g++ doesn't diagnose implicit int error

[Achim Gratz]

Keith Thompson writes:
> On Windows targets (including Cygwin and MinGW), the "-fms-extensions"
> option is enabled by default.  This option enables certain Microsoft
> extensions -- and apparently inhibits any diagnostics for implicit int.
>
> It is unfortunate, and arguably a bug, that this means that
> "g++ -std=c++11 -pedantic" fails to diagnose implicit int errors.
> I'm not sure whether this is a bug in gcc or in the way Windows
> versions of gcc are built.

In the case of Cygwin it is quite certainly a bug as Cygwin is not a
Windows target.


Regards,
Achim.
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