problem lo ading php extension: undefined reference to __gxx_ personalit y_v0‏

Hi, I'm having trouble loading a PHP extension that I made. When starting PHP, I get the following error: PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/libtg.so' - /usr/lib/php5/20090626/libtg.so: undefined symbol: __gxx_personality_v0 in Unknown on line 0 libtg.so is my extension. It is a wrapper around a C++ library, made using SWIG (http://www.swig.org/). I know __gxx_personality_v0 is a symbol from libstdc++, but my extension, libtg.so, is linked to libstdc++. I have confirmed this using ldd: $ ldd libtg.so linux-vdso.so.1 =>  (0x00007fff5f932000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f3fc937c000) libm.so.6 => /lib/libm.so.6 (0x00007f3fc90f9000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f3fc8ee2000) libc.so.6 => /lib/libc.so.6 (0x00007f3fc8b5f000) /lib64/ld-linux-x86-64.so.2 (0x00007f3fc98fc000) Any ideas as to why PHP is not finding this symbol, or how I can further diagnose the problem? Thanks, Nate