PKG_CFLAGS = $(SHLIB_OPENMP_CFLAGS)
PKG_LIBS = $(SHLIB_OPENMP_CFLAGS)

#%.o: %.c
#	$(CC) -std=c11 -I"$(R_INCLUDE_DIR)" -DNDEBUG -fPIC -fopenmp -O2 -c $< -o $@