[Sdcc-user] printf() warning

[M. F. F. <m_f...@ho...>]

Hi.. all, and thank you Bernhard,

I tried to use one of 'printf_large()', 'printfl()' and 'vprintf()' like
this:

/*********************/
#include <at89x51.h>
#include <stdio.h>
   ...
   char MY_VAR;
   ...
void main( void ) {
   ...
   printfl( "0x%2h", MY_VAR );
   ...
}
/*********************/

...and the compiler gave me these msgs:

====
C:\Project\AT89 Writer\wri2051\firmware>sdcc -I c:\sdcc\share\include -L
c:\sdcc\share\lib\small --code-loc 0xc000 wri2051.c
wri2051.c(294):warning *** function 'printfl' implicit declaration
wri2051.c(295):warning *** function 'printfl' implicit declaration
wri2051.c(294):error   *** too many parameters
wri2051.c(295):error   *** too many parameters
error   *** code not generated for 'main' due to previous errors
====

I supposed that the 'printfl()' prototype was never declared ( is that
right? )

This is part of my code I tried to compile with objective to evaluate the
use of printf(),

/********************/
#include <at89x51.h>
#include <stdio.h>    /* i want to use prinf() */

unsigned char MY_VAR;
...

void main( void ) {
   ...
   printf( "0x%2h", MY_VAR );
   ...
}
/********************/

... and I got this warning msgs:

========
> cd C:\Project\AT89 Writer\wri2051\firmware\
> sdcc -I c:\sdcc\share\include -L c:\sdcc\share\lib\small --code-loc 0xc000
wri2051.c

C:\Project\AT89 Writer\wri2051\firmware>sdcc -I c:\sdcc\share\include -L
c:\sdcc\share\lib\small --code-loc 0xc000 wri2051.c
library file c:\sdcc\share\lib\small/libsdcc.lib
library file c:\sdcc\share\lib\small/libint.lib
library file c:\sdcc\share\lib\small/liblong.lib
library file c:\sdcc\share\lib\small/libfloat.lib

?ASlink-Warning-Undefined Global '_putchar' referenced by module 'vprintf'

C:\Project\AT89 Writer\wri2051\firmware>
========

I searched the file _putchar.*, and found none of them. Is this normal ?

Could some one give me hints on how to use one of 'printf...()', please....
:(

regrds,
fhy