NEWS
index 9687bb81a9..f177ca31e6 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,9 @@ systemd System and Service Manager
 
 CHANGES WITH 233:
 
+        * This version requires at least gperf 3.1 for building, 3.0 is not
+          sufficient.
+
         * The "hybrid" control group mode has been modified to improve
           compatibility with "legacy" cgroups-v1 setups. Specifically, the
           "hybrid" setup of /sys/fs/cgroup is now pretty much identical to
diff --git a/README b/README
index 30b5f71876..260668c8db 100644
--- a/README
+++ b/README
@@ -165,7 +165,7 @@ REQUIREMENTS:
         autoconf
         libtool
         intltool
-        gperf
+        gperf >= 3.1
         python (optional)
         python-lxml (optional, but required to build the indices)