Installation fails...

[Altonymous]

checking for zmq.h... yes
checking for zmq_init() in -lzmq... yes
Cool, I found your zmq install...
creating Makefile

make
compiling rbzmq.c
rbzmq.c: In function ‘context_initialize’:
rbzmq.c:126: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘poll_add_item’:
rbzmq.c:219: warning: ISO C90 forbids mixed declarations and code
rbzmq.c:232: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘internal_select’:
rbzmq.c:338: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘module_select’:
rbzmq.c:388: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘context_socket’:
rbzmq.c:431: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘socket_getsockopt’:
rbzmq.c:968: error: ‘ZMQ_RECOVERY_IVL_MSEC’ undeclared (first use in this function)
rbzmq.c:968: error: (Each undeclared identifier is reported only once
rbzmq.c:968: error: for each function it appears in.)
rbzmq.c:990: error: ‘ZMQ_HWM’ undeclared (first use in this function)
rbzmq.c:991: error: ‘ZMQ_SWAP’ undeclared (first use in this function)
rbzmq.c:995: error: ‘ZMQ_MCAST_LOOP’ undeclared (first use in this function)
rbzmq.c: In function ‘socket_setsockopt’:
rbzmq.c:1292: error: ‘ZMQ_HWM’ undeclared (first use in this function)
rbzmq.c:1293: error: ‘ZMQ_SWAP’ undeclared (first use in this function)
rbzmq.c:1297: error: ‘ZMQ_MCAST_LOOP’ undeclared (first use in this function)
rbzmq.c:1315: error: ‘ZMQ_RECOVERY_IVL_MSEC’ undeclared (first use in this function)
rbzmq.c: In function ‘socket_bind’:
rbzmq.c:1379: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘socket_connect’:
rbzmq.c:1422: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘zmq_send_blocking’:
rbzmq.c:1443: error: too few arguments to function ‘zmq_send’
rbzmq.c: In function ‘socket_send’:
rbzmq.c:1490: warning: ISO C90 forbids mixed declarations and code
rbzmq.c:1496: warning: ISO C90 forbids mixed declarations and code
rbzmq.c:1517: error: too few arguments to function ‘zmq_send’
rbzmq.c: In function ‘zmq_recv_blocking’:
rbzmq.c:1541: error: too few arguments to function ‘zmq_recv’
rbzmq.c: In function ‘socket_recv’:
rbzmq.c:1580: warning: ISO C90 forbids mixed declarations and code
rbzmq.c:1584: warning: ISO C90 forbids mixed declarations and code
rbzmq.c:1602: error: too few arguments to function ‘zmq_recv’
rbzmq.c:1616: warning: ISO C90 forbids mixed declarations and code
rbzmq.c: In function ‘Init_zmq’:
rbzmq.c:1658: warning: ISO C90 forbids mixed declarations and code
rbzmq.c:1675: error: ‘ZMQ_HWM’ undeclared (first use in this function)
rbzmq.c:1676: error: ‘ZMQ_SWAP’ undeclared (first use in this function)
rbzmq.c:1683: error: ‘ZMQ_MCAST_LOOP’ undeclared (first use in this function)
rbzmq.c:1698: error: ‘ZMQ_RECOVERY_IVL_MSEC’ undeclared (first use in this function)
make: *** [rbzmq.o] Error 1

[Altonymous]

Found another post that suggested using a different branch that supports zmq 3.

gem 'zmq', github: 'zeromq/rbzmq', branch: 'zeromq3'

Installs fine under this branch, but not sure if it works yet.

[trafalco]

Did that branch work for you?

[efatsi]

A workaround for me was to use the older version of zeromq: brew install zeromq22

[skandragon]

It is a shame that the zeromq-project supplied Ruby bindings do not support the most recent zeromq. It would seem those should be in lock-step.

If I spend the time fixing this gem up to work with 4.x, who do I coordinate with in the zeromq project to ensure I'm not wasting my time? Perhaps it's time to just fork...

[gdo]

Use http://zeromq.org/bindings:ruby-ffi

[mikofski]

the errors are due to incompatible changes in ZMQ macros. For example ZMQ_HWM is split into send high water mark, ZMQ_SNDHWM and receive ZMQ_RCVHWM.

You should probably use ffi-zmq as gdo recommends or czmq

if you want to patch rbzmq, there are some recommended shims