[Bug libc/18822] Internal functions are called via PLT

["joseph at codesourcery dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18822

--- Comment #74 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I don't think this will stay fixed without a checked-in testcase.

Such a testcase, to be machine-independent, should not be checking names 
of relocations.  Instead it needs to look at properties of (global/weak) 
symbols in objects that go into shared libraries.  Symbols (defined or 
undefined) that are not hidden, but are not exported from those shared 
libraries, are suspect, but I'm not sure how reliably GCC will mark 
undefined symbols hidden even given appropriate declarations (and there 
may also be issues with undefined symbols properly called from .S sources 
but not marked hidden there).  So likely lists of exceptions to any such 
tests would be needed (including architecture-specific exceptions for e.g. 
libgcc symbols).

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