[cfe-commits] [patch] Add a runtime option to match --with-gcc-toolchain

[Rafael Espíndola]

The attached patch adds the command line option -ccc-gcc-toolchain
which has the some effect at runtime as --with-gcc-toolchain has at
configure time. This finally lets us write a testcase for that
feature.

One thing I am not too happy about the patch is having to pass an
ArgList all over the place. Any ideas on how to factor this better?

Cheers,
Rafael
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