Suppressing or Forcing Command Dependency Checking for Selected Lines

To suppress command dependency checking for a given command line, insert a question mark as the first character after the TAB.

Command dependency checking is automatically suppressed for lines containing the dynamic macro $?. This macro stands for the list of dependencies that are newer than the current target, and can be expected to differ between any two make runs.

To force make to perform command dependency checking on a line containing this macro, prefix the command line with a ! character (following the TAB).