On Thu, 10 Dec 2015, Manuel López-Ibáñez wrote:

> On 12/09/2015 03:53 PM, Tobias Burnus wrote:
> > In principle, %<%c%> and %<%d%> should be convertable to %qc and
> > %qd (as the code is more readable), but the current function
> > annotation prevent this, telling that the q flag is not valid for
> > %c and %d. As %< is fine, I didn't dig into it.
> 
> You need to edit the gcc_gfc_* variables in c-family/c-format.c. The correct
> way to do that does not seem to be documented anywhere. I only got the current
> support working after painful trial and error.
> 
> Joseph, Jakub, could you advise the Fortran devs on how to edit c-format.c to
> handle %qc and %qd as the C/C++ FEs do?

Put "q" in the first flags string for those formats in gcc_gfc_char_table.

-- 
Joseph S. Myers
joseph@codesourcery.com