r231787 - Allow -target= and --target options

[Chandler Carruth]

On Tue, Mar 10, 2015 at 6:58 AM, Renato Golin <renato.golin at linaro.org>
wrote:

> Allow -target= and --target options
>
> Using clang as a cross-compiler with the 'target' option could be confusing
> for those inexperienced in the realm of cross compiling.
>
> This patch would allow the use of all these four variants of the target
> option:
> -target <triple>
> --target <triple>
> -target=<triple>
> --target=<triple>
>

Previously we insisted on using --target= because we wanted that to be the
consistent driver syntax for this option. I would prefer to continue to
insist on that.

I think offering choices here is a very serious mistake. This is our
driver's flag, and we should have some freedom to specify its syntax.

Could we go back to requiring explicitly '--target='?
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