From: David Hunt Date: Fri, 16 Nov 2018 15:47:21 +0000 (+0000) Subject: doc: add jansson link instructions for power app X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=3f04e13a87be9e7b4a6c7dbd50bc186d37a33953;p=dpdk.git doc: add jansson link instructions for power app Add more info to the docs on how to set environmental variable to correctly build the vm_power_manager sample app in a cross compile or multilib environment by setting PKG_CONFIG_LIBDIR. Signed-off-by: David Hunt Acked-by: Marko Kovacevic --- diff --git a/doc/guides/sample_app_ug/vm_power_management.rst b/doc/guides/sample_app_ug/vm_power_management.rst index 1ad4f1490d..5be9f24d59 100644 --- a/doc/guides/sample_app_ug/vm_power_management.rst +++ b/doc/guides/sample_app_ug/vm_power_management.rst @@ -657,6 +657,31 @@ To build just the ``guest_vm_power_manager`` application using ``make``: The resulting binary will be ${RTE_SDK}/build/examples/guest_cli +.. Note:: + This sample application conditionally links in the Jansson JSON + library, so if you are using a multilib or cross compile environment you + may need to set the ``PKG_CONFIG_LIBDIR`` environmental variable to point to + the relevant pkgconfig folder so that the correct library is linked in. + + For example, if you are building for a 32-bit target, you could find the + correct directory using the following ``find`` command: + + .. code-block:: console + + # find /usr -type d -name pkgconfig + /usr/lib/i386-linux-gnu/pkgconfig + /usr/lib/x86_64-linux-gnu/pkgconfig + + Then use: + + .. code-block:: console + + export PKG_CONFIG_LIBDIR=/usr/lib/i386-linux-gnu/pkgconfig + + You then use the make command as normal, which should find the 32-bit + version of the library, if it installed. If not, the application will + be built without the JSON interface functionality. + To build just the ``vm_power_manager`` application using ``meson/ninja``: .. code-block:: console