[Bug testsuite/15703] map_hash.exp failures on rawhide because of gcc 'var-tracking-assignments' warning

[jistone at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15703

Josh Stone <jistone at redhat dot com> changed:

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                 CC|                            |jistone at redhat dot com

--- Comment #1 from Josh Stone <jistone at redhat dot com> ---
(In reply to David Smith from comment #0)
> I'm not sure of the best way of fixing these errors.

We don't generally care about debuginfo for our stap modules, so perhaps we can
just inject -fno-var-tracking-assignments?  Maybe with an environment control
or something for when we do care.

And not all gcc will support this, so it should be conditional with cc-option,
like we do when adding -Wframe-larger-than.

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