A problem to compile RTEMS with manually makefile scripts,maybe a linking proble

Ralf Corsepius corsepiu at faw.uni-ulm.de
Tue Nov 5 15:14:08 UTC 2002

Am Die, 2002-11-05 um 15.42 schrieb 张 智超:
> I'm a student,I want to study RTEMS. 
> I try to write a MakeFile manually to compile RTEMS.
This is far from being a clever decision..

> The compile process 
> succeed,then I use i386-rtems-ar command to create static lib 
> (libkernel,libbsp,libc,libstart)just like the auto generate scripts do,it 
> is also OK. 
> But when I build the demo(c/src/tests/samples/hello) ,gcc report: 
>   /c/src/tests/samples/hello/init.c:31: undefined reference to `printk'. 
> but I can sure the printk define and implement in libbsp.a.Because the 
> result of command "i386-rtems-nm -s libbsp.a" contain : 
> printk.o: 
>         U BSP_output_char 
> 00000271 t Letext 
> 00000000 t printNum 
> 000000c4 T printk 
> The scripts to build the demo is: 
>         ${CC}  -c -Wall -fasm -g  ${INCLUDEFLAGS} init.c -o init.o 
> ${AR} ruvs libhello.a init.o 
> ${LD} -N -T linkcmds -Map map.txt -e _start  -L./  --start-group -l hello 
> -lc -lkernel -lbsp -lstart --end-group init.o -o hello.elf 
>        What's Wrong?? 
RTFM - You're on your own


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