+A common g-code laser cut dialect uses M3 and M5 for turning the laser
+on/off. For other machines (mills, routers), these codes control the
+spindle. The default configuration assumes the latter. If you have a file
+for laser and it doesn't use G0 for travel but relies on M3/M5 for
+laser on/off, you need to switch the config bit at plugins/import_gcode/laser
+before loading the file.
+
+On GUI, tick in the corresponding laser menu in File/Loader configuration.
+
+On the command line, use -c plugins/import_gcode/laser=1.
+
+If you more often use g-code files for laser than not, you can make this the
+default value in your user config.
+
+
2. build/install
+
+
2.1. Error while loading shared libraries
+
+If the above error message appears and lists librnd-* libs when executing
+camv-rnd, that means your operating system's dynamic loader is unable to
+find There are trhee common reasons for this:
+
+
camv-rnd is installed from binary and librnd is not installed. Install librnd.
+
librnd is installed from source to standard installation prefix (/usr or /usr/local); on some systems ldconfig needs to be run after installing new libs from source so that the system's dynamic loader can find the new .so files
+
librnd is installed from source to a non-standard installation prefix, e.g. installation in home directory or /opt; see INSTALL.librnd.txt for the extra steps this setup requires
+