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   A GNU Manual

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   You have freedom to copy and modify this GNU Manual, like GNU

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INFO-DIR-SECTION Software development

START-INFO-DIR-ENTRY

* Gcj: (gcj).               Ahead-of-time compiler for the Java language

END-INFO-DIR-ENTRY

INFO-DIR-SECTION Individual utilities

START-INFO-DIR-ENTRY

* jcf-dump: (gcj)Invoking jcf-dump.

                            Print information about Java class files

* gij: (gcj)Invoking gij.   GNU interpreter for Java bytecode

* gcj-dbtool: (gcj)Invoking gcj-dbtool.

                            Tool for manipulating class file databases.

* jv-convert: (gcj)Invoking jv-convert.

                            Convert file from one encoding to another

* grmic: (gcj)Invoking grmic.

                            Generate stubs for Remote Method Invocation.

* gc-analyze: (gcj)Invoking gc-analyze.

                            Analyze Garbage Collector (GC) memory dumps.

* aot-compile: (gcj)Invoking aot-compile.

                            Compile bytecode to native and generate databases.

* rebuild-gcj-db: (gcj)Invoking rebuild-gcj-db.

                            Merge the per-solib databases made by aot-compile

                            into one system-wide database.

END-INFO-DIR-ENTRY

   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 section entitled "GNU Free Documentation License".

   (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.

File: gcj.info,  Node: Top,  Next: Copying,  Up: (dir)

Introduction

************

This manual describes how to use `gcj', the GNU compiler for the Java

programming language.  `gcj' can generate both `.class' files and

object files, and it can read both Java source code and `.class' files.

* Menu:

* Copying::             The GNU General Public License

* GNU Free Documentation License::

                        How you can share and copy this manual

* Invoking gcj::        Compiler options supported by `gcj'

* Compatibility::       Compatibility between gcj and other tools for Java

* Invoking jcf-dump::   Print information about class files

* Invoking gij::        Interpreting Java bytecodes

* Invoking gcj-dbtool:: Tool for manipulating class file databases.

* Invoking jv-convert:: Converting from one encoding to another

* Invoking grmic::      Generate stubs for Remote Method Invocation.

* Invoking gc-analyze:: Analyze Garbage Collector (GC) memory dumps.

* Invoking aot-compile:: Compile bytecode to native and generate databases.

* Invoking rebuild-gcj-db:: Merge the per-solib databases made by aot-compile

                            into one system-wide database.

* About CNI::           Description of the Compiled Native Interface

* System properties::   Modifying runtime behavior of the libgcj library

* Resources::           Where to look for more information

* Index::               Index.

File: gcj.info,  Node: Copying,  Next: GNU Free Documentation License,  Prev: Top,  Up: Top

GNU General Public License

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     If conditions are imposed on you (whether by court order,

     agreement or otherwise) that contradict the conditions of this

     License, they do not excuse you from the conditions of this

     License.  If you cannot convey a covered work so as to satisfy

     simultaneously your obligations under this License and any other

     pertinent obligations, then as a consequence you may not convey it

     at all.  For example, if you agree to terms that obligate you to

     collect a royalty for further conveying from those to whom you

     convey the Program, the only way you could satisfy both those

     terms and this License would be to refrain entirely from conveying

     the Program.

 13. Use with the GNU Affero General Public License.

     Notwithstanding any other provision of this License, you have

     permission to link or combine any covered work with a work licensed

     under version 3 of the GNU Affero General Public License into a

     single combined work, and to convey the resulting work.  The terms

     of this License will continue to apply to the part which is the

     covered work, but the special requirements of the GNU Affero

     General Public License, section 13, concerning interaction through

     a network will apply to the combination as such.

 14. Revised Versions of this License.

     The Free Software Foundation may publish revised and/or new

     versions of the GNU General Public License from time to time.

     Such new versions will be similar in spirit to the present

     version, but may differ in detail to address new problems or

     concerns.

     Each version is given a distinguishing version number.  If the

     Program specifies that a certain numbered version of the GNU

     General Public License "or any later version" applies to it, you

     have the option of following the terms and conditions either of

     that numbered version or of any later version published by the

     Free Software Foundation.  If the Program does not specify a

     version number of the GNU General Public License, you may choose

     any version ever published by the Free Software Foundation.

