build: use zstd for SDK and ImageBuilder tarballs

Compression level -19 was chosen as it provides a very good tradeoff
between compression ratio and performance, especially in multithreaded
operation.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

diff --git a/target/imagebuilder/Makefile b/target/imagebuilder/Makefile
index b463feb456eed860eb210b3c5c9328f5fa205299..5c09109150a8c0a242e96af5d12caad581ef0427 100644 (file)
--- a/target/imagebuilder/Makefile
+++ b/target/imagebuilder/Makefile
@@ -21,7 +21,7 @@ IB_IDIR:=$(patsubst $(TOPDIR)/%,$(PKG_BUILD_DIR)/%,$(STAGING_DIR_IMAGE))
 
 all: compile
 
-$(BIN_DIR)/$(IB_NAME).tar.xz: clean
+$(BIN_DIR)/$(IB_NAME).tar.zst: clean
        rm -rf $(PKG_BUILD_DIR)
        mkdir -p $(IB_KDIR) $(IB_LDIR) $(PKG_BUILD_DIR)/staging_dir/host/lib \
                $(PKG_BUILD_DIR)/target $(PKG_BUILD_DIR)/scripts $(IB_DTSDIR)
@@ -86,12 +86,12 @@ endif
        (cd $(PKG_BUILD_DIR); find staging_dir/host/bin/ $(IB_LDIR)/scripts/dtc/ -type f | \
                $(XARGS) $(SCRIPT_DIR)/bundle-libraries.sh $(PKG_BUILD_DIR)/staging_dir/host)
        STRIP=sstrip $(SCRIPT_DIR)/rstrip.sh $(PKG_BUILD_DIR)/staging_dir/host/bin/
-       $(TAR) -cf - -C $(BUILD_DIR) $(IB_NAME) | xz -T$(if $(filter 1,$(NPROC)),2,0) -zc -7e > $@
+       $(TAR) -cf - -C $(BUILD_DIR) $(IB_NAME) | zstd -T0 -19 -f -o $@
 
 download:
 prepare:
-compile: $(BIN_DIR)/$(IB_NAME).tar.xz
+compile: $(BIN_DIR)/$(IB_NAME).tar.zst
 install: compile
 
 clean: FORCE
-       rm -rf $(PKG_BUILD_DIR) $(BIN_DIR)/$(IB_NAME).tar.xz
+       rm -rf $(PKG_BUILD_DIR) $(BIN_DIR)/$(IB_NAME).tar.zst

diff --git a/target/sdk/Makefile b/target/sdk/Makefile
index 6d818347204a3cce0aecaa5fda55ac0f97b83cc9..13389c849958d5997a76442b8dcd58cffc8fe28c 100644 (file)
--- a/target/sdk/Makefile
+++ b/target/sdk/Makefile
@@ -81,7 +81,7 @@ KERNEL_FILES := $(patsubst $(TOPDIR)/%,%,$(wildcard $(addprefix $(LINUX_DIR)/,$(
 
 all: compile
 
-$(BIN_DIR)/$(SDK_NAME).tar.xz: clean
+$(BIN_DIR)/$(SDK_NAME).tar.zst: clean
        mkdir -p $(SDK_BUILD_DIR)/dl $(SDK_BUILD_DIR)/package
        $(CP) -L $(INCLUDE_DIR) $(SCRIPT_DIR) $(SDK_BUILD_DIR)/
        $(TAR) -cf - -C $(TOPDIR) \
@@ -156,13 +156,13 @@ $(BIN_DIR)/$(SDK_NAME).tar.xz: clean
        find $(SDK_BUILD_DIR) -name CVS | $(XARGS) rm -rf
        -make -C $(SDK_BUILD_DIR)/scripts/config clean
        (cd $(BUILD_DIR); \
-               tar -I 'xz -7e' -cf $@ $(SDK_NAME); \
+               tar -I 'zstd -T0 -19' -cf $@ $(SDK_NAME); \
        )
 
 download:
 prepare:
-compile: $(BIN_DIR)/$(SDK_NAME).tar.xz
+compile: $(BIN_DIR)/$(SDK_NAME).tar.zst
 install: compile
 
 clean:
-       rm -rf $(SDK_BUILD_DIR) $(BIN_DIR)/$(SDK_NAME).tar.xz
+       rm -rf $(SDK_BUILD_DIR) $(BIN_DIR)/$(SDK_NAME).tar.zst