handling failure is definately sjlj. Only enable it for the apparently
broken gcc 3.3.3 toolchain, which _does_ need it for exception handling
to work properly.
GCC-4.1.0. These tool versions are needed so that NPTL support
can be added into uClibc. Backporting NPTL from GCC-4.1.0 into
GCC-4.0 may be possible, but not recommended.