Re: pkg/35230 (devel/cpuflags assumes gcc)

[David Brownlee <abs%NetBSD.org@localhost>]

        Annoyingly it looks like sunpro has an xtarget option for sparc
        that should do exactly what we want:

          native    Set the parameters for the best performance
                    on the host environment. The compiler chooses
                    the appropriate setting for producing 32-bit
                    binaries for the system on which the proces-
                    sor is running.

          native64  Set the parameters for the best performance
                    on the 64-bit host environment. The compiler
                    chooses the appropriate setting for producing
                    64-bit binaries for the system on which the
                    processor is running.

        but the one for x86 is somewhat lacking in comparison:

          native    Compile for good performance on this system.
                    This option uses the best instruction set for
                    good performance on most processors without
                    major performance degradation on any of them.
                    With each new release, the definition of
                    "best" instruction set may be adjusted, if
                    appropriate.

        I'd be curious to see what '-xdryrun -xtarget=native' reported
        on your system or systems.

        The other interesting questions are:
        - how do you determine if your Solaris system is 32bit or 64bit
        - For sparc, xtarget has a massive set of possible system names, but
          how can we extract the current system name (and possibly, is it
          even needed given -xtarget=native
        - For x86, how can we tell if we are opteron, p4, p3, or below

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