• State Not Answered
  • Locked Locked
  • Replies 5 replies
  • Subscribers 22 subscribers
  • Views 2345 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Link error on missing symbol that is there.

Jon Young

The symbol X shows up in the link map, but the linker still generates unresolved symbol errors for X in main. Any ideas?

File Main.c:

extern xdata X[];
static char xdata* p = X;

void main( void )
{
}


File Sub.c:

char xdata X[] _at_ 0x0012;

static char xdata* p = X;

Parents
  • 0

    Since no array size is given in Sub.c the compiler doesn't provide space and may even assume that X is external (therefore it is never created). This should work without 'data different' warnings;

    File Main.c:

    extern char xdata X;
static char xdata* p = X;

void main( void )
{
}


    File Sub.c:
    char xdata X _at_ 0x0012;

static char xdata* p = X;

    The other thing you can do is specify the array dimensions when declaring it.
    Best Luck

Reply
  • 0

    Since no array size is given in Sub.c the compiler doesn't provide space and may even assume that X is external (therefore it is never created). This should work without 'data different' warnings;

    File Main.c:

    extern char xdata X;
static char xdata* p = X;

void main( void )
{
}


    File Sub.c:
    char xdata X _at_ 0x0012;

static char xdata* p = X;

    The other thing you can do is specify the array dimensions when declaring it.
    Best Luck

Children
No data