[Buildroot] [PATCH] squashfs: Add lz4 hc compression

[Matthias Weisser]

lz4 offers a high compression mode. A minimalistic file system shrinks by about 15%.

Signed-off-by: Matthias Weisser <m.weisser.m at gmail.com>
---
 fs/squashfs/Config.in   | 3 +++
 fs/squashfs/squashfs.mk | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/fs/squashfs/Config.in b/fs/squashfs/Config.in
index ca9ddb2..94e126e 100644
--- a/fs/squashfs/Config.in
+++ b/fs/squashfs/Config.in
@@ -18,6 +18,9 @@ config BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
 config BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
 	bool "lz4"
 
+config BR2_TARGET_ROOTFS_SQUASHFS4_LZ4_HC
+	bool "lz4hc"
+
 config BR2_TARGET_ROOTFS_SQUASHFS4_LZMA
 	bool "lzma"
 
diff --git a/fs/squashfs/squashfs.mk b/fs/squashfs/squashfs.mk
index 446906f..528e0f7 100644
--- a/fs/squashfs/squashfs.mk
+++ b/fs/squashfs/squashfs.mk
@@ -9,6 +9,9 @@ ROOTFS_SQUASHFS_DEPENDENCIES = host-squashfs
 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZ4),y)
 ROOTFS_SQUASHFS_ARGS += -comp lz4
 else
+ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZ4_HC),y)
+ROOTFS_SQUASHFS_ARGS += -comp lz4 -Xhc
+else
 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZO),y)
 ROOTFS_SQUASHFS_ARGS += -comp lzo
 else
@@ -23,6 +26,7 @@ endif
 endif
 endif
 endif
+endif
 
 define ROOTFS_SQUASHFS_CMD
 	$(HOST_DIR)/usr/bin/mksquashfs $(TARGET_DIR) $@ -noappend \
-- 
2.1.4