configure.ac

dnl Process this -*-m4-*- file with autoconf to produce a configure script.

dnl Disable caching
define([AC_CACHE_LOAD],)
define([AC_CACHE_SAVE],)

AC_INIT(base/nagios.c)
AC_CONFIG_HEADER(include/config.h lib/snprintf.h lib/iobroker.h)
AC_PREFIX_DEFAULT(/usr/local/nagios)

PKG_NAME=nagios

PKG_VERSION="4.2.3.7"
PKG_HOME_URL="https://www.nagios.org/"
PKG_REL_DATE="05-29-2020"

dnl Figure out how to invoke "install" and what install options to use.
AC_PROG_INSTALL
AC_SUBST(INSTALL)

dnl What OS are we running?
AC_CANONICAL_HOST

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET
AC_PROG_LN_S
AC_PATH_PROG([STRIP],[strip],[true])

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_TIME
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(arpa/inet.h ctype.h dirent.h errno.h fcntl.h getopt.h grp.h)
AC_CHECK_HEADERS(libgen.h limits.h math.h netdb.h netinet/in.h pwd.h regex.h)
AC_CHECK_HEADERS(signal.h socket.h stdarg.h string.h strings.h sys/loadavg.h)
AC_CHECK_HEADERS(sys/mman.h sys/types.h sys/time.h sys/resource.h sys/wait.h)
AC_CHECK_HEADERS(sys/socket.h sys/stat.h sys/timeb.h sys/un.h sys/ipc.h)
AC_CHECK_HEADERS(sys/msg.h sys/poll.h syslog.h uio.h unistd.h locale.h wchar.h)
AC_CHECK_HEADERS(sys/prctl.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_STRUCT_TM
AC_STRUCT_TIMEZONE
AC_TYPE_MODE_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_SIGNAL
AC_TYPE_GETGROUPS


dnl Check for asprintf() and friends...
AC_CACHE_CHECK([for va_copy],ac_cv_HAVE_VA_COPY,[
AC_TRY_LINK([#include <stdarg.h>
va_list ap1,ap2;], [va_copy(ap1,ap2);],
ac_cv_HAVE_VA_COPY=yes,
ac_cv_HAVE_VA_COPY=no)])
if test x"$ac_cv_HAVE_VA_COPY" = x"yes"; then
    AC_DEFINE(HAVE_VA_COPY,1,[Whether va_copy() is available])
else    
    AC_CACHE_CHECK([for __va_copy],ac_cv_HAVE___VA_COPY,[
    AC_TRY_LINK([#include <stdarg.h>
    va_list ap1,ap2;], [__va_copy(ap1,ap2);],
    ac_cv_HAVE___VA_COPY=yes,
    ac_cv_HAVE___VA_COPY=no)])
    if test x"$ac_cv_HAVE___VA_COPY" = x"yes"; then
        AC_DEFINE(HAVE___VA_COPY,1,[Whether __va_copy() is available])
    fi
fi

AC_CHECK_FUNC(vsnprintf,,SNPRINTF_O=../lib/snprintf.o)
AC_CHECK_FUNC(snprintf,,SNPRINTF_O=../lib/snprintf.o)
AC_CHECK_FUNC(asprintf,,SNPRINTF_O=../lib/snprintf.o)
AC_CHECK_FUNC(vasprintf,,SNPRINTF_O=../lib/snprintf.o)
AC_CHECK_FUNCS(sigaction)

AC_CACHE_CHECK([for C99 vsnprintf],ac_cv_HAVE_C99_VSNPRINTF,[
AC_TRY_RUN([
#include <sys/types.h>
#include <stdarg.h>
void foo(const char *format, ...) { 
       va_list ap;
       int len;
       char buf[5];

       va_start(ap, format);
       len = vsnprintf(buf, 0, format, ap);
       va_end(ap);
       if (len != 5) exit(1);

       va_start(ap, format);
       len = vsnprintf(0, 0, format, ap);
       va_end(ap);
       if (len != 5) exit(1);

       if (snprintf(buf, 3, "hello") != 5 || strcmp(buf, "he") != 0) exit(1);

       exit(0);
}
main() { foo("hello"); }
],
ac_cv_HAVE_C99_VSNPRINTF=yes,ac_cv_HAVE_C99_VSNPRINTF=no,ac_cv_HAVE_C99_VSNPRINTF=cross)])
if test x"$ac_cv_HAVE_C99_VSNPRINTF" = x"yes"; then
    AC_DEFINE(HAVE_C99_VSNPRINTF,1,[Define if system has C99 compatible vsnprintf])
fi

