Hi, Fedora is updating to gcc 10 now, and mpich is one of the packages that failed to rebuild [1]. The issue was discussed in gcc bugtracker [2] The workaround of adding -fallow-argument-mismatch "fixes" the issue [3]. Is there a plan for a better long-term fix? [1] https://bugzilla.redhat.com/show_bug.cgi?id=1795817 [2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91731 [3] https://src.fedoraproject.org/rpms/mpich/c/36f3761857c27b819831eda0ca97ae0cf... Zbyszek