38054 2010-04-23 12:03:13 -0700 [Qt] Build dependency problems 2011-09-07 05:46:53 -0700 1 1 1 Unclassified WebKit Tools / Tests 528+ (Nightly build) PC All RESOLVED FIXED Qt, QtTriaged P1 Blocker --- 67646 67706 1 laszlo.gombos webkit-unassigned hausmann jturcotte laszlo.gombos maheshk ossy oldest_to_newest 216500 0 laszlo.gombos 2010-04-23 12:03:13 -0700 The extend of the problem is not well understood, but we have frequent false breaks on the minimal bot. For example r58178 cased the following failure: make[1]: Leaving directory `/home/webkitbuildbot/slaves/release32bitMinimal/buildslave/qt-linux-release-minimal/build/WebKitBuild/Release/JavaScriptCore' cd WebCore/ && make -f Makefile make[1]: Entering directory `/home/webkitbuildbot/slaves/release32bitMinimal/buildslave/qt-linux-release-minimal/build/WebKitBuild/Release/WebCore' rm -f libQtWebKit.so.4.6.2 libQtWebKit.so libQtWebKit.so.4 libQtWebKit.so.4.6 [...] /release/PluginPackageNone.o: In function `WebCore::PluginPackage::determineQuirks(WebCore::String const&)': PluginPackageNone.cpp:(.text._ZN7WebCore13PluginPackage15determineQuirksERKNS_6StringE+0x0): multiple definition of `WebCore::PluginPackage::determineQuirks(WebCore::String const&)' obj/release/PluginPackage.o:PluginPackage.cpp:(.text._ZN7WebCore13PluginPackage15determineQuirksERKNS_6StringE+0x0): first defined here obj/release/PluginView.o: In function `WebCore::PluginView::handleEvent(WebCore::Event*)': PluginView.cpp:(.text._ZN7WebCore10PluginView11handleEventEPNS_5EventE+0xb1): undefined reference to `WebCore::PluginView::handleFocusInEvent()' PluginView.cpp:(.text._ZN7WebCore10PluginView11handleEventEPNS_5EventE+0xe9): undefined reference to `WebCore::PluginView::handleFocusOutEvent()' obj/release/PluginView.o: In function `WebCore::PluginView::stop()': PluginView.cpp:(.text._ZN7WebCore10PluginView4stopEv+0x3cd): undefined reference to `NPN_MemFree' PluginView.cpp:(.text._ZN7WebCore10PluginView4stopEv+0x3d8): undefined reference to `NPN_MemFree' collect2: ld returned 1 exit status make[1]: *** [../lib/libQtWebKit.so.4.6.2] Error 1 make[1]: Leaving directory `/home/webkitbuildbot/slaves/release32bitMinimal/buildslave/qt-linux-release-minimal/build/WebKitBuild/Release/WebCore' Link to the full buildlog: http://build.webkit.org/builders/Qt%20Linux%20Release%20minimal/builds/582/steps/compile-webkit/logs/stdio The list of DEFINES has changed (as WebCore.pri has changed) but none of the source files has been rebuilt. As a top gap measure maybe we can make all WebCore files dependent on WebCore.pri, WebCore.pro, WebKit.pri ? 221588 1 jturcotte 2010-05-06 02:14:56 -0700 (In reply to comment #0) > The list of DEFINES has changed (as WebCore.pri has changed) but none of the > source files has been rebuilt. As a top gap measure maybe we can make all > WebCore files dependent on WebCore.pri, WebCore.pro, WebKit.pri ? The problem is that this will trigger an almost full rebuild each time one of these files will change, and 95% of the times the change is not related to preprocessor input data. I don't know how much less efficient the build bot would be, it looks like at least one of these files get modified around once or twice a day. It might be not that bad. 266304 2 ossy 2010-08-18 12:15:19 -0700 One more false positive alarm because of this bug. :/ See https://bugs.webkit.org/show_bug.cgi?id=42027 (comment25,26) 266512 3 maheshk 2010-08-18 19:18:08 -0700 How about checking for 'DEFINES +=' in any *.pri or *.pro? If found trigger a clean build or else normal? 