+
−The present libprintf is a very light printf implementation that is well-suited
+
−for simple bare-metal programs like loadagent; in the present case it overrides
+
−the much heavier printf implementation in newlib.  Programs like the present
+
−loadagent only need printf in order to scribble on the serial console port,
+
−and the most sensible implementation is to have the "character output" function
+
−from the guts of printf point directly to the physical UART output routine, or
+
−a trivial wrapper that turns \n into \r\n.  In contrast, newlib's version would
+
−pull in the complete FILE table infrastructure and malloc etc - maybe OK for
+
−more complex embedded programs that use those facilities for other things under
+
−a bona fide RTOS, but it would be disgusting to pull that stuff in for a
+
−minimal program like ours.
+
−
+
−The present printf implementation has been used earlier by the same author
+
−(Michael Spacefalcon) in the StarMON family of PowerPC bootloaders, and in my
+
−MC68x302-based SDSL CPE devices (Hack-o-Rocket and OSDCU).