if test "x$with_kvm" = "xyes"; then    AC_MSG_CHECKING([whether struct ifnet has needed interface data])    AC_TRY_COMPILE([#include <sys/types.h>                    #include <sys/socket.h>		    #include <net/if.h>		    #ifdef HAVE_NET_IF_VAR_H		    #include <net/if_var.h>		    #endif],[struct ifnet in; in.if_ibytes = in.if_obytes;                             in.if_type = in.if_flags],                   with_kvm=yes, with_kvm=no)    AC_MSG_RESULT([$with_kvm])  fi  if test "x$with_kvm" = "xyes"; then    AC_MSG_CHECKING([for struct ifnet if_xname member])    AC_TRY_COMPILE([#include <sys/types.h>                    #include <sys/socket.h>		    #include <net/if.h>		    #ifdef HAVE_NET_IF_VAR_H		    #include <net/if_var.h>		    #endif],[struct ifnet in; in.if_xname[0] = 'a';],                   ifxname=yes, ifxname=no)    test "x$ifxname" = "xyes" && AC_DEFINE([HAVE_IFNET_IF_XNAME], 1,	[Define if you have a if_xname member in struct ifnet])    AC_MSG_RESULT([$ifxname])    AC_MSG_CHECKING([for struct ifnet if_next member])    AC_TRY_COMPILE([#include <sys/types.h>                    #include <sys/socket.h>		    #include <net/if.h>		    #ifdef HAVE_NET_IF_VAR_H		    #include <net/if_var.h>		    #endif],[struct ifnet in; in.if_next;],                   ifnext=yes, ifnext=no)    AC_MSG_RESULT([$ifnext])    if test "x$ifnext" = "xyes"; then        AC_DEFINE([HAVE_IFNET_IF_NEXT], 1,                  [Define if you have a if_next member in struct ifnet])    else       AC_MSG_CHECKING([for struct ifnet if_link member])      AC_TRY_COMPILE([#include <sys/types.h>                      #include <sys/socket.h>	 	      #include <net/if.h>  		      #ifdef HAVE_NET_IF_VAR_H		      #include <net/if_var.h>		      #endif],[struct ifnet in; in.if_link;],                     iflink=yes, iflink=no)      test "x$iflink" = "xyes" && AC_DEFINE([HAVE_IFNET_IF_LINK], 1,	  [Define if you have a if_link member in struct ifnet])      AC_MSG_RESULT([$iflink])    fi    AC_DEFINE([USE_KVM], 1, [Define if you want to use kvm to get stats])    AC_MSG_WARN([you might need to make ifstat SGID kmem to run as simple user])    local=yes  fifi# checking for hp dlpi interfacetest "x$with_dlpi" = "xauto" -a "x$local" = "xyes" && with_dlpi=noif test "x$with_dlpi" != "xno"; then  AC_CHECK_HEADERS(sys/dlpi.h sys/dlpi_ext.h stropts.h sys/mib.h)  AC_MSG_CHECKING([for dlpi streams interface])  AC_TRY_COMPILE([#ifdef HAVE_UNISTD_H		  #include <unistd.h>                  #endif                  #ifdef HAVE_SYS_DLPI_H                  #include <sys/dlpi.h>                  #endif                  #ifdef HAVE_SYS_DLPI_EXT_H                  #include <sys/dlpi_ext.h>                  #endif                  #ifdef HAVE_STROPTS_H                  #include <sys/stropts.h>                  #endif                  #ifdef HAVE_SYS_MIB_H                  #include <sys/mib.h>                  #endif], [mib_ifEntry mib; dl_hp_ppa_req_t req;                  struct strbuf ctlptr; putmsg(0, &ctlptr, NULL, 0);],		with_dlpi=yes, with_dlpi=no)  AC_MSG_RESULT([$with_dlpi])  if test "x$with_dlpi" = "xyes"; then    AC_DEFINE([USE_DLPI], 1, [Define if you want to use dlpi to get stats])    local=yes  fifitest "x$with_win32" = "xauto" -a "x$local" = "xyes" && with_win32=noif test "x$with_win32" != "xno"; then  AC_MSG_CHECKING([for win32 GetIfTable interface])  OLIBS="$LIBS"  LIBS="$LIBS -liphlpapi"  AC_TRY_LINK([#include <windows.h>               #include <iphlpapi.h>], [GetIfTable(NULL, NULL, 0);],	       [with_win32=yes], [with_win32=no; LIBS="$OLIBS"])  AC_MSG_RESULT([$with_win32])  if test "x$with_win32" = "xyes"; then    AC_DEFINE([USE_WIN32], 1, [Define if you want to use win32 to get stats])    local=yes  fifi  # checking for ioctl (siocgifconf) to get interfacestest "x$with_ioctl" = "xauto" -a "x$local" = "xyes" && with_ioctl=noif test "x$with_ioctl" != "xno"; then  AC_DEFINE([USE_IOCTL], 1, [Define if you want to use ioctls to get if list])  AC_CHECK_FUNC(socket, checksocket=no, checksocket=yes)  if test "x$checksocket" = "xyes"; then     case "x$LIBS" in      *-lsocket*);;      *) AC_CHECK_LIB(socket, socket) ;;    esac  fi  AC_CHECK_FUNC(if_nameindex, ifnameindex=yes, ifnameindex=no)  