Provided by: scala_2.11.12-5_all bug

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).

DESCRIPTION

       The  scalac  tool  reads  class  and  object definitions, written in the Scala programming
       language, and compiles them into bytecode class files.

       By default, the compiler puts each class file in the same directory as  its  source  file.
       You can specify a separate destination directory with -d (see OPTIONS, below).

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
       -Dproperty=value
              Pass -Dproperty=value  directly to the runtime system.

       -J<flag>
              Pass <flag> directly to the runtime system.

       -P:<plugin:opt>
              Pass an option to a plugin

       -X     Print a synopsis of advanced options.

       -bootclasspath <path>
              Override location of bootstrap class files (where to  find  the  standard  built-in
              classes, such as "scala.List").

       -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-separated 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.

       -d <directory|jar>
              Specify where to place generated class files.

       -deprecation
              Emit warning and location for usages of deprecated APIs.

              Available since Scala version 2.2.1

       -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

       -explaintypes
              Explain type errors in more detail.

       -extdirs <dirs>
              Override location of installed extensions.

       -feature
              Emit  warning  and  location  for  usages  of  features  that  should  be  imported
              explicitly.

       -g:{none,source,line,vars,notailcalls}
              "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,

              "notailcalls"   generates  all  of  the  above  and  will  not  perform  tail  call
              optimization.

       -help  Print a synopsis of standard options.

       -javabootclasspath <path>
              Override Java boot classpath.

       -javaextdirs <path>
              Override Java extdirs classpath.

       -language:<feature>
              Enable one or more language features.

       -no-specialization
              Ignore @specialize annotations.

       -nobootcp
              Do not use the boot classpath for the Scala jar files.

       -nowarn
              Generate no warnings

       -optimise
              Generates faster bytecode by applying optimisations to the program.

       -print Print program with all Scala-specific features removed.

       -sourcepath <path>
              Specify location(s) of source files.

       -target:{jvm-1.5,jvm-1.6,jvm-1.7,jvm-1.8}
              "jvm-1.5" target JVM 1.5 (deprecated),

              "jvm-1.6" target JVM 1.6 (default),

              "jvm-1.7" target JVM 1.7,

              "jvm-1.8" target JVM 1.8,

       -toolcp <path>
              Add to the runner classpath.

       -unchecked
              Enable detailed unchecked (erasure) warnings

              Non  variable  type-arguments  in  type  patterns  are  unchecked  since  they  are
              eliminated by erasure

              Available since Scala version 2.3.0

       -uniqid
              Uniquely tag all identifiers in debugging output.

       -usejavacp
              Utilize the java.class.path in classpath resolution.

       -usemanifestcp
              Utilize the manifest in classpath resolution.

       -verbose
              Output messages about what the compiler is doing

       -version
              Print product version and exit.

       @<file>
              A text file containing compiler arguments (options and source files)

   Advanced Options
       -Xcheckinit
              Wrap field accessors to throw an exception on uninitialized access.

       -Xdev  Enable warnings for developers working on the Scala compiler

       -Xdisable-assertions
              Generate no assertions and assumptions

       -Xelide-below <n>
              Calls to @elidable methods are omitted if method priority is lower than argument.

       -Xexperimental
              Enable experimental extensions

       -Xfatal-warnings
              Fail the compilation if there are any warnings.

       -Xfull-lubs
              Retain pre 2.10 behavior of less aggressive truncation of least upper bounds.

       -Xfuture
              Turn on future language features.

       -Xgenerate-phase-graph <file>
              Generate the phase graphs (outputs .dot files) to fileX.dot.

       -Xlint Enable recommended additional warnings.

       -Xlog-free-terms
              Print a message when reification creates a free term.

       -Xlog-free-types
              Print a message when reification resorts to generating a free type.

       -Xlog-implicit-conversions
              Print a message whenever an implicit conversion is inserted.

