Greg Jandl to SDL I *think* the patch below works correctly: sdl-config gets the -march flag and SDL builds fine. Perhaps there's a better way to get the -march flag into both CFLAGS and SDL_FLAGS w/o dragging along more cruft, but adding it to BASE_CFLAGS seemed the best bet to my eyes.

/*
 *  jumphack.h
 *  SDLiPhoneOS
 *
 */

#ifndef _jumphack_h
#define _jumphack_h

#include "setjmp.h"

/* see SDL_uikitevents.m for more info */

extern jmp_buf *jump_env(void);

#endif