#define set_convert_var(X) do { if(mode != MODE_CONVERT) {\
fprintf(stderr, "please use option --%s after --convert option\n",\
long_options[option_index].name);\
#define set_convert_var(X) do { if(mode != MODE_CONVERT) {\
fprintf(stderr, "please use option --%s after --convert option\n",\
long_options[option_index].name);\