On Jan 22, 2016, at 12:24 PM, Guy Harris <g...@alum.mit.edu> wrote:
> CMake has the macros CHECK_C_COMPILER_FLAG and CHECK_CXX_COMPILER_FLAG, which
> allow checking for whether a given C or C++ compiler flag is supported by the
> compiler being used.
>
> However, there's no CHECK_LINKER_FLAG macro, so that you can check whether a
> given *linker* flag is supported by the linker being used, so there doesn't
> seem to be a good way to use a flag, such as the --as-needed flag, if it's
> not *required*, but is "nice to have", but isn't available on all platforms.
>
> So what's the best way to do such a check?
>
> (I'm assuming here that, for all generators on UN*X platforms, linking is
> done by using the compiler driver, so that you don't have to worry about, for
> example, using -Wl,{linker flag} with some generators and just {linker flag}
> with other generators.)
Bug 0015934:
https://public.kitware.com/Bug/view.php?id=15934
filed.
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