Can't install: "error: ignoring return value of 'int sodium_init()'"

[Eugene Pakhomov]

Can't install pbdZMQ via "install.packages" or from source for R 3.3.2:

make  all-am

make[2]: Entering directory '/tmp/RtmpSBlS3F/R.INSTALL981465badf7/pbdZMQ/src/zmqsrc/src'

  CXX    libzmq_la-address.lo

  CXX    libzmq_la-clock.lo

  CXX    libzmq_la-ctx.lo

  CXX    libzmq_la-curve_client.lo

curve_client.cpp: In constructor 'zmq::curve_client_t::curve_client_t(const zmq::options_t&)':

curve_client.cpp:51:18: error: ignoring return value of 'int sodium_init()', declared with attribute warn_unused_result [-Werror=unused-result]

     sodium_init();

                  ^

cc1plus: all warnings being treated as errors

Makefile:728: recipe for target 'libzmq_la-curve_client.lo' failed

make[2]: *** [libzmq_la-curve_client.lo] Error 1

make[2]: Leaving directory '/tmp/RtmpSBlS3F/R.INSTALL981465badf7/pbdZMQ/src/zmqsrc/src'

Makefile:515: recipe for target 'all' failed

make[1]: *** [all] Error 2

make[1]: Leaving directory '/tmp/RtmpSBlS3F/R.INSTALL981465badf7/pbdZMQ/src/zmqsrc/src'

make[1]: Entering directory '/tmp/RtmpSBlS3F/R.INSTALL981465badf7/pbdZMQ/src/zmqsrc/src'

  CXX    libzmq_la-curve_client.lo

curve_client.cpp: In constructor 'zmq::curve_client_t::curve_client_t(const zmq::options_t&)':

curve_client.cpp:51:18: error: ignoring return value of 'int sodium_init()', declared with attribute warn_unused_result [-Werror=unused-result]

     sodium_init();

                  ^

cc1plus: all warnings being treated as errors

Makefile:728: recipe for target 'libzmq_la-curve_client.lo' failed

make[1]: *** [libzmq_la-curve_client.lo] Error 1

make[1]: Leaving directory '/tmp/RtmpSBlS3F/R.INSTALL981465badf7/pbdZMQ/src/zmqsrc/src'

Makevars:45: recipe for target 'libzmq' failed

make: *** [libzmq] Error 2

ERROR: compilation failed for package ‘pbdZMQ’

[Wei-Chen Chen]

FYI. https://github.com/IRkernel/IRkernel/issues/410

[Eugene Pakhomov]

I'm not using Conda for that, so the only relevant part from that topic is "your error happened during pbdZMQ installation, so you should go there for reporting it".

[Wei-Chen Chen]

I think their discussion is pretty relevant. Either take off -Wall, -Werror or set -W-no-error= ... to disable compiler where turns warning into error.

Or, use an external ZMQ library.

[Eugene Pakhomov]

1. I do not use any global configurations that I'm aware of - I couldn't find any way to make such configurations for gcc and I believe that every setting it uses is either a default one or configured within the project.
2. I did not change pbdZMQ code.

So if you suggest that I have to change the project code in order to make it work on a pretty generic system (Ubuntu 16.04.1), then I genuinely think there's something wrong with the project and not the system.

I also tried to build the same code on CentOS 7 - the same exact results.

In file "pbdZMQ/src/zmqsrc/configure.ac" you can find a line saying "# By default compiling with -Werror except OSX". Maybe the lines after that are the source of the problem, and they're the ones that should be changed?

[Wei-Chen Chen]

FYI. https://github.com/zeromq/zeromq4-1/blob/5f0a8dcffe107b668075515b3c03d921c2e24455/configure.ac#L114 That was set by the original ZMQ since 2013 ...

Thanks for more informative setup. However, I did install Xubuntu 16.04.1 and R-devel, but has no problem to make ZMQ 4.1.0 rc1 and CRAN pbdZMQ even after removing system libsodium... Can you install any ZMQ? You can either use libzmq-dev or from source, then have pbdZMQ to externally link with.

[Wei-Chen Chen]

These may be also relevant.
https://github.com/zeromq/libzmq/issues/1632
https://github.com/zeromq/libzmq/issues/1635
https://github.com/zeromq/libzmq/issues/1637
https://github.com/zeromq/libzmq/commit/479db2113643e459c11db392e0fefd6400657c9e

I will change accordingly to pbdZMQ 0.2-5, but I can not test it because I can not reproduce the errors.

[Wei-Chen Chen]

Please check if the patch works at https://github.com/snoweye/pbdZMQ . Thanks.

[Eugene Pakhomov]

It works, thank you!