I hit this on i386 today but haven't run into it before, I don't know what changed to trigger it.
It doesn't look like any of the libraries that it uses have changed recently.. WANTLIB += SDL c expat freetype m pthread z cc -DHAVE_CONFIG_H -DUSE_LSB -DUSE_ASM_INLINE -DUSE_ASM_EMUMIPS3 -O2 -pipe -DNDEBUG -D_REENTRANT -I./advance/osd -I./advance/lib -I./advance/blit -I./advance/linux -DADV_DATADIR=\"/usr/local/share/advance\" -DADV_SYSCONFDIR=\"/etc\" -DUSE_VIDEO_NONE -DUSE_SOUND_NONE -DUSE_KEYBOARD_NONE -DUSE_MOUSE_NONE -DUSE_JOYSTICK_NONE -DUSE_LCD -DUSE_SMP -I/usr/local/include -I/usr/local/include/SDL -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/X11R6/include -DXTHREADS -I./advance/sdl -DUSE_VIDEO_SDL -DUSE_SOUND_SDL -DUSE_KEYBOARD_SDL -DUSE_MOUSE_SDL -DUSE_JOYSTICK_SDL -I/usr/X11R6/include/freetype2 -DUSE_FREETYPE -DUSE_MOUSE_RAW -DADV_VERSION=\"1.4\" -DADV_EMU -c advance/blit/blit.c -o obj/mame/generic/blend/advance/blit/blit.o advance/blit/vpalette.h: In function 'video_line_palette16to8_mmx': advance/blit/vpalette.h:293: error: can't find a register in class 'GENERAL_REGS' while reloading 'asm' advance/blit/vpalette.h:293: error: 'asm' operand has impossible constraints gmake: *** [advance/emu.mak:569: obj/mame/generic/blend/advance/blit/blit.o] Error 1
