grbl/grbl — pull request #356 by chamnit (2014-02-19 14:32:31+00:00)
Title: Line number reporting as compile-time option.

- Initial installation of line number status reporting to indicate the line number block currently being executed. Enabled by a compile-time option, but requires the planner buffer to be reduced from 18 to 16 blocks, since these require int32 variables to be stored.