gbx3 --help
Execute a Gambas project or evaluate a Gambas expression (-e option).
Usage: gbx3 [options] <project file>] -- <arguments>]
gbx3 -e <expression>
Options:
-g enter debugging mode
-s <class> override startup class
-p <path> activate profiling and debugging mode
-k do not unload shared libraries
-H --httpd run through an embedded http server
-j disable just-in-time compiler
-t --trace dump the position of each executed line of code
-e evaluate an expression
-V --version display version
-L --license display license
-h --help display this help
You should start the ide (as in run gambas3-ide, or start via the desktop icon), then you can create a new project etc.
If anyone still experiencing the error “gbx3: unable to find startup file” or any of the missing component mentioned when running “gambas3.gambas” please see my explanation here: Can't execute gambas3 - #4 by jasongodev
Basically you need to install the missing component. In my case it is “gambas3-gb-jit”.