[Bug fortran/97176] New: Cannot return deferred length strings when using -fno-automatic

[jeremy at jeremysanders dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97176

            Bug ID: 97176
           Summary: Cannot return deferred length strings when using
                    -fno-automatic
           Product: gcc
           Version: 10.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jeremy at jeremysanders dot net
  Target Milestone: ---

Created attachment 49261
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49261&action=edit
Test case

Functions returning deferred length strings return empty strings with the
-fno-automatic compiler option.

Please see the attached program (tested on trunk on godbolt.org).

$ gfortran testprog.f90
$ ./a.out
 Hello, world!

$ gfortran -fno-automatic testprog.f90
$ ./a.out