Detailed description
While compiling BMP firmware with the -flto flag, I noticed that the probe does not respond to packets sent to /dev/ttyBmpGdb which led me to investigate why. In the process I found that there is Undefined Behavior with the declaration and usage of the usb_config variable. After fixing this UB, I can now interact with BMP firmware which was compiled with Link Time Optimizations(LTO)
Your checklist for this pull request
- I've read the Code of Conduct
- I've read the guidelines for contributing to this repository
- It builds for hardware native (see Building the firmware)
- It builds as BMDA (see Building the BMDA)
- I've tested it to the best of my ability
- My commit messages provide a useful short description of what the commits do
Closing issues
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## Detailed description
While compiling BMP firmware with the `-flto` flag, I noticed that the probe does not respond to packets sent to `/dev/ttyBmpGdb` which led me to investigate why. In the process I found that there is Undefined Behavior with the declaration and usage of the `usb_config` variable. After fixing this UB, I can now interact with BMP firmware which was compiled with Link Time Optimizations(LTO)
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## Your checklist for this pull request
* [x] I've read the [Code of Conduct](https://codeberg.org/blackmagic-debug/blackmagic/src/CODE_OF_CONDUCT.md)
* [x] I've read the [guidelines for contributing](https://codeberg.org/blackmagic-debug/blackmagic/src/CONTRIBUTING.md) to this repository
* [x] It builds for hardware native (see [Building the firmware](https://codeberg.org/blackmagic-debug/blackmagic?tab=readme-ov-file#building-the-firmware))
* [x] It builds as BMDA (see [Building the BMDA](https://codeberg.org/blackmagic-debug/blackmagic?tab=readme-ov-file#building-black-magic-debug-app))
* [x] I've tested it to the best of my ability
* [x] My commit messages provide a useful short description of what the commits do
## Closing issues
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