%-prepare: $(TOOLCHAIN_STAMP_DIR) $(STAGING_DIR) $(TOOL_BUILD_DIR)
@[ -f $(TOOLCHAIN_STAMP_DIR)/.toolchain_$@ ] || { \
$(TRACE) toolchain/$(patsubst %-prepare,%,$@)/prepare; \
%-prepare: $(TOOLCHAIN_STAMP_DIR) $(STAGING_DIR) $(TOOL_BUILD_DIR)
@[ -f $(TOOLCHAIN_STAMP_DIR)/.toolchain_$@ ] || { \
$(TRACE) toolchain/$(patsubst %-prepare,%,$@)/prepare; \