mosquittopp.dll is linked against debug runtime

[ennorehling]

The mosquittopp.dll is linked against vcruntime140d.dll (the MS debug runtime). That makes it impossible to ship a game with it, because the Visual C++ Redistributable installers only install release libraries (vcruntime140.dll).

Since the plugin uses such a very old version of mosquitto (version 1.4.8) I haven't been able to find alternative libraries anywhere (or compile them myself).

[cbeauche]

I can also confirm that a machine that doesn't have the debug dlls will crash when a ship build is run. Adding the dlls VCRUNTIME140D.DLL and UCRTBASED.DLL will fix the crash but building the dll against the release libraries would be better.

[ennorehling]

I have recently built the libraries from scratch, because I wanted to implement TLS support. I could split that out into a separate PR. I have matching Linux libraries, too. Haven't done much testing yet, because other things came up at work.

[ennorehling]

My changes are in PR #54 - I believe they work on Windows and Linux, but I don't have Mac to test them on, those libraries come from Andrew Ivasiv's work in the abandoned tls_support branch. Would be nice if someone could confirm that this works.

[cbeauche]

we'll try and let you know, thanks!

[cbeauche]

We're having serialization issues with our project and I can't restart from scratch to test it at this point. I'll continue bundling the debug dlls for now. Thanks.

[ennorehling]

Note that if you bundle the Debug DLLs, your customer will need to have Debug versions of the CRT, which you're not allowed to redistribute.

To quote Microsoft:

You also can't redistribute debug versions of your applications, or the debug versions of DLLs or libraries supplied by Microsoft. You may only copy debug executables and libraries to machines you use for testing.