[Webkit-unassigned] [Bug 220315] New: build-webkit compilation error on macOS Catalina 10.15.7

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220315

            Bug ID: 220315
           Summary: build-webkit compilation error on macOS Catalina
                    10.15.7
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: macOS 10.15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: ANGLE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dario.damico at gmail.com
                CC: dino at apple.com

WebKit does not build on macOS Catalina 10.15.7 because of a compilation error in the Metal Angle renderer.

    /Users/dari8942/Desktop/WebKit/Source/ThirdParty/ANGLE/src/libANGLE/renderer/metal/mtl_utils.mm:530:17: error: 
       'setPreserveInvariance:' is only available on macOS 11.0 or newer
       [-Werror,-Wunguarded-availability-new]
        options.preserveInvariance = true;
            ^~~~~~~~~~~~~~~~~~

User ap on the Slack WebKit channel suggested to change MAX_ALLOWED to MIN_REQUIRED in the preprocessor conditions that guard the compilation of that line.

It seems like that does the trick because I tried in my local repo and it gets rid of the error; however the build still fails for some other reason that I am investigating. 

In short, there seems to be a similar 10.15 vs 11.0 problem that affects Cocoa/AVAssetWriterSPI.h. Not sure whether I should create a separate bug report or just keep adding to this as I discover new compilation errors.

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