gcc: why is "abcdef"[3] not a constant (error: initializer element is not constant)

[m-h-l <markus.lehmann@xxxxxxxxx>]

Hi,

if I write this little code and compile with gcc-4.x.x then I get:
error: initializer element is not constant

#include <stdio.h>
#include <string.h>

typedef struct
{
    char  oneChar;
    void *ptr2;
} xxx_t;

int main( void )
{
    static xxx_t ms =  { "12345"[3], 0 };

    printf("\n\n MyOutput: 0x%x  0x%x \n\n", ms.oneChar, ms.ptr2 );
}

(I know that this code is rubbish but this just an extract from a bigger
issue, broken down to this)

What can be more constant than  "12345"[3] ?

In g++ it works ... but I have to use gcc.

Any help about how to get this solved is welcome :-)




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