[gfortran, PR33254] Add -fbounds-checking for character array constructors

[Tobias Burnus]

Tobias Schlüter wrote:
> the patch is straightforward, and does exactly what is advertised in
> the subject line.  Unfortunately, I discovered PR33727 while preparing
> this patch.  One PR down, still the same number to go.
Reviewing had been faster, if you used ADDPATCH ...

(And, since I started ranting, it would be great if FX were using the PR
number in the subject or at least in the message body; currently I have
to save his patches (MIME application/octet-stream) to find out whether
there is a PR.)

> Built and tested on i386-darwin.  Ok?
I think the patch is ok, however: The bounds check is done
unconditionally whereas the subject implies that it is only done with
-fbounds-check.

(I'm slightly inclined to prefer to have the check with -fbounds-check
only, but I am also satisfied with an unconditional error.)

Other compilers:
a) NAG f95 and g95 always give a run-time error
b) ifort, sunf95, openf95 give no error (not even with bounds checking
enabled)

Current gfortran does (b), with the patch it does (a)

Tobias