dnl AC_CHECK_FUNC(snprintf,AC_DEFINE(HAVE_SNPRINTF),SNPRINTF_O=../common/snprintf.o)
AC_SUBST(SNPRINTF_O)


dnl Checks for library functions.
AC_SEARCH_LIBS([getservbyname],[nsl],
	[if test "$ac_cv_search_getservbyname" != "none required"; then
		SOCKETLIBS="$SOCKETLIBS -lnsl"
	fi])
AC_SEARCH_LIBS([connect],[socket],
	[if test "$ac_cv_search_connect" != "none required"; then
		SOCKETLIBS="$SOCKETLIBS -lsocket"
	fi])
AC_SUBST(SOCKETLIBS)
AC_CHECK_FUNCS(initgroups setenv strdup strstr strtoul unsetenv)

AC_MSG_CHECKING(for type of socket size)
AC_TRY_COMPILE([#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
],
[int a = send(1, (const void *) 0, (size_t) 0, (int) 0);],
[AC_DEFINE(SOCKET_SIZE_TYPE, size_t, [typedef for socket size]) AC_MSG_RESULT(size_t)],
[AC_DEFINE(SOCKET_SIZE_TYPE, int, [typedef for socket size]) AC_MSG_RESULT(int)])


dnl Solaris needs rt or posix4 libraries for nanosleep()
AC_SEARCH_LIBS(nanosleep,[rt posix4],,[
	echo "Error: nanosleep() needed for timing operations."
	exit 1
	])

case $host_os in
*bsd*|darwin*)
	root_grp=wheel
	;;
*)
	root_grp=root
	;;
esac

AC_ARG_WITH(root_group,AC_HELP_STRING([--with-root-group=<grp>],[sets group name for installing init]),root_grp=$withval)
AC_SUBST(root_grp)
INIT_OPTS="-o root -g $root_grp"
AC_SUBST(INIT_OPTS)

AC_ARG_WITH(nagios_user,AC_HELP_STRING([--with-nagios-user=<user>],[sets user name to run nagios]),nagios_user=$withval,nagios_user=nagios)
AC_ARG_WITH(nagios_group,AC_HELP_STRING([--with-nagios-group=<grp>],[sets group name to run nagios]),nagios_grp=$withval,nagios_grp=nagios)
AC_SUBST(nagios_user)
AC_SUBST(nagios_grp)
AC_DEFINE_UNQUOTED(DEFAULT_NAGIOS_USER,"$nagios_user",[user name to run nagios])
AC_DEFINE_UNQUOTED(DEFAULT_NAGIOS_GROUP,"$nagios_grp",[group name to run nagios])
INSTALL_OPTS="-o $nagios_user -g $nagios_grp"
AC_SUBST(INSTALL_OPTS)

AC_ARG_WITH(command_user,AC_HELP_STRING([--with-command-user=<user>],[sets user name for command access]),command_user=$withval,command_user=$nagios_user)
AC_ARG_WITH(command_group,AC_HELP_STRING([--with-command-group=<grp>],[sets group name for command access]),command_grp=$withval,command_grp=$nagios_grp)
AC_SUBST(command_user)
AC_SUBST(command_grp)
COMMAND_OPTS="-o $command_user -g $command_grp"
AC_SUBST(COMMAND_OPTS)

dnl Check for location of mail program
MAIL_PROG=no
AC_ARG_WITH(mail,
	AC_HELP_STRING([--with-mail=<path_to_mail>],
		[sets path to equivalent program to mail]),
	MAIL_PROG=$withval,
	MAIL_PROG=no
) 
if test x$MAIL_PROG = xno; then
	AC_PATH_PROG(MAIL_PROG,mail) 
fi 
dnl Fix for systems that don't (yet) have mail/mailx installed...
if test x$MAIL_PROG = x; then
	MAIL_PROG="/bin/mail"
fi
AC_SUBST(MAIL_PROG)