if test "x$ifnameindex" != "xyes"; then     case "x$LIBS" in      *-lnsl*);;      *) AC_CHECK_LIB(nsl, if_nameindex, [ifnameindex=yes; LIBS="$LIBS -lnsl"]) ;;    esac  fi  if test "x$ifnameindex" != "xyes"; then    AC_MSG_CHECKING([for sockaddr sa_len member])    AC_TRY_COMPILE([    #include <sys/types.h>    #include <sys/socket.h>],[struct sockaddr sa; sa.sa_len = 1;],                   salen=yes, salen=no)    test "x$salen" = "xyes" && AC_DEFINE([HAVE_SOCKADDR_SA_LEN], 1,	[Define if you have a sa_len member in struct sockaddr])    AC_MSG_RESULT([$salen])  else    AC_DEFINE([USE_IFNAMEINDEX], 1,	[Define if you want ot use if_nameindex to find interfaces])  fifi# checking for snmp (NET-SNMP/UCD-SNMP)if test "x$with_snmp" != "xno" ; then  OCPPFLAGS="$CPPFLAGS"  OLDFLAGS="$LDFLAGS"  snmp_ok=no  AC_PATH_PROG(netsnmpconfig, [net-snmp-config], [no], $PATH:$with_snmp)  if test "x$netsnmpconfig" != "xno"; then    CPPFLAGS="$CPPFLAGS `$netsnmpconfig --base-cflags 2>/dev/null`"    LDFLAGS="$LDFLAGS `$netsnmpconfig --libs 2>/dev/null`"    AC_MSG_CHECKING([whether net-snmp-config hints compiles and links fine])    AC_TRY_LINK([#include<net-snmp/net-snmp-config.h>], [snmp_sess_init((void *) 0);],                [snmp_ok=yes], [snmp_ok=no])    AC_MSG_RESULT([$snmp_ok])    if test "x$snmp_ok" = "xyes"; then      with_snmp=yes      snmp_type=net    else      CPPFLAGS="$OCPPFLAGS"      LDFLAGS="$OLDFLAGS"    fi  fi  if test "x$snmp_ok" != "xyes"; then    if test "x$with_snmp" != "xyes" ; then      CPPFLAGS="$CPPFLAGS -I$with_snmp/include"      LDFLAGS="$LDFLAGS -L$with_snmp/lib"    fi    AC_CHECK_HEADER(net-snmp/net-snmp-config.h, snmp_type=net,	  	    [AC_CHECK_HEADER(ucd-snmp/ucd-snmp-config.h,                                     snmp_type=ucd, with_snmp=no)])    if test "x$with_snmp" != "xno"; then      if test "x$snmp_type" = "xnet"; then         libsnmp="-lnetsnmp"      else         libsnmp="-lsnmp"      fi      with_snmp=no      SNMPLIBALONE="$libsnmp"      # Setting to be able to force linking with -lcrypto....      # This is needed on OpenBSD (at least) where the snmplib port links without -lcrypto,      # but fails to run.      AC_ARG_WITH(libcrypto,                  [  --with-libcrypto        force link with -lcrypto for UCD-SNMP (default=no)],	          [], [with_libcrypto=no])      if test "x$with_libcrypto" = "xyes" ; then        SNMPLIBALONE=""      fi      for lib in $SNMPLIBALONE "$libsnmp -lcrypto" ; do        if test "x$with_snmp" != "xyes" ; then          AC_MSG_CHECKING([for snmp support in $lib])          OLIBS="$LIBS"          LIBS="$LIBS $lib"          AC_TRY_LINK([], [snmp_sess_init();],                      [with_snmp=yes], [LIBS="$OLIBS"])          AC_MSG_RESULT([$with_snmp])        fi      done    fi  fi  if test "x$with_snmp" = "xyes" ; then    AC_DEFINE([USE_SNMP], 1, [Define if you have SNMP support])    if test "x$snmp_type" = "xnet"; then       AC_DEFINE([HAVE_NET_SNMP], 1,	         [Define if your SNMP implementation is net-snmp v5.0 or greater])    fi    SNMPSRC=snmp.c    AC_SUBST(SNMPSRC)    # hint users about the possible needed option    case `uname -s` in     *OpenBSD*)       case "$LIBS" in        *-lcrypto*) ;;	*) AC_MSG_WARN([SNMP test linked fine, but you might need to use --with-libcrypto for SNMP to work on this OS.]);;       esac ;;    esac  else    CPPFLAGS="$OCPPFLAGS"    LDFLAGS="$OLDFLAGS"  fifi# checking that we do have at least one driverif test "x$local" != "xyes"; then  if test "x$with_snmp" = "xyes"; then    AC_MSG_WARN([no native stats gathering mechanism found; will use SNMP.])  else    AC_MSG_ERROR([no statistics gathering methods found, porting needed.])  fifi# check for libraryAC_ARG_ENABLE(library,   [  --enable-library        enable build and installation of libifstat (default=no)], LIBTARGET=libifstat.a, )dnl VersionVERSION="`cat VERSION`"test -z $VERSION && VERSION="0.0"# perl -MPOSIX -e 'print strftime("%Y%m%d", localtime((stat("CVS"))[9]));'test -d CVS && VERSION="$VERSION-cvs"`date +%Y%m%d`AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version])dnl OutputAC_SUBST(VERSION)AC_SUBST(CFLAGS)AC_SUBST(CPPFLAGS)AC_SUBST(LDFLAGS)AC_SUBST(LIBTARGET)AC_OUTPUT(Makefile)