[ECOS] Can´t bind printf - Help!

["Ramiro C. Carvalho" <ramiro dot carvalho at uol dot com dot br>]

Hi everybody.

I am strugling with ld since i always get the message "undefined reference 
to `printf'" when trying to build my ecos application.

The platform is the Gameboy Advance (ARM7) and i am compiling with an ecos 
repository snapshot from 01-may-2005.

I used objdump and could see 'printf' was included in libtarget.a (file 
printf.cxx) as shown below:


language_c_libc_stdio_printf.o:     file format elf32-little

SYMBOL TABLE:
00000000 l    df *ABS* 00000000 printf.cxx
00000000 l    d  .text 00000000
00000000 l    d  .data 00000000
00000000 l    d  .bss 00000000
00000000 l    d  .debug_abbrev 00000000
00000000 l    d  .debug_info 00000000
00000000 l    d  .debug_line 00000000
00000000 l    d  .text.printf 00000000
00000000 l    d  .debug_frame 00000000
00000000 l    d  .debug_pubnames 00000000
00000000 l    d  .debug_aranges 00000000
00000000 l    d  .debug_str 00000000
00000000 l    d  .comment 00000000
00000000 g       .text.printf 00000020 printf
00000000         *UND* 00000000 vfnprintf
00000000         *UND* 00000000 stdout


By looking into the map file created by ld when trying to build the 
application, i could see for example that 'vfnprintf' was bound into the 
executable but not printf:


.text.vfnprintf
               0x08020604      0x9d4 
C:\Desen\C\ecos\ecos-gbax-19-09-2005-net\ecos-gbax-19-09-2005-net_install\lib/libtarget.a(language_c_libc_stdio_vfnprintf.o)
               0x08020604                vfnprintf


Is it related to thumb/ARM mode compatibilities between libtarget.a and my 
application? I used -mthumb and  -thumb-interwork to compile both. I ask 
this because at the end of the map file i found the following section:

.glue_7t       0x0802a35c       0x30 
C:\cygwin\opt\ecos\gnutools\arm-elf\lib\gcc-lib\arm-elf\3.2.1\thumb\interwork/libgcc.a(_clz.o)
               0x0802a374                __sscanf_from_thumb
               0x0802a364                __isspace_from_thumb
               0x0802a35c                __printf_from_thumb
               0x0802a37c                __floor_from_thumb
               0x0802a388                __fprintf_change_to_arm
               0x0802a380                __floor_change_to_arm
               0x0802a370                __tolower_change_to_arm
               0x0802a360                __printf_change_to_arm
               0x0802a368                __isspace_change_to_arm
               0x0802a378                __sscanf_change_to_arm
               0x0802a384                __fprintf_from_thumb
               0x0802a36c                __tolower_from_thumb
               0x0802a38c                _etext = .
               0x0802a38c                PROVIDE (__etext, .)


and i´ve got also the same problem for 'isspace', 'tolower', 'sscanf', 
'floor' and 'fprintf' which coincidently are the functions shown on the 
section above.

The template used to build ecos was 'net' and i think it includes everything 
i need to use 'printf'.

Regards.

Ramiro C. Carvalho.
ramiro.carvalho@uol.com.br


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