1RULE_LAUNCH_CUSTOM 2------------------ 3 4Specify a launcher for custom rules. 5 6:ref:`Makefile Generators` and the :generator:`Ninja` generator prefix 7custom commands with the given launcher command line. 8This is intended to allow launchers to intercept build problems 9with high granularity. Other generators ignore this property 10because their underlying build systems provide no hook to wrap 11individual commands with a launcher. 12