Cannot build on Mac with M1 chip.

[aryanLandi]

Building the latest mosquitto source code results in the following linker error on a Mac with the Apple M1 chip.

Undefined symbols for architecture arm64:
  "_mosquitto_callback_register", referenced from:
      _mosquitto_plugin_init in mosquitto_message_timestamp.c.o
  "_mosquitto_callback_unregister", referenced from:
      _mosquitto_plugin_cleanup in mosquitto_message_timestamp.c.o
  "_mosquitto_property_add_string_pair", referenced from:
      _callback_message in mosquitto_message_timestamp.c.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [plugins/message-timestamp/mosquitto_message_timestamp.so] Error 1
make[1]: *** [plugins/message-timestamp/CMakeFiles/mosquitto_message_timestamp.dir/all] Error 2
make: *** [all] Error 2

[NorbertHeusser]

On which branch did you test to compile the code ?

We fixed the cmake based build for the M1 Mac on the develop branch some time ago. Will be available on the master branch with the next major release.

[aryanLandi]

@NorbertHeusser Indeed I builded mosquitto from the master branch. After checking out the develop branch I had to install 2 more dependencies (CUnit and uthash). However, I can now confirm that the develop branch gives similar errors.

Undefined symbols for architecture arm64:
  "_mosquitto_callback_register", referenced from:
      _mosquitto_plugin_init in mosquitto_limit_subscription_qos.c.o
  "_mosquitto_plugin_set_info", referenced from:
      _mosquitto_plugin_init in mosquitto_limit_subscription_qos.c.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [plugins/examples/limit-subscription-qos/mosquitto_limit_subscription_qos.so] Error 1
make[1]: *** [plugins/examples/limit-subscription-qos/CMakeFiles/mosquitto_limit_subscription_qos.dir/all] Error 2
make: *** [all] Error 2

[ryandesign]

See proposed solution in #2858 (comment)

[BB-301]

@ryandesign ,

See proposed solution in #2858 (comment)

The proposed solution worked for me. Thank you!

I was having a similar problem while trying to build master tag v2.0.18 on macOS Ventura 13.2 (Intel).