Can't build as a library

[alejandro-isaza]

If you build Caffe as a library (either static or dynamic) it fails to register the layers: Unknown layer type: Convolution (known types: ). Related: #2159

[alejandro-isaza]

Some more info:

• http://stackoverflow.com/questions/9459980/c-global-variable-not-initialized-when-linked-through-static-libraries-but-ok
• http://stackoverflow.com/questions/5202142/static-variable-initialization-over-a-library

[SlimeQ]

I've been trying to get caffe installed as a c++ library for a few days now with no luck. I'll admit that I barely know what I'm doing when it comes to c++/make/cmake but the documentation is pretty weak. from what I can tell it has to do with incorrect installation of the dependencies, but I haven't found any clear instructions on how to do this correctly, and there are SO MANY DEPENDENCIES. Attempts at manual installation of all of them has left my AWS instance a mess and totally filled my 8gb of storage. I can only assume I'm doing something terribly wrong but I'm at a loss as to what. It's worth noting that the python wrapper works fine... this does not add up in my head.

any thoughts?

edit: I've basically just been trying to compile the cpp_classification example using

$ g++ cpp_classification.cpp

[flx42]

With a shared library it should just work.
For a static library, use -Wl,--whole-archive libcaffe.a -Wl,--no-whole-archive

[shelhamer]

Right. The Makefile is designed to handle the layer registry in this way by https://github.com/BVLC/caffe/blob/master/Makefile#L269-L273.

[flx42]

@Aleph7 please double check if it works with a shared library, if it doesn't then it's a bug.
Otherwise, we can close this issue I think.

[alejandro-isaza]

I'll give it a try, thanks

[alejandro-isaza]

The static lib flags worked, thanks again.

[carlosost]

Hello @flx42 Could you help me with this problem here ?