DOS actually does provide the fully qualified pathname to the
executable, which would be useful to make ldlinux.c32 data rather than
live inside the executable itself -- it has gotten too large.

Also, move some DOS internals -- inline functions only used inside the
dos directory -- out of libinstaller.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Pull XFS filesystem driver from Paulo Alcantara,

* 'xfs-for-hpa' of git://zytor.com/users/pcacjr/syslinux: (60 commits)
  xfs: Fix the way we check di_mode of an inode
  xfs: Cleanup previous commit
  xfs: Add xfs_readlink()
  xfs: Cleanup and remove some trailing whitespaces
  xfs: Add XFS_DINODE_FMT_BTREE support in xfs_next_extent()
  xfs: Cleanup and remove some trailing whitespaces
  xfs: Rework xfs_dir2_get_right_blk()
  xfs: cleanup unused structure
  xfs: Remove some trailing whitespaces
  xfs: Add full B+tree search support in xfs_dir2_node_find_entry()
  xfs: Add xfs_fmt_btree_find_entry()
  xfs: Fix memory leak in xfs_dir2_node_find_entry() function
  xfs: Cleanup xfs_readdir_dir2_leaf() function
  xfs: Implement xfs_readdir_dir2_node() function
  EXTLINUX: Add sanity check for XFS filesystems
  xfs: Add xfs_fmt_local_readdir() function
  xfs: Add xfs_fmt_local_find_entry() function
  xfs: Move readdir functions to another source file
  xfs: Remove trailing whitespace in xfs_dir2_isleaf() function
  xfs: Move dir2 functions to another source file
  ...

Conflicts:
	extlinux/main.c

The following conflict is a result of the fact comapi_chainboot was
only stubbed out on the 'elflink' branch but was properly marked as
obsolete in 'master'.

Conflicts:
	core/comboot.inc

__attribute__((packed)) does the wrong thing when in ms-struct
mode; this breaks compiling on mingw-w64.  Therefore force gcc struct
mode when we use packed.

This obsoletes checkin

  7d9ee65 win: Add -mno-ms-bitfields

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Just some minor cleanup

Signed-off-by: Frediano Ziglio <frediano.ziglio@citrix.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

Because ldlinux.c32 is required for Syslinux to function correctly, we
should be installing it automatically much like ldlinux.sys.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>

XFS filesystems are divided into a number of equally sized chunks called
Allocation Groups (AGs). Each AG can almost be thought of as an
individual filesystem that maintains its own's space usage.

Each AG has the following structure:
     - A super block describing the overall filesystem info
     - Free space management
     - Inode allocation and tracking

So, due to historical reasons (SGI IRIX's design of disk layouts), the
first sector in the primary AG on XFS filesystems contains the
superblock, which is a problem with bootloaders that rely on BIOSes (that
load VBRs which are located in the first sector of the partition).

This patch adds support to the EXTLINUX installer to be able to install
Syslinux in an XFS partition, but with a limitation (temporarily) of
relying on the filesystem block size being 4+ KiB, otherwise there won't
be enough space to store the Syslinux boot sector in the blank area around
the 2048 to 4096 bytes of the primary AG/superblock.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>

Oops :)

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add a --device option for scripts and expert users to override the
device detection.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>