... -MF .deps/import.Tpo -c -o import.o import.cc import.cc: In function 'int main(int, char**)': import.cc:773:31: warning: ignoring return value of 'int ftruncate(int, __off64_t)', declared with attribute warn_unused_result [-Wunused-result] import.cc: In function 'void batch_committed(int)': import....