dnl Check for location of Apache conf.d directory
HTTP_CONF=no
AC_ARG_WITH(httpd_conf,
	AC_HELP_STRING([--with-httpd-conf=<path_to_conf>],
		[sets path to Apache conf.d directory]),
	HTTPD_CONF=$withval,
	HTTPD_CONF=no
) 
LN_HTTPD_SITES_ENABLED=0
if test x$HTTPD_CONF = xno; then
	if test -d /etc/httpd/conf.d; then
		HTTPD_CONF="/etc/httpd/conf.d"
	elif test -d /etc/apache2/conf.d; then
		HTTPD_CONF="/etc/apache2/conf.d"
	elif test -d /etc/apache2/sites-available; then
		HTTPD_CONF="/etc/apache2/sites-available"
		if test -d /etc/apache2/sites-enabled; then
			LN_HTTPD_SITES_ENABLED=1
		fi
	elif test -d /etc/apache2/sites-enabled; then
		HTTPD_CONF="/etc/apache2/sites-enabled"
	elif test -d /etc/apache/conf.d; then
		HTTPD_CONF="/etc/apache/conf.d"
	else
		HTTPD_CONF="/etc/httpd/conf.d"
	fi
fi 
AC_SUBST(HTTPD_CONF)
AC_SUBST(LN_HTTPD_SITES_ENABLED)

dnl Location of check result path
CHECKRESULTDIR=no
AC_ARG_WITH(checkresult-dir,
	AC_HELP_STRING([--with-checkresult-dir=<path>],
		[sets path to check results spool directory]),
	CHECKRESULTDIR=$withval,
	CHECKRESULTDIR=no
) 
if test x$CHECKRESULTDIR = xno; then
	CHECKRESULTDIR="$localstatedir/spool/checkresults"
fi 
AC_SUBST(CHECKRESULTDIR)

dnl Location of check result path
TMPDIR=no
AC_ARG_WITH(temp-dir,
	AC_HELP_STRING([--with-temp-dir=<path>],
		[sets path to temp directory]),
	TMPDIR=$withval,
	TMPDIR=no
) 
if test x$TMPDIR = xno; then
	TMPDIR="/tmp"
fi 
AC_SUBST(TMPDIR)

dnl Check for location of init scripts
init_dir=/etc/rc.d/init.d
if test -d /etc/rc.d/init.d; then
	init_dir="/etc/rc.d/init.d"
elif test -d /usr/local/etc/rc.d; then
	init_dir="/usr/local/etc/rc.d"
elif test -d /etc/rc.d; then
	init_dir="/etc/rc.d"
elif test -d /etc/init.d; then
	init_dir="/etc/init.d"
elif test -d /sbin/init.d; then
	init_dir="/sbin/init.d"
fi

dnl User can override init script location
AC_ARG_WITH(init_dir,
	AC_HELP_STRING([--with-init-dir=<path>],
		[sets directory to place init script into]),
	init_dir=$withval
)
AC_SUBST(init_dir)

dnl User can override lock file location
AC_ARG_WITH(lockfile,
	AC_HELP_STRING([--with-lockfile=<path>],
		[sets path and file name for lock file]),
	lockfile=$withval,
	lockfile=$localstatedir/nagios.lock
)
AC_SUBST(lockfile)


dnl Determine the library to be used by the iobroker

dnl epoll_*() is linux specific and was added to glibc 2.3.2, so we
dnl check for 2.4 and use epoll() if we're on that version or later.

case $host_os in
linux*)
	AC_MSG_CHECKING(for glibc at least version 2.4)
	AC_TRY_CPP(
		[
#include <stdio.h>
#if defined(__GLIBC__) && defined(__linux)
#include <features.h>
# if !__GLIBC_PREREQ(2, 4)
#  error GLIBC too old
# endif
#else
# error Not using GLIBC
#endif
		],
		[GLIBC_NEWER_2_4=1; AC_MSG_RESULT(yes)],
		[GLIBC_NEWER_2_4=0; AC_MSG_RESULT(no)]
	)
	if test $GLIBC_NEWER_2_4 -eq 1; then
		AC_CHECK_HEADER([sys/epoll.h])
	fi
	;;
esac
AC_CHECK_HEADER([sys/select.h])

