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8 …all [standard conventions](https://www.gnu.org/prep/standards/html_node/Makefile-Conventions.html),
13 - `lz4` : default CLI, with a command line syntax close to gzip
14 - `lz4c` : Same as `lz4` with additional support legacy lz4 commands (incompatible with gzip)
15 - `lz4c32` : Same as `lz4c`, but forced to compile in 32-bits mode
17 The CLI generates and decodes [LZ4-compressed frames](../doc/lz4_Frame_format.md).
21 CLI supports aggregation of parameters i.e. `-b1`, `-e18`, and `-i1` can be joined into `-b1e18i1`.
25 CLI includes in-memory compression benchmark module for lz4.
31 One can select compression levels starting from `-b` and ending with `-e`.
32 The `-i` parameter selects a number of seconds used for each of tested levels.
37 The full list of commands can be obtained with `-h` or `-H` parameter:
43           with no FILE, or when FILE is - or stdin, read standard input
45  -1     : Fast compression (default)
46  -9     : High compression
47  -d     : decompression (default for .lz4 extension)
48  -z     : force compression
49  -D FILE: use FILE as dictionary
50  -f     : overwrite output without prompting
51  -k     : preserve source files(s)  (default)
52 --rm    : remove source file(s) after successful de/compression
53  -h/-H  : display help/long help and exit
56  -V     : display Version number and exit
57  -v     : verbose mode
58  -q     : suppress warnings; specify twice to suppress errors too
59  -c     : force write to standard output, even if it is the console
60  -t     : test compressed file integrity
61  -m     : multiple input files (implies automatic output filenames)
62  -r     : operate recursively on directories (sets also -m)
63  -l     : compress using Legacy format (Linux kernel compression)
64  -B#    : cut file into blocks of size # bytes [32+]
65                      or predefined block size [4-7] (default: 7)
66  -BD    : Block dependency (improve compression ratio)
67  -BX    : enable block checksum (default:disabled)
68 --no-frame-crc : disable stream checksum (default:enabled)
69 --content-size : compressed frame includes original size (default:not present)
70 --[no-]sparse  : sparse mode (default:enabled on file, disabled on stdout)
71 --favor-decSpeed: compressed files decompress faster, but are less compressed
72 --fast[=#]: switch to ultra fast compression level (default: 1)
75  -b#    : benchmark file(s), using # compression level (default : 1)
76  -e#    : test all compression levels from -bX to # (default : 1)
77  -i#    : minimum evaluation time in seconds (default : 3s)```
82 All files in this directory are licensed under GPL-v2.