_cleanup() vs Linux fcloseall()

It seems that some 3rd party code, pmake in particular, rely on
the implementation exporting _cleanup() to close all open file
descriptors. Linux supplies fcloseall() and does not export
_cleanup().

In the initial cut of symbol versioning for libc, I did not
export _cleanup(). This breaks pmake, and perhaps some other
3rd party applications. Do we want to continue to export this
interface, or should we provide an equivalent of Linux'
fcloseall()?

--
DE

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