Porting a large project using emscripten

[Guillaume Leclerc]

Hello,

I'am actually trying to port a scientific project to Javascript using emscripten.

The first part I want to achieve is to compile the dependencies. These are the dependencies of the project  :

• Boost
• Protobuf (I found this : https://github.com/invokr/protobuf-emscripten)
  
• Zlib (available in emscripten ports)
• PNG (available in emscripten ports)
• OpenSceneGraph (I found this https://github.com/Kurdakov/emscripten_OSG)
  
• Jansson (I could eventually get rid of this dependency because Javascript handles JSON natively)
• OpenDynamicsEngine
  

I have a lot of question I hope somebody has the time to answer me :

1. I compiled protobuf from https://github.com/invokr/protobuf-emscripten, The compilation was correct I think but I got this message : "ignoring dynamic library libprotoc.so because not compiling to JS or HTML, remember to link it when compiling to JS or HTML at the end". In the documentation we can read : "The file output from make might have a different suffix: .a for a static library archive, .so for a shared library". How my file can have ".so" as an extension if the tool always ignore ".so" files. How can I build the library ? Do I have to link every ".o" files ?
2. I want to build OpenSceneGraph. I saw someone already tried to port it (see https://github.com/Kurdakov/emscripten_OSG) but it seems it only work with visualstudio, and it does not say which modules are working and which are not. Do you think I should make my own port, or I can try to reuse his work ? If I have to port it myself what is the process ?
3. I managed to build OpenDynamicsEngine from source but I got an archive file. In the documentation it states that it would be better to have a .so file. Do you think a ".a" would work ?

Best regards and thanks for your help !

Guillaume Leclerc

[chronotext]

For the record:

I was able to build (via CMake) a recent (3+) version of Google protobuf for Emscripten and a few other platforms:

https://github.com/arielm/protobuf

HTH,

Ariel

[Guillaume Leclerc]

Thank you but the 2.6 version worked perfectly for me, my project was using (2.5 anyway). In the end I was able to port all these libraries and my project is now ported. If anyone needs help feel free to ask.

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