     If the Program specifies that a proxy can decide which future

     versions of the GNU General Public License can be used, that

     proxy's public statement of acceptance of a version permanently

     authorizes you to choose that version for the Program.

     Later license versions may give you additional or different

     permissions.  However, no additional obligations are imposed on any

     author or copyright holder as a result of your choosing to follow a

     later version.

 15. Disclaimer of Warranty.

     THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY

     APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE

     COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"

     WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,

     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE

     RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.

     SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL

     NECESSARY SERVICING, REPAIR OR CORRECTION.

 16. Limitation of Liability.

     IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN

     WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES

     AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU

     FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR

     CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE

     THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA

     BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD

     PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER

     PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF

     THE POSSIBILITY OF SUCH DAMAGES.

 17. Interpretation of Sections 15 and 16.

     If the disclaimer of warranty and limitation of liability provided

     above cannot be given local legal effect according to their terms,

     reviewing courts shall apply local law that most closely

     approximates an absolute waiver of all civil liability in

     connection with the Program, unless a warranty or assumption of

     liability accompanies a copy of the Program in return for a fee.

END OF TERMS AND CONDITIONS

===========================

How to Apply These Terms to Your New Programs

=============================================

If you develop a new program, and you want it to be of the greatest

possible use to the public, the best way to achieve this is to make it

free software which everyone can redistribute and change under these

terms.

   To do so, attach the following notices to the program.  It is safest

to attach them to the start of each source file to most effectively

state the exclusion of warranty; and each file should have at least the

"copyright" line and a pointer to where the full notice is found.

     ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.

     Copyright (C) YEAR NAME OF AUTHOR

     This program is free software: you can redistribute it and/or modify

     it under the terms of the GNU General Public License as published by

     the Free Software Foundation, either version 3 of the License, or (at

     your option) any later version.

     This program is distributed in the hope that it will be useful, but

     WITHOUT ANY WARRANTY; without even the implied warranty of

     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

     General Public License for more details.

     You should have received a copy of the GNU General Public License

     along with this program.  If not, see `http://www.gnu.org/licenses/'.

   Also add information on how to contact you by electronic and paper

mail.

   If the program does terminal interaction, make it output a short

notice like this when it starts in an interactive mode:

     PROGRAM Copyright (C) YEAR NAME OF AUTHOR

     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.

     This is free software, and you are welcome to redistribute it

     under certain conditions; type `show c' for details.

   The hypothetical commands `show w' and `show c' should show the

appropriate parts of the General Public License.  Of course, your

program's commands might be different; for a GUI interface, you would

use an "about box".

   You should also get your employer (if you work as a programmer) or

school, if any, to sign a "copyright disclaimer" for the program, if

necessary.  For more information on this, and how to apply and follow

the GNU GPL, see `http://www.gnu.org/licenses/'.

   The GNU General Public License does not permit incorporating your

program into proprietary programs.  If your program is a subroutine

library, you may consider it more useful to permit linking proprietary

applications with the library.  If this is what you want to do, use the

GNU Lesser General Public License instead of this License.  But first,

please read `http://www.gnu.org/philosophy/why-not-lgpl.html'.

File: gcj.info,  Node: GNU Free Documentation License,  Next: Invoking gcj,  Prev: Copying,  Up: Top

GNU Free Documentation License

******************************

                      Version 1.2, November 2002

     Copyright (C) 2000,2001,2002 Free Software Foundation, Inc.

     51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

     Everyone is permitted to copy and distribute verbatim copies

     of this license document, but changing it is not allowed.

  0. PREAMBLE

     The purpose of this License is to make a manual, textbook, or other

     functional and useful document "free" in the sense of freedom: to

     assure everyone the effective freedom to copy and redistribute it,

     with or without modifying it, either commercially or

     noncommercially.  Secondarily, this License preserves for the

     author and publisher a way to get credit for their work, while not

     being considered responsible for modifications made by others.

