AC_INIT(configure.in)

AM_CONFIG_HEADER(config.h)
AM_INIT_AUTOMAKE(docsis, 0.9.6)

AC_LANG_C
AC_PROG_CC
AM_PROG_LIBTOOL
dnl AC_PROG_YACC
AC_PROG_LEX

AC_CHECK_LIB(resolv, inet_aton)

AC_PATH_PROGS([M4], [gm4 gnum4 m4], [notfound],[/usr/local/bin:/usr/freeware/bin:/usr/gnu/bin:${prefix}/bin:${exec_prefix}/bin:$PATH] )
if test "x$M4" = "xnotfound"; then
  AC_MSG_ERROR([M4 is required])
else
  ac_m4_vers=`$M4 --version 2>/dev/null | head -1` ;
  if echo "$ac_m4_vers" | grep -q GNU; then
	AC_MSG_RESULT([   found $ac_m4_vers at $M4 ])
  else
	AC_MSG_ERROR([ GNU M4 is needed	])
  fi
fi

dnl check for bison, yacc won't help; 

AC_PATH_PROG([BISON], [bison], [notfound],
                   [$PATH:${prefix}/bin:${exec_prefix}/bin:/usr/freeware/bin:/usr/gnu/bin:/usr/local/bin:/usr/bin])
if test "x$BISON" != "xnotfound" ; then
  ac_bison_vers=`$BISON --version 2>/dev/null | head -1 | cut -d' ' -f4| awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
  if test -n "$ac_bison_vers" && test "$ac_bison_vers" -ge 1028000
  then
     YACC="${BISON} -t -d -y"
     BISON="${YACC}"
     AC_MSG_RESULT([   found bison version $ac_bison_vers, using $YACC])
     AC_DEFINE_UNQUOTED(HAVE_BISON, 1, [Defines if your system has GNU bison])
  else
     AC_MSG_ERROR([bison version >= 1.28 not found])
  fi
else
  AC_MSG_ERROR([bison not found])
fi

AC_SUBST(YACC)
AC_SUBST(BISON)

dnl NET-SNMP check by Cornel Ciocirlan.

AC_PATH_PROG([NETSNMP_CONFIG], [net-snmp-config], [/usr/libexec/net-snmp-config],
                   [$PATH:${prefix}/bin:${exec_prefix}/bin:/opt/net-snmp/bin:/usr/local/bin:/usr/bin])
if test -n "$NETSNMP_CONFIG"; then
  vers=`$NETSNMP_CONFIG --version 2>/dev/null | awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
  if test -n "$vers" && test "$vers" -ge 5000007
  then
     NETSNMP_LIBS="`$NETSNMP_CONFIG --libs`"
     NETSNMP_PREFIX="`$NETSNMP_CONFIG --prefix`"
     # Hack to allow distcheck to succeed.
     if echo "$NETSNMP_PREFIX" | grep -q "^$prefix"; then
         NETSNMP_MIBPATH="$NETSNMP_PREFIX/share/snmp/mibs"
     else
         NETSNMP_MIBPATH="${prefix}${NETSNMP_PREFIX}/share/snmp/mibs"
     fi
     NETSNMP_RPATH=
     for args in $NETSNMP_LIBS; do
          case $args in
            -L*)
               NETSNMP_RPATH="$NETSNMP_CONFIG $args"
               ;;
          esac
     done
     NETSNMP_RPATH=`echo $NETSNMP_RPATH | sed -e "s/-L/-R/g"`
     NETSNMP_CFLAGS="`$NETSNMP_CONFIG --cflags`"

     AC_MSG_RESULT([   found net-snmp version $vers])
     AC_DEFINE_UNQUOTED(HAVE_NETSNMP, 1, [Defines if your system has the net-snmp library])
  else
     AC_MSG_ERROR([You need at least net-snmp 5.0.7, get it at http://www.net-snmp.org])
  fi
fi

AC_SUBST(NETSNMP_LIBS)
AC_SUBST(NETSNMP_CFLAGS)
AC_SUBST(NETSNMP_RPATH)
AC_SUBST(NETSNMP_PREFIX)

dnl end libnetsnmp check 

dnl check for Cygwin & NSIS to build docsis_setup.exe 

AC_MSG_CHECKING([for Cygwin])
if test "x$host_os" = "xcygwin" ; then 
	AC_MSG_RESULT([ found Cygwin, trying to use NSIS to build setup.exe ])
dnl save current path in DOS format so we can substitute it in in NSIS setup script
	CYGWIN_BUILDROOT=`cygpath -w $PWD`
        NETSNMP_MIBPATH="`cygpath -d ${NETSNMP_PREFIX}/share/snmp/mibs`"
	AC_MSG_RESULT([   using build root $CYGWIN_BUILDROOT])
	AC_SUBST(CYGWIN_BUILDROOT)
	AC_SUBST(NETSNMP_MIBPATH)

	AC_PATH_PROG([MAKENSIS], [makensis], [notfound],[$PATH:$prefix/bin:/cygdrive/c/Program Files/NSIS])
	if test "x$MAKENSIS" = "xnotfound"; then
		AC_MSG_RESULT([makensis not found, no setup.exe...])
	else 
		AC_MSG_RESULT([found makensis at $MAKENSIS ... ])
	fi
else
	AC_MSG_RESULT([no])
fi

AM_CONDITIONAL(CYGWIN_BUILD, test "x$host_os" = "xcygwin")
AM_CONDITIONAL(CYGWIN_BUILD_SETUP_EXE, test "x$host_os" = "xcygwin" -a "x$MAKENSIS" != "xnotfound" )

dnl end check for NSIS

AC_OUTPUT(Makefile src/Makefile doc/Makefile examples/Makefile mibs/Makefile)