shared library suffix returns `d.so` rather than just `.so` when using debug

[wjwwood]

This is a behavior inherited from poco:

http://pocoproject.org/docs/Poco.SharedLibrary.html#16662

This commonly doesn't work for us, so I will probably open a pull request to change the behavior of the shared library suffix function in class_loader to make that optional or remove it entirely.

[mikaelarguedas]

Looking a bit into this it seems that we need to build poco with the definition POCO_NO_SHARED_LIBRARY_DEBUG_SUFFIX
https://github.com/pocoproject/poco/blob/558c7ff45fe32ffed02736b9732b4a9d8044aa53/Foundation/include/Poco/Config.h#L177

They don't expose that definition through CMake AFAICT so right now I'm tempted to extend the existing windows hack to the other platforms.

class_loader/src/class_loader.cpp

Lines 59 to 65 in adcb526

	#if !defined(WIN32)
	return Poco::SharedLibrary::suffix();
	#else
	// Return just .dll , as Poco::SharedLibrary::suffix() will return d.dll in debug mode.
	// This isn't common for our usecase (instead debug libraries are placed in a `Debug` folder).
	return ".dll";
	#endif

The other option would be to host a modified version of Poco in the ros2 org and to compile it with that definition.

[dirk-thomas]

Maybe we should consider to support that use case rather than providing custom built packages to avoid the debug suffix?