AC_ARG_WITH(iobroker,
	AC_HELP_STRING([--with-iobroker=<method>],
		[specify the method to use with iobroker: epoll, poll, or select]),
	IOBROKER_METHOD=$withval,
	IOBROKER_METHOD="none"
)

case $IOBROKER_METHOD in
epoll*)
	if test $GLIBC_NEWER_2_4 -eq 1 -a x$ac_cv_header_sys_epoll_h = xyes ; then
		AC_DEFINE([IOBROKER_USES_EPOLL])
	else
		echo "\"epoll\" is not available as an iobroker method."
		echo "Please use one of the other options."
		exit 1
	fi
	;;
poll*)
	if test x$ac_cv_header_sys_poll_h = xyes -o x$ac_cv_header_poll_h = xyes ; then
		AC_DEFINE([IOBROKER_USES_POLL])
	else
		echo "\"poll\" is not available as an iobroker method."
		echo "Please use one of the other options."
		exit 1
	fi
	;;
select*)
	if test x$ac_cv_header_sys_select_h = xyes ; then
		AC_DEFINE([IOBROKER_USES_SELECT])
	else
		echo "\"select\" is not available as an iobroker method."
		echo "Please use one of the other options."
		exit 1
	fi
	;;
none*)
	if test $GLIBC_NEWER_2_4 -eq 1 -a x$ac_cv_header_sys_epoll_h = xyes ; then
		AC_DEFINE([IOBROKER_USES_EPOLL])
		IOBROKER_METHOD="epoll"
	elif test x$ac_cv_header_sys_poll_h = xyes -o x$ac_cv_header_poll_h = xyes ; then
		AC_DEFINE([IOBROKER_USES_POLL])
		IOBROKER_METHOD="poll"
	elif test x$ac_cv_header_sys_select_h = xyes ; then
		AC_DEFINE([IOBROKER_USES_SELECT])
		IOBROKER_METHOD="select"
	else
		echo "There are no available options for iobroker polling"
		exit 1
	fi
	;;
*)
		echo "\"$IOBROKER_METHOD\" is not a valid method for --with-iobroker"
		exit 1
	;;
esac

dnl Optional GD library and include paths
AC_ARG_WITH(gd-lib,
	AC_HELP_STRING([--with-gd-lib=DIR],[sets location of the gd library]),
	[
		LDFLAGS="${LDFLAGS} -L${withval}"
		LD_RUN_PATH="${withval}${LD_RUN_PATH:+:}${LD_RUN_PATH}"
	]
)
AC_ARG_WITH(gd-inc,
	AC_HELP_STRING([--with-gd-inc=DIR],[sets location of the gd include files]),
	[CFLAGS="${CFLAGS} -I${withval}"]
)


TRYGD=yep

dnl statusmap CGI enabled by default, unless users chooses not to use it
TRYSTATUSMAP=yep
AC_ARG_ENABLE(statusmap,
	AC_HELP_STRING([--disable-statusmap],
		[disables compilation of statusmap CGI]),
	TRYSTATUSMAP=nope
)


dnl statuswrl CGI enabled by default, unless users chooses not to use it
TRYSTATUSWRL=yep
AC_ARG_ENABLE(statuswrl,
	AC_HELP_STRING([--disable-statuswrl],
		[disables compilation of statuswrl (VRML) CGI]),
	TRYSTATUSWRL=nope
)

if test x$TRYSTATUSWRL = xyep; then
	AC_DEFINE_UNQUOTED(USE_STATUSWRL,,[statuswrl CGI enabled by default, unless users chooses not to use it])
	CGIEXTRAS="$CGIEXTRAS statuswrl.cgi"
fi


dnl JMD_CHECK_LIB_ORDER(LIBRARY, FUNCTION, ORDER [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
dnl              [, OTHER-LIBRARIES]]])
	AC_DEFUN([JMD_CHECK_LIB_ORDER],
	[AC_MSG_CHECKING([for $2 in -l$1 (order $3)])
	dnl Use a cache variable name containing both the library and function name,
	dnl because the test really is for library $1 defining function $2, not
	dnl just for library $1.  Separate tests with the same $1 and different $2s
	dnl may have different results.
	ac_lib_var=`echo $1['_']$2['_']$3 | sed 'y%./+-%__p_%'`
	AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
	[ac_save_LIBS="$LIBS"
	LIBS="-l$1 $6 $LIBS"
	AC_TRY_LINK(dnl
	ifelse([AC_LANG], [FORTRAN77], ,
	ifelse([$2], [main], , dnl Avoid conflicting decl of main.
[/* Override any gcc2 internal prototype to avoid an error.  */
]ifelse([AC_LANG], CPLUSPLUS, [#ifdef __cplusplus
extern "C"
#endif
])dnl
[/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char $2();
])),
	            [$2()],
	            eval "ac_cv_lib_$ac_lib_var=yes",
	            eval "ac_cv_lib_$ac_lib_var=no")
	LIBS="$ac_save_LIBS"
	])dnl
	if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
	  AC_MSG_RESULT(yes)
	  ifelse([$4], ,
	[changequote(, )dnl
	  ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
	    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
	changequote([, ])dnl
	  AC_DEFINE_UNQUOTED($ac_tr_lib)
	  LIBS="-l$1 $LIBS"
	], [$4])
	else
	  AC_MSG_RESULT(no)
	ifelse([$5], , , [$5
	])dnl
	fi
	])



dnl Should we try and detect the GD libs?
if test x$TRYGD = xyep; then

	dnl libiconv is required on some systems - tack it on if found
	AC_CHECK_LIB(iconv,main,ICONV=-liconv,)

	dnl See if the GD lib is available and supports PNG images...

