Could you help me figure out what's missing here?
I'm trying to compile a c++ program using the OTL 4 library but I'm getting an error.  
Environment Details:
- I've installed Oracle DB XE 10G on an Ubuntu 11.04 VM.
 - SQL*Plus and the server itself is running as it should be.
 
Compile code is:
g++ -o <output>.exe <source>.cpp -I$ORACLE_HOME/rdbms/public -I$ORACLE_HOME/rdbms/demo -L$ORACLE_HOME/lib -lclntsh
Error is:
/usr/bin/ld: warning: libnnz10.so, needed by /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so, not found (try using -rpath or -rpath-link)  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `nztSetAppDefaultLocation'  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `nzos_DisableClientAuthentication'  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `nzos_Create_Ctx'  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `_intel_fast_memcpy'  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `nzgbllsm_location_shared_memory'  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `__intel_cpu_indicator'  
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `nzosSCCS_SetCRLCacheSize'  
...a whole lot more undefined references...   
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib/libclntsh.so: undefined reference to `nzssGSL_GetSecretLength'  
collect2: ld returned 1 exit status  
Notes on the error:
When I checked, the libnnz10.so exists when I looked into my $ORACLE_HOME/lib directory.