groups/120.native_runtime.group:${CXXFLAGS_CONFIGURE}: configure w/ ${DEFAULT_CXXFLAGS_RUNTIME}.
groups/dev_packages.group:${CXXFLAGS_CONFIGURE}: configure w/ $(rtl_lconcat "${DEFAULT_CXXFLAGS}" "--sysroot=${PREFIX_NATIVE}").
groups/dev_packages.group:${DEPENDS}: remove incorrect `native_packages' group-group dependency.