[Webkit-unassigned] [Bug 76476] Build failure on Snow Leopard i386: implicit conversion warnings

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=76476





--- Comment #3 from opendarwin at lapcatsoftware.com  2012-06-27 12:51:59 PST ---
I found something interesting. If I build i386 with Xcode 4.2 on Snow Leopard instead of Xcode 3.2.6, it succeeds, but I can see in the build transcript that it's using "-Wno-shorten-64-to-32", whereas you can see in my transcript above that it used -Wshorten-64-to-32 with Xcode 3.2.6.

I did a search of the WebKit project and found the xcconfig file:

https://trac.webkit.org/browser/trunk/Source/JavaScriptCore/Configurations/Base.xcconfig

67    WARNING_CFLAGS_macosx = $(WARNING_CFLAGS_macosx_$(CURRENT_ARCH));
68    WARNING_CFLAGS_macosx_ = $(WARNING_CFLAGS_BASE) -Wshorten-64-to-32;
69    WARNING_CFLAGS_macosx_i386 = $(WARNING_CFLAGS_BASE) -Wshorten-64-to-32;
70    WARNING_CFLAGS_macosx_ppc = $(WARNING_CFLAGS_BASE) -Wshorten-64-to-32;
71    // FIXME: JavaScriptCore 64-bit builds should build with -Wshorten-64-to-32
72    WARNING_CFLAGS_macosx_ppc64 = $(WARNING_CFLAGS_BASE);
73    WARNING_CFLAGS_macosx_x86_64 = $(WARNING_CFLAGS_BASE);

Notice the FIXME comment. If I add -Wshorten-64-to-32 to line 73, then the build fails even with Xcode 4.2.

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