[RFA] libstdc++/22203, aka PowerPC vs numeric_limits<integer>::traps

[Paolo Carlini]

Paolo Carlini wrote:

>That would require a bit of configury, likely a new empty
>config/cpu/generic/cpu_defines.h, included by c++config.h (and therefore
>by std_limits.h), and specialized in config/cpu/powerpc/, not a big
>deal, overall.
>  
>
The below is what I tested on i686-pc-linux-gnu and
powerpc64-unknown-linux-gnu,
also checking of course that the special cpu_defines.h is selected on
powerpc.

Paolo.

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