[lto] PATCH: add -fwhopr option

[Diego Novillo]

Ollie Wild wrote:

> This change breaks a few test cases.  However, these are all explicit
> violations of the "-flto doesn't work with -g" error.

I removed this message last week.  The problem with this is that it
causes artificial failures in the testsuites and prevent testing
codegen.  If the debug info is bad, this should cause failures in gdb
testsuites, but it should not cause failures during code generation.

I've added -fwhopr to libstdc++, changed the above and committed the
attached patch.


Thanks.  Diego.
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