编译除 -o 外没有其他标志的 C 代码

Question

Im doing an assignment and the requirement instruction say "Your code should compile correctly (no warnings and errors) with no flags other -o. you should compile your code to a debug-able executable without producing any warnings or error messages. (Note that -O and -o are different flags.)"

So Im so confused what does the " no flags other -o " means. As far as I know, "flag is a general tool for rudimentary signalling and identification, especially in environments where communication is similarly challenging.", so does the requirement mean that we can't use any for loop ?

Answer 1

No, the requirement is referring to command-line flags, ie options to the compiler. Eg, assuming gcc, gcc -o foo foo.c .

However, since the program is meant to be debuggable, the requirements are contradictory because creating a debuggable executable requires (for gcc) the -g flag.

Answer 2

On many compilers, you can control the warning level with flags. The requirement here is to not use those flags, yet raise no warning.

Said differently, you are just asked to write neat and clean C code using no specific extension nor any semi valid constructs (code not conforming to the standard but accepted with warnings by a compiler)