Extend ABI detection to type sizes and byte order
As part of enabling a language, we detect the toolchain's target ABI using logic here and here. Currently it is primarily used to detect sizeof(void*)
. Since we have to compile that test source file anyway, we might as well use it to detect more information that is always available. This can include:
- The sizes of fundamental types.
- The target architecture byte order (endianess).
The results can then be memorized and used later. Modules like CheckTypeSize
and TestBigEndian
could just use the results instead of performing actual checks.
Edited by Brad King