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All,
I have recently done a fresh install of both NetBSD 1.6 and (afterwards) 
NetBSD 1.6.1, and both installs had non-compilable sysctl.h header files.

I noticed this while running 'configure' on Apache 2 sources direclty 
from httpd.apache.org:

-------------------------------------------------------------------------
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: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to bug-autoconf@gnu.org. ##
configure: WARNING:     ## ------------------------------------ ##
-------------------------------------------------------------------------

I wrote my own quickie C program and compiled it. Sure enough, sysctl.h 
does not compile:

-------------------------------------------------------------------------
# cat test.c
#include <sys/sysctl.h>

int main(int argc, char *argv[])
{
     return 0;
}

cc test.c
In file included from /usr/include/sys/sysctl.h:48,
                  from test.c:1:
/usr/include/sys/ucred.h:51: `NGROUPS' undeclared here (not in a function)
/usr/include/sys/ucred.h:59: `NGROUPS' undeclared here (not in a function)
In file included from /usr/include/machine/proc.h:3,
                  from /usr/include/sys/proc.h:53,
                  from /usr/include/sys/sysctl.h:49,
                  from test.c:1:
/usr/include/mips/proc.h:52: `UPAGES' undeclared here (not in a function)
In file included from /usr/include/sys/proc.h:57,
                  from /usr/include/sys/sysctl.h:49,
                  from test.c:1:
/usr/include/sys/signalvar.h:50: `NSIG' undeclared here (not in a function)
/usr/include/sys/signalvar.h:60: parse error before `sigset_t'
/usr/include/sys/signalvar.h:60: warning: no semicolon at end of struct 
or union
/usr/include/sys/signalvar.h:66: parse error before `ps_oldmask'
/usr/include/sys/signalvar.h:66: warning: data definition has no type or 
storage class
/usr/include/sys/signalvar.h:71: parse error before `ps_sigmask'
/usr/include/sys/signalvar.h:71: warning: data definition has no type or 
storage class
/usr/include/sys/signalvar.h:72: parse error before `ps_sigignore'
/usr/include/sys/signalvar.h:72: warning: data definition has no type or 
storage class
/usr/include/sys/signalvar.h:73: parse error before `ps_sigcatch'
/usr/include/sys/signalvar.h:73: warning: data definition has no type or 
storage class
In file included from /usr/include/sys/sysctl.h:49,
                  from test.c:1:
/usr/include/sys/proc.h:67: `MAXLOGNAME' undeclared here (not in a function)
/usr/include/sys/proc.h:104: parse error before `int'
/usr/include/sys/proc.h:226: field `p_sigctx' has incomplete type
/usr/include/sys/proc.h:231: `MAXCOMLEN' undeclared here (not in a function)
/usr/include/sys/proc.h:231: size of array `p_comm' has non-integer type
In file included from test.c:1:
/usr/include/sys/sysctl.h:294: `MAXLOGNAME' undeclared here (not in a 
function)
/usr/include/sys/signalvar.h:65: storage size of `ps_sigstk' isn't known
-------------------------------------------------------------------------

Assuming someone has fixed this at some point, what's the best way to 
fix or upgrade my header files?

Thanks,
-chris

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