Source: mpich Version: 4.0.1-1 Severity: important Tags: ftbfs https://buildd.debian.org/status/logs.php?pkg=mpich&arch=ppc64
... checking for ucp/api/ucp.h... no configure: error: --with-ucx is given but not found This is due to the following in debian/rules: UCX_ARCH:= amd64 ppc64el arm64 ... ifneq (,$(findstring $(DEB_HOST_ARCH),$(UCX_ARCH))) DEVICE:= --with-device=ch4:ucx UCX:= --with-ucx=/usr #PMIX:= --with-pmix=/usr/lib/$(DEB_HOST_MULTIARCH)/pmix2 endif The problem is that "ppc64" is a substring of "ppc64el". "filter" instead of "findstring" fixes the problem.