[Webkit-unassigned] [Bug 38747] New: mingw-w64 and JIT support

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=38747

           Summary: mingw-w64 and JIT support
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows 7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: vanboxem.ruben at gmail.com
                CC: aroben at apple.com, benjamin.poulain at nokia.com


Since the recently landed patches for bug
https://bugs.webkit.org/show_bug.cgi?id=35607 (which have been introduced in
QtWebkit as well), I have stumbled upon a serious issue with mingw-w64 and
enabled JIT.

The above patches (see bug report) enable JIT for a X86_64 Windows when using
mingw-w64. This was a mistake, as even MSVC x64 builds don't enable it and the
JIT crashes any webkit program using the build. Without it, everything is
perfectly fine.

I'm sorry I didn't upload a patch, but there are only two lines to be removed
(line 943-944 (trunk) of JavaScriptCore/wtf/Platform.h, those enabling JIT on
the x64 Windows builds with mingw-w64).

It would of course be better to fix JIT on Win64, but I am in no position
(knowledge or otherwise) to do so, and I'm leaving that to more experienced
people.

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