       -Xlog-implicits
              Show more detail on why some implicits are not applicable.

       -Xlog-reflective-calls
              Print a message when a reflective method call is generated.

       -Xmacro-settings:<option>
              Custom settings for macros.

       -Xmain-class <path>
              Class for manifest's Main-Class entry (only useful with -d <jar>).

       -Xmax-classfile-name <n>
              Maximum filename length for generated classes.

       -Xmigration:<version>
              Warn about constructs whose behavior may have changed since<version>.

       -Xno-forwarders
              Do not generate static forwarders in mirror classes.

       -Xno-patmat-analysis
              Don't   perform   exhaustivity/unreachability   analysis.   Also,   ignore  @switch
              annotation.

       -Xno-uescape
              Disable handling of \u unicode escapes

       -Xnojline
              Do not use JLine for editing.

       -Xplugin:<paths>
              Load a plugin from each classpath.

       -Xplugin-disable:<plugin>
              Disable plugins by name.

       -Xplugin-list
              Print a synopsis of loaded plugins.

       -Xplugin-require:<plugin>
              Abort if a named plugin is not loaded.

       -Xpluginsdir <path>
              Path to search for plugin archives.

       -Xprint:<phases>
              Print out program after <phases> (see below).

       -Xprint-icode[:<phases>]
              Log internal icode to *.icode files after<phases> (default: icode).

       -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.

       -Xscript <object>
              Treat the source file as a script and wrap it in a main method.

       -Xshow-class <class>
              Show internal representation of class.

       -Xshow-object <object>
              Show internal representation of object.

       -Xshow-phases
              Print a synopsis of compiler phases.

       -Xsource:<version>
              Treat compiler input as Scala source for the specified version, see SI-8126.

       -Xsource-reader <classname>
              Specify a custom method for reading source files.

       -Xstrict-inference
              Don't infer known-unsound types.

       -Xverify
              Verify generic signatures in generated bytecode (asm backend only).

       -Xxml:{coalescing}
              Configure XML parsing.

              "coalescing" convert PCData to Text and coalesce sibling nodes (default in 2.11).

       -Y     Print a synopsis of private options.

   Compilation Phases
       parser parse source into ASTs, perform simple desugaring

       namer  resolve names, attach symbols to named trees

       packageobjects
              load package objects

       typer  the meat and potatoes: type the trees

       patmat translate match expressions

       superaccessors
              add super accessors in traits and nested classes

       extmethods
              add extension methods for inline classes

       pickler
              serialize symbol tables

       refchecks
              reference/override checking, translate nested objects

       selectiveanf
              ANF pre-transform for @cps (CPS plugin)

       selectivecps
              @cps-driven transform of selectiveanf assignments (CPS plugin)

       uncurry
              uncurry, translate function values to anonymous classes

       tailcalls
              replace tail calls by jumps

       specialize
              @specialized-driven class and method specialization

       explicitouter
              this refs to outer pointers, translate patterns

       erasure
              erase types, add interfaces for traits

       posterasure
              clean up erased inline classes

       lazyvals
              allocate bitmaps, translate lazy vals into lazified defs

       lambdalift
              move nested functions to top level

       constructors
              move field definitions into constructors

       flatten
              eliminate inner classes

       mixin  mixin composition

       cleanup
              platform-specific cleanups, generate reflective calls

       delambdafy
              remove lambdas

       icode  generate portable intermediate code

       inliner
              optimization: do inlining

       inlineHandlers
              optimization: inline exception handlers

       closelim
              optimization: eliminate uncalled closures

       constopt
              optimization: optimize null and other constants

       dce    optimization: eliminate dead code

       jvm    generate JVM bytecode

       terminal
              the last phase in the compiler chain

       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"

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 https://issues.scala-lang.org/.

COPYRIGHT

       This is open-source software, available to you under a BSD-like license. See  accompanying
       "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), scala(1), scaladoc(1), scalap(1)