Provided by: scala_2.9.2+dfsg-2_all 
NAME
scalac - Compiler for the Scala 2 language
SYNOPSIS
scalac [ <options> ] <source files>
PARAMETERS
<options>
Command line options. See OPTIONS below.
<source files>
One or more source files to be compiled (such as MyClass.scala).
OPTIONS
The compiler has a set of standard options that are supported on the current development environment and
will be supported in future releases. An additional set of non-standard options are specific to the
current virtual machine implementation and are subject to change in the future. Non-standard options
begin with -X.
Standard Options
-g:{none,source,line,vars,notc}
"none" generates no debugging info,
"source" generates only the source file attribute,
"line" generates source and line number information,
"vars" generates source, line number and local variable information,
"notc" generates all of the above and will not perform tail call optimization.
-nowarn
Generate no warnings
-verbose
Output messages about what the compiler is doing
-deprecation
Indicate whether source should be compiled with deprecation information; defaults to off (accepted
values are: on, off, yes and no)
Available since Scala version 2.2.1
-unchecked
Enable detailed unchecked warnings
Non variable type-arguments in type patterns are unchecked since they are eliminated by erasure
Available since Scala version 2.3.0
-classpath <path>
Specify where to find user class files (on Unix-based systems a colon-separated list of paths, on
Windows-based systems, a semicolon-separate list of paths). This does not override the built-in
("boot") search path.
The default class path is the current directory. Setting the CLASSPATH variable or using the
-classpath command-line option overrides that default, so if you want to include the current
directory in the search path, you must include "." in the new settings.
-sourcepath <path>
Specify where to find input source files.
-bootclasspath <path>
Override location of bootstrap class files (where to find the standard built-in classes, such as
"scala.List").
-extdirs <dirs>
Override location of installed extensions.
-d <directory>
Specify where to place generated class files.
-encoding <encoding>
Specify character encoding used by source files.
The default value is platform-specific (Linux: "UTF8", Windows: "Cp1252"). Executing the following
code in the Scala interpreter will return the default value on your system:
scala> new java.io.InputStreamReader(System.in).getEncoding
-target: <target>
Specify which backend to use (jvm-1.5,msil).
The default value is "jvm-1.5" (was "jvm-1.4" up to Scala version 2.6.1).
-print Print program with all Scala-specific features removed
-optimise
Generates faster bytecode by applying optimisations to the program
-explaintypes
Explain type errors in more detail.
-uniqid
Print identifiers with unique names (debugging option).
-version
Print product version and exit.
-help Print a synopsis of standard options.
Advanced Options
-Xassem <file>
Name of the output assembly (only relevant with -target:msil)
-Xassem-path <path>
List of assemblies referenced by the program (only relevant with -target:msil)
-Xcheck-null
Emit warning on selection of nullable reference
-Xdisable-assertions
Generate no assertions and assumptions
-Xexperimental
enable experimental extensions
-Xno-uescape
Disable handling of \u unicode escapes
-Xplug-types
Parse but ignore annotations in more locations
-Xplugin: <file>
Load a plugin from a file
-Xplugin-disable: <plugin>
Disable a plugin
-Xplugin-list
Print a synopsis of loaded plugins
-Xplugin-opt: <plugin:opt>
Pass an option to a plugin
-Xplugin-require: <plugin>
Abort unless a plugin is available
-Xprint: <phases>
Print out program after <phases> (see below).
-Xprint-pos
Print tree positions (as offsets)
-Xprint-types
Print tree types (debugging option).
-Xprompt
Display a prompt after each error (debugging option).
-Xresident
Compiler stays resident, files to compile are read from standard input.
-Xshow-class <class>
Show class info.
-Xshow-object <object>
Show object info.
-Xshow-phases
Print a synopsis of compiler phases.
-Xsource-reader <classname>
Specify a custom method for reading source files.
-Xscript <object>
Compile as a script, wrapping the code into object.main().
Compilation Phases
initial
initializing compiler
parse parse source files
namer create symbols
analyze
name and type analysis
refcheck
reference checking
uncurry
uncurry function types and applications
lambdalift
lambda lifter
typesasvalues
represent types as values
addaccessors
add accessors for constructor arguments
explicitouterclasses
make links from inner classes to enclosing one explicit
addconstructors
add explicit constructor for each class
tailcall
add tail-calls
wholeprog
perform whole program analysis
addinterfaces
add one interface per class
expandmixins
expand mixins by code copying
boxing makes boxing explicit
erasure
type eraser
icode generate icode
codegen
enable code generation
terminal
compilation terminated
all matches all phases
ENVIRONMENT
JAVACMD
Specify the java command to be used for running the Scala code. Arguments may be specified as
part of the environment variable; spaces, quotation marks, etc., will be passed directly to the
shell for expansion.
JAVA_HOME
Specify JDK/JRE home directory. This directory is used to locate the java command unless JAVACMD
variable set.
JAVA_OPTS
Specify the options to be passed to the java command defined by JAVACMD.
With Java 1.5 (or newer) one may for example configure the memory usage of the JVM as follows:
JAVA_OPTS="-Xmx512M -Xms16M -Xss16M"
With GNU Java one may configure the memory usage of the GIJ as follows: JAVA_OPTS="--mx512m
--ms16m"
EXAMPLES
Compile a Scala program to the current directory
scalac HelloWorld
Compile a Scala program to the destination directory classes
scalac -d classes HelloWorld.scala
Compile a Scala program using a user-defined java command
env JAVACMD=/usr/local/bin/cacao scalac -d classes HelloWorld.scala
Compile all Scala files found in the source directory src to the destination directory classes
scalac -d classes src/*.scala
EXIT STATUS
scalac returns a zero exist status if it succeeds to compile the specified input files. Non zero is
returned in case of failure.
AUTHOR
Written by Martin Odersky and other members of the Scala team.
REPORTING BUGS
Report bugs to http://lampsvn.epfl.ch/trac/scala.
COPYRIGHT
This is open-source software, available to you under a BSD-like license. See accomponying "copyright" or
"LICENSE" file for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.
SEE ALSO
fsc(1), sbaz(1), scala(1), scaladoc(1), scalap(1)