Gdb: could not load shared library symbol for linux.vdso.so.1

[jerome_isAviable]

first i had gdb-7.8.1... after i downgrade to gdb-7.7.1... but same problem, i can not see my variables in debug mode. i try to "set solib-search-path /usr/lib64/ld-linux.so.2" but gdb said that no symbol for linux was found.
i not understand what to do.
archlinux 64bits
gcc-4.9.2
qt creator-3.2.82
gdb-7.7.1 (or 7.8.1 would be great)

please, someone really know and could tell me what to do for make it running fine ?

[jerome_isAviable]

forget my post... it is the first time i use a debugger.
I didn't know that i have to put a break point....
sorry