Building WebKit requires that you have the proper developer tools installed and that you have a copy of the WebKit source tree. Run the
build-webkit script to build WebKit. Use the
--debug option for a debug build, which includes debugging symbols and assertions:
build-webkit places build products in
WebKitBuild. You can specify a different build location on Mac in your Xcode preferences. On other platforms, the
WEBKIT_OUTPUTDIR environment variable can be used to set a different build products location. If you have set up a custom build location, then
build-webkit will place the build products there. Once your build has finished, you can run Safari using your custom WebKit build. Don’t forget that if you have any questions or problems building WebKit, feel free to get in touch!
Building on Windows requires a few more steps. For details, see http://trac.webkit.org/wiki/BuildingOnWindows.
iOS, tvOS and watchOS are all considered embedded builds. The first time after you install a new Xcode, you will need to run
--<platform>-device option, to build WebKit for your first build and all subsequent builds. Note that while simulator builds will be able to be run in the matching simulated device type, device builds of WebKit cannot be installed on embedded devices.
To set a default build configuration for
build-webkit and other scripts, use the
set-webkit-configuration --debug set-webkit-configuration --release
To build from within Xcode, you can use the WebKit workspace. Ensure that the Products and Intermediates locations for the workspace match those used by
build-webkit: choose File > Workspace Settings, then click the Advanced button, select Custom, Relative to Workspace, and enter
WebKitBuild for both Products and Intermediates. Note that if you have specified a custom build location in Xcode preferences, then you don’t need to do this.