scalac(1)
scalac(1)
USER COMMANDS

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,lines,vars,notc}
"none" generates no debugging info,
"source" generates only the source file attribute,
"lines" 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
–noassert
Generate no assertions and assumptions
–verbose
Output messages about what the compiler is doing
–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,jvm-1.4,msil,cldc).
The default value is "jvm-1.4".
–migrate
Assist in migrating from Scala version 1.0.
–o <file>
Name of the output assembly (only relevant with -target:msil)
–r <path>
List of assemblies referenced by the program (only relevant with -target:msil)
–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
–resident
Compiler stays resident, files to compile are read from standard input.
–version
Print product version and exit.
–help
Print a synopsis of standard options.
–nouescape
Disable handling of \u unicode escapes

Non-Standard Options

–Xinline
Perform inlining when possible.
–Xcloselim
Perform closure elimination.
–Xdce
Perform dead code elimination
–XbytecodeRead
Enable bytecode reader.
–Xshowcls <class>
Show class info.
–Xshowobj <object>
Show object info.
–Xshowicode
Print the generated ICode.
–Xlinearizer: <Xlinearizer>
Linearizer to use (dfs,dump,normal,rpo).
The default value is "rpo".
–Xgenerics
Use generic Java types.
–Xprintpos
Print tree positions (as offsets)
–Xscript
Compile script file
–Xexperimental
enable experimental extensions
–Xplugtypes
Parse but ignore annotations in more locations
–Xkilloption
Optimizes option types
–XprintOuterMatches
Prints outer-checks caused by pattern matching

Debug Options

–debug
Output debugging messages.
–statistics
Print compiler statistics.
–explaintypes
Explain type errors in more detail.
–uniqid
Print identifiers with unique names (debugging option).
–printtypes
Print tree types (debugging option).
–prompt
Display a prompt after each error (debugging option).
–noimports
Compile without any implicit imports.
–nopredefs
Compile without any implicit predefined values.
–skip: <phases>
Skip <phases> (see below).
–check: <phases>
Check the tree after <phases> (see below).
–print: <phases>
Print out program after <phases> (see below).
–printer: <printer>
Printer to use (text,html).
The default value is "text".
–print-file <file>
Specify file in which to print trees.
–graph: <phases>
Graph the program after <phases> (see below).
–stop: <phases>
Stop after first phase in <phases> (see below).
–log: <phases>
Log operations in <phases> (see below).

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
transmatch
translate match expressions
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_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 <scala@listes.epfl.ch>.

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)

version 0.4
scalac(1)
April 18, 2007