[Bug fortran/67493] -fcheck=recursive not thread aware

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67493

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |tkoenig at gcc dot gnu.org
         Resolution|---                         |INVALID

--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
In this particular case, all variables are on the stack, so this
is not a problem.

However, even a PURE function could put an array into static storage,
such as this example:

$ gfortran -S -fdump-tree-original worker.f90
$ cat worker.f90.003t.original 
worker (integer(kind=4) & restrict n, integer(kind=4) & restrict sumn)
{
  integer(kind=4) k;
  static integer(kind=4) x[10000];

  *sumn = 0;

[...]

So, for thread-safety, better specify RECURSIVE.