[Webkit-unassigned] [Bug 183811] New: [WPE] Build failure with ENABLE_VIDEO=OFF when GStreamer is not available

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=183811

            Bug ID: 183811
           Summary: [WPE] Build failure with ENABLE_VIDEO=OFF when
                    GStreamer is not available
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit WPE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: clopez at igalia.com
                CC: aperez at igalia.com, bugs-noreply at webkitgtk.org,
                    pnormand at igalia.com

Building WPE with video disabled currently fails if gstreamer is not avaialable (which its expected it won't be if the system doesn't need video).
I think this started to happen with r228946 <https://trac.webkit.org/r228946> due to the unconditional inclusion of WebCore/GStreamerUtilities.h which is not guarded by USE(GSTREAMER)

The build failure itself:

In file included from /home/igalia/clopez/build-wpe-trunk/buildroot-2017.08.2/output/build/wpewebkit-custom/DerivedSources/ForwardingHeaders/WebCore/GStreamerUtilities.h:1:0,
                 from /home/igalia/clopez/build-wpe-trunk/buildroot-2017.08.2/output/build/wpewebkit-custom/Source/WebKit/UIProcess/wpe/WebProcessPoolWPE.cpp:39,
                 from /home/igalia/clopez/build-wpe-trunk/buildroot-2017.08.2/output/build/wpewebkit-custom/DerivedSources/WebKit/unified-sources/UnifiedSource36.cpp:6:
/home/igalia/clopez/build-wpe-trunk/buildroot-2017.08.2/output/build/wpewebkit-custom/Source/WebCore/platform/graphics/gstreamer/GStreamerUtilities.h:24:21: fatal error: gst/gst.h: No such file or directory
compilation terminated.
Source/WebKit/CMakeFiles/WebKit.dir/build.make:16176: recipe for target 'Source/WebKit/CMakeFiles/WebKit.dir/__/__/DerivedSources/WebKit/unified-sources/UnifiedSource36.cpp.o' failed

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