doc: update libyang build instructions

The --with-yangmodelsdir and --with-libyang-pluginsdir build-time options
pertain to FRR so they shouldn't be placed along with the libyang build
instructions. Move these instructions to where they belong to avoid
confusion.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/doc/user/installation.rst b/doc/user/installation.rst
index b7f0712a1b..0a8cef53e1 100644
--- a/doc/user/installation.rst
+++ b/doc/user/installation.rst
@@ -255,6 +255,24 @@ options to the configuration script.
    Configure zebra to use `dir` for local state files, such as pid files and
    unix sockets.
 
+.. option:: --with-yangmodelsdir <dir>
+
+   Look for YANG modules in `dir` [`prefix`/share/yang]. Note that the FRR
+   YANG modules will be installed here.
+
+.. option:: --with-libyang-pluginsdir <dir>
+
+   Look for libyang plugins in `dir` [`prefix`/lib/frr/libyang_plugins].
+   Note that the FRR libyang plugins will be installed here.
+
+When it's desired to run FRR without installing it in the system, it's possible
+to configure it as follows to look for YANG modules and libyang plugins in the
+compile directory:
+.. code-block:: shell
+
+   ./configure --with-libyang-pluginsdir="`pwd`/yang/libyang_plugins/.libs" \
+               --with-yangmodelsdir="`pwd`/yang"
+
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