Recent versions of GDB can't load shared library symbols for /lib64/ld-linux-x86-64.so.2.

[cedric-vincent]

How to reproduce (host system is Slackware64-current):

$ proot gdb ./a.out
GNU gdb (GDB) 7.8
[...]
(gdb) break main
Breakpoint 1 at 0x400629
(gdb) run
Starting program: a.out
warning: Could not load shared library symbols for /lib64/ld-linux-x86-64.so.2.
Do you need "set solib-search-path" or "set sysroot"?