The command line interface for VTune Amplifier XE is a program called amplxe-cl. If you execute "amplxe-cl -help collect" you will geta volume of information among which is the following:
-search-dir=]>=. is the name of the search directory for binaries (bin), sources (src), symbols (sym), or all these file types (all). Use ':r' to perform a recursive search of all subdirectories. Use ':p' to indicate highest priority search directories (directories that should be searched prior to others, including environment paths and absolute paths). You can use these options together as ':rp'.
This is the way you specify symbol file paths on the command line. All the features available in the GUI are also available via this interface.