Apple

The code is in 3 files.

Main.c

#include <stdio.h>

#include "header.h"

#include "utilities.c"

int main (int argc, const char * argv[]) {

// insert code here...

printf("Hello, World!\n");

return 0;

}

header.h

* header.h

* functionstoptrs

* Created by PB_G4 on 12/4/07.

int mystrcmp( char *, char *);

utilities.c

* utilities.c

* functionstoptrs

* Created by PB_G4 on 12/4/07.

#include "header.h"

int mystrcmp( char *s, char *t){

for ( ; *s == *t; s++, t++)

if( *s== '\0')

return 0;

return ( ( *s > *t) - ( *t > *s) );

}

The error message is a follows.

Building target “functionstoptrs” of project “functionstoptrs” with configuration “Release” — (1 error)

cd "/..../functionstoptrs"

/Developer/usr/bin/gcc-4.0 -o /..../functionstoptrs/build/functionstoptrs.build/Release/functionstoptrs.build/Objects-normal/ppc/functionstoptrs -L

/......./functionstoptrs/build/Release -F/......./functionstoptrs/build/Release -filelist /......./functionstoptrs/build/functionstoptrs.build/Release/functionstoptrs.build/Objects-normal/ppc/functionstoptrs.LinkFileList -arch ppc -mmacosx-version-min=10.5 -isysroot /Developer/SDKs/MacOSX10.5.sdk

ld: duplicate symbol _mystrcmp in /........../functionstoptrs/build/functionstoptrs.build/Release/functionstoptrs.build/Objects-normal/ppc/utilities.o and /........../functionstoptrs/build/functionstoptrs.build/Release/functionstoptrs.build/Objects-normal/ppc/main.o

collect2: ld returned 1 exit status

ld: duplicate symbol _mystrcmp in /........../functionstoptrs/build/functionstoptrs.build/Release/functionstoptrs.build/Objects-normal/ppc/utilities.o and /Users/m/k&R/functionstoptrs/build/functionstoptrs.build/Release/functionstoptrs.build/Objects-normal/ppc/main.o

collect2: ld returned 1 exit status

Build failed (1 error)

I understand that the compiler believes mystrcmp is being duplicated, but I am not sure I understand why this is happening.

Could someone help me become unstuck?

thank you in advance.