Porting Newlib to Microchip's dsPIC series
Mon Feb 2 12:59:00 GMT 2009
sÃ¶ndagen den 1 februari 2009 skrev Leo Singer:
> Here is the file that gets built from "printf.c". It gets put in my
> build directory under "pic30/newlib/libc/stdio/lib_a-printf.o". I see
> no mention of the symbol "printf", just "printf_r" and "iprintf".
> This is very strange because "iprintf" is not invoked directly
> anywhere inside the file "printf.c". Does anyone know what is going
It is an options for pic30-gcc:
This option attempts to statically analyze format strings passed to
printf, scanf and the f and v variations of these functions. Uses
of nonfloating point format arguments will be converted to use an
integer-only variation of the library functions.
To disable it, use the option -msmart-io=0
Depending on the option, the printf() routine will be named
_printf, _iprintf or _dprintf.
The same for fscanf, scanf, snprintf, sprintf, sscanf, vfprintf, vprintf,
vsnprintf and vsprintf
Which means that to use this feature, all those routines come in three
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