When I run ./configure .... under uclibc, it can succcessful produce a Makefile. But with that makefile, compilation will fail because the lack of THREAD_TLS under uclibc. Then I went on to modify ( by hand ) src/include/autoconf.h to comment HAVE_THREAD_TLS, then compilation could be completed. However, the produced binary will not work under multithread mode, it will only work under these modes :- radiusd -X radiusd -s radiusd -t It will not work if it's run as :- radiusd Well, this behaviour is repeatable under gnu lib environment too ( tested under debian environment), ie run ./configure, edit src/include/autoconf.h by hand to comment HAVE_THREAD_TLS. Any suggest what's next best thing to do ? Regards.