	dnl GD > 1.8.3 requires the TrueType library to be present as well, so test for that first...
	JMD_CHECK_LIB_ORDER(gd,gdImagePng,1,[
			GDLIBFOUND=yep
			GDLIBS="-lgd -lttf -lpng -ljpeg -lz -lm"
			],:,[-lttf -lpng -ljpeg -lz -lm])
 
	dnl GD > 1.8.1 requires the jpeg library to be present as well, so test for that...
	if test x$GDLIBFOUND = x; then
		JMD_CHECK_LIB_ORDER(gd,gdImagePng,2,[
			GDLIBFOUND=yep
			GDLIBS="-lgd $ICONV -lpng -ljpeg -lz -lm"
        		],:,[$ICONV -lpng -ljpeg -lz -lm])
	fi

	dnl If we failed the first test, try without jpeg library
	if test x$GDLIBFOUND = x; then
		JMD_CHECK_LIB_ORDER(gd,gdImagePng,3,[
			GDLIBFOUND=yep
			GDLIBS="-lgd $ICONV -lz -lm -lpng"
		        ],:,[$ICONV -lz -lm -lpng])
	fi

	dnl We failed again, so try a different library ordering (without jpeg libs)
	if test x$GDLIBFOUND = x; then
		JMD_CHECK_LIB_ORDER(gd,gdImagePng,4,[
			GDLIBFOUND=yep
			GDLIBS="-lgd $ICONV -lpng -lz -lm"
	        	],:,[$ICONV -lpng -lz -lm])
	fi

	dnl Did we find the necessary GD libraries?
	if test x$GDLIBFOUND = x; then
		echo ""
		echo ""
		echo "*** GD, PNG, and/or JPEG libraries could not be located... *********"
		echo ""
		echo "Boutell's GD library is required to compile the statusmap, trends"
		echo "and histogram CGIs.  Get it from http://www.boutell.com/gd/, compile"
		echo "it, and use the --with-gd-lib and --with-gd-inc arguments to specify"
		echo "the locations of the GD library and include files."
		echo ""
		echo "NOTE: In addition to the gd-devel library, you'll also need to make"
		echo "      sure you have the png-devel and jpeg-devel libraries installed"
		echo "      on your system."
		echo ""
		echo "NOTE: After you install the necessary libraries on your system:"
		echo "      1. Make sure /etc/ld.so.conf has an entry for the directory in"
		echo "         which the GD, PNG, and JPEG libraries are installed."
		echo "      2. Run 'ldconfig' to update the run-time linker options."
		echo "      3. Run 'make clean' in the Nagios distribution to clean out"
		echo "         any old references to your previous compile."
		echo "      4. Rerun the configure script."
		echo ""
		echo "NOTE: If you can't get the configure script to recognize the GD libs"
		echo "      on your system, get over it and move on to other things.  The"
		echo "      CGIs that use the GD libs are just a small part of the entire"
		echo "      Nagios package.  Get everything else working first and then"
		echo "      revisit the problem.  Make sure to check the nagios-users"
		echo "      mailing list archives for possible solutions to GD library"
		echo "      problems when you resume your troubleshooting."
		echo ""
		echo "********************************************************************"
		echo ""
		echo ""

	dnl We found the GD lib!
	else
		echo "GD library was found!"
		if test x$TRYSTATUSMAP = xyep; then
			AC_DEFINE_UNQUOTED(USE_STATUSMAP,,[defined if the user chose to include status map])
			CGIEXTRAS="$CGIEXTRAS statusmap.cgi"
			AC_CHECK_LIB(gd,gdImageCreateTrueColor,
				AC_DEFINE(HAVE_GDIMAGECREATETRUECOLOR,1,
					[Define if your gd library has gdImageCreateTrueColor])) 
		fi

		dnl compile trends CGI
		AC_DEFINE_UNQUOTED(USE_TRENDS,,[compile trends CGI])
		CGIEXTRAS="$CGIEXTRAS trends.cgi"
	
		dnl compile histogram CGI
		AC_DEFINE_UNQUOTED(USE_HISTOGRAM,,[compile histogram CGI])
	        CGIEXTRAS="$CGIEXTRAS histogram.cgi"
	fi
fi

