[Bug target/65837] [arm-linux-gnueabihf] lto1 target specific builtin not available

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65837

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well,

/* Return the ARM builtin for CODE.  */

tree
arm_builtin_decl (unsigned code, bool initialize_p ATTRIBUTE_UNUSED)
{
  if (code >= ARM_BUILTIN_MAX)
    return error_mark_node;

  return arm_builtin_decls[code];
}

and LTO passes in true for initialize_p ...

Thus it looks like arm is simply missing LTO support for builtins
(eventually a new symptom here because of the way we stream compiler
options now, with target attributes)