| Summary: | New build system causing full WebCore recompiles | ||||||
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| Product: | WebKit | Reporter: | Kenneth Russell <kbr> | ||||
| Component: | Tools / Tests | Assignee: | Keith Rollin <krollin> | ||||
| Status: | RESOLVED DUPLICATE | ||||||
| Severity: | Major | CC: | dino, krollin, webkit-bug-importer | ||||
| Priority: | P2 | Keywords: | InRadar | ||||
| Version: | WebKit Nightly Build | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Bug Depends on: | 199212, 209890, 212428, 212530, 212623 | ||||||
| Bug Blocks: | |||||||
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Note: I might have broken something in Bug 212428. Undoing my change to WebKit.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings from Bug 212428, touching a file in Source/ThirdParty/ANGLE and running: ./Tools/Scripts/build-webkit --debug --ios-simulator still does a huge rebuild of lots of JavaScriptCore, WebCore, and WebKit. Incremental builds aren't working any more in WebKit. The switch to XCBuild was reverted in Bug 212530 so reducing the priority to P2, Major. Keith, may I assign this to you to follow up on later? I can help fix ANGLE so that it doesn't regenerate its headers all the time (originally fixed in Bug 199212, but seems it will need a new solution that doesn't generate a timestamp but is instead based on the file's contents). *** This bug has been marked as a duplicate of bug 217371 *** |
Created attachment 400403 [details] zip archive of build output After the switch to the new build system, touching a single .cc file in for example Source/ThirdParty/ANGLE and running: ./Tools/Scripts/build-webkit --release --ios-simulator > build-log.txt 2>&1 seems to cause some timestamp in JavaScriptCore to be modified, causing headers to be regenerated, and a lot of WebCore to be rebuilt. Attached is the (aborted) output after touching Source/ThirdParty/ANGLE/src/libANGLE/formatutils.cpp and running that command. (WebKit was completely built in this configuration before touching that file and attempting a rebuild.) This drastically increases incremental build times and basically destroys our ability to contribute to WebKit. Can this regression please be investigated?