[cfe-commits] Support -cxx-isystem and removal of -cxx-system-include

[Douglas Gregor]

Looks good to me.

On Feb 21, 2011, at 11:45 AM, Joerg Sonnenberger wrote:

> Hi all,
> this patch supersedes the version in PR 8945. It provides the
> -cxx-isystem option as found in NetBSD's gcc. It works like -isystem,
> but is skipped for non-C++ builds. It can be used (in combination with
> -nostdinc++) to switch the C++ STL implementation and it is useful for
> cross-compiling. The patch also removes the former cc1-only option
> -cxx-system-include, since the functionality is effectively contained.
> Compared to the earlier version, -cxx-isystem and -isystem are kept in
> order relative to each other.
> 
> Joerg
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