Christopher Haster 035552a858 Add version info for software library and on-disk structures ...

An annoying part of filesystems is that the software library can change
independently of the on-disk structures. For this reason versioning is
very important, and must be handled separately for the software and
on-disk parts.

In this patch, littlefs provides two version numbers at compile time,
with major and minor parts, in the form of 6 macros.

LFS_VERSION        // Library version, uint32_t encoded
LFS_VERSION_MAJOR  // Major - Backwards incompatible changes
LFS_VERSION_MINOR  // Minor - Feature additions

LFS_DISK_VERSION        // On-disk version, uint32_t encoded
LFS_DISK_VERSION_MAJOR  // Major - Backwards incompatible changes
LFS_DISK_VERSION_MINOR  // Minor - Feature additions

Note that littlefs will error if it finds a major version number that
is different, or a minor version number that has regressed.

2018-01-26 14:26:25 -06:00

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