[Webkit-unassigned] [Bug 24653] New: WebKit should be buildable without prefix header injection

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=24653

           Summary: WebKit should be buildable without prefix header
                    injection
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mark at chromium.org
                CC: eric at webkit.org, dglazkov at chromium.org


For the Chromium Mac build, I'm working on a system to speed along our sluggish
buildbot-driven continuous builds.  This system involves using distcc in pump
mode to distribute the compilation to a number of systems, some of which are
not even Macs.  (They're running Linux and have a full Apple cross-toolchain.)

distcc's pump mode is not compatible with prefix header injection ("gcc
-include" or the GCC_PREFIX_HEADER Xcode setting.)

The WebCore Mac build is currently dependent on prefix header injection.  It
precompiles WebCorePrefix.h.  It seems that Mac-specific parts of WebCore are
the only parts that actually rely on a prefix header; all of the
platform-independent bits build without prefix header injection.

The Chromium Mac build still builds some Mac files from WebCore.

In order to get everything to work properly with my new distcc setup, I need to
make WebCore buildable without prefix header injection, even on the Mac.  To be
clear, I am not eliminating the ability to build with a [precompiled] prefix
header.  I'm merely adding the #includes and forward declarations that are
needed to make the Mac-specific portions of WebCore used by Chromium build when
the prefix header is not in use.

Further reading on distcc's pump mode:
http://google-opensource.blogspot.com/2008/08/distccs-pump-mode-new-design-for.html
.


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