For simple C or C++ programs I add this snippet at the beginning of the file:

  #if 0
  set -e; [ "$0" -nt "$0.bin" ] &&
  gcc -Wall -Wextra -pedantic -std=c99 "$0" -o "$0.bin"
  exec "$0.bin" "$@"
  #endif

Then make the file executable and you can use it like a script. All the flags are just there and visible.

However it would be preferable to just have a smart enough language tooling to do it without such tricks.