configure warning report

[Jean Cardona]

configure: WARNING: sys/sysctl.h: present but cannot be compiled
configure: WARNING: sys/sysctl.h:     check for missing prerequisite
headers?
configure: WARNING: sys/sysctl.h: see the Autoconf documentation
configure: WARNING: sys/sysctl.h:     section "Present But Cannot Be
Compiled"
configure: WARNING: sys/sysctl.h: proceeding with the preprocessor's
result
configure: WARNING: sys/sysctl.h: in the future, the compiler will take
precedence
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to [e-mail] ##
configure: WARNING:     ## ------------------------------------ ##