QNX support

[vcomito-apexai]

Describe the feature

I would like to add support for QNX.

Use Case

Run the aws-sdk-cpp functionalities on QNX platforms (e.g. QOS 7.1)

Proposed Solution

The main changes would consist of implementing a new event_loop based on ionotify and extend some of the CMakeLists.txt and preprocessor lines.

Other Information

The main problem is that, being the QCC compiler for QNX not available on CI/CD, the changes must be verified manually when building for QNX

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

[waahm7]

Thank you for creating the issue and offer to help. We already have PR in progress for QNX support at #669.