libc {
  GLIBC_2.0 {
    # Functions from libgcc.
    __divdi3; __moddi3; __udivdi3; __umoddi3;
  }
}
libm {
  GLIBC_2.1 {
    # A generic bug got this omitted from other configurations' version
    # sets, but we always had it.
    exp2l;
  }
}