RE: Link error

[Ian Bolton]

Phung Nguyen wrote:
> I am trying to build cross compiler for xc16x. I built successfully
> binutils 2.18; gcc 4.0 and newlib 1.18. Everything is fine when
> compiling a simple C file without any library call. It is also fine
> when making a simple call to printf like printf("Hello world").
> However, i got error message from linker when call printf("i=%i",i);

I don't know the answer, but I think you are more likely to get one
if you post to gcc-h...@gcc.gnu.org.  The gcc@gcc.gnu.org list is for
people developing gcc, rather than only building or using it.

I hope you find your answer soon.

Best regards,
Ian

Re: Link error ....redefinition of......

[Tim München]

On Tuesday 02 June 2009 08:16:35 Alex Luya wrote:
> I download source code for book < Analysis in C++ (Second Edition), /by Mark Allen Weiss>>
> from:http://users.cs.fiu.edu/~weiss/dsaa_c++/code/,try to compiler
> it,but got many errors,most of them say:
> .. previously declared here
> ...: redefinition of .
>
> I think template causes these errors,but how to fix it.


This is not the correct mailing list for such questions! Nevertheless, the 
reason for your compile errors is a simple one. Just drop the line

#include "StackAr.cpp"

from your header file. Why are you trying to include the implementation in the 
header? The other way round is how things work! (And you do have the header 
include in your implementation - why both directions?)



> ---
> My configuration:
> Ubuntu 9.04
> GCC version 4.3.3 (Ubuntu 4.3.3-5ubuntu4)
> Eclipse 3.4
> CDT:.5.0.2
> -
>
> Files  and error message are following:
>
> StackAr.h
> -
> #ifndef STACKAR_H
> #define STACKAR_H
>
> #include "../vector.h"
> #include "../dsexceptions.h"
>
> template 
> class Stack
> {
>   public:
> explicit Stack( int capacity = 10 );
> bool isEmpty( ) const;
> .
> #include "StackAr.cpp"
> #endif
>
> --
>
> StackAr.cpp
>
> #include "StackAr.h"
> template 
> Stack::Stack( int capacity ) : theArray( capacity )
> {
> topOfStack = -1;
> }
>
>  template 
> bool Stack::isEmpty( ) const
> {
> return topOfStack == -1;
> }
> ...
>
> Test.cpp
> #include 
> #include "StackAr.h"
> using namespace std;
>
> int main()
> {
> Stack s;
>
> for (int i = 0; i < 10; i++)
> s.push(i);
>
> while (!s.isEmpty())
> cout << s.topAndPop() << endl;
> return 0;
> }
>
>
> -
> error message:
>
>  Build of configuration Debug for project DACPP 
>
> make all
> Building file: ../src/stack/StackAr.cpp
> Invoking: GCC C++ Compiler
> g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP
> -MF"src/stack/StackAr.d" -MT"src/stack/StackAr.d"
> -o"src/stack/StackAr.o" "../src/stack/StackAr.cpp"
> ../src/stack/StackAr.cpp:7: erreur: redefinition of
> ‘Stack::Stack(int)’
> ../src/stack/StackAr.cpp:7: erreur: ‘Stack::Stack(int)’
> previously declared here
> ../src/stack/StackAr.cpp:17: erreur: redefinition of ‘bool
> Stack::isEmpty() const’
> ../src/stack/StackAr.cpp:17: erreur: ‘bool Stack::isEmpty()
> const’ previously declared here
> ...



-- 
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
<>  <>
<> Tim München, M.Sc.muenc...@physik.uni-wuppertal.de   <>
<> Bergische Universitaet   <>
<> FB C - Physik Tel.: +49 (0)202 439-3521  <>
<> Gaussstr. 20  Fax : +49 (0)202 439-2811  <>
<> 42097 Wuppertal  <>
<>  <>
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>