illegal constant expression

Code:

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My code is as follows:
---------------------------------------------------------------------------
main.c
---------------------------------------------------------------------------
long VALUE_IP_1,VALUE_IP_2,VALUE_IP_3,VALUE_IP_4; //global variables

void main()
{

VALUE_IP_1 = (*(unsigned long *)0x44020000);
VALUE_IP_2 = (*(unsigned long *)(0x44020000+4));
VALUE_IP_3 = (*(unsigned long *)(0x44020000+8));
VALUE_IP_4 = (*(unsigned long *)(0x44020000+12));
}


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I then created a diferent  file b.c
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extern long VALUE_IP_1,VALUE_IP_2,VALUE_IP_3,VALUE_IP_4;

long var[4] = {VALUE_IP_1,VALUE_IP_2,VALUE_IP_3,VALUE_IP_4};

When I compile the code I get following error.

Error: illegal constant expression

Please help me solve this problem.I am trying to read the value from the memory locations and store those values in array "var" everytime the program starts.

Thanks
nta

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make VALUE_IP_x defines and not the variables

And don't use void main; use int main.

If you must have a global array, then you will get this error even if you use #define's. You just have to initialize the array elements yourself.

Code:

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#define START_ADDR 0x44020000

typedef unsigned long u_long;

#define VALUE_IP_1 (*((volatile u_long*)START_ADDR))
#define VALUE_IP_2 (*((volatile u_long*)(START_ADDR + 4)))
#define VALUE_IP_3 (*((volatile u_long*)(START_ADDR + 8)))
#define VALUE_IP_4 (*((volatile u_long*)(START_ADDR + 12)))

u_long var[4];

void init_example_1()
{
    var[0] = VALUE_IP_1;
    var[1] = VALUE_IP_2;
    var[2] = VALUE_IP_3;
    var[3] = VALUE_IP_4;
}

void init_example_2()
{
    volatile u_long *src = (volatile u_long*)START_ADDR,
                    *src_end = src + (sizeof(var)/sizeof(*var));
    u_long *dest = var;

    for (; src < src_end; ++src, ++dest)
        *dest = *src;
}

int main()
{
    init_example_1();
    init_example_2();

    return 0;
}

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gg