<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi everyone,<div><br></div><div>I’m new on this mailing so I’ll start by introducing myself:</div><div>My name Jacques-Olivier Haché (J-O), I’m working for Temasys Communication, and I’m entering the WebKit project to work on the implementation of WebRTC inside WebKit.</div><div>For those who would be following the WebRTC’s news, I’m also the main developer of the WebRTC plugin released by Temasys.</div><div><br></div><div>Back to business:</div><div><br></div><div>I was able to download the project, build it and run it inside Safari. I did not try to run it in a different browser yet.</div><div><br></div><div>My configuration:</div><div><ul><li>Macbook Air 2012</li><li>Mac OS X 10.9.4</li><li>Revision 171167</li><li>I’m on master</li><li>I suppose I’m using the regular Mac port as I didn’t see where to change from one port to another yet.</li><li>building for debug mode</li></ul></div><div>I am now trying to enable the WebRTC related features to get a better understanding of the current state of this part of the project. </div><div>I have to say that I faced a lack of documentation on this area. I found the <a href="https://trac.webkit.org/wiki/FeatureFlags">features list</a>, a document about <a href="https://trac.webkit.org/wiki/AddingFeatures">how to add a new feature</a> but nothing about how to turn a feature on and off (there is actually a TODO about that in the second link).</div><div><br></div><div>I looked into the files that one needs to change to add a new feature and found two interesting files:</div><div><ul><li><span style="background-color: rgb(255, 255, 255);">Source/WTF/wtf/FeatureDefines.h - where the WebRTC related contants were set to 0 instead of 1</span></li><li>Source/cmake/WebKitFeatures.cmake - where the contants were set to OFF</li></ul></div><div>I listed the following definitions that look related to WebRTC</div><div><ul><li>ENABLE_MEDIA_CAPTURE</li><li>ENABLE_MEDIA_CONTROLS_SCRIPT</li><li>ENABLE_MEDIA_SOURCE</li><li>ENABLE_MEDIA_STATISTICS</li><li>ENABLE_MEDIA_STREAM</li><li>ENABLE_VIDEO</li><li>ENABLE_VIDEO_TRACK</li></ul></div><div>I turned those definitions to 1 and ON in the respective file and tried to build.</div><div>The code in the header WebCore/Modules/mediastream/mediastream.h could not compile apparently because the observer did not have a destructor. I created one:</div><div><div> class Observer {</div><div> public:</div><div> virtual void didAddOrRemoveTrack() = 0;</div><div> virtual ~Observer() {};</div><div> };</div></div><div><br></div><div>and tried to build again.<br><br></div><div>I now have a linking error that I do not understand when building WebCore with Xcode. </div><div><br></div><div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;">Ld /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore normal x86_64</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> cd /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/Source/WebCore</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> export MACOSX_DEPLOYMENT_TARGET=10.9</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -dynamiclib -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -L/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug -F/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug -filelist /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCore.build/Objects-normal/x86_64/WebCore.LinkFileList -Xlinker --no-demangle -exported_symbols_list /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/DerivedSources/WebCore/WebCore.LP64.exp -install_name /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/Versions/A/WebCore -mmacosx-version-min=10.9 -lsqlite3 -lobjc -lANGLE -sub_library libobjc -umbrella WebKit -allowable_client WebCoreTestSupport -allowable_client WebKit2 -allowable_client WebKitLegacy -framework ApplicationServices -framework AudioUnit -framework Carbon -framework Cocoa -framework IOSurface -framework OpenGL -stdlib=libc++ -fobjc-link-runtime -framework Accelerate -framework AudioToolbox -framework CoreAudio -framework IOKit -framework JavaScriptCore -licucore -lobjc -lxml2 -lz -framework QuartzCore -framework Security -framework SystemConfiguration -single_module -compatibility_version 1 -current_version 600.1 -Xlinker -dependency_info -Xlinker /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCore.build/Objects-normal/x86_64/WebCore_dependency_info.dat -o /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/WebCore.framework/Versions/A/WebCore</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo; min-height: 13px;"><br></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;">Undefined symbols