From 5fcc6f0f19422c952db8bc4d72f324ead21232c6 Mon Sep 17 00:00:00 2001
From: Jan Hoffmann <jan@3e8.eu>
Date: Sat, 23 Jul 2022 22:53:18 +0200
Subject: [PATCH] tools: add 7z host package

Add the 7zr command line tool, which is a version of the 7z application
that only supports 7z archives.

7z is one of the two compression formats supported in H3C firmware
images (the alternative would be ARJ).

(Alternatively, the 7zr command line tool could also be built from a
current version of the public-domain LZMA SDK. That would require
repackaging the source package, as it is only provided in 7z format.)

Signed-off-by: Jan Hoffmann <jan@3e8.eu>
---
 tools/7z/Makefile | 36 ++++++++++++++++++++++++++++++++++++
 tools/Makefile    |  1 +
 2 files changed, 37 insertions(+)
 create mode 100644 tools/7z/Makefile

diff --git a/tools/7z/Makefile b/tools/7z/Makefile
new file mode 100644
index 0000000000..c94d746c64
--- /dev/null
+++ b/tools/7z/Makefile
@@ -0,0 +1,36 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=7z
+PKG_VERSION:=22.00
+PKG_SOURCE_VERSION:=2200
+
+PKG_SOURCE:=$(PKG_NAME)$(PKG_SOURCE_VERSION)-src.tar.xz
+PKG_SOURCE_URL:=https://7-zip.org/a/
+PKG_HASH:=40969f601e86aff49aaa0ba0df5ce6fd397cf7e2683a84b591b0081e461ef675
+
+# This builds the 7zr variant which supports only 7z, so no non-LGPL code should be included
+PKG_LICENSE:=LGPL-2.1-or-later
+PKG_LICENSE_FILES:=DOC/License.txt DOC/copying.txt
+
+HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/$(PKG_NAME)-$(PKG_VERSION)
+
+include $(INCLUDE_DIR)/host-build.mk
+
+TAR_CMD=$(HOST_TAR) -C $(1) $(TAR_OPTIONS)
+
+ALONE_DIR=$(HOST_BUILD_DIR)/CPP/7zip/Bundles/Alone7z
+
+define Host/Compile
+	$(MAKE) -C $(ALONE_DIR) -f makefile.gcc
+endef
+
+define Host/Install
+	$(INSTALL_DIR) $(STAGING_DIR_HOST)/bin
+	$(INSTALL_BIN) $(ALONE_DIR)/_o/7zr $(STAGING_DIR_HOST)/bin/7zr
+endef
+
+define Host/Clean
+	rm -f $(STAGING_DIR_HOST)/bin/7zr
+endef
+
+$(eval $(call HostBuild))
diff --git a/tools/Makefile b/tools/Makefile
index be1a23ed51..0d6e675d4c 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -32,6 +32,7 @@ tools-$(BUILD_TOOLCHAIN) += expat gmp mpc mpfr
 tools-$(CONFIG_TARGET_apm821xx)$(CONFIG_TARGET_gemini) += genext2fs
 tools-$(CONFIG_TARGET_ath79) += lzma-old squashfs
 tools-$(CONFIG_TARGET_mxs) += elftosb sdimage
+tools-$(CONFIG_TARGET_realtek) += 7z
 tools-$(CONFIG_TARGET_tegra) += cbootimage cbootimage-configs
 tools-$(CONFIG_USES_MINOR) += kernel2minor
 tools-$(CONFIG_USE_SPARSE) += sparse