anonymous debug symbol for -flto

[Yeting Kuo via Gcc-help <gcc-help@xxxxxxxxxxx>]

Hi all,
I compiled a simple program with -flto and I found that there are some
anonymous debug symbols in the executable.
Could someone give me some information about those anonymous debug symbols?

GCC version: 10.2.0

$ cat main.c
int main() {
  return 0;
}
$ gcc -O2 -flto main.c -g
$ nm a.out
00000035 N
00000035 N
00000035 N
...