Doing test compiles in CMake to check whether to use particular compiler options

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

On Jul 14, 2013, at 5:39 AM, tuexen () wireshark org wrote:

> http://anonsvn.wireshark.org/viewvc/viewvc.cgi?view=rev&revision=50576
>
> User: tuexen
> Date: 2013/07/14 05:39 AM
>
> Log:
> Don't use compiler options not supported by clang in XCode 4.6.3
> on Apple platforms.

Should try_compile() be used with CMake to test whether particular compiler options are supported by the C compiler, 
just as the autoconf script uses AC_COMPILE_IFELSE?  (Sadly, it appears that CMake would require that the test program 
be in a file of its own, rather than letting you embed it in the script, as autoconf does.)
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