[webkit-dev] Thought about Nix JavaScriptCore port

Filip Pizlo fpizlo at apple.com
Tue Nov 10 23:15:37 PST 2015

I like this idea. It makes sense to simplify building JSC as a standalone on Linux. 


> On Nov 10, 2015, at 11:04 PM, Yusuke SUZUKI <utatane.tea at gmail.com> wrote:
> Hello WebKittens,
> JavaScriptCore use in non-OSX environment looks emerging[1].
> In addition to that, sometimes, people would like to build JavaScriptCore to see what is happning in JavaScriptCore development[2].
> However, if you don't have an OSX machine, it is a little bit difficult.
> One possible solution is GTK+ port, it is nice way to build JSC in Linux.
> But it involves many dependencies (Mesa, glib etc.), that are not necessary for JavaScriptCore and this is a barrier to join JSC development from non OSX world.
> While building whole WebKit requires many dependencies, JavaScriptCore does not.
> In Nix environment, JavaScriptCore only requires
> 1. ICU (for WTF unicode libraries and i18n in JSC)
> 2. LLVM (for FTL!)
> That's all. Maintaining the brand new port is tough work.
> But maintaining Nix port only for JSC is much much easier since WTF and JSC are well written for Nix.
> In fact, I can build JSC in Nix environment with very small effort, essentially just adding CMakeLists.txt. Here is my initial attempt[2].
> So, the proposal is, how about adding new port NixJSC?
> I think it encourages OSS development for JSC.
> Unfortunately I cannot attend Fall WebKit MTG, but this could become a nice topic for the MTG :)
> Here is the plan about the NixJSC port.
> 1. Add new port NixJSC. It provides JavaScriptCore build for Nix environment. Not provide WebCore, WebKit, WebKit2, etc. It will just build WTF, bmalloc, and JSC.
> 2. This port should be suitable for development. So I think aggressively enabling features is nice for this port; like, enabling FTL!
> 3. I think this would become a nice playground for OSX guys to enable features in Nix environment. GTK+ and EFL are somewhat production port. But NixJSC is intended to be used for development.
> If it is introduced, at least, I can support this port.
> [1]: https://github.com/facebook/react-native/blob/master/ReactAndroid/src/main/jni/third-party/jsc/Android.mk
> [2]: https://twitter.com/BrendanEich/status/652108576836743168
> [3]: https://github.com/Constellation/webkit/commit/a2908e97939ea2881e15ba2d820c377f9bd09297
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