[Buildroot] Shared objects, load order?

[Joachim Pihl <jpihl@nevion.com>]

On Wed, 02 Dec 2009 10:04:31 +0100, Joachim Pihl <jpihl@nevion.com> wrote:
>
> I suspect libboost_thread-mt.so is referencing libpthread.so.0 without
> actually loading it, but right now I don't have the time to investigate.

I have now confirmed that the problem is related to the specified order of  
the libraries when linking. I changed the order for the failing  
applications to match the one app that worked and voil?! - they came back  
to life. I don't think this is good, cross development is hard enough as  
it is without these kinds of gotchas.

>
>>
>>>
>>> Works:
>>>
>>> # ldd /multicon/gyda
>>>        libxml2.so.2 => /usr/lib/libxml2.so.2 (0x4000e000)
>>>        libgd.so.2 => /usr/lib/libgd.so.2 (0x4012b000)
>>>        libpng12.so.0 => /usr/lib/libpng12.so.0 (0x4016b000)
>>>        libpthread.so.0 => /lib/libpthread.so.0 (0x40191000)
>>>        libz.so.1 => /usr/lib/libz.so.1 (0x401ab000)
>>>        libboost_thread-mt.so => /usr/lib/libboost_thread-mt.so
>>> (0x401c4000)
>>>        libspread.so.2 => /usr/lib/libspread.so.2 (0x401d8000)
>>>        libcrypt.so.0 => /lib/libcrypt.so.0 (0x4023f000)
>>>        libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0x4025c000)
>>>        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x402c5000)
>>>        libm.so.0 => /lib/libm.so.0 (0x40376000)
>>>        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x40390000)
>>>        libc.so.0 => /lib/libc.so.0 (0x403a3000)
>>>        libdl.so.0 => /lib/libdl.so.0 (0x40401000)
>>>        librt.so.0 => /lib/librt.so.0 (0x4040c000)
>>>        libnsl.so.0 => /lib/libnsl.so.0 (0x40415000)
>>>        ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x40000000)
>>>
>>>
>>> Crashes:
>>>
>>> # ldd /multicon/phy
>>>        libboost_thread-mt.so => /usr/lib/libboost_thread-mt.so
>>> (0x4000e000)
>>>        libspread.so.2 => /usr/lib/libspread.so.2 (0x40022000)
>>>        libcrypt.so.0 => /lib/libcrypt.so.0 (0x40089000)
>>>        libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0x400a6000)
>>>        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x4010f000)
>>>        libm.so.0 => /lib/libm.so.0 (0x401c0000)
>>>        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x401da000)
>>>        libc.so.0 => /lib/libc.so.0 (0x401ed000)
>>>        libpthread.so.0 => /lib/libpthread.so.0 (0x4024b000)
>>>        librt.so.0 => /lib/librt.so.0 (0x40265000)
>>>        libnsl.so.0 => /lib/libnsl.so.0 (0x4026e000)
>>>        libdl.so.0 => /lib/libdl.so.0 (0x40277000)
>>>        ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x40000000)
>>>
>>>
>
>


-- 
Joachim Pihl
Senior R&D Engineer
Nevion Europe

Tel: +47 33 48 94 66
Fax: +47 33 48 99 98
Mobile: +47 91 33 98 91
jpihl at nevion.com
www.nevion.com

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