Re: [Fortran, (RFC) patch] PR49110/51055 Assignment to alloc. deferred-length character vars

[David Edelsohn <dje dot gcc at gmail dot com>]

On Mon, Dec 10, 2012 at 5:05 AM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Mon, Dec 10, 2012 at 10:56:58AM +0100, Janus Weil wrote:
>> > For C and C++, identifiers beginning with underscore and upper case
>> > letter or with two underscores are reserve to the implementation.
>>
>> See the previous discussion in this thread ...
>
> That's true, but the implementation isn't just GCC, it is also C libraries
> which aren't provided by GCC.  Including a character (if possible) that
> will make it unaccessible from C/C++ is desirable.  And, not changing the
> names of non-TREE_STATIC vars is also desirable, those I'm afraid show up
> in the debug info from time to time, so making them unnecessarily larger
> results in .debug_info size increases.

An earlier suggestion was "_F." .  Maybe gfortran.h should follow the
same logic as gcc/defaults.h and gcc/cp/cp-tree.h:

#ifndef NO_DOT_IN_LABEL
"_F."
#else
#ifndef NO_DOLLAR_IN_LABEL
"_F$"
#else
"_F_"
#endif
#endif

Thanks, David