[Webkit-unassigned] [Bug 172750] New: [CMake] Do not pass -Wno-expansion-to-defined to Clang <4.0.0

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172750

            Bug ID: 172750
           Summary: [CMake] Do not pass -Wno-expansion-to-defined to Clang
                    <4.0.0
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aperez at igalia.com
                CC: lforschler at apple.com

As per Carlos López's comment on bug #167643:

> I get thousands of warnings printed like this:
> warning: unknown warning option '-Wno-expansion-to-defined'; did you mean '-Wno-macro-redefined'? [-Wunknown-warning-option]
>
> Using clang-3.8 with ccache.

With Clang 4.0 there is no such warning.

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