text: #ifndef HAVE_64_BITS_H
  #define HAVE_64_BITS_H
  
  #include <stdint.h>
  
  #undef HAVE_64_BITS
  
  #if INTPTR_MAX == INT32_MAX
  # define HAVE_64_BITS 0
  #elif INTPTR_MAX >= INT64_MAX
  # define HAVE_64_BITS 1
  #else
  # error "couldn't tell if HAVE_64_BITS from INTPTR_MAX INT32_MAX INT64_MAX"
  #endif
  
  
  #endif
  