AC_ARG_WITH(cgiurl,
	AC_HELP_STRING([--with-cgiurl=<local-url>],
		[sets URL for cgi programs (do not use a trailing slash)]),
	cgiurl=$withval,
	cgiurl=/nagios/cgi-bin
)
AC_ARG_WITH(htmurl,
	AC_HELP_STRING([--with-htmurl=<local-url>],
		[sets URL for public html]),
	htmurl=$withval,
	htmurl=/nagios
)
AC_SUBST(htmurl)
AC_SUBST(cgiurl)

USE_NANOSLEEP=yes
AC_ARG_ENABLE(nanosleep,
	AC_HELP_STRING([--enable-nanosleep],
		[enables use of nanosleep (instead of sleep) in event timing]),
	USE_NANOSLEEP=$enableval,
	USE_NANOSLEEP=yes
)
if test x$USE_NANOSLEEP = xyes; then
	AC_DEFINE_UNQUOTED(USE_NANOSLEEP,,[enables use of nanosleep (instead of sleep)])
fi

USE_EVENTBROKER=yes
AC_ARG_ENABLE(event-broker,
	AC_HELP_STRING([--enable-event-broker],
		[enables integration of event broker routines]),
	USE_EVENTBROKER=$enableval,
	USE_EVENTBROKER=yes
)

BROKER_LDFLAGS=""
BROKERLIBS="";
some_dl_found="no";
if test x$USE_EVENTBROKER = xyes; then

	dnl Which loader library should we use? libtdl or dl?
	dnl Hopefully this will be portable and not give us headaches...
	AC_CHECK_HEADER(ltdl.h,[
		AC_CHECK_LIB(ltdl,lt_dlinit,[
			AC_DEFINE(HAVE_LTDL_H,,[Which loader library should we use? libtdl or dl?])
			some_dl_found="yes"
			BROKERLIBS="$BROKERLIBS -lltdl"
			])
	        ])
	if test "x$some_dl_found" != xyes; then
	AC_CHECK_HEADER(dlfcn.h,[
		AC_CHECK_LIB(dl,dlopen,[
			AC_DEFINE(HAVE_DLFCN_H,,[Which loader library should we use? libtdl or dl?])
			some_dl_found="yes"
			BROKERLIBS="$BROKERLIBS -ldl"
			])
	        ])
	fi

	dnl - Modified from www.erlang.org
	# Check how to export functions from the broker executable, needed
	# when dynamically loaded drivers are loaded (so that they can find
	# broker functions).
	# OS'es with ELF executables using the GNU linker (Linux and recent *BSD,
	# in rare cases Solaris) typically need '-Wl,-export-dynamic' (i.e. pass
	# -export-dynamic to the linker - also known as -rdynamic and some other
	# variants); some sysVr4 system(s) instead need(s) '-Wl,-Bexport'.
	# AIX 4.x (perhaps only for x>=2) wants -Wl,-bexpall,-brtl and doesn't
	# reliably return an error for others, thus we separate it out.
	# Otherwise we assume that if the linker accepts the flag, it is needed.
	AC_MSG_CHECKING(for extra flags needed to export symbols)
	case $host_os in
		aix4*|aix5*)
			BROKER_LDFLAGS="$BROKER_LDFLAGS -Wl,-bexpall,-brtl"
		;;
		bsdi*)
    			BROKER_LDFLAGS="$BROKER_LDFLAGS -rdynamic" 
	    	;;
		*)
			save_ldflags="$LDFLAGS"
			LDFLAGS=-Wl,-export-dynamic
			AC_TRY_LINK(,,[BROKER_LDFLAGS="$BROKER_LDFLAGS -Wl,-export-dynamic"], [
				LDFLAGS=-Wl,-Bexport
				AC_TRY_LINK(,,[BROKER_LDFLAGS="$BROKER_LDFLAGS -Wl,-Bexport"],
					AC_MSG_RESULT(none))])
			LDFLAGS="$save_ldflags"
		;;
	esac
	AC_SUBST(BROKER_LDFLAGS)
	AC_SUBST(BROKERLIBS)
	test "x$BROKER_LDFLAGS" != x && AC_MSG_RESULT([$BROKER_LDFLAGS])


