git-svn-id: https://google-glog.googlecode.com/svn/trunk@39 eb4d4688-79bd-11dd-afb4-1d65580434c0

has execinfo.h (e.g., MacOSX 10.5). Though dladdr may not be async
signal safe, it's OK since glog's stacktrace doesn't depend on signals.


git-svn-id: https://google-glog.googlecode.com/svn/trunk@7 eb4d4688-79bd-11dd-afb4-1d65580434c0

git-svn-id: https://google-glog.googlecode.com/svn/trunk@2 eb4d4688-79bd-11dd-afb4-1d65580434c0