[ELDK] error: 'errno' undeclared

[Alberto Ciampini]

Il 22/09/2010 10:20, Stefano Babic ha scritto:
> Alberto Ciampini wrote:
>
> Hi Alberto,
>
>    
>>>> i have a strange issue when cross compiling for arm: if i try to use
>>>> errno (or build programs that uses it), i get (for example):
>>>>
>>>> cmem.c:116: error: 'errno' undeclared (first use in this function)
>>>> cmem.c:116: error: (Each undeclared identifier is reported only once
>>>> cmem.c:116: error: for each function it appears in.)
>>>>
>>>>          
>>> I cannot confirm this issue, I can compile clean for ARM (you miss to
>>> say which version of ELDK you are using. Let's say, we are using
>>> ELDK-4.2).
>>>
>>>        
>> sorry, i forgot that.... yes it's 4.2
>>
>> $ more eldk/version
>> ELDK version 4.2
>> arm: Build 2008-11-24
>>
>>
>>      
> Ok. Please do not drop the list as CC: to let other people to see the
> results of the discussion.
>    

oops.... sorry!! :-[


>>> The errno should be in the libc, and in the include path you find the
>>> extern reference.
>>>
>>>        
>> maybe the problem is that it doesn't find the extern reference??
>>      
> However, I see in arm/usr/include/errno.h:
>
> 46 #ifndef errno
> 47 extern int errno;
> 48 #endif
>
> If you do not set yourself errno with something like "#define errno
> ...", the reference should be find.
>    

that's weird!!
this is the content of my arm/usr/include/errno.h

#include <asm-generic/errno.h>


(just that line)


>> hmm.... it doesn't compile either.... same error:
>>
>> $ arm-linux-gcc -Wall -o testerrno testerrno.c
>> testerrno.c: In function 'main':
>> testerrno.c:17: error: 'errno' undeclared (first use in this function)
>> testerrno.c:17: error: (Each undeclared identifier is reported only once
>> testerrno.c:17: error: for each function it appears in.)
>>      
> It seems your ELDK installation has problems. Have you tried with a
> fresh installed ELDK ?

i'll try!! thanks again!! :-)


-- 
alberto ciampini
a.ciampini at sicep.it


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