https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68744
--- Comment #9 from John David Anglin <danglin at gcc dot gnu.org> --- Author: danglin Date: Sat Jan 23 23:32:13 2016 New Revision: 232770 URL: https://gcc.gnu.org/viewcvs?rev=232770&root=gcc&view=rev Log: PR libfortran/68744 * runtime/backtrace.c: Include gthr.h. (show_backtrace): Use __gthread_active_p() to determine whether threads are active. Return if lbstate is NULL. Modified: trunk/libgfortran/ChangeLog trunk/libgfortran/runtime/backtrace.c