	dnl - Modified version from www.erlang.org
	dnl - Some 12/15/05 mods made after reading http://xaxxon.slackworks.com/phuku/dl.html
	AC_MSG_CHECKING(for linker flags for loadable modules)
	case $host_os in
		solaris2*|sysv4*)
			MOD_LDFLAGS="-G"
			MOD_CFLAGS="-fPIC"
		;;
		aix4*|aix5*)
			#MOD_LDFLAGS="-G -bnoentry -bexpall"
			MOD_LDFLAGS="-G -bM:SRE -bnoentry -bexpall"
		;;
		freebsd2*)
			# Non-ELF GNU linker
			MOD_LDFLAGS="-Bshareable"
		;;
		darwin*)
			# Mach-O linker, a shared lib and a loadable
			# object file is not the same thing.
			MOD_LDFLAGS="-bundle -flat_namespace -undefined suppress"
			MOD_CFLAGS="$MOD_CFLAGS -fno-common"
		;;
		linux* | k*bsd*-gnu*)
			# assume GNU linker and ELF
			MOD_LDFLAGS="-shared"
			MOD_CFLAGS="-fPIC"
		;;
		*bsd*)
			MOD_LDFLAGS="-shared"
			MOD_CFLAGS="-fPIC"
		;;
		*)
			# assume GNU linker and ELF
			MOD_LDFLAGS="-shared"
		;;
	esac
	AC_MSG_RESULT([$MOD_LDFLAGS])
	AC_SUBST(MOD_CFLAGS)
	AC_SUBST(MOD_LDFLAGS)

	dnl - flags for compiling workers
	WORKER_CFLAGS="-I ../../include -I ../.."
	WORKER_LDFLAGS="-L ../../lib -l nagios"
	AC_SUBST(WORKER_CFLAGS)
	AC_SUBST(WORKER_LDFLAGS)

	AC_DEFINE_UNQUOTED(USE_EVENT_BROKER,,[defined to bring in the event broker objects])
	BROKER_O="broker.o nebmods.o"
	AC_SUBST(BROKER_O)
	BROKER_H="../include/broker.h ../include/nebmods.h ../include/nebmodules.h ../include/nebcallbacks.h ../include/neberrors.h"
	AC_SUBST(BROKER_H)
fi


dnl Option for compiling under CYGWIN
nagios_name=nagios
nagiostats_name=nagiostats
cygwin=no
AC_ARG_ENABLE(cygwin,
	AC_HELP_STRING([--enable-cygwin],
		[enables building under the CYGWIN environment]),
	[cygwin=$enableval]
)
if test x$cygwin = xyes; then
	CFLAGS="${CFLAGS} -DCYGWIN" 
	nagios_name=nagios.exe;
	nagiostats_name=nagiostats.exe;
fi
AC_SUBST(nagios_name)
AC_SUBST(nagiostats_name)


dnl Should predictive failure routines be compiled in?
dnl AC_ARG_ENABLE(failure-prediction,--enable-failure-prediction will enable integration with failure prediction module (NOT HERE YET!),[
dnl	AC_DEFINE_UNQUOTED(PREDICT_FAILURES)
dnl	BASEEXTRALIBS="$BASEEXTRALIBS \$(FDATALIBS)"
dnl	echo "Failure prediction routines (incomplete!) will be compiled in..."
dnl	])

dnl Find traceroute
AC_PATH_PROG(PATH_TO_TRACEROUTE,traceroute)
AC_DEFINE_UNQUOTED(TRACEROUTE_COMMAND,"$PATH_TO_TRACEROUTE",[traceroute command to use])



dnl Package directory for Solaris pkgmk (and other OSs, eventually)
dnl VERSION=`grep 1.0 include/common.h | cut -d ' ' -f 3 | sed 's/"//g'`
VERSION=$PKG_VERSION
PACKDIR=`pwd`/pkg
AC_SUBST(PACKDIR)
AC_SUBST(VERSION)
 
