[Bug fortran/53940] Optionally warn about multiple explicit USE-association of the same symbol

[Joost.VandeVondele at mat dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53940

Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> changed:

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--- Comment #4 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
still useful.