esp-idf/components/cxx/component.mk

kopia lustrzana https://github.com/espressif/esp-idf
# Mark __cxa_guard_dummy as undefined so that implementation of static guards 
# is taken from cxx_guards.o instead of libstdc++.a
COMPONENT_ADD_LDFLAGS := -l$(COMPONENT_NAME) -u __cxa_guard_dummy
cxx: implement static initialization guards 2017-01-04 16:25:55 +00:00			`# Mark __cxa_guard_dummy as undefined so that implementation of static guards`
			`# is taken from cxx_guards.o instead of libstdc++.a`
			`COMPONENT_ADD_LDFLAGS := -l$(COMPONENT_NAME) -u __cxa_guard_dummy`