[Bug c/52952] Wformat location info is bad (wrong column number)

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52952

--- Comment #39 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
A summary of what is still pending:

1. Handle macros

#define c               " %d "
  __builtin_printf(c, 0.5);

2. Handle non-contiguous strings:

  __builtin_printf(" %" "d ", 0.5);

3. Handle const arrays:

  const char a[] = " %d ";
  __builtin_printf(a, 0.5);


I have an idea on how to fix 1 and 2 but no idea how to fix 3.