AC_MSG_CHECKING(for type va_list)
AC_TRY_COMPILE([#ifdef __STDC__
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#else
#include <sys/types.h>
#include <stdio.h>
#include <varargs.h>
#endif],
[va_list args;],
[AC_MSG_RESULT(yes)],
[AC_DEFINE(NEED_VA_LIST,,[defined if va_list fails to compile]) AC_MSG_RESULT(no)])

dnl Check if we should build local libtap
dnl From Nagios Plugins
dnl Have disabled autodetection of system library until later
AC_ARG_ENABLE(libtap,
  AC_HELP_STRING([--enable-libtap],
                [Enable built-in libtap for unit-testing (default: no).]),
        [enable_libtap=$enableval],
        [enable_libtap=no])
#Disabled for moment
#AM_CONDITIONAL([USE_LIBTAP_LOCAL],[test "$enable_libtap" = "yes"])

# Disabled for moment
# If not local, check if we can use the system one
#if test "$enable_libtap" != "yes" ; then
#        dnl Check for libtap, to run perl-like tests
#        AC_CHECK_LIB(tap, plan_tests,
#                enable_libtap="yes"
#                )
#fi

# Finally, define tests if we use libtap
if test "$enable_libtap" = "yes" ; then
	AC_CONFIG_SUBDIRS([tap])
	USE_LIBTAP=yes
else
	USE_LIBTAP=no
fi


AC_SUBST(USE_LIBTAP)
AC_SUBST(CGIEXTRAS)
AC_SUBST(GDLIBS)
AC_SUBST(BASEEXTRALIBS)
AC_SUBST(INITDIR)
AC_SUBST(USE_EVENTBROKER)

AC_PATH_PROG(PERL,perl)

AC_OUTPUT(Makefile lib/Makefile subst pkginfo base/Makefile common/Makefile contrib/Makefile cgi/Makefile html/Makefile module/Makefile worker/Makefile worker/ping/Makefile xdata/Makefile daemon-init t/Makefile t-tap/Makefile)


perl subst include/locations.h
perl subst html/config.inc.php


echo ""
echo "Creating sample config files in sample-config/ ..."

perl subst sample-config/nagios.cfg
perl subst sample-config/cgi.cfg
perl subst sample-config/resource.cfg
perl subst sample-config/httpd.conf
perl subst sample-config/mrtg.cfg

perl subst sample-config/template-object/templates.cfg
perl subst sample-config/template-object/commands.cfg
perl subst sample-config/template-object/timeperiods.cfg
perl subst sample-config/template-object/contacts.cfg

perl subst sample-config/template-object/localhost.cfg
perl subst sample-config/template-object/windows.cfg
perl subst sample-config/template-object/printer.cfg
perl subst sample-config/template-object/switch.cfg




dnl Review options
echo ""
echo ""
AC_MSG_RESULT([*** Configuration summary for $PKG_NAME $PKG_VERSION $PKG_REL_DATE ***:])

echo ""
echo " General Options:"
echo " -------------------------"

AC_MSG_RESULT([        Nagios executable:  $nagios_name])
AC_MSG_RESULT([        Nagios user/group:  $nagios_user,$nagios_grp])
AC_MSG_RESULT([       Command user/group:  $command_user,$command_grp])
if test x$USE_EVENTBROKER = xyes; then
AC_MSG_RESULT([             Event Broker:  yes])
else
AC_MSG_RESULT([             Event Broker:  no])
fi
AC_MSG_RESULT([        Install \${prefix}:  $prefix])
incdir=`eval echo $includedir`
if test x$incdir = x$prefix/include; then
	includedir=$prefix/include/nagios
fi
AC_MSG_RESULT([    Install \${includedir}:  $includedir])
AC_MSG_RESULT([                Lock file:  $lockfile])
AC_MSG_RESULT([   Check result directory:  $CHECKRESULTDIR])
AC_MSG_RESULT([           Init directory:  $init_dir])
AC_MSG_RESULT([  Apache conf.d directory:  $HTTPD_CONF])
AC_MSG_RESULT([             Mail program:  $MAIL_PROG])
AC_MSG_RESULT([                  Host OS:  $host_os])
AC_MSG_RESULT([          IOBroker Method:  $IOBROKER_METHOD])

echo ""
echo " Web Interface Options:"
echo " ------------------------"

AC_MSG_RESULT([                 HTML URL:  http://localhost$htmurl/])
AC_MSG_RESULT([                  CGI URL:  http://localhost$cgiurl/])
AC_MSG_RESULT([ Traceroute (used by WAP):  $PATH_TO_TRACEROUTE])

echo ""
echo ""
echo "Review the options above for accuracy.  If they look okay,"
echo "type 'make all' to compile the main program and CGIs."
echo ""