Undefined symbols

Hi, Sorry if this isn't the right place to ask. If it isn't, could someone please tell me where I can ask such questions... I'm attempting to write a PHP extension to load as an external DSO. I've got the extension to build and load using dl(), but when I call a method from it, the httpd running the request dies. The Apache error logs report the following: /usr/local/apache/bin/httpd: error in loading shared libraries: /usr/local/lib/php/extensions/no-debug-non-zts-20001222/php_id3.so: undefined symbol: __7ID3_TagPCc __7ID3_TagPCc is the mangled name for the ID3_Tag class's constructor located in another DSO (libid3.so, in /usr/lib) that I am linking against. My config.m4 file is listed below. Are there any changes that should be made to get this to work? > dnl $Id: config.m4,v 1.5 2001/07/13 17:32:27 bootc Exp $ > dnl config.m4 for extension id3 > > PHP_ARG_WITH(id3, for id3 support, > [ --with-id3 Include id3 support]) > > if test "$PHP_ID3" != "no"; then > # --with-id3 -> check with-path > SEARCH_PATH="/usr/local /usr" > SEARCH_FOR="/include/id3.h" > if test -r $PHP_ID3/; then # path given as parameter > ID3_DIR=$PHP_ID3 > else # search default path list > AC_MSG_CHECKING(for id3 files in default path) > for i in $SEARCH_PATH ; do > if test -r $i/$SEARCH_FOR; then > ID3_DIR=$i > AC_MSG_RESULT(found in $i) > fi > done > fi > > if test -z "$ID3_DIR"; then > AC_MSG_RESULT(not found) > AC_MSG_ERROR(Please reinstall the id3 distribution) > fi > > # --with-id3 -> add include path > PHP_ADD_INCLUDE($ID3_DIR/include) > > # --with-id3 -> add the libraries > PHP_ADD_LIBRARY_WITH_PATH(id3, $ID3_DIR/lib) > PHP_ADD_LIBRARY(z) > > PHP_EXTENSION(id3, $ext_shared) > PHP_REQUIRE_CXX > fi Thanks, -- Chris Boot bootc@worldnet.fr