Build system: Check for “libiptc/libip6tc.h” and “linux/netfilter/x_tables.h”, too.

[collectd.git] / README

diff --git a/README b/README
index 8deaf0e..7412765 100644 (file)
--- a/README
+++ b/README
@@ -453,11 +453,16 @@ Prerequisites
     If present, the uuid plugin will check for UUID from HAL.
     <http://hal.freedesktop.org/>
 
-  * libiptc (optional, if not found a version shipped with this distribution
-    can be used if the Linux kernel headers are available)
+  * libiptc (optional)
     For querying iptables counters.
     <http://netfilter.org/>
 
+    If not found on the system, a version shipped with this distribution can
+    be used. It requires some Linux headers in /usr/include/linux. You can
+    force the build system to use the shipped version by specifying
+      --with-libiptc=shipped
+    when running the configure script.
+
   * libjvm (optional)
     Library that encapsulates the `Java Virtual Machine' (JVM). This library is
     used by the Java plugin to execute Java bytecode. See “Configuring with
@@ -482,8 +487,7 @@ Prerequisites
     For the `notify_desktop' plugin.
     <http://www.galago-project.org/>
 
-  * liboping (optional, if not found a version shipped with this distribution
-    can be used)
+  * liboping (optional)
     Used by the `ping' plugin to send and receive ICMP packets.
     <http://verplant.org/liboping/>
 
@@ -553,7 +557,10 @@ Configuring / Compiling / Installing
   will be enabled). To enable a plugin, install missing dependencies (see
   section `Prerequisites' above) and rerun `configure'. If you specify the
   `--enable-<plugin>' configure option, the script will fail if the depen-
-  dencies for the specified plugin are not met. If you specify the
+  dencies for the specified plugin are not met. In that case you can force the
+  plugin to be built using the `--enable-<plugin>=force' configure option.
+  This will most likely fail though unless you're working in a very unusual
+  setup and you really know what you're doing. If you specify the
   `--disable-<plugin>' configure option, the plugin will not be built. If you
   specify the `--enable-all-plugins' or `--disable-all-plugins' configure
   options, all plugins will be enabled or disabled respectively by default.