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extern "C" missing from mosquitto_broker.h and mosquitto_plugin.h #1290

D-r-P-3-p-p-3-r opened this issue May 23, 2019 · 1 comment


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commented May 23, 2019

This makes it a little tricky to write an auth-plugin in C++.

You have to include the files like this

extern "C" {
#include <mosquitto_broker.h>

or C++ name mangeling is going to get in your way, e.g. like this

mosquitto[1076]: Error: Unable to load auth plugin "/foo/".
mosquitto[1076]: Load error: /foo/ undefined symbol: _Z25mosquitto_client_usernamePK9mosquitto

Most likely all "public" headers should provide extern "C" support - like mosquitto.h does.

ralight added a commit that referenced this issue May 23, 2019

Add 'extern "C"' on public headers.
mosquitto_broker.h and mosquitto_plugin.h

Thanks to Wolfgang Petroschka.

Closes #1290.

@ralight ralight added this to the 1.6.3 milestone May 23, 2019


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commented May 23, 2019

Completely agree, thanks done now thanks very much.

@ralight ralight closed this May 23, 2019

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