Nagios plugins does not install


help, i want to install nagios under cygwin but got the following message during make all command:

check_procs.c: En la funci’on main': check_procs.c:106: error:PS_COMMAND’ undeclared (first use in this function)
check_procs.c:106: error: (Each undeclared identifier is reported only once
check_procs.c:106: error: for each function it appears in.)
check_procs.c:123: error: PS_FORMAT' undeclared (first use in this function) make[2]: *** [check_procs.o] Error 1 make[2]: Leaving directory/tmp/nagios-plugins-1.3.1/plugins’
make[1]: *** [all] Error 2
make[1]: Leaving directory `/tmp/nagios-plugins-1.3.1/plugins’
make: *** [all-recursive] Error 1