for architecture x86_64:</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> "__ZN7WebCore11JSNavigator18webkitGetUserMediaEPN3JSC9ExecStateE", referenced from:</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> __ZN7WebCore46jsNavigatorPrototypeFunctionWebkitGetUserMediaEPN3JSC9ExecStateE in JSNavigator.o</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> "__ZN7WebCore15RTCOfferOptions6createERKNS_10DictionaryERi", referenced from:</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> __ZN7WebCore17RTCPeerConnection11createOfferEN3WTF10PassRefPtrINS_29RTCSessionDescriptionCallbackEEENS2_INS_30RTCPeerConnectionErrorCallbackEEERKNS_10DictionaryERi in RTCPeerConnection.o</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> "__ZN7WebCore20MediaConstraintsMock17verifyConstraintsEN3WTF10PassRefPtrINS_16MediaConstraintsEEE", referenced from:</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> __ZN7WebCore21MockMediaStreamCenter26validateRequestConstraintsEN3WTF10PassRefPtrINS_25MediaStreamCreationClientEEENS2_INS_16MediaConstraintsEEES6_ in MockMediaStreamCenter.o</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> __ZN7WebCore21MockMediaStreamCenter17createMediaStreamEN3WTF10PassRefPtrINS_25MediaStreamCreationClientEEENS2_INS_16MediaConstraintsEEES6_ in MockMediaStreamCenter.o</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> "__ZN7WebCore21RTCOfferAnswerOptions6createERKNS_10DictionaryERi", referenced from:</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> __ZN7WebCore17RTCPeerConnection12createAnswerEN3WTF10PassRefPtrINS_29RTCSessionDescriptionCallbackEEENS2_INS_30RTCPeerConnectionErrorCallbackEEERKNS_10DictionaryERi in RTCPeerConnection.o</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> "__ZN7WebCore4toJSEPN3JSC9ExecStateEPNS_17JSDOMGlobalObjectEPNS_16RTCConfigurationE", referenced from:</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;"> __ZN7WebCore52jsRTCPeerConnectionPrototypeFunctionGetConfigurationEPN3JSC9ExecStateE in JSRTCPeerConnection.o</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;">ld: symbol(s) not found for architecture x86_64</div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; font-family: Menlo;">clang: error: linker command failed with exit code 1 (use -v to see invocation)</div></div><div><div><br class="webkit-block-placeholder"></div><div>I found reference to these objects in WebKitBuild/Debug/DerivedSources/WebCore/WebCore.exp, but I think it only means that the class is expected, which I already know from the stack.</div><div><br></div><div>I build with build-webkit, I get a different stack: (the complete stack is attache to this email, 4MB…)</div><div><br></div><div><br></div><div><div>=== BUILD TARGET WebCoreExportFileGenerator OF PROJECT WebCore WITH CONFIGURATION Debug ===</div><div><br></div><div>Check dependencies</div><div>iOS.xcconfig line 1: Unable to find included file "<DEVELOPER_DIR>/AppleInternal/XcodeConfig/AspenFamily.xcconfig"</div><div>Base.xcconfig line 24: Unable to find included file "../../../../Internal/Configurations/UseInternalSDK.xcconfig"</div><div><br></div><div>CompileC /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/Objects-normal/x86_64/ExportFileGenerator.o /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/DerivedSources/WebCore/ExportFileGenerator.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler</div><div> cd /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/Source/WebCore</div><div> export LANG=en_US.US-ASCII</div><div> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c++ -arch x86_64 -fmessage-length=204 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -fcolor-diagnostics -std=gnu++11 -stdlib=libc++ -Wno-trigraphs -fno-exceptions -fno-rtti -fpascal-strings -O0 -Werror -Wno-missing-field-initializers -Wmissing-prototypes -Wnon-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wno-missing-braces -Wparentheses -Wswitch -Wunused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wbool-conversion -Wenum-conversion -Wsign-compare -Wno-shorten-64-to-32 -Wnewline-eof -Wno-c++11-extensions -DDISABLE_THREAD_CHECK -DENABLE_3D_RENDERING -DENABLE_CACHE_PARTITIONING -DENABLE_CANVAS_PATH -DENABLE_CHANNEL_MESSAGING -DENABLE_CSS_BOX_DECORATION_BREAK -DENABLE_CSS_COMPOSITING -DENABLE_CSS_EXCLUSIONS -DENABLE_CSS_FILTERS -DENABLE_CSS_GRID_LAYOUT -DENABLE_CSS_REGIONS -DENABLE_CSS_SHAPES -DENABLE_CSS_TRANSFORMS_ANIMATIONS_UNPREFIXED -DENABLE_CSS3_CONDITIONAL_RULES -DENABLE_CURSOR_VISIBILITY -DENABLE_DASHBOARD_SUPPORT -DENABLE_DETAILS_ELEMENT -DENABLE_DOM4_EVENTS_CONSTRUCTOR -DENABLE_ENCRYPTED_MEDIA -DENABLE_ENCRYPTED_MEDIA_V2 -DENABLE_FILTERS -DENABLE_FULLSCREEN_API -DENABLE_GAMEPAD -DENABLE_GEOLOCATION -DENABLE_HIDDEN_PAGE_DOM_TIMER_THROTTLING -DENABLE_ICONDATABASE -DENABLE_INDEXED_DATABASE -DENABLE_INDIE_UI -DENABLE_INPUT_TYPE_COLOR -DENABLE_INPUT_TYPE_COLOR_POPOVER -DENABLE_INSPECTOR -DENABLE_LEGACY_CSS_VENDOR_PREFIXES -DENABLE_LEGACY_NOTIFICATIONS -DENABLE_LEGACY_VENDOR_PREFIXES -DENABLE_LEGACY_WEB_AUDIO -DENABLE_MATHML -DENABLE_MEDIA_CONTROLS_SCRIPT -DENABLE_METER_ELEMENT -DENABLE_MOUSE_CURSOR_SCALE -DENABLE_NAVIGATOR_CONTENT_UTILS -DENABLE_NAVIGATOR_HWCONCURRENCY -DENABLE_NOTIFICATIONS -DENABLE_PDFKIT_PLUGIN -DENABLE_PROMISES -DENABLE_PUBLIC_SUFFIX_LIST -DENABLE_REQUEST_ANIMATION_FRAME -DENABLE_SHARED_WORKERS -DENABLE_SPEECH_SYNTHESIS -DENABLE_SQL_DATABASE -DENABLE_SUBPIXEL_LAYOUT -DENABLE_SUBTLE_CRYPTO -DENABLE_SVG_FONTS -DENABLE_TEMPLATE_ELEMENT -DENABLE_USERSELECT_ALL -DENABLE_VIDEO -DENABLE_VIDEO_TRACK -DENABLE_DATACUE_VALUE -DENABLE_WEBGL -DENABLE_WEB_AUDIO -DENABLE_WEB_REPLAY -DENABLE_WEB_SOCKETS -DENABLE_PICTURE_SIZES -DENABLE_WEBVTT_REGIONS -DENABLE_XHR_TIMEOUT -DENABLE_XSLT -DENABLE_FTL_JIT -DWEBKIT_VERSION_MIN_REQUIRED=WEBKIT_VERSION_LATEST -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -mmacosx-version-min=10.9 -g -fvisibility=hidden -fvisibility-inlines-hidden -fno-threadsafe-statics -Wno-sign-conversion -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/WebCoreExportFileGenerator.hmap -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/include -IForwardingHeaders -Iicu -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxslt -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2 -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/DerivedSources/WebCore -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/usr/local/include -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/usr/local/include/WebKitAdditions -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/local/include/WebKitAdditions -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/DerivedSources/x86_64 -I/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/DerivedSources -Wall -Wextra -Wcast-qual -Wchar-subscripts -Wextra-tokens -Wformat=2 -Winit-self -Wmissing-format-attribute -Wmissing-noreturn -Wpacked -Wpointer-arith -Wredundant-decls -Wundef -Wwrite-strings -Wexit-time-destructors -Wglobal-constructors -Wtautological-compare -Wimplicit-fallthrough -F/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug -include /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/PrecompiledHeaders/WebCorePrefix-gcoyowpevvvzkbecqfhdngvxbkag/WebCorePrefix.h -MMD -MT dependencies -MF /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/Objects-normal/x86_64/ExportFileGenerator.d --serialize-diagnostics /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/Objects-normal/x86_64/ExportFileGenerator.dia -c /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/DerivedSources/WebCore/ExportFileGenerator.cpp -o /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/Objects-normal/x86_64/ExportFileGenerator.o</div><div>fatal error: file '/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/usr/local/include/wtf/FeatureDefines.h' has been modified since the precompiled header</div><div> '/Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/PrecompiledHeaders/WebCorePrefix-gcoyowpevvvzkbecqfhdngvxbkag/WebCorePrefix.h.pch' was built</div><div>1 error generated.</div><div><br></div><div>** BUILD FAILED **</div></div><div><br></div><div><div><br></div><div>The following build commands failed:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>CompileC /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/WebCore.build/Debug/WebCoreExportFileGenerator.build/Objects-normal/x86_64/ExportFileGenerator.o /Users/jacquesolivierhache/Workspace/Temasys/WebKitProject/WebKit/WebKitBuild/Debug/DerivedSources/WebCore/ExportFileGenerator.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler</div><div>(1 failure)</div></div><div><br></div><div><br></div><div apple-content-edited="true"><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Is anyone used to turn the WebRTC code on and off?</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Did I miss an important step?</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Do you understand these errors?</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Why do I end up with different errors with Xcode than with the script? Isn’t the script using LLVM?</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Why is the precompiled header not re-built when there are changes in the headers?</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Thanks in advance.</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"></div></div></div></body></html>