     This License is a kind of "copyleft", which means that derivative

     works of the document must themselves be free in the same sense.

     It complements the GNU General Public License, which is a copyleft

     license designed for free software.

     We have designed this License in order to use it for manuals for

     free software, because free software needs free documentation: a

     free program should come with manuals providing the same freedoms

     that the software does.  But this License is not limited to

     software manuals; it can be used for any textual work, regardless

     of subject matter or whether it is published as a printed book.

     We recommend this License principally for works whose purpose is

     instruction or reference.

  1. APPLICABILITY AND DEFINITIONS

     This License applies to any manual or other work, in any medium,

     that contains a notice placed by the copyright holder saying it

     can be distributed under the terms of this License.  Such a notice

     grants a world-wide, royalty-free license, unlimited in duration,

     to use that work under the conditions stated herein.  The

     "Document", below, refers to any such manual or work.  Any member

     of the public is a licensee, and is addressed as "you".  You

     accept the license if you copy, modify or distribute the work in a

     way requiring permission under copyright law.

     A "Modified Version" of the Document means any work containing the

     Document or a portion of it, either copied verbatim, or with

     modifications and/or translated into another language.

     A "Secondary Section" is a named appendix or a front-matter section

     of the Document that deals exclusively with the relationship of the

     publishers or authors of the Document to the Document's overall

     subject (or to related matters) and contains nothing that could

     fall directly within that overall subject.  (Thus, if the Document

     is in part a textbook of mathematics, a Secondary Section may not

     explain any mathematics.)  The relationship could be a matter of

     historical connection with the subject or with related matters, or

     of legal, commercial, philosophical, ethical or political position

     regarding them.

     The "Invariant Sections" are certain Secondary Sections whose

     titles are designated, as being those of Invariant Sections, in

     the notice that says that the Document is released under this

     License.  If a section does not fit the above definition of

     Secondary then it is not allowed to be designated as Invariant.

     The Document may contain zero Invariant Sections.  If the Document

     does not identify any Invariant Sections then there are none.

     The "Cover Texts" are certain short passages of text that are

     listed, as Front-Cover Texts or Back-Cover Texts, in the notice

     that says that the Document is released under this License.  A

     Front-Cover Text may be at most 5 words, and a Back-Cover Text may

     be at most 25 words.

     A "Transparent" copy of the Document means a machine-readable copy,

     represented in a format whose specification is available to the

     general public, that is suitable for revising the document

     straightforwardly with generic text editors or (for images

     composed of pixels) generic paint programs or (for drawings) some

     widely available drawing editor, and that is suitable for input to

     text formatters or for automatic translation to a variety of

     formats suitable for input to text formatters.  A copy made in an

     otherwise Transparent file format whose markup, or absence of

     markup, has been arranged to thwart or discourage subsequent

     modification by readers is not Transparent.  An image format is

     not Transparent if used for any substantial amount of text.  A

     copy that is not "Transparent" is called "Opaque".

     Examples of suitable formats for Transparent copies include plain

     ASCII without markup, Texinfo input format, LaTeX input format,

     SGML or XML using a publicly available DTD, and

     standard-conforming simple HTML, PostScript or PDF designed for

     human modification.  Examples of transparent image formats include

     PNG, XCF and JPG.  Opaque formats include proprietary formats that

     can be read and edited only by proprietary word processors, SGML or

     XML for which the DTD and/or processing tools are not generally

     available, and the machine-generated HTML, PostScript or PDF

     produced by some word processors for output purposes only.

     The "Title Page" means, for a printed book, the title page itself,

     plus such following pages as are needed to hold, legibly, the

     material this License requires to appear in the title page.  For

     works in formats which do not have any title page as such, "Title

     Page" means the text near the most prominent appearance of the

     work's title, preceding the beginning of the body of the text.

     A section "Entitled XYZ" means a named subunit of the Document

     whose title either is precisely XYZ or contains XYZ in parentheses

     following text that translates XYZ in another language.  (Here XYZ

     stands for a specific section name mentioned below, such as

     "Acknowledgements", "Dedications", "Endorsements", or "History".)

     To "Preserve the Title" of such a section when you modify the