At http://lists.infradead.org/pipermail/openconnect-devel/2014-July/002070.html a user reports:
The procedure entry point strerror_s could not be located in the dynamic link library msvcrt.dll
I'm not sure if this is a failing in the mingw runtime, or if it's just wrong to be using strerror_s here.
This should already be fixed in mingw-p11-kit-0.20.2-2.fc20 which was pushed to F20-updates on July 19 2014. Can you indicate whether this updated package resolves the issue?
Thanks. I don't have XP here for testing, but have asked the above user to test.
"thanks, I have updated mingw-p11-kit package, and copy the latest DLL, now it work."