Re: cmake giving options the compiler does not understand

[Guy Harris <guy () alum mit edu>]

On Jan 2, 2014, at 1:34 PM, Alexis La Goutte <alexis.lagoutte () gmail com> wrote:

> I have also some time the some error message...
>
> With autotools, -Wshorten-64-to-32 is limited to only C...

Because, to quote the comment in configure.ac:

        # The Qt headers generate a ton of shortening errors on 64-bit systems
        # so only enable this for C for now.

I.e., it's not that g++ or clang++ don't support the option, it's that the bulk of our C++ code uses a framework that 
doesn't cast away those warnings (or fix them).
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