[zstdcli] Document HAVE_LZMA and zstd-noxz

diff --git a/programs/Makefile b/programs/Makefile
index e956a7dfa8f967bf497c0627dad8b4e63be1d977..8b080d446606f8f96a9dbd6aaa7086762208d013 100644 (file)
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -178,6 +178,11 @@ zstd-nogz : ZLIBLD :=
 zstd-nogz : ZLIB_MSG := - gzip support is disabled
 zstd-nogz : zstd
 
+zstd-noxz : LZMACPP :=
+zstd-noxz : LZMALD :=
+zstd-noxz : LZMA_MSG := - xz/lzma support is disabled
+zstd-noxz : zstd
+
 
 zstd-pgo : MOREFLAGS = -fprofile-generate
 zstd-pgo : clean zstd

diff --git a/programs/README.md b/programs/README.md
index d7922a0969e4c0eb271c84fabb6911c1ab5ca51a..bd8fba069952e9ee9e54176f08d4691ec28a7246 100644 (file)
--- a/programs/README.md
+++ b/programs/README.md
@@ -24,13 +24,23 @@ There are however other Makefile targets that create different variations of CLI
 - __HAVE_ZLIB__ : `zstd` can compress and decompress files in `.gz` format.
   This is done through command `--format=gzip`.
   Alternatively, symlinks named `gzip` or `gunzip` will mimic intended behavior.
-  .gz support is automatically enabled when `zlib` library is detected at build time.
-  It's possible to disable .gz support, by either compiling `zstd-nogz` target or using HAVE_ZLIB=0 variable.
+  `.gz` support is automatically enabled when `zlib` library is detected at build time.
+  It's possible to disable `.gz` support, by either compiling `zstd-nogz` target or using HAVE_ZLIB=0 variable.
   Example : make zstd HAVE_ZLIB=0
   It's also possible to force compilation with zlib support, using HAVE_ZLIB=1.
   In which case, linking stage will fail if `zlib` library cannot be found.
   This might be useful to prevent silent feature disabling.
 
+- __HAVE_LZMA__ : `zstd` can compress and decompress files in `.xz` and `.lzma` formats.
+  This is done through commands `--format=xz` and `--format=lzma` respectively.
+  Alternatively, symlinks named `xz`, `unxz`, `lzma`, or `unlzma` will mimic intended behavior.
+  `.xz` and `.lzma` support is automatically enabled when `lzma` library is detected at build time.
+  It's possible to disable `.xz` and `.lzma` support, by either compiling `zstd-noxz` target or using HAVE_LZMA=0 variable.
+  Example : make zstd HAVE_LZMA=0
+  It's also possible to force compilation with lzma support, using HAVE_LZMA=1.
+  In which case, linking stage will fail if `lzma` library cannot be found.
+  This might be useful to prevent silent feature disabling.
+
 
 #### Aggregation of parameters
 CLI supports aggregation of parameters i.e. `-b1`, `-e18`, and `-i1` can be joined into `-b1e18i1`.