(gdb) break templ_dbg.cpp:4
Breakpoint 1 at 0x804870b: file templ_dbg.cpp, line 4.
(gdb) run
Starting program: /home/dima/templ_dbg 
Reading symbols from shared object read from target memory...done.
Loaded system supplied DSO at 0x50d000

Breakpoint 1, f<int> (t=@0xbfa784c4) at templ_dbg.cpp:4
4               return t+t;
(gdb) print t
$1 = (const int &) @0xbfa784c4: 5
(gdb) continue
Continuing.
10
0.6

Program exited normally.
(gdb)