[Bug fortran/34928] Extension: volatile common blocks

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34928

--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Bud,

What was the purpose of this construct?
What is the valid way to replace it?