Suppressing symbols on Linux/gcc

Hi All,

I am compiling my application using gcc on Linux. My Application is linked to 
few thirdparty libraries. What i want is that I should export only some 
specific symbols of my code as per required. Rest all symbols are to 
suppressed. The thirdparty symbols also needs to be suppressed. What ld option 
should I use for exporting only specific symbols on Linux??? 
On HP we can use -Wl+e <symbol name> option by which we can list the name of 
symbols needed to be exported. On Solaris using mapfile(-M <mapfile>) serves my 
purpose. What is the corresponding option on Linux??

Kindly advise,
Gagan