From f1bde1cf0d4ed0b7d68ac0acee7b33fa69847cd7 Mon Sep 17 00:00:00 2001 From: Christophe Bedard Date: Mon, 18 May 2020 20:50:39 -0400 Subject: [PATCH] Mention needing to install LTTng and re-build if using Debians Signed-off-by: Christophe Bedard --- README.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 73cdc89..8781aea 100644 --- a/README.md +++ b/README.md @@ -6,6 +6,8 @@ Tracing tools for ROS 2. ## Building +As of Foxy, these instructions also apply to an installation from the Debian packages; it will not work out-of-the-box. Also, note that tracing using `ros2_tracing` is not supported on non-Linux systems. + If LTTng is not found during build, or if the [`TRACETOOLS_DISABLED` option is enabled](#disabling-tracing), then this package will not do anything. To enable tracing: @@ -16,7 +18,7 @@ To enable tracing: $ sudo apt-get install lttng-tools lttng-modules-dkms liblttng-ust-dev $ sudo apt-get install python3-babeltrace python3-lttng ``` -2. Build +2. Build (at least up to `rcl` & `rclcpp`): ``` $ colcon build ```