I'm building mjpegtools with mingw32 gcc 4.5.2 and msys. When i configure it as-is, it detects my cpu as core2 (which is correct) and compiles with -mcpu=core2 -mtune=core2 It is commendable. However, i would like to compile a version that will run on any more-or-less contemporary device, which means either -mtune=i686 or -mtune=generic I've tried building with --host=i686-pc-mingw32 (that is how mingw32 often identifies itself), but hit the problem with sigjmp_buf being undefined (googling for it didn't do any good), and generic-pc-mingw32 fails outright, since `generic' is not a correct cpu. So, in the end i want two things: 1) -mtune=generic 2) undefined HAVE_X86_CPU, which will prevent sigjmp_buf-related code from being compiled
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