[Bug libstdc++/47792] [4.6 Regression] concurrence.h:292:9: error: '__gthread_mutex_destroy' was not declared in this scope

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47792

--- Comment #8 from John David Anglin <danglin at gcc dot gnu.org> 2011-02-18 
02:50:28 UTC ---
Correcting the typo fixes the error.