The NDK supports all these architectures, with openmp as well since its 9th version. Use gcc (it's the compiler by default), and add -fopenmp to your NDK module's CFLAGS and LDFLAGS in yourAndroid.mk Makefile:

include $(CLEAR_VARS)
LOCAL_MODULE := yourmodule
LOCAL_SRC_FILES := yourmodule.c
LOCAL_CFLAGS += -fopenmp
LOCAL_LDFLAGS += -fopenmp
include $(BUILD_SHARED_LIBRARY)

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