#define *tracef*('fmt', ...)
#define *vtracef*('fmt', 'ap')
-Link with `-llttng-ust`.
+Link with `-llttng-ust -llttng-ust-common`.
DESCRIPTION
[role="term"]
----
-$ cc -o app app.c -llttng-ust
+$ cc -o app app.c -llttng-ust -llttng-ust-common
----
You can create an LTTng tracing session, enable the `tracef()` events,