/usr/include/GNUstep/EOControl/ is in libsope-dev 3.2.6-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/GNUstep/EOControl/EOArrayDataSource.h
/usr/include/GNUstep/EOControl/EOClassDescription.h
/usr/include/GNUstep/EOControl/EOControl.h
/usr/include/GNUstep/EOControl/EOControlDecls.h
/usr/include/GNUstep/EOControl/EODataSource.h
/usr/include/GNUstep/EOControl/EODetailDataSource.h
/usr/include/GNUstep/EOControl/EOFetchSpecification.h
/usr/include/GNUstep/EOControl/EOGenericRecord.h
/usr/include/GNUstep/EOControl/EOGlobalID.h
/usr/include/GNUstep/EOControl/EOKeyGlobalID.h
/usr/include/GNUstep/EOControl/EOKeyValueArchiver.h
/usr/include/GNUstep/EOControl/EOKeyValueCoding.h
/usr/include/GNUstep/EOControl/EONull.h
/usr/include/GNUstep/EOControl/EOObserver.h
/usr/include/GNUstep/EOControl/EOQualifier.h
/usr/include/GNUstep/EOControl/EOSQLParser.h
/usr/include/GNUstep/EOControl/EOSortOrdering.h