tools/lz4: add `lz4` binaries

same as `packages/liblz4` modified to be a HOST/tools type build with
unified liblz4 (this is also the dev package for liblz4)

the image initramfs generator offers the LZ4 option but there was no
executable to support it actually working

Signed-off-by: Tony Butler <spudz76@gmail.com>

4 files changed, 184 insertions, 0 deletions

diff --git a/tools/Makefile b/tools/Makefile
index c7c7d00756..46283e8d81 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -20,6 +20,9 @@ endif
 ifneq ($(CONFIG_SDK)$(CONFIG_PACKAGE_kmod-b43)$(CONFIG_BRCMSMAC_USE_FW_FROM_WL),)
   BUILD_B43_TOOLS = y
 endif
+ifneq ($(CONFIG_SDK)$(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),)
+  BUILD_LZ4_TOOLS = y
+endif
 
 tools-y += autoconf
 tools-y += autoconf-archive
@@ -61,6 +64,7 @@ tools-y += zlib
 tools-y += zstd
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(BUILD_B43_TOOLS),y) += b43-tools
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(BUILD_ISL),y) += isl
+tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(BUILD_LZ4_TOOLS),y) += lz4
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(BUILD_TOOLCHAIN),y) += gmp mpc mpfr
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(CONFIG_TARGET_apm821xx)$(CONFIG_TARGET_gemini),y) += genext2fs
 tools-$(if $(CONFIG_BUILD_ALL_HOST_TOOLS)$(CONFIG_TARGET_ath79),y) += lzma-old squashfs
diff --git a/tools/lz4/Makefile b/tools/lz4/Makefile
new file mode 100644
index 0000000000..c5d4f6f16b
--- /dev/null
+++ b/tools/lz4/Makefile
@@ -0,0 +1,49 @@
+#
+# Copyright (C) 2022 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=lz4
+PKG_VERSION:=1.9.4
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/lz4/lz4/tar.gz/v$(PKG_VERSION)?
+PKG_HASH:=0b0e3aa07c8c063ddf40b082bdf7e37a1562bda40a0ff5272957f3e987e0e54b
+
+PKG_LICENSE:=BSD-2-Clause
+PKG_LICENSE_FILES:=LICENSE lib/LICENSE
+
+HOST_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/host-build.mk
+
+# Always optimize for speed
+HOST_CFLAGS := $(filter-out -O%,$(HOST_CFLAGS)) -O3
+
+HOST_MAKE_FLAGS+=PREFIX=$(HOST_BUILD_PREFIX) \
+		 ENABLE_DOCS=1
+
+define Host/Configure
+endef
+
+define Host/Compile
+	$(call Host/Compile/Default,default)
+endef
+
+define Host/Install
+	$(call Host/Compile/Default,install)
+endef
+
+define Host/Uninstall
+	$(call Host/Compile/Default,uninstall)
+	$(call Host/Compile/Default,clean)
+endef
+
+define Host/Clean
+endef
+
+$(eval $(call HostBuild))
diff --git a/tools/lz4/patches/001-add-make-ENABLE_DOCS-configurable.patch b/tools/lz4/patches/001-add-make-ENABLE_DOCS-configurable.patch
new file mode 100644
index 0000000000..5d6dca33f3
--- /dev/null
