[En-Nut-Discussion] freopen: undefined reference

[amit khandelwal]

Hello,
    I see that you are linking to the nutinit.o file - 

a typical command would look like this - 

avr-gcc tcps.o  -mmcu=atmega128
-Wl,--defsym=main=0,-Map=tcps.map,--cref -L../../lib/gcc/atmega128 
../../lib/gcc/atmega128/nutinit.o  -lnutdev -lnutnet -lnutpro -lnutnet
-lnutfs -lnutos -lnutdev -lnutcrt -lnutos -o tcps.elf

hth,

-Amit Khandelwal



On Tue, 29 Mar 2005 17:08:42 +0000, Arjan Vroegop <atjev at hotmail.com> wrote:
> Hi!
> 
> I'm trying to control a LCD with a Ethernut 1.3g board. I tried the
> following code, which comes from the ethernut software manual:
> 
> #include <stdio.h>
> #include <dev/hd44780.h>
> #include <dev/term.h>
> int main(void)
> {
> /* Register the device we want to use. */
> NutRegisterDevice(&devLcd, 0, 0);
> /* Assign the device to stdout. */
> freopen("lcd", "w", stdout);
> printf("Hello world!\n");
> }
> 
> When I compile the program with avrgcc I get the following error:
> 
> make install
> avr-gcc main.o -mmcu=atmega128 -Wl,--defsym=main=0,-Map=main.map,--cref
> -Lc:/eth
> ernut/build/lib  c:/ethernut/build/lib/nutinit.o -lnutos -lnutdev  -o
> main.elf
> main.o(.text+0x1e): In function `NutAppMain':
> : undefined reference to `freopen'
> make: *** [main.elf] Error 1
> 
> I think it's a problem with the linking. I tried to find information about
> this problem on the internet, I saw something about the .map file. This file
> contains the following line:
> 
> freopen                                           main.o
> 
> I assume this means that the linker looks for freopen in main.o, which
> obviously isn't there. Is there anybody who know how to fix this?
> 
> Thanks in advance,
> Arjan Vroegop
> 
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