gcj-dbtool(1) [suse man page]
GCJ-DBTOOL(1) GNU GCJ-DBTOOL(1) NAME
gcj-dbtool - Manipulate class file mapping databases for libgcj SYNOPSIS
gcj-dbtool OPTION DBFILE [MORE] ... gcj-dbtool [-0] [-] [-n] [-a] [-f] [-t] [-l] [-p [LIBDIR]] [-v] [-m] [--version] [--help] DESCRIPTION
"gcj-dbtool" is a tool for creating and manipulating class file mapping databases. "libgcj" can use these databases to find a shared library corresponding to the bytecode representation of a class. This functionality is useful for ahead-of-time compilation of a program that has no knowledge of "gcj". "gcj-dbtool" works best if all the jar files added to it are compiled using "-findirect-dispatch". Note that "gcj-dbtool" is currently available as "preview technology". We believe it is a reasonable way to allow application-transparent ahead-of-time compilation, but this is an unexplored area. We welcome your comments. OPTIONS
-n DBFILE [SIZE] This creates a new database. Currently, databases cannot be resized; you can choose a larger initial size if desired. The default size is 32,749. -a DBFILE JARFILE LIB -f DBFILE JARFILE LIB This adds a jar file to the database. For each class file in the jar, a cryptographic signature of the bytecode representation of the class is recorded in the database. At runtime, a class is looked up by its signature and the compiled form of the class is looked for in the corresponding shared library. The -a option will verify that LIB exists before adding it to the database; -f skips this check. [-][-0] -m DBFILE DBFILE,[DBFILE] Merge a number of databases. The output database overwrites any existing database. To add databases into an existing database, include the destination in the list of sources. If - or -0 are used, the list of files to read is taken from standard input instead of the command line. For -0, Input filenames are terminated by a null character instead of by whitespace. Useful when arguments might contain white space. The GNU find -print0 option produces input suitable for this mode. -t DBFILE Test a database. -l DBFILE List the contents of a database. -p Print the name of the default database. If there is no default database, this prints a blank line. If LIBDIR is specified, use it instead of the default library directory component of the database name. --help Print a help message, then exit. --version -v Print version information, then exit. SEE ALSO
gcc(1), gcj(1), gcjh(1), jcf-dump(1), gfdl(7), and the Info entries for gcj and gcc. COPYRIGHT
Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, the Front-Cover Texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the man page gfdl(7). (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development. gcc-4.5 2010-07-05 GCJ-DBTOOL(1)
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GIJ(1) GNU GIJ(1) NAME
gij - GNU interpreter for Java bytecode SYNOPSIS
gij [OPTION] ... JARFILE [ARGS...] gij [-jar] [OPTION] ... CLASS [ARGS...] [-cp path] [-classpath path] [-Dname[=value]...] [-ms=number] [-mx=number] [-Xargument] [-verbose] [-verbose:class] [--showversion] [--version] [--help][-?] DESCRIPTION
"gij" is a Java bytecode interpreter included with "libgcj". "gij" is not available on every platform; porting it requires a small amount of assembly programming which has not been done for all the targets supported by gcj. The primary argument to "gij" is the name of a class or, with "-jar", a jar file. Options before this argument are interpreted by "gij"; remaining options are passed to the interpreted program. If a class name is specified and this class does not have a "main" method with the appropriate signature (a "static void" method with a "String[]" as its sole argument), then "gij" will print an error and exit. If a jar file is specified then "gij" will use information in it to determine which class' "main" method will be invoked. "gij" will invoke the "main" method with all the remaining command-line options. Note that "gij" is not limited to interpreting code. Because "libgcj" includes a class loader which can dynamically load shared objects, it is possible to give "gij" the name of a class which has been compiled and put into a shared library on the class path. OPTIONS
-cp path -classpath path Set the initial class path. The class path is used for finding class and resource files. If specified, this option overrides the "CLASSPATH" environment variable. Note that this option is ignored if "-jar" is used. -Dname[=value] This defines a system property named name with value value. If value is not specified then it defaults to the empty string. These system properties are initialized at the program's startup and can be retrieved at runtime using the "java.lang.System.getProperty" method. -ms=number Equivalent to "-Xms". -mx=number Equivalent to "-Xmx". -noverify Do not verify compliance of bytecode with the VM specification. In addition, this option disables type verification which is otherwise performed on BC-ABI compiled code. -X -Xargument Supplying "-X" by itself will cause "gij" to list all the supported "-X" options. Currently these options are supported: -Xmssize Set the initial heap size. -Xmxsize Set the maximum heap size. -Xsssize Set the thread stack size. Unrecognized "-X" options are ignored, for compatibility with other runtimes. -jar This indicates that the name passed to "gij" should be interpreted as the name of a jar file, not a class. --help -? Print help, then exit. --showversion Print version number and continue. --fullversion Print detailed version information, then exit. --version Print version number, then exit. -verbose -verbose:class Each time a class is initialized, print a short message on standard error. "gij" also recognizes and ignores the following options, for compatibility with existing application launch scripts: "-client", "-server", "-hotspot", "-jrockit", "-agentlib", "-agentpath", "-debug", "-d32", "-d64", "-javaagent", "-noclassgc", "-verify", and "-verifyremote". SEE ALSO
gcc(1), gcj(1), gcjh(1), jcf-dump(1), gfdl(7), and the Info entries for gcj and gcc. COPYRIGHT
Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, the Front-Cover Texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the man page gfdl(7). (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development. gcc-4.5 2010-07-05 GIJ(1)