-O2 optimizes printf(“%s\n”, str) to puts(str)

Question

Toying around with clang, I compiled a C program containing this line:

printf(\"%s\\n\", argv[0]);

When compiling without opti

Answer 1

puts is a much smaller function than printf, executables are typically half the size. printf is only needed when converting numbers to strings for printing, you can do this using itoa()