{
  "setjmp": {
    "LIBC_CONF_SETJMP_AARCH64_RESTORE_PLATFORM_REGISTER": {
      "value": false,
      "doc": "Avoid setjmp saving the value of x18, and longjmp restoring it. The Apple AArch64 ABI specifies that this register is reserved and should not be used"
    }
  }
}