# yee ole top level info stuff
AM_INIT_AUTOMAKE(logtool,1.3.1)

# make sure we got a C compiler and set $(CC)
AM_PROG_CC_STDC

# process this file with autoconf to produce a configure script.
AC_INIT(src/logtool.c)

# Checks for programs.
AC_PROG_CC

# our default --prefix
AC_PREFIX_DEFAULT(/usr)

# We want the sysconfdir to be /etc/logtool unless the user explicitly specified otherwise
AC_SUBST(sysconfdir)
if test "`echo "$sysconfdir" | grep "prefix"`" ; then
sysconfdir=`echo $sysconfdir/logtool | sed s/'${prefix}'/""/g`
else
sysconfdir=$sysconfdir
fi

# monkey business for install (why doesn't configure do this sanely by default? why?
AC_PROG_INSTALL
AC_SUBST(installprog)
installprog="$INSTALL"

AC_SUBST(version)
version=1.3.1

# a bunch of stuff we're going to replace for our Makefile.in so it makes some sense.
AC_SUBST(INCLUDES)
AC_SUBST(DB_INCLUDES)
AC_SUBST(DB_LIBS)
AC_SUBST(DB_OBJS)
AC_SUBST(DB_FILE)
AC_SUBST(DB_PATH)

# by default, we want to use --with-gdbm - try to autodetect it
DB_OBJS=""
DB_LIBS=""
DB_FILE=""
DB_INCLUDES=""

AC_CHECK_HEADERS(gdbm.h,
	[
	AC_CHECK_LIB(gdbm, gdbm_open, 
    	[
		DB_OBJS="db_gdbm.o"
		DB_LIBS="-lgdbm"
		DB_FILE="/tmp/iphost.gdbm"
		DB_INCLUDES=""
	],
	[
		AC_MSG_WARN([Could not autodetect GDBM: perhaps you need to use --with-gdbm=])
	])
],
[])


# our resolver stuff
AC_ARG_WITH(resolver, 
	[
  --without-resolver      Build without the IP address resolution modules
	],
	[
	 if test "$withval" = "no" ; then
	 	AC_DEFINE(NO_RESOLVER)
		NO_RESOLVER="yes"
 	 fi
	])

# our optional args
AC_ARG_WITH(dnsdb,
	[
  --with-dnsdb=/path/file Specify a file to use for DNS name caching other 
                          than the default of /tmp/iphost.gdbm.
	],
	[
	 if test "$withval" = "yes" ; then
	   AC_MSG_ERROR([Fatal Error: you must supply a path and filename as a value.])
	 else 
	   DB_FILE="`echo "$withval" | sed -e 's/:/ /g'`"
	   if test -d $DB_FILE ; then
	   	AC_MSG_ERROR([Fatal Error: you may not specify a directory as a filename.])
	   fi
	   if test -f $DB_FILE ; then
		   echo "WARNING: $DB_FILE already exists!"
		   sleep 5
	   fi
	 fi
	])


AC_ARG_WITH(gdbm,
  [
  --with-gdbm             Build the DNS caching module to use GNU's GDBM 
                          databse library.  (enabled by default if -lgdbm
			  can be found).  
  ],
  [
      
    
    if test "$withval" = "no" ; then
      DB_INCLUDES=""
      DB_LIBS=""
      DB_OBJS=""
    else
    	AC_DEFINE(WE_USE_GDBM)
	DB_LIBS="-lgdbm"
	DB_OBJS="db_gdbm.o"
	DB_PATH=""
	DB_INCLUDES=""
	DB_PATH=`echo "$withval" | sed -e 's/:/ /g'`
	if test "$DB_PATH" != "yes" ; then
		DB_INCLUDES="-I../$DB_PATH"	    
		DB_LIBS="-L../$DB_PATH -lgdbm"
	else 
		DB_INCLUDES="$DB_INCLUDES"
		DB_LIBS="-lgdbm"
	fi
	DB_OBJS="db_gdbm.o"
    	AC_CHECK_HEADERS(gdbm.h,
    		[],
		[AC_MSG_ERROR([Fatal Error: missing header file gdbm.h])])

	    AC_CHECK_LIB(gdbm, gdbm_open, 
    		[],
		[AC_MSG_ERROR([Fatal Error: cannot link with -lgdbm])])
    fi
  ],
  [
    DB_OBJS="$DB_OBJS"
  ])


AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_HEADER_STDC

dnl Checks for header files.
AC_CHECK_HEADERS(unistd.h sysexits.h regex.h time.h,
[
],
[
	AC_MSG_ERROR([Fatal Error: required header file missing.])
])
#  -lnsl -lm

AC_CHECK_FUNCS(inet_addr,
[],
[
	AC_CHECK_LIB(nsl, inet_addr,
	[
		LIBS="-lnsl $LIBS"
	],
	[
		AC_CHECK_LIB(m, inet_addr,
		[
			LIBS="-lm $LIBS"
		],
		[
			AC_MSG_WARN([Warning: unable to find inet_addr - resolver disabled])
			AC_DEFINE(NO_RESOLVER)
			NO_RESOLVER="yes"
		])
	])
])

AC_CHECK_FUNCS(gethostbyaddr,
[],
[
	AC_CHECK_LIB(nsl, gethostbyaddr,
	[
		tvar="`echo $LIBS | grep lnsl`"
		if test "$tavr" != "" ; then
		  LIBS="-lnsl $LIBS"
		fi
	],
	[
		AC_CHECK_LIB(m, gethostbyaddr,
		[
			tvar="`echo $LIBS | grep lm`"
			if test "$tavr" != "" ; then
			  LIBS="-lm $LIBS"
			fi
		],
		[
			AC_MSG_WARN([Warning: unable to find gethostbyaddr - resolver disabled])
			AC_DEFINE(NO_RESOLVER)
			NO_RESOLVER="yes"
		])

	])
]
[])

dnl this isn't a fatal error, as we can use our own copy (we hope :)
AC_CHECK_HEADERS(getopt.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
dnl Checks for library functions.
AC_CHECK_FUNCS(strncasecmp,
[],
[
	AC_MSG_ERROR([Fatal Error: strncasecmp not available])
])

AC_CHECK_FUNCS(regcomp regexec regfree,
[],
[
	AC_MSG_ERROR([Fatal Error: regex library functions nonstandard/incomplete])
])

AC_CHECK_FUNCS(setenv,
[
	AC_DEFINE(HAVE_SETENV)
],
[])


if test "$NO_RESOLVER" = "yes" ; then
DB_OBJS=""
DB_LIBS=""
DB_INCLUDES=""
DB_FILE=""
fi

if test "$DB_OBJS" = "db_gdbm.o" ; then
AC_DEFINE(WE_USE_GDBM)
fi

AC_CONFIG_HEADER(config.h) 
AC_OUTPUT(logtool.spec src/config.h src/Makefile Makefile conf/logtool.conf doc/logtool.1 doc/logtool.txt)

echo "

Build was configured as follows:

Prefix:					$prefix
Configuration files wil be placed in:	$sysconfdir
Binaries will be placed in:		$prefix/bin
Using this install program:		$installprog
We will use the following compiler:	$CC
With the following CFLAGS:		$CFLAGS
With the following DEFS:                $DEFS 
With the following LIBS:                $LIBS
Using the following DB libraries: 	$DB_OBJS $DB_LIBS $DB_INCLUDES
And the following DB_FILE placement:	$DB_FILE"