+++ b/tools/lz4/patches/001-add-make-ENABLE_DOCS-configurable.patch
@@ -0,0 +1,60 @@
++++ a/programs/Makefile	2022-08-15 15:45:31.000000000 -0700
+--- b/programs/Makefile	2022-11-28 16:34:21.315593784 -0800
+@@ -66,6 +66,7 @@
+ MD2ROFF   = ronn
+ MD2ROFF_FLAGS = --roff --warnings --manual="User Commands" --organization="lz4 $(LZ4_VERSION)"
+ 
++ENABLE_DOCS ?= 1
+ 
+ default: lz4-release
+ 
+@@ -120,6 +121,7 @@
+ lz4c32 : $(SRCFILES)
+ 	$(CC) $(FLAGS) $^ -o $@$(EXT)
+ 
++ifeq ($(ENABLE_DOCS),1)
+ lz4.1: lz4.1.md $(LIBVER_SRC)
+ 	cat $< | $(MD2ROFF) $(MD2ROFF_FLAGS) | $(SED) -n '/^\.\\\".*/!p' > $@
+ 
+@@ -130,6 +132,7 @@
+ 
+ preview-man: clean-man man
+ 	man ./lz4.1
++endif
+ 
+ clean:
+ ifeq ($(WINBASED),yes)
+@@ -172,16 +175,19 @@
+ 
+ install: lz4
+ 	@echo Installing binaries in $(DESTDIR)$(bindir)
+-	$(INSTALL_DIR) $(DESTDIR)$(bindir)/ $(DESTDIR)$(man1dir)/
++	$(INSTALL_DIR) $(DESTDIR)$(bindir)/
+ 	$(INSTALL_PROGRAM) lz4$(EXT) $(DESTDIR)$(bindir)/lz4$(EXT)
+ 	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/lz4c$(EXT)
+ 	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/lz4cat$(EXT)
+ 	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/unlz4$(EXT)
++ifeq ($(ENABLE_DOCS),1)
+ 	@echo Installing man pages in $(DESTDIR)$(man1dir)
++	$(INSTALL_DIR) $(DESTDIR)$(man1dir)/
+ 	$(INSTALL_DATA) lz4.1 $(DESTDIR)$(man1dir)/lz4.1
+ 	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/lz4c.1
+ 	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/lz4cat.1
+ 	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/unlz4.1
++endif
+ 	@echo lz4 installation completed
+ 
+ uninstall:
+@@ -189,10 +195,12 @@
+ 	$(RM) $(DESTDIR)$(bindir)/unlz4$(EXT)
+ 	$(RM) $(DESTDIR)$(bindir)/lz4$(EXT)
+ 	$(RM) $(DESTDIR)$(bindir)/lz4c$(EXT)
++ifeq ($(ENABLE_DOCS),1)
+ 	$(RM) $(DESTDIR)$(man1dir)/lz4.1
+ 	$(RM) $(DESTDIR)$(man1dir)/lz4c.1
+ 	$(RM) $(DESTDIR)$(man1dir)/lz4cat.1
+ 	$(RM) $(DESTDIR)$(man1dir)/unlz4.1
++endif
+ 	@echo lz4 programs successfully uninstalled
+ 
+ endif
diff --git a/tools/lz4/patches/002-makefile-install-links-from-same-dir.patch b/tools/lz4/patches/002-makefile-install-links-from-same-dir.patch
new file mode 100644
index 0000000000..159dc67f1a
--- /dev/null
+++ b/tools/lz4/patches/002-makefile-install-links-from-same-dir.patch
@@ -0,0 +1,71 @@
+diff -ur a/lib/Makefile b/lib/Makefile
+--- a/lib/Makefile	2022-12-04 23:49:06.336839263 -0800
++++ b/lib/Makefile	2022-12-05 00:00:59.172307488 -0800
+@@ -195,8 +195,8 @@
+ 	$(INSTALL_PROGRAM) dll/$(LIBLZ4_EXP) $(DESTDIR)$(libdir)
+     else
+ 	$(INSTALL_PROGRAM) liblz4.$(SHARED_EXT_VER) $(DESTDIR)$(libdir)
