# -*- sh -*-

transport_src_list=""

transport_hdr_list=""

transport_def_list=""

transport_result_list=""

transport_add_list=""

new_with_transport_list=`echo $with_transports | $SED 's/,/ /g;'`

new_with_out_transport_list=`echo $with_out_transports | $SED 's/,/ /g;'`

# set up the CPP command

MODULECPP="$CPP $CPPFLAGS $PARTIALTARGETFLAGS -I${srcdir} -I${srcdir}/include"

#

# Add the default transports to the list

#

if test "x$PARTIALTARGETOS" = "xmingw32" -o "x$PARTIALTARGETOS" = "xmingw32msvc"; then 

  transport_default_list="UDP TCP Alias Callback"

else

  transport_default_list="UDP TCP Alias Unix Callback"

fi

if test "x$enable_ipv6" = "xyes"; then

  transport_default_list="UDPIPv6 TCPIPv6 $transport_default_list"

fi

for i in $transport_default_list; do

  if echo " $new_with_transport_list " | $GREP " $i " >/dev/null; then

    :

  else

    transport_add_list="$i $transport_add_list"

  fi

done

new_transport_list="$transport_add_list $new_with_transport_list"

if test "x$ctor_header" = "x" ; then

   ctor_header="snmplib/transports/snmp_transport_inits.h"

fi

echo "/* This file is automatically generated by configure.  Do not modify by hand. */" > $ctor_header

while test "x$new_transport_list" != "x"; do

  future_new_transport_list=""

  for i in $new_transport_list; do

    if echo " $new_with_out_transport_list " | $GREP " $i " >/dev/null; then

      true

    else

      if test "x$enable_ipv6" != "xyes"; then

          if test "x$i" = "xUDPIPv6" -o "x$i" = "xTCPIPv6"; then

              AC_MSG_ERROR(IPv6 transports not available if IPv6 support is not enabled)

          fi

      fi

      transport_src="transports/snmp"$i"Domain.c"

      transport_hdr="snmp"$i"Domain.h"

      rel_transport_src="snmplib/"$transport_src

      rel_transport_hdr="include/net-snmp/library/"$transport_hdr

      lc_i=`echo $i | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`

      ctor_fn="netsnmp_"$lc_i"_ctor"

      if test -f "$srcdir/$rel_transport_src"; then

        transport_result_list="$transport_result_list $i"

        transport_src_list="$transport_src $transport_src_list"

        if test -f "$srcdir/$rel_transport_hdr"; then

          transport_hdr_list="$transport_hdr $transport_hdr_list"

        fi

        transport_def=`echo $i | $SED 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`

        transport_def_list="NETSNMP_TRANSPORT_"$transport_def"_DOMAIN $transport_def_list"

      else

        echo

        AC_MSG_ERROR(Cannot find file $srcdir/$rel_transport_src to support SNMP transport domain $i.)

      fi

      #---------------------

      # build a pseudo include header that includes current config and

      # system symbols:

      rm -f conftest.$ac_ext module_tmp_header.h

      AC_LANG_CONFTEST([AC_LANG_SOURCE([[

#include NETSNMP_SYSTEM_INCLUDE_FILE

#undef NETSNMP_MINIMAL_CODE

#define NET_SNMP_CONFIG_H

#undef config_require

#define config_require(foo) config_checkit_require(foo)

#undef config_error

#define config_error(foo) config_checkit_error(foo)

#include "$rel_transport_hdr"]])])

      mv conftest.$ac_ext module_tmp_header.h

      #

      # check for dependencies using config_require() macro

      #

      sub_list=`$MODULECPP module_tmp_header.h | $GREP config_checkit_require | $SED 's/.*config_checkit_require *( *\(.*\) *).*/\1/'`

      if test "x$sub_list" != "x" ; then

        for j in $sub_list ; do

	  if echo " $future_new_transport_list $new_transport_list " | $GREP " $j " > /dev/null ; then

	    :

	  else

            future_new_transport_list="$future_new_transport_list $j"

	  fi

        done

      fi

      #

      # check for errors using config_error() macro

      #

      error_list=`$MODULECPP module_tmp_header.h | $GREP config_checkit_error | $SED 's/.*config_checkit_error(\(.*\)).*/\1/g'`

      if test "x$error_list" != "x" ; then

        echo ""

        AC_MSG_ERROR($error_list)

      fi

      #

      # Check for needed constructor initialization routines to call

      #

      found=`grep $ctor_fn $srcdir/$rel_transport_src`

      if grep $ctor_fn $srcdir/$rel_transport_src > /dev/null ; then

	# we add them down below instead of here to make sure

	# config_require dependency constructors get called first.

	tr_init_list="$ctor_fn $tr_init_list"

      fi

    fi

  done # for each new transport

  new_transport_list="$future_new_transport_list"

done # while new transports exist

transport_obj_list=`echo " $transport_src_list " | $SED 's/\.c/\.o/g'`

transport_lobj_list=`echo " $transport_src_list " | $SED 's/\.c/\.lo/g'`

transport_ftobj_list=`echo " $transport_src_list " | $SED 's/\.c/\.ft/g'`

for i in $tr_init_list ; do

   echo "$i();" >> $ctor_header

done

## win32 platforms require inet_ntop etc.

if test "x$PARTIALTARGETOS" = "xmingw32" -o "x$PARTIALTARGETOS" = "xmingw32msvc" -o "x$PARTIALTARGETOS" = "xcygwin"; then

  if echo "$transport_def_list" | $GREP "IPV6" >/dev/null; then

    transport_obj_list="$transport_obj_list inet_ntop.o inet_pton.o"

    transport_lobj_list="$transport_lobj_list inet_ntop.lo inet_pton.lo"

    transport_ftobj_list="$transport_ftobj_list inet_ntop.ft inet_pton.ft"

  fi

fi

if test "x$transport_result_list" = x ; then

   AC_MSG_ERROR([No transports configured, at least one must be provided])

fi