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.\" ========================================================================

.\"

.IX Title "GCJ-DBTOOL 1"

.TH GCJ-DBTOOL 1 "2007-10-07" "gcc-4.2.2" "GNU"

.SH "NAME"

gcj\-dbtool \- Manipulate class file mapping databases for libgcj

.SH "SYNOPSIS"

.IX Header "SYNOPSIS"

gcj-dbtool \fB\s-1OPTION\s0\fR \fI\s-1DBFILE\s0\fR [\fB\s-1MORE\s0\fR] ...

.PP

gcj-dbtool [\fB\-0\fR] [\fB\-\fR] [\fB\-n\fR] [\fB\-a\fR] [\fB\-f\fR]

  [\fB\-t\fR] [\fB\-l\fR] [\fB\-p\fR [\fI\s-1LIBDIR\s0\fR]]

  [\fB\-v\fR] [\fB\-m\fR] [\fB\-\-version\fR] [\fB\-\-help\fR]

.SH "DESCRIPTION"

.IX Header "DESCRIPTION"

\&\f(CW\*(C`gcj\-dbtool\*(C'\fR is a tool for creating and manipulating class file

mapping databases.  \f(CW\*(C`libgcj\*(C'\fR 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 \f(CW\*(C`gcj\*(C'\fR.

.PP

\&\f(CW\*(C`gcj\-dbtool\*(C'\fR works best if all the jar files added to it are

compiled using \f(CW\*(C`\-findirect\-dispatch\*(C'\fR.

.PP

Note that \f(CW\*(C`gcj\-dbtool\*(C'\fR is currently available as \*(L"preview

technology\*(R".  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.

.SH "OPTIONS"

.IX Header "OPTIONS"

.IP "\fB\-n\fR \fI\s-1DBFILE\s0\fR \fB[\fR\fI\s-1SIZE\s0\fR\fB]\fR" 4

.IX Item "-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.

.IP "\fB\-a\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1JARFILE\s0\fR\fB \fR\fI\s-1LIB\s0\fR" 4

.IX Item "-a DBFILE JARFILE LIB"

.PD 0

.IP "\fB\-f\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1JARFILE\s0\fR\fB \fR\fI\s-1LIB\s0\fR" 4

.IX Item "-f DBFILE JARFILE LIB"

.PD

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 \fB\-a\fR option will verify

that \fI\s-1LIB\s0\fR exists before adding it to the database; \fB\-f\fR

skips this check.

.IP "\fB[\fR\fB\-\fR\fB][\fR\fB\-0\fR\fB] \-m\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1DBFILE\s0\fR\fB,[\fR\fI\s-1DBFILE\s0\fR\fB]\fR" 4

.IX Item "[-][-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.

.Sp

If \fB\-\fR or \fB\-0\fR are used, the list of files to read is

taken from standard