tree c281c0210a45149356699247816e3e658e348416
parent e23e3c44e1fcbf1ee621ef051fa42f8824a43d40
author Jason Evans <jasone@canonware.com> 1398224887 -0700
committer Jason Evans <jasone@canonware.com> 1398224887 -0700

Update libunwind configuration check to look for unw_backtrace().

Update libunwind configuration check to look for unw_backtrace(), which
is a newer API not available in older versions of libunwind.