libcamera: tracing: Implement tracing infrastructure

Implement tracing infrastructure in libcamera. It takes .tp files, as
required by lttng, and generates a tracepoint header and C file, as lttng
requires. meson is updated accordingly to get it to compile with the
rest of libcamera. Update the documentation accordingly.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/README.rst b/README.rst
index 74babaf7..f8519b44 100644
--- a/README.rst
+++ b/README.rst
@@ -81,6 +81,9 @@ for gstreamer: [optional]
 for qcam: [optional]
 	qtbase5-dev libqt5core5a libqt5gui5 libqt5widgets5 qttools5-dev-tools libtiff-dev
 
+for tracing with lttng: [optional]
+        lttng-ust-dev python3-jinja2
+
 Using GStreamer plugin
 ~~~~~~~~~~~~~~~~~~~~~~