Package: glibc-doc Version: 2.3.1-3 Severity: minor "System Parameters" in the manual refers to sysctl.h for the prototypes and defines for sysctl(), but there doesn't seem to be a /usr/include/sysctl.h in libc6-dev (2.3.1-3). I wonder if that doco should say sys/sysctl.h, which exists.