* Implement -Wtruncation=level
-Wtruncation=0 is the same as the current -Wno-truncation.
-Wtruncation=2 is the same as the current -Wtruncation.
-Wtruncation=1 is the new default; it's less strict, allowing
N-bit values to be between -2**N and 2**N (exclusive).
* Implement generic "parametrized warning" system
* Test more `Wtruncation` variants
Co-authored-by: ISSOtm <eldredhabert0@gmail.com>
Simplify the mess that was option setting (2 redundant variables !?)
Move options to a separate file
Have "modules" own their options, and OPT only access them (less redundancy)
Simplify code, respect naming conventions better