fsc(1)								   USER COMMANDS							    fsc(1)

NAME

       fsc - Fast offline compiler for the Scala 2 language

SYNOPSIS

       fsc  [ <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 offline compiler supports all options of scalac plus the following:

       -reset Reset compile server caches.

       -shutdown
	      Shut  down  the  compilation  daemon.   The  daemon  attempts  to restart itself as necessary, but sometimes an explicit shutdown is
	      required. A common example is if jars on the class path have changed.

       -server <hostname:portnumber>
	      Specify compile server host at port number.  Usually this option is not needed.  Note that the hostname must  be	for  a	host  that
	      shares the same filesystem.

       -J <flag>
	      Pass <flag> directly to the Java VM for the compilation daemon.

DESCRIPTION

       The fsc tool submits Scala compilation jobs to a compilation daemon. The first time it is executed, the daemon is started automatically. On
       subsequent runs, the same daemon can be reused, thus resulting in a faster compilation. The tool is especially  effective  when	repeatedly
       compiling with the same class paths, because the compilation daemon can reuse a compiler instance.

       The  compilation  daemon  is  smart enough to flush its cached compiler when the class path changes.  However, if the contents of the class
       path change, for example due to upgrading a library, then the daemon should be explicitly shut down with -shutdown.

       Note that the scala script runner will also use the offline compiler by default, with the same advantages and caveats.

EXAMPLE

       The following session shows a typical speed up due to using the offline compiler.

       > fsc -verbose -d /tmp test.scala
       ...
       [Port number: 32834]
       [Starting new Scala compile server instance]
       [Classpath = ...]
       [loaded directory path ... in 692ms]
       ...
       [parsing test.scala]
       ...
       [total in 943ms]

       > fsc -verbose -d /tmp test.scala
       ...
       [Port number: 32834]
       [parsing test.scala]
       ...
       [total in 60ms]

       > fsc -verbose -d /tmp test.scala
       ...
       [Port number: 32834]
       [parsing test.scala]
       ...
       [total in 42ms]

       > fsc -verbose -shutdown
       [Scala compile server exited]

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"

EXIT STATUS

       fsc returns a zero exit 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 condi-
       tions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       sbaz(1), scala(1), scalac(1), scaladoc(1), scalap(1)

version 0.4							 January 18, 2007							    fsc(1)