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Reduce -Wregister from DefaultError to a default-on warning.
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Authored by jyknight on Jun 12 2020, 3:44 PM.



There is a lot of C++ code in the wild still using 'register', which
will become broken if we switch the default compilation mode to
C++17. A default-on warning seems to get the message across
sufficiently, without unnecessarily breaking code that hasn't asked
for it (e.g. with -Werror). GCC has also chosen to make -Wregister an
on-by-default warning.

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jyknight created this revision.Jun 12 2020, 3:44 PM
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