[root@gnp2b7ar ~/percona-server/Percona-Server-5.5.13-rel20.4]# find / -name libstdc++.so.6 | xargs file
/usr/sfw/lib/amd64/libstdc++.so.6:      ELF 64-bit LSB dynamic lib AMD64 Version 1, dynamically linked, not stripped
/usr/sfw/lib/libstdc++.so.6:    ELF 32-bit LSB dynamic lib 80386 Version 1, dynamically linked, not stripped, no debugging information available
/opt/gcc/lib/libstdc++.so.6:    ELF 32-bit LSB dynamic lib 80386 Version 1, dynamically linked, not stripped
/opt/local/gcc34/lib/libstdc++.so.6:    ELF 32-bit LSB dynamic lib 80386 Version 1 [FPU], dynamically linked, not stripped, no debugging information available
/opt/local/gcc44/lib/amd64/libstdc++.so.6:      ELF 64-bit LSB dynamic lib AMD64 Version 1 [SSE2 SSE CMOV FPU], dynamically linked, not stripped
/opt/local/gcc44/lib/libstdc++.so.6:    ELF 32-bit LSB dynamic lib 80386 Version 1 [FPU], dynamically linked, not stripped
[root@gnp2b7ar ~/percona-server/Percona-Server-5.5.13-rel20.4]# ldd /mysql/bin/mysqld
        libthread.so.1 =>        /lib/64/libthread.so.1
        libnsl.so.1 =>   /lib/64/libnsl.so.1
        libsocket.so.1 =>        /lib/64/libsocket.so.1
        libstdc++.so.6 =>        /opt/local/gcc44/lib/libstdc++.so.6  - wrong ELF class: ELFCLASS32
        libm.so.2 =>     /lib/64/libm.so.2
        libgcc_s.so.1 =>         /opt/local/gcc44/lib/libgcc_s.so.1  - wrong ELF class: ELFCLASS32
        libc.so.1 =>     /lib/64/libc.so.1
        libmp.so.2 =>    /lib/64/libmp.so.2
        libmd.so.1 =>    /lib/64/libmd.so.1
        libscf.so.1 =>   /lib/64/libscf.so.1
        libuutil.so.1 =>         /lib/64/libuutil.so.1
        libgen.so.1 =>   /lib/64/libgen.so.1
        libsmbios.so.1 =>        /usr/lib/64/libsmbios.so.1