windows/Makefile: Fix float exact int formatting on 32-bit mingw.

When compiler optimizations are enabled on the mingw version of gcc, we are
getting failing tests because of rounding issues, for example:

    print(float("1e24"))

would print

    9.999999999999999e+23

instead of

    1e+24

It turns out special compiler options are needed to get GCC to use the SSE
instruction set instead of the 387 coprocessor (which uses 80-bit precision
internall).

Signed-off-by: David Lechner <david@pybricks.com>

0 files changed, 0 insertions, 0 deletions