tools/lz4: build with meson

Simplifies Makefile and speeds up compilation.

Before:
Executed in   68.00 secs    fish           external
   usr time  104.17 secs    1.33 millis  104.17 secs
   sys time    4.29 secs    0.35 millis    4.29 secs

After:
Executed in   27.98 secs    fish           external
   usr time   25.18 secs    1.32 millis   25.18 secs
   sys time    3.31 secs    0.35 millis    3.31 secs

Signed-off-by: Rosen Penev <rosenp@gmail.com>

tools/Makefile

@@ -104,6 +104,7 @@ $(curdir)/isl/compile := $(curdir)/gmp/compile
 $(curdir)/liblzo/compile := $(curdir)/cmake/compile
 $(curdir)/libressl/compile := $(curdir)/pkgconf/compile
 $(curdir)/libtool/compile := $(curdir)/automake/compile $(curdir)/missing-macros/compile
+$(curdir)/lz4/compile := $(curdir)/meson/compile
 $(curdir)/lzma-old/compile := $(curdir)/zlib/compile
 $(curdir)/lzop/compile := $(curdir)/cmake/compile $(curdir)/liblzo/compile
 $(curdir)/llvm-bpf/compile := $(curdir)/cmake/compile

tools/lz4/Makefile

@@ -17,33 +17,21 @@ PKG_HASH:=0b0e3aa07c8c063ddf40b082bdf7e37a1562bda40a0ff5272957f3e987e0e54b
 PKG_LICENSE:=BSD-2-Clause
 PKG_LICENSE_FILES:=LICENSE lib/LICENSE
 
-HOST_BUILD_PARALLEL:=1
-
 include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/meson.mk
+
+MESON_HOST_BUILD_DIR:=$(HOST_BUILD_DIR)/contrib/meson/openwrt-build
 
 # 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
+MESON_HOST_ARGS += \
+	-Ddefault_library=static \
+	-Ddebug-level=0 \
+	-Dunstable=false \
+	-Dprograms=true \
+	-Dtests=false \
+	-Dcontrib=false \
+	-Dexamples=false
 
 $(eval $(call HostBuild))