check if perf support libtraceevent #520
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Some distros **cough** ubuntu **cough** build perf without libtraceevent support. In this case tracepoints obviosly don't work. This patch adds a check for this and shows the user an error message. closes: #519
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Some distros cough ubuntu cough build perf without libtraceevent support. In this case tracepoints obviosly don't work. This patch adds a check for this and shows the user an error message.
closes: #519