Could not open library 'clang'

[mattvague]

Not sure if this is an issue with ffi-gen or not but when I try and run ffi-gen I get the following error:

`block in ffi_lib': Could not open library 'clang': /usr/lib/clang: cannot read file data: Is a directory. (LoadError)
Could not open library 'libclang.so': libclang.so: cannot open shared object file: No such file or directory

Mind helping me out? I'm on Ubuntu and installed clang with apt-get but not sure what else i need to do to get it working.

Thanks!

[neelance]

I don't remember exactly in which package libclang.so is. You can use apt-file to find out: apt-file search libclang.so (you may need to install and update apt-file first). Also, in current Ubuntu repository is a newer version than 3.0. It might work, haven't tested. Good luck! :-)

[mvz]

On Debian, at least, there is no /usr/lib/libclang.so, only /usr/lib/llvm-3.2/lib/libclang.so.

[kernelsmith]

was libclang-dev for me

[sheerun]

We need Dockerfile for testing. There's no way all contributors need to setup dylibs first.

[mvz]

@sheerun that's a consideration for OSX, right?

[sheerun]

Not only OSX. It's not easy to get reproducible environment even on Linux.

[mvz]

In the end, ffi_gen should run on the system itself, so while a Dockerfile may streamline development (I have no experience with that), things should also work without.

[sheerun]

Yes, of course. Dockerfile is only for development.

[whitequark]

On Debian and derivatives (with recent LLVM at least), due to multilib, the file is located in /usr/lib/x86_64-linux-gnu/libclang.so.1, not only in /usr/lib/llvm-x.y/lib/libclang.so.1. Anyway, this is fixed in master.

[sheerun]

@whitequark We still need dockerfile. Can you repopen this issue or create new issue?

[whitequark]

@sheerun I don't understand the value provided by this... contributors are a small subset of users, and users will have to figure out the OS packaging anyway.

[sheerun]

So it's easier for contributors to write test cases and pull-requests regardless of OS.

e.g. I use OSX.

[sheerun]

Currently it's really hard to re-produce environment for testing.. Correct libraries, correct library versions, correct paths, correct ENV..

[whitequark]

But it's OK to require users to reproduce the environment in some other way?

[sheerun]

Is it a question? I tried really hard, but I can't reproduce tests on pure OSX.

[whitequark]

Oh... I've completely missed the fact that tests use a bunch of odd libraries. Sorry for the noise. See #31.