v2.11

A small minor release, driven by features proposed by @sosthene-nitrokey and @yamt, with bug fixes from @DvdGiessen, @selimkeles, and yours truly.

What's new?

• Thanks to @sosthene-nitrokey, lfs_fs_grow now supports a limited form of filesystem shrinking (#1094)

  If compiled with LFS_SHRINKNONRELOCATING, lfs_fs_grow can be used to reduce the block_count, as long is it does not require block relocation. This provides a useful path for migrating from old filesystem images created when littlefs ignored the on-disk block_count.

  Note that this is unreliable for general use. littlefs allocates blocks pseudorandomly as a part of wear-leveling, so LFS_SHRINKNONRELOCATING is unlikely to succeed even with small filesystems.

• Thanks to @yamt, make test should now work on Mac out of the box. This required linker and Makefile changes due to littlefs's test-runner quirks (#1090, #1091)

  As a side-effect, littlefs's Makefile can now compile with Clang. The only limitation being that stack measurements are currently broken. If anyone knows a good Clang alternative to GCC's -fcallgraph-info=su, feel free to create an issue (or PR if you're willing to write a bit of python).

  littlefs's Makefile can also compile with other non-Clang non-GCC compilers if you set the NO_GCC environment variable.

• @DvdGiessen fixed several bugs related to LFS_CRC (1095)

  • User provided LFS_CRCs no longer create multiple definitions if lfs_util.h is included in more than one file.
  • LFS_CRC no longer needs a trailing semicolon.

• Thanks to @selimkeles, lfs_fromle32/lfs_frombe32 no longer risk overflow on 16-bit devices (#1100)

• Found by @Hugh-Baoa, fixed a double deorphan that can occur if an mdir relocates during a remove operation (#1099)

• Thanks to @DvdGiessen, changeprefix.py no longer breaks if /tmp lives on a different filesystem (#1104)

Changes

	Code	Stack	Structs		Coverage
Default	17104 B (-0.1%)	1448 B (+0.0%)	812 B (+0.0%)	Lines	2434/2595 lines (+0.0%)
Readonly	6230 B (+0.0%)	448 B (+0.0%)	812 B (+0.0%)	Branches	1283/1616 branches (-0.0%)
Threadsafe	17956 B (-0.1%)	1448 B (+0.0%)	820 B (+0.0%)		Benchmarks
Multiversion	17176 B (-0.1%)	1448 B (+0.0%)	816 B (+0.0%)	Readed	29369693876 B (+0.0%)
Migrate	18768 B (-0.1%)	1752 B (+0.0%)	816 B (+0.0%)	Proged	1482874766 B (+0.0%)
Error-asserts	17916 B (+0.1%)	1440 B (+0.0%)	812 B (+0.0%)	Erased	1568888832 B (+0.0%)

8434536 Bumped minor version to v2.11
ba250a3 use shutil.move instead of os.rename to move file
0115cf6 gha: Dropped explicit CFLAGS from clang testing in CI
bff4dfd Added NO_GCC to allow users to explicitly disable GCC-specific flags
edaaaf8 Apply review comments
7d79423 Rename SHRINKIFCHEAP to SHRINKNONRELOCATING
7782d3d Mention that shrinking is unlikely to work
f4a1bb3 fix: added uint32_t cast to the bitshift places In 16 bit and 8 bit architectures, overflow and underflow issues were occuring while using functions lfs_frombe32 and lfs_fromle32
9b8f802 fixup! Add support for shrinking a filesystem
a3d6bec Fixed a double deorphan caused by relocation mid dir remove
0634d13 tests: Added non-reentrant variants of orphan/relocation tests
2105e50 Add support for shrinking a filesystem
b823728 lfs_crc should be static if LFS_CRC is defined
0d861b7 adapt the linker sections usage to mach-o
26bee8a drop a few unsupported CFLAGS for clang

Sponsors

A special thanks to littlefs's sponsors: @micropython, @fusedFET