[MinGW] Force separate debug symbols if executable size is larger than 1.9 GB.

[bruvzg]

Windows PE32+ executable format is limited to 2 GB size (in reality usually about 1.90 - 1.95 GB since limit applies to the memory map no size on disk), and full debug symbols are huge.

Godot editor size with symbols is already close to the limit and if a large module is added, it easily exceeds it, rendering executable unusable.

This change automatically enables separation of the debug symbols if the limit is exceeded.

[Calinou]

This change automatically enables separation of the debug symbols if the limit is exceeded.

This reminds me that in the long term, we should investigate using separate_debug_symbols=yes for official builds and provide a separate download with just the debug symbols file for each platform (including export templates).

Is there much of a downside to using separate_debug_symbols=yes by default in 2023? We had some issues with it when it was the default in 2018, so we disabled it by default back then.

[fire]

What is the reasoning for a conditional toggle?

I'd like default on.

[bruvzg]

What is the reasoning for a conditional toggle?

It's slower to build and likely less compatible (I'm not sure if all IDEs will start the debugger in such a way that external symbols are picked up).

[akien-mga]

Thanks!