For the latest documentation on Visual Studio 2017, see Visual Studio 2017 Documentation.
You can specify one or more command modifiers preceding a command, optionally separated by spaces or tabs. As with commands, modifiers must be indented.
|@command||Prevents display of the command. Display by commands is not suppressed. By default, NMAKE echoes all executed commands. Use /S to suppress display for the entire makefile; use .SILENT to suppress display for part of the makefile.|
|–[||Turns off error checking for command. By default, NMAKE halts when a command returns a nonzero exit code. If –|
|! command||Executes command for each dependent file if command uses $** (all dependent files in the dependency) or $? (all dependent files in the dependency with a later timestamp than the target).|