Dear Aneesh,
In message 4E00447B.9070804@ti.com you wrote:
$ gcc main.c main.c:5: error: initializer element is not constant main.c:5: error: (near initialization for arr[0]) main.c:7: error: initializer element is not constant main.c:7: error: (near initialization for arr[1])
I have to admit that I don't understand either why this error is raised here; after all, from our understanding of the code these _are_ constant addresses.
You may want to ask this in a compiler group...
As a result, I will have to do something like this to populate my array:
static unsigned int *const reg_arr[] = { &(((struct my_regs_struct *const)OMAP4_PRCM_REG_BASE)->uart_clkctrl), &(((struct my_regs_struct *const)OMAP4_PRCM_REG_BASE)->i2c_clkctrl), };
Is this acceptable?
No, please don't.
Note that the following code compiles fine:
----------------------------- snip ----------------------------- #include <stdio.h>
struct my_regs_struct { unsigned int reg1; unsigned int reg2; unsigned int reg3; };
static struct my_regs_struct *const my_regs = (struct my_regs_struct *) 0x1000;
static void print_regs(void) { unsigned int *const reg_arr[] = { &my_regs->reg1, &my_regs->reg3, }; printf("regs %p %p \n", (void *)reg_arr[0], (void *)reg_arr[1]); }
int main(void) { print_regs(); return 0; } ----------------------------- snip -----------------------------
With "gcc -Wall -pedantic" you will get warnings "initializer element is not computable at load time [enabled by default]", but this can be avoided by adding "--std=c99" to the compiler options.
Best regards,
Wolfgang Denk