/usr/include/sc/util/group/ is in libsc-dev 2.3.1-18+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/sc/util/group/LIBS.h
/usr/include/sc/util/group/file.h
/usr/include/sc/util/group/fileproc.h
/usr/include/sc/util/group/globcnt.h
/usr/include/sc/util/group/hcube.h
/usr/include/sc/util/group/linkage.h
/usr/include/sc/util/group/memamsg.h
/usr/include/sc/util/group/memarmci.h
/usr/include/sc/util/group/memiter.h
/usr/include/sc/util/group/memmsg.h
/usr/include/sc/util/group/memmtmpi.h
/usr/include/sc/util/group/memory.h
/usr/include/sc/util/group/memproc.h
/usr/include/sc/util/group/memrdma.h
/usr/include/sc/util/group/memshm.h
/usr/include/sc/util/group/message.h
/usr/include/sc/util/group/messaget.h
/usr/include/sc/util/group/messmpi.h
/usr/include/sc/util/group/messshm.h
/usr/include/sc/util/group/mstate.h
/usr/include/sc/util/group/pool.h
/usr/include/sc/util/group/pregtime.h
/usr/include/sc/util/group/rnglock.h
/usr/include/sc/util/group/thpthd.h
/usr/include/sc/util/group/thpuma.h
/usr/include/sc/util/group/thread.h
/usr/include/sc/util/group/topology.h