Re: Linking error

[naga raj <gnuuser dot raj at gmail dot com>]

Thanks Ian for the reply.

On Thu, Jun 14, 2012 at 10:23 PM, Ian Lance Taylor <iant@google.com> wrote:
> naga raj <gnuuser.raj@gmail.com> writes:
>
>> ? ? I am using arm compiler to run a simple c++ program
>>
>> ?#include <iostream>
>> ?#include <cstdlib>
>> ?using namespace std;
>>
>> ?int main(int argc, char* argv[])
>> ?{
>> ? ? ? ? ? ? ? ? cout <<"hi" <<endl;
>> ? ? ? ? ? ? ? ? return 0;
>> ? }
>>
>> ? It was compiled sucessfully but in linking it is throwing following errors
>>
>> ? arm-eabi-g++ -Wl,-T -Wl,../src/lscript.ld
>> -L../../empty_cpp_bsp_0/lib -o"empty_cpp_0.elf" ?./src/main.o
>> -Wl,--start-group,-llocal,-lgcc,-lc,-lstdc++,--end-group
>>
>> ../../empty_cpp_bsp_0/lib/liblocal.a(close.o): In function `close':
>> /proj/empty_cpp_bsp_0//libsrc/src/close.c:50: multiple definition of `close'
>> /bin/../lib/gcc/arm-eabi/4.6.1/../../../../arm-eabi/lib/libc.a(lib_a-sysclose.o):sysclose.c:(.text+0x0):
>> first defined here
>>
>> ../../empty_cpp_bsp_0/lib/liblocal.a(fstat.o): In function `fstat':
>> /proj/arm/empty_cpp_bsp_0/libsrc/src/fstat.c:51: multiple definition of `fstat'
>> /bin/../lib/gcc/arm-eabi/4.6.1/../../../../arm-eabi/lib/libc.a(lib_a-sysfstat.o):sysfstat.c:(.text+0x0):
>> first defined here
>> collect2: ld returned 1 exit status
>> make: *** [empty_cpp_0.elf] Error 1
>>
>> My requirement is to pick close() & fstat() functions from
>> /proj/empty_cpp_bsp_0/lib/liblocal.a not from
>> /bin/../lib/gcc/arm-eabi/4.6.1/../../../../arm-eabi/lib/libc.a
>>
>> I have included my local library with -L../../empty_cpp_bsp_0/lib..
>>
>> Can anyone please help me in fixing this compilation issue..
>
>
> This is really a library issue, and you didn't say anything about the
> libraries you are using.

   It is for a embedded target so we have developed our own libraries.
In our library close is just a dummy function it does nothing..

> You can try using the option -Wl,foo.map and then looking in the foo.map
> file to see why the different objects are being included. ?That may
> suggest how to fix your libraries.

 From map file I found that close() function is called from libc of
toolchain and not from my local library. I dont know why it is still
refering close in local library.

 > Ian

Thanks,
Nagaraju