5726c27fa913296aafab9f50b912cea5b3709271 broke
x86 specific options and user emulation specific stdio buffering.
Always enable all log items. They may not be useful for non-x86 targets,
but there's no harm either.
Fix user emulation buffering by passing around a flag.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Don't use global variables directly but via accessor functions. Rename globals.
Convert macros to functions, add GCC format attributes.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>