check_cxa_atexit_available

[Richard Henderson]

The test program in target-supports.exp is broken, since
it doesn't preclude the use of cleanups instead.  Indeed,
the init/cleanup3.C seems to be essentially identical to
the target-supports test.

Any suggestions that doesn't essentially reverse this
situation?  I.e. I could switch the target-supports test
to grep the assembly for __cxa_atexit, but I suspect that
would more or less automatically cause the cleanup3.C test
to pass.


r~