lz4: Migrate to using meson and fix Debug build with gcc <= 4.9.x (#6727)

Author: th0ma7

cross/lz4/Makefile

@@ -4,17 +4,26 @@ PKG_EXT = tar.gz
 PKG_DIST_NAME = v$(PKG_VERS).$(PKG_EXT)
 PKG_DIST_SITE = https://github.com/lz4/lz4/archive
 PKG_DIST_FILE = $(PKG_NAME)-$(PKG_VERS).$(PKG_EXT)
-PKG_DIR = $(PKG_NAME)-$(PKG_VERS)/build/cmake
+PKG_DIR = $(PKG_NAME)-$(PKG_VERS)
 
 DEPENDS =
 
 HOMEPAGE = https://github.com/lz4/lz4
 COMMENT  = LZ4 is lossless compression algorithm, providing compression speed at 400 MB/s per core, scalable with multi-cores CPU.
 LICENSE  = BSD
 
-include ../../mk/spksrc.cross-cmake.mk
+MESON_BASE_DIR = $(WORK_DIR)/$(PKG_DIR)/build/meson
+
+include ../../mk/spksrc.common.mk
 
-include ../../mk/spksrc.archs.mk
 ifeq ($(findstring $(ARCH),$(ARMv5_ARCHS) $(OLD_PPC_ARCHS)),$(ARCH))
 ADDITIONAL_LDFLAGS += -lrt
 endif
+
+ifeq ($(GCC_DEBUG_INFO),1)
+ifeq ($(call version_lt, $(TC_GCC), 5.0),1)
+ADDITIONAL_CFLAGS = -std=c99
+endif
+endif
+
+include ../../mk/spksrc.cross-meson.mk