[Buildroot] uClibc debug symbols

[Peter Seiderer]

Hello Luca,

On Wed, 11 May 2016 11:43:12 +0200, Luca Ellero <luca.ellero at brickedbrain.com> wrote:

> Hi everybody,
> I'm trying to debug uClibc with a debugger, but even if I enable "build 
> packages with debugging symbols" it seems that debug symbols are not 
> present in the final binaries.
> 
> My .config reports:
> BR2_ENABLE_DEBUG=y
> BR2_DEBUG_2=y
> 
> I'm using binaries in output/staging/lib (is this the correct place to go?)
> 
> If I do "objdump -h | grep debug" on this libraries I get the following:
> 
> $ arm-buildroot-linux-uclibcgnueabi-objdump -h ld-uClibc-1.0.12.so | 
> grep debug
> 
> $ arm-buildroot-linux-uclibcgnueabi-objdump -h libuClibc-1.0.12.so | 
> grep debug
>    20 .debug_aranges 00000180  00000000  00000000  0004b310  2**3
>    21 .debug_info   00000c7a  00000000  00000000  0004b490  2**0
>    22 .debug_abbrev 00000353  00000000  00000000  0004c10a  2**0
>    23 .debug_line   000008ce  00000000  00000000  0004c45d  2**0
>    24 .debug_frame  00000124  00000000  00000000  0004cd2c  2**2
>    25 .debug_str    00000330  00000000  00000000  0004ce50  2**0
>    26 .debug_loc    0000068c  00000000  00000000  0004d180  2**0
>    27 .debug_ranges 00000038  00000000  00000000  0004d80c  2**0
> 
> Could someone please tell me what is wrong with this approach?
> 

For remote debugging this should work, the staging/sysroot libs
should have all debugging information, the libs on the target are
stripped until you enable:

  # BR2_STRIP_strip is not set
  BR2_STRIP_none=y

Worked for me with glibc/xserver etc. for local debugging on the
target, not tested with uClibc (do not forget to complete rebuild)...

Regards,
Peter

> Thanks
> Regards
> Luca
> 
> 
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