https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15360
--- Comment #10 from Andrei Cherniaev ---
I suggest allow use directive extern without array size.
main.c:
#define size ( 1 )
char arr[size];
int main()
{
return 0;
}
second.c:
extern char arr[];
void f(){
sizeof(arr);
}
It was error:
invalid application of 'sizeof' to incomplete type 'char[]'
I can modify second.c: extern char arr[size];
But I ned export my define to second.c... It is not flexiable.
More than that, I can use mistake: in one file one size and in second size will
another...
main.c:
char arr[1];
int main()
{
return 0;
}
second.c:
extern char arr[999];
void f(){
sizeof(arr);
}
I think gcc should prevent it error. But now I can't see even warning...
So I suggest allow to use directive extern without array size.