421911 4 ossy 2011-06-16 05:07:56 -0700 Moidifying it to P1/blocker. It is so annoying bug in our build system. :-S https://bugs.webkit.org/attachment.cgi?id=97432 in https://bugs.webkit.org/show_bug.cgi?id=59085 killed our EWS, and I have no idea how to fix it ... +} else { + # We have to disable SVG Fonts, which rely on the fast path. + DEFINES -= ENABLE_SVG_FONTS=1 + DEFINES += ENABLE_SVG_FONTS=0 When EWS try to build the patch, this change doesn't trigger rebuilding all source contains ENABLE_SVG_FONTS defines. It cause an inconsistent state in WebKitBuild. :-/ 422089 5 ossy 2011-06-16 11:16:52 -0700 A typical example what happens if Qt EWS doesn't work because of this crazy bug: https://bugs.webkit.org/show_bug.cgi?id=62748 442188 6 ossy 2011-07-26 05:37:27 -0700 One more problem because of this bug: https://bugs.webkit.org/show_bug.cgi?id=63472 442245 7 jturcotte 2011-07-26 07:43:10 -0700 I think that adding all the .pro and .pri files to the dependency of each .o file would be less annoying for the bots, but extremely more annoying for developers (adding or removing any line to i.e. SOURCES or HEADERS in those files will trigger a full rebuild on their machine). The "cleanest" solution I would see is to centralize the DEFINES modifications in one file (called config.pri or something) and make that file a dependency for every copiled .o There is also no way I know of with qmake to add an additional dependency to all object files, so we might have to hack some QMAKE_EXTRA_TARGETS that would depend on this file and do something like touching all config.h files That's hacky, ugly, probably going to be another thing making this build system a burden and I personally prefer it the way it is right now, but that's because I'm not the one that has to reset those bots each time an incremental build isn't possible. To explore other solutions, how often are those bots failing in normal cases? What would be the cost of automatically forcing a clean build when an incremental build failed? Something like: build-webkit --qt || (rm -rf $WEBKITOUTPUTDIR ; build-webkit --qt) 442253 8 jturcotte 2011-07-26 07:52:36 -0700 Another idea would be to stop using command line defines and have instead a DerivedSources generator that would create an header file with defines instead (like ENABLE* and USE*). This header could be included in each config.h within a PLATFORM(QT) block. More complex defines logic should be in static headers to be handled by the preprocessor instead of qmake. 460330 9 105925 kkristof 2011-09-01 02:00:15 -0700 Created attachment 105925 proposed fix 460342 10 105925 jturcotte 2011-09-01 02:32:23 -0700 Comment on attachment 105925 proposed fix Looks like this should fix it, simple and efficient! One thing that should be changed is to move the CONFIG(compute_defaults) { } part in Source/WebCore/features.pri to the end of the file and a comment should be added to say that nothing should be placed after it. For example right now, since ENABLE_XHTMLMP is defined after the compute_defaults part, changing it won't trigger a clean build. Beside this it LGTM. 460347 11 ossy 2011-09-01 02:46:29 -0700 Great work. I agree with Jocelyn, it would be good if you move CONFIG(compute_defaults) {...} to the end of features.pri with a comment. Please upload a new patch with this fix and I'll review it. 460366 12 105935 kkristof 2011-09-01 03:48:36 -0700 Created attachment 105935 proposed fix 460386 13 105935 ossy 2011-09-01 05:17:10 -0700 Comment on attachment 105935 proposed fix View in context: https://bugs.webkit.org/attachment.cgi?id=105935&action=review LGTM, r=me. > Source/WebCore/features.pri:266 > +# Nothing place after this! "Don't place anything after this!" would be better 460387 14 ossy 2011-09-01 05:24:03 -0700 Landed in http://trac.webkit.org/changeset/94288 461156 15 ossy 2011-09-02 04:36:20 -0700 (In reply to comment #14) > Landed in http://trac.webkit.org/changeset/94288 And a trivial fix landed in http://trac.webkit.org/changeset/94407 105925 2011-09-01 02:00:15 -0700 2011-09-01 03:48:36 -0700 proposed fix 1.patch text/plain 2071 kkristof ZGlmZiAtLWdpdCBhL1Rvb2xzL0NoYW5nZUxvZyBiL1Rvb2xzL0NoYW5nZUxvZwppbmRleCA3NmFh MjcyLi5kNmNjOWE5IDEwMDY0NAotLS0gYS9Ub29scy9DaGFuZ2VMb2cKKysrIGIvVG9vbHMvQ2hh bmdlTG9nCkBAIC0xLDMgKzEsMTUgQEAKKzIwMTEtMDktMDEgIEtyaXN0w7NmIEtvc3p0ecOzICA8 a2tyaXN0b2ZAaW5mLnUtc3plZ2VkLmh1PgorCisgICAgICAgIFtRdF0gQnVpbGQgZGVwZW5kZW5j eSBwcm9ibGVtcworICAgICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/ aWQ9MzgwNTQKKworICAgICAgICBNYWtlIGNsZWFuIGJ1aWxkIGFmdGVyIHRoZSBkZWZpbmVzIGFy ZSBjaGFuZ2VkLgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAg 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