[PATCH 0/1] MR8487: configure: Use SSE for floating point math on i386.

[Jacek Caban (＠jacek)]

The main motivation here is to unify the build configuration. This primarily impacts GCC MinGW, since Clang already defaults to using SSE. Additionally, downstream projects like Proton and CrossOver already use `-mfpmath=sse`.

This does slightly change the compatibility requirements, we now assume SSE support. That’s unlikely to be an issue today, but for those who need it, the behavior can still be overridden via `CROSSCFLAGS`. If needed, we could also add a `--disable-sse` configure option to make this easier to control.