+-	$(LN_SF) liblz4.$(SHARED_EXT_VER) $(DESTDIR)$(libdir)/liblz4.$(SHARED_EXT_MAJOR)
+-	$(LN_SF) liblz4.$(SHARED_EXT_VER) $(DESTDIR)$(libdir)/liblz4.$(SHARED_EXT)
++	(cd $(DESTDIR)$(libdir) && $(LN_SF) liblz4.$(SHARED_EXT_VER) liblz4.$(SHARED_EXT_MAJOR))
++	(cd $(DESTDIR)$(libdir) && $(LN_SF) liblz4.$(SHARED_EXT_MAJOR) liblz4.$(SHARED_EXT))
+     endif
+   endif
+ 	@echo Installing headers in $(DESTDIR)$(includedir)
+diff -ur a/Makefile b/Makefile
+--- a/Makefile	2022-12-04 23:49:06.336839263 -0800
++++ b/Makefile	2022-12-04 23:42:09.693836654 -0800
+@@ -77,12 +77,12 @@
+ 
+ .PHONY: clean
+ clean:
+-	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
+-	$(MAKE) -C $(PRGDIR) $@ > $(VOID)
+-	$(MAKE) -C $(TESTDIR) $@ > $(VOID)
+-	$(MAKE) -C $(EXDIR) $@ > $(VOID)
+-	$(MAKE) -C $(FUZZDIR) $@ > $(VOID)
+-	$(MAKE) -C contrib/gen_manual $@ > $(VOID)
++	$(MAKE) -C $(LZ4DIR) $@
++	$(MAKE) -C $(PRGDIR) $@
++	$(MAKE) -C $(TESTDIR) $@
++	$(MAKE) -C $(EXDIR) $@
++	$(MAKE) -C $(FUZZDIR) $@
++	$(MAKE) -C contrib/gen_manual $@
+ 	$(RM) lz4$(EXT)
+ 	$(RM) -r $(CMAKE_BUILD_DIR)
+ 	@echo Cleaning completed
+diff -ur a/programs/Makefile b/programs/Makefile
+--- a/programs/Makefile	2022-12-04 23:49:06.336839263 -0800
++++ b/programs/Makefile	2022-12-04 23:42:30.849582910 -0800
+@@ -138,7 +138,7 @@
+ ifeq ($(WINBASED),yes)
+ 	$(RM) *.rc
+ endif
+-	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
++	$(MAKE) -C $(LZ4DIR) $@
+ 	$(RM) core *.o *.test tmp* \
+            lz4$(EXT) lz4c$(EXT) lz4c32$(EXT) lz4-wlib$(EXT) \
+            unlz4$(EXT) lz4cat$(EXT)
+@@ -177,16 +177,16 @@
+ 	@echo Installing binaries in $(DESTDIR)$(bindir)
+ 	$(INSTALL_DIR) $(DESTDIR)$(bindir)/
+ 	$(INSTALL_PROGRAM) lz4$(EXT) $(DESTDIR)$(bindir)/lz4$(EXT)
+-	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/lz4c$(EXT)
+-	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/lz4cat$(EXT)
+-	$(LN_SF) lz4$(EXT) $(DESTDIR)$(bindir)/unlz4$(EXT)
++	(cd $(DESTDIR)$(bindir) && $(LN_SF) lz4$(EXT) lz4c$(EXT))
++	(cd $(DESTDIR)$(bindir) && $(LN_SF) lz4$(EXT) lz4cat$(EXT))
++	(cd $(DESTDIR)$(bindir) && $(LN_SF) lz4$(EXT) unlz4$(EXT))
+ ifeq ($(ENABLE_DOCS),1)
+ 	@echo Installing man pages in $(DESTDIR)$(man1dir)
+ 	$(INSTALL_DIR) $(DESTDIR)$(man1dir)/
+ 	$(INSTALL_DATA) lz4.1 $(DESTDIR)$(man1dir)/lz4.1
+-	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/lz4c.1
+-	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/lz4cat.1
+-	$(LN_SF) lz4.1 $(DESTDIR)$(man1dir)/unlz4.1
++	(cd $(DESTDIR)$(man1dir) && $(LN_SF) lz4.1 lz4c.1)
++	(cd $(DESTDIR)$(man1dir) && $(LN_SF) lz4.1 lz4cat.1)
++	(cd $(DESTDIR)$(man1dir) && $(LN_SF) lz4.1 unlz4.1)
+ endif
+ 	@echo lz4 installation completed
+