TAU_GLOBAL_TIMER_EXTERNAL(3) on Linux
The text 7a6ddcd03109, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 4.0 (Etch) shipped it. The page shows this text now.
Declares a global timer from an external compilation unit