[Numpy-discussion] Compiler options for mingw?

Hi all, I'm curious about how to control compiler options for mingw builds of numpy on windows... Specifically, I want to build binaries without SSE support, so that they can run on older hardware. Setting a CFLAGS variable on the command-line doesn't appear to do anything, but perhaps appearances are deceiving. Thanks for any suggestions -- I've googled fruitlessly for a while. Zach