Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

Unable to Include cppzmq Library in OMNeT++ Project Makefile Description

Open
  • Is something wrong?
#640 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
cpp
Domain
build-system

Research direction

Start with the project Makefile's makefiles target and the generated src/Makefile, then compare the include and library flags with the cppzmq README and the reported Windows vcpkg paths. Reproduce the zmq.hpp not found error in the OMNeT++ project. Done means the generated build can locate the cppzmq headers and compile the project.

Written by the indexing model from the issue text.

Description

I'm encountering an issue while trying to include the cppzmq library in my OMNeT++ project Makefile. My goal is to use cpppzmq as a messaging library for co-simulation between Carla and OMNET++ CARLANeT (https://github.com/carlanet). I followed the instructions in the project's README (https://github.com/zeromq/cppzmq) and installed cppzmq using vcpkg. However, when I add the necessary flags to the Makefile to link against cppzmq, I'm still unable to access the header files, and the compilation fails with the error message "zmq.hpp file not found" (project's workspace screenshot with error attached below)

Here's (the bold lines) the relevant portion of my Makefile where I added the flags to include cppzmq:

all: checkmakefiles
cd src && $(MAKE)

clean: checkmakefiles
cd src && $(MAKE) clean

cleanall: checkmakefiles
cd src && $(MAKE) MODE=release clean
cd src && $(MAKE) MODE=debug clean
rm -f src/Makefile

makefiles:
#cd src && opp_makemake -f --make-so --deep -o carlanet -O out -KINET4_4_PROJ=../../inet4.4 -DINET_IMPORT -I$$(INET4_4_PROJ)/src -L$$(INET4_4_PROJ)/src -lzmq -lINET$$(D)
cd src && opp_makemake -f --make-so --deep -o carlanet -O out -KINET4_4_PROJ=../../inet4.4 -DINET_IMPORT -I$(INET4_4_PROJ)/src -L$(INET4_4_PROJ)/src -lINET$(D) -LC:/Users/uqipali/Documents/omnet/omnetpp-6.0.2/vcpkg/packages/zeromq_x64-windows/lib -llibzmq-mt-4_3_5 -IC:/Users/uqipali/Documents/omnet/omnetpp-6.0.2/vcpkg/installed/x64-windows/include

checkmakefiles:
@if [ ! -f src/Makefile ]; then
echo;
echo '=======================================================================';
echo 'src/Makefile does not exist. Please use "make makefiles" to generate it!';
echo '=======================================================================';
echo;
exit 1;
fi

error_in_makefile

Could you please advise on what needs to be corrected in order to successfully use cppzmq in my OMNeT++ project? Any assistance would be greatly appreciated. Thank you in advance :)

Dominant language
C++
Stars
2.3k
Forks
799
Avg merge
2d 17h
Merged PRs (30d)
1

Getting set up

This project ships no dev container, Dockerfile or contributing guide, so setting up is up to you: start from its README, and see our first-contribution guide for the general steps.

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from zeromq/cppzmq

All issues in zeromq/cppzmq

Similar issues

More C++ issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.