[Webkit-unassigned] [Bug 58508] New: Fix linking with Sun Studio 12: function pointers for extern "C" are treated differently

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=58508

           Summary: Fix linking with Sun Studio 12: function pointers for
                    extern "C" are treated differently
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Other
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bentaylor.solx86 at gmail.com


The Sun CC compiler treats C functions and C++ functions differently, as if they had a different calling sequence (they don't, but they
could). So if you declare a function in C++ having a function pointer as a parameter, it's understood to be C++ even if it had previously been declared as extern "C".

This could be a compiler error, though. In any case, the end result is that WebKit fails to link because of an undefined reference to
NPN_PluginThreadAsyncCall.

Problem originally identified  by Thiago Macieria in bug https://bugs.webkit.org/show_bug.cgi?id=24932 and
fixed by patch webkit17-17.diff in his suite.

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