[Bug other/61257] configure should check if sys/sdt.h is usable, not just checking the existance of the header

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61257

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |egallager at gcc dot gnu.org

--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Maybe once autoconf 2.70 is released, this bug could be fixed just by updating
to it, since autoconf 2.70 will change all tests for header existence to tests
for header usability.