TODO:
Add flags for:
  -debug
  -no_dos_header
Add support for:
- Remove empty __IMPORT segment

Changes for the 4.26 release (the cctools-717 release):
- Added the -d filename option to mtoc(1) which adds a debug directory entry
  in the .debug section with the file name.  Radar bug #6211642.

Changes for the 4.26 release (the cctools-716 release):
- Fixed bugs in mtoc(1) in create_32bit_symbol_table() and
  create_64bit_symbol_table() that was not ignoring stabs with the N_STAB bits
  set when checking for undefined symbols.  Radar bug #6194828.

Changes for the 4.26 release (the cctools-715 release):
- Changed mtoc(1) to remove the HACK_ARM_F_MAGIC_TO_BE_I386 define and code so
  now the f_magic field for arm gets set to IMAGE_FILE_MACHINE_ARM (0x01c0).
  Radar bug #6163015.

Changes for the 4.26 release (the cctools-705 release):
- Ported mtoc.c to run on 64-bit hosts by changing unsigned long to uint32_t and
  SWAP_LONG to SWAP_INT.  Radar bug #6022298.

Changes for the 5.26 release (the cctools-701 release):
- Added the -align option to mtoc(1) to set the file and segment alignment.

Changes for the 5.26 release (the cctools-699 release):
- Fixed a problem with the SizeOfImage field in the aouthdr not including the
  "zerofill" part of the sections.  This is also include in the bsize which
  causes it to be included in the SizeOfImage.  Also removed the check to
  require the section alignment to be greater or equal to the file alignment.

Changes for the 5.25 release (the cctools-688 release):
- Fixed a problem in mtoc(1) selection of the address for the .reloc PECOFF
  section.  To work around the unified linker incorrectly producing a LINKEDIT
  segment the code in process_32bit_arch() and process_64bit_arch() needed to
  ingore this segment when selecting the address.

Changes for the 5.25 release (the cctools-687 release):
- Added 64-bit checking for undefined symbols. 

Changes for the 5.25 release (the cctools-686 release):
- Added the "-section_alignment <hex_value>" option.  This should be passed the
  same value as passed to the linker in the -segalign value when creating the
  Mach-O file. This value is used to layout the added .reloc section and set
  into the PECOFF aouthdr.
- Added a check to make sure the headers are not mapped on top of its sections. 
  If it does you get an error message saying the Mach-O needed to be relinked
  and the -seg1addr value to use.
- Added alternate names for the subsystem arguments.
- Added checking for undefined symbols (32-bit only).

Changes for the 5.25 release (the cctools-685 release):
- Updated mtoc(1) to deal with MH_EXECUTE file types and MH_PIE flag.

Changes for the 5.25 release (the cctools-681 release):
- Added the new mtoc(1) program to the cctools project.  Radar bug #5536661.
  - The -e entry_point is a temporary hack until 64-bit files are produced
    with MH_PRELOAD and have an entry point in the thread command.
- The makerelocs(1) program in here is not installed as it would overwrite the
  existing one in the efitools project.  But this one could replace it but the
  new mtoc(1) program includes that and makes it obsolete.  But is useful to
  test with.