Hidden PLT workaround

[Boris Arnoux]

> a symbol export map does only what its name implies -- it controls the lists
> of symbols exported from the finally linked object.  it has no bearing at all
> on the compiling/linking steps.  the only thing making the calls bypass the
> PLT is that set of macros.  review the list of relocs in the objects with
> readelf if you want to double check.
> -mike
>

Humm, I am pretty sure an export map does make a difference for
function calls ( after all,  a code calling PLT or directly calling the function
is the same, it is up to the linker to decide ). But I am not familiar with the
 glibc build system. Could intermediate linking steps interfere ?