Command-line Options
The following is a complete list of command-line switches available when launching julia:
| Switch | Description |
|---|---|
-v, --version | Display version information |
-h, --help | Print command-line options (this message). |
--project[={<dir>|@.}] | Set <dir> as the home project/environment. The default @. option will search through parent directories until a Project.toml or JuliaProject.toml file is found. |
-J, --sysimage <file> | Start up with the given system image file |
-H, --home <dir> | Set location of julia executable |
--startup-file={yes|no} | Load ~/.julia/config/startup.jl |
--handle-signals={yes|no} | Enable or disable Julia's default signal handlers |
--sysimage-native-code={yes|no} | Use native code from system image if available |
--compiled-modules={yes|no} | Enable or disable incremental precompilation of modules |
-e, --eval <expr> | Evaluate <expr> |
-E, --print <expr> | Evaluate <expr> and display the result |
-L, --load <file> | Load <file> immediately on all processors |
-t, --threads {N|auto} | Enable N threads; auto currently sets N to the number of local CPU threads but this might change in the future |
-p, --procs {N|auto} | Integer value N launches N additional local worker processes; auto launches as many workers as the number of local CPU threads (logical cores) |
--machine-file <file> | Run processes on hosts listed in <file> |
-i | Interactive mode; REPL runs and isinteractive() is true |
-q, --quiet | Quiet startup: no banner, suppress REPL warnings |
--banner={yes|no|auto} | Enable or disable startup banner |
--color={yes|no|auto} | Enable or disable color text |
--history-file={yes|no} | Load or save history |
--depwarn={yes|no|error} | Enable or disable syntax and method deprecation warnings (error turns warnings into errors) |
--warn-overwrite={yes|no} | Enable or disable method overwrite warnings |
-C, --cpu-target <target> | Limit usage of CPU features up to <target>; set to help to see the available options |
-O, --optimize={0,1,2,3} | Set the optimization level (default level is 2 if unspecified or 3 if used without a level) |
-g, -g <level> | Enable / Set the level of debug info generation (default level is 1 if unspecified or 2 if used without a level) |
--inline={yes|no} | Control whether inlining is permitted, including overriding @inline declarations |
--check-bounds={yes|no} | Emit bounds checks always or never (ignoring declarations) |
--math-mode={ieee,fast} | Disallow or enable unsafe floating point optimizations (overrides @fastmath declaration) |
--code-coverage={none|user|all} | Count executions of source lines |
--code-coverage | equivalent to --code-coverage=user |
--track-allocation={none|user|all} | Count bytes allocated by each source line |
--track-allocation | equivalent to --track-allocation=user |
In Julia 1.0, the default --project=@. option did not search up from the root directory of a Git repository for the Project.toml file. From Julia 1.1 forward, it does.