Can not build on ARM64 Darwin

[themightyoarfish]

This issue, which was deemed resolved occurs on current master.

[ 85%] Linking C shared module mosquitto_dynamic_security.so
Undefined symbols for architecture arm64:
  "_mosquitto_broker_publish", referenced from:
      _send_response in plugin.c.o
  "_mosquitto_callback_register", referenced from:
      _mosquitto_plugin_init in plugin.c.o
  "_mosquitto_callback_unregister", referenced from:
      _mosquitto_plugin_cleanup in plugin.c.o
  "_mosquitto_calloc", referenced from:
      _dynsec_auth__base64_decode in auth.c.o
      _dynsec_clients__config_load in clients.c.o
      _dynsec_clients__process_create in clients.c.o
      _dynsec_groups__config_load in groups.c.o
      _dynsec_groups__process_create in groups.c.o
      _dynsec__config_load in plugin.c.o
      _dynsec_roles__config_load in roles.c.o
      ...

cmake invocation is cmake .. -DOPENSSL_ROOT_DIR=/opt/homebrew/Cellar/[email protected]/1.1.1u/

• OS version: 12.6.5
• arch: apple silicon
• compiler: Apple clang version 14.0.0

[danh1979]

I also discovered this problem when attempting to update mosquitto in macports: https://trac.macports.org/ticket/67874

At first, I was able to add -DCMAKE_MODULE_LINKER_FLAGS="-undefined dynamic_lookup" to my cmake invocation to solve the problem, but perhaps the fix should be here in mosquitto's CMakeLists.txt as follows?

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b8913c2d..145f6255 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ if (WIN32)
 endif (WIN32)
 
 if(APPLE)
-       set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS} -undefined dynamic_lookup")
+       set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -undefined dynamic_lookup")
 endif(APPLE)
 
 include(GNUInstallDirs)

[BB-301]

I also discovered this problem when attempting to update mosquitto in macports: https://trac.macports.org/ticket/67874

At first, I was able to add -DCMAKE_MODULE_LINKER_FLAGS="-undefined dynamic_lookup" to my cmake invocation to solve the problem, but perhaps the fix should be here in mosquitto's CMakeLists.txt as follows?

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b8913c2d..145f6255 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ if (WIN32)
 endif (WIN32)
 
 if(APPLE)
-       set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS} -undefined dynamic_lookup")
+       set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -undefined dynamic_lookup")
 endif(APPLE)
 
 include(GNUInstallDirs)

@danh1979

The proposed solution worked for me. Thank you!

As I'm mentioning in #2744 (comment), I was having a similar problem while trying to build master tag v2.0.18 on macOS Ventura 13.2 (Intel).