[cfe-dev] [patch]Frontend generate cxx-system-include

[Jean-Daniel Dupas]

When using libc++, the Driver passes the no longer supported -cxx-system-include argument to -cc1.
There is an other place where -cxx-system-include may be generated in Frontend too.

If the new "-cxx-isystem" arg is a drop in replacement, the 2 attached patches should be safe, else they fix my compilation issue at least.

cxx-isys.patch is for the Driver and libc++
cxx-isys2.patch is for the Frontend.


-- Jean-Daniel


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