[PATCH] Avoid inter-test dependencies in gfortran.dg (PR fortran/56408)

[VandeVondele Joost]

>> What dejagnu version are you using?

> runtest --version
WARNING: Couldn't find the global config file.
Expect version is	5.44.1.15
Tcl version is		8.5
Framework version is	1.4.4