RealView Compilation Tools - ARM Information Center

Language Extensions
In non-GNU mode, extern is ignored and the functionality is the same as
inline foo() for C++. In C, you must use __inline. See Extern inline
functions on page 5-19 for more information.
Mode
Supported in GNU mode only for C90.
3.7.12 Labels as values
The compiler supports GCC labels as values using the && operator.
Mode
Supported in GNU mode for C and C++.
Examples
A table of labels:
int f(int n)
{
void *const table[] = { &&a1, &&a2};
goto *table[n];
a1: return 1;
a2: return 2;
}
A label used for continuation:
void *toggle(void *lab, int *x)
{
if (lab) goto *lab;
a1: *x = 1; return &&a2;
a2: *x = 0; return &&a1;
}
3.7.13 Pointer arithmetic
You can perform arithmetic on void pointers and function pointers.
The size of a void type or a function type is defined to be 1.
Mode
Supported in GNU mode for C90 and C99 only.
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