This bug was fixed in the package mpich - 3.4.1-5ubuntu1
--------------- mpich (3.4.1-5ubuntu1) impish; urgency=medium
* d/rules: Make GF10_FLAGS become GF11_FLAGS, to account for GCC/GFortran 11. (LP: #1942265)
-- Sergio Durigan Junior <email address hidden> Tue, 31 Aug 2021 21:12:19 -0400
This bug was fixed in the package mpich - 3.4.1-5ubuntu1
---------------
mpich (3.4.1-5ubuntu1) impish; urgency=medium
* d/rules: Make GF10_FLAGS become GF11_FLAGS, to account for
GCC/GFortran 11. (LP: #1942265)
-- Sergio Durigan Junior <email address hidden> Tue, 31 Aug 2021 21:12:19 -0400