[Buildroot] [Fwd: Re: Struggling with undefined reference to `__fgetc_unlocked']

Carmelo AMOROSO carmelo.amoroso at st.com
Thu Aug 23 16:57:57 UTC 2007


Thiago A. Corrêa wrote:
> That file actually calls fgetc, so I guess it's a dreadfull define :P
>
> I suppose it is using uClibc headers instead of the native compiler ones.
>   
Run the compiler with -v to see which -I directives it is using... where 
it is looking for C headers.
If you are using a plain g++ from the host, I don't think it's using 
uClibc headers.
> On 8/23/07, Carmelo AMOROSO <carmelo.amoroso at st.com> wrote:
>   
>> my reply below
>>
>> -------- Original Message --------
>> Subject:        Re: [Buildroot] Struggling with undefined reference to
>> `__fgetc_unlocked'
>> Date:   Thu, 23 Aug 2007 18:42:31 +0200
>> From:   Carmelo Amoroso <carmelo.amoroso at st.com>
>> Organization:   STMicroelectronics
>> To:     "Thiago A. Corrêa" <thiago.correa at gmail.com>
>> References:
>> <d6cda7730708230925x19bc0901v9a6dd1f18ee325ec at mail.gmail.com>
>> <46CDB759.709 at st.com>
>> <d6cda7730708230939p7b126fe1mbe28768aa4413bb4 at mail.gmail.com>
>>
>>
>>
>> Thiago A. Corrêa wrote:
>>     
>>> Hi Carmelo,
>>>
>>>    That command returned
>>> gentoo-vm buildroot # readelf -s /lib/libc.so.6 | grep fgetc_unlocked
>>>   1868: 0005e040    40 FUNC    WEAK   DEFAULT   11 fgetc_unlocked@@GLIBC_2.1
>>> gentoo-vm buildroot #
>>>
>>>    I'm guessing the prepended underscores are due to mangling, but
>>> could be wrong.
>>>
>>>       
>> Not, they are part of the symbol's name... you need to fix qtopia to
>> call the fgetc_unlocked.
>>
>> Cheers
>>     
>>> On 8/23/07, Carmelo AMOROSO <carmelo.amoroso at st.com> wrote:
>>>
>>>       
>>>> Thiago A. Corrêa wrote:
>>>>
>>>>         
>>>>> Hi,
>>>>>
>>>>>    I'm struggling with qtopia. During the link of rcc (which is a host
>>>>> tool, natively compiled) I get:
>>>>>
>>>>> I googled for the error, but could only find ppl complaining about
>>>>> this when linking against uClibc, when this should be linking against
>>>>> the system glibc. Does anyone has an idea of what I could try?
>>>>>
>>>>> Regards,
>>>>>     Thiago A. Correa
>>>>>
>>>>>
>>>>>           
>>>> Which glibc version have you installed on your host?
>>>> For example, on my RHEL 3 there is glibc-2.3.4 which doesn't contain the
>>>> __fgetc_unlocked
>>>> symbol, while fgetc_unlocked (no underscore prepending)...
>>>> so just check your glibc by running 'readelf -s /lib/libc.so.6 | grep
>>>> fgetc_unlocked'
>>>> and see what it returns.
>>>>
>>>> Regards,
>>>> Carmelo
>>>>
>>>>
>>>>         
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>>>>>
>>>>>
>>>>>
>>>>>           
>>
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>>     




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