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Based on ntfs-3g version 2015.3.14 from Tuxera. Initial Android project and "Android glue" was taken from OmniROM repository.

I've built only ntfs-3g, ntfsfix and mkntfs, but didn't test the latter. Other tools may require similar modifications to build and run. I need only ntfs-3g and ntfsfix (with -n option only) for my particular tasks.

The changes made are:

  • Original source code uses 64-bit off_t type verision, but Android NDK toolchain and libraries ignore _FILE_OFFSET_BITS=64 and _LARGEFILE_SOURCE defines. Changed to off64_t, and also switched to lseek64, pread64, pwrite64. Note: It is not good to typedef off_t as 64-bit integer before including other headers, because it has side effect, in particular, it breaks stream I/O functions in Bionic libc.
  • Bionic headers define _STRUCT_TIMESPEC, but neither st_mtime nor __timespec_defined, as Tuxera expects.
  • Bionic headers don't define obsolete S_IREAD, S_IWRITE, S_IEXEC.
  • Original sources failed to compile with IGNORE_MTAB defined.
  • Android NDK x86 libc has missing ffs() function, so I had to undefine HAVE_FFS.
  • Starting from 1.0.4, Android build is default to "noatime" option, and ignores other values ("atime", "relatime") provided from the command line.

TODO: Android file managers don't follow symlinks on user storages. I'd try to implement a mount option to resolve symlinks at the driver side, transparently for applications.