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doc: add info on libyang install and configure options

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Signed-off-by: Lou Berger <lberger@labn.net>
This commit is contained in:
Lou Berger 2018-10-31 08:31:46 -04:00
parent 62565dc96b
commit aedd2f8515
1 changed files with 37 additions and 0 deletions
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37
doc/developer/building-libyang.rst
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@ -4,6 +4,23 @@ The libyang library can be installed from third-party packages available `here
Note: the libyang dev/devel packages need to be installed in addition
to the libyang core package in order to build FRR successfully.
For example, for CentOS 7.x:
.. code-block:: shell
wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/CentOS-7-x86_64-Packages/libyang-0.16.46-0.x86_64.rpm
wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/CentOS-7-x86_64-Packages/libyang-devel-0.16.46-0.x86_64.rpm
sudo rpm -i libyang-0.16.46-0.x86_64.rpm libyang-devel-0.16.46-0.x86_64.rpm
or Ubuntu 18.04:
.. code-block:: shell
wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/Ubuntu-18.04-x86_64-Packages/libyang-dev_0.16.46_amd64.deb
wget https://ci1.netdef.org/artifact/LIBYANG-YANGRELEASE/shared/build-1/Ubuntu-18.04-x86_64-Packages/libyang_0.16.46_amd64.deb
sudo apt install libpcre3-dev
sudo dpkg -i libyang-dev_0.16.46_amd64.deb libyang_0.16.46_amd64.deb
Alternatively, libyang can be built and installed manually by following
the steps below:
@ -23,3 +40,23 @@ When building libyang on CentOS 6, it's also necessary to pass the
Note: please check the `libyang build requirements
<https://github.com/CESNET/libyang/blob/master/README.md#build-requirements>`_
first.
Libyang uses loadable libraries an YANG modules. It supports
environment variables to allow overriding the load paths for each of
these. With FRR, this override currently must be done at the time of
running FRR's configure command using new options. The new options are:
.. code-block:: shell
--with-yangmodelsdir=DIR
yang models directory (${datarootdir}/yang)
--with-libyang-pluginsdir=DIR
yangmodule plugins directory
(${libdir}/frr/libyang_plugins)
an example which uses the compile directory is:
.. code-block:: shell
./configure --with-libyang-pluginsdir="`pwd`/yang/libyang_plugins/.libs" \
--with-yangmodelsdir="`pwd`/yang"