Provide libembedding library in pre-built nightly snapshots

[vsimon]

Since servo is a browser engine being developed for application and embedded use, it would be nice if the nightly builds included the library for embedded use as well. (I believe it is called libembedding.so on linux for example)
Was looking here: https://servo-builds.s3.amazonaws.com/index.html

[metajack]

I think this is a fine idea, but we should probably have some simple client to test that it works first.

[zmike]

Define "simple"

[metajack]

A C program that links to libembedding and calls the simplest function provided. This would ensure we are at least linkable. Obviously more testing is better, but we have to start somewhere.

[zmike]

See #4024

[nox]

@jdm @metajack Is this something we should be working on? Should we close the issue?

[metajack]

We need to rewrite the CEF bindings on top of libservo, if @paulrouget hasn't done that already. And then we'd ship a .so that implemented the CEF API.

[paulrouget]

CEF has been updated to comply to all the changes we made to libservo.
I haven't tested if it still works. It compiles though.

[gzunino]

I would be great if there is a servo .so for embedding as a drop in replacement for CEF (chromium). There are many projects out there using CEF which could start testing it. Me (https://github.com/maketechnology/cefswt) being one.

[paulrouget]

In theory, ./mach build-cef does that.

[gzunino]

How can I know which version of CEF api is implemented by embedding servo ?

I built libembedding.so and tried to use it as drop-in replacement for libcef.so in a simple app targeting CEF 3.3071.1649.g98725e6.

ldd shows all resolved, but I at runtime I get:

undefined symbol: cef_string_userfree_utf8_alloc from my .so which is linked against libcef.so

Although the function is implemented

servo/ports/cef/string.rs

Line 79 in 234951e

pub extern "C" fn cef_string_userfree_utf8_alloc() -> *mut cef_string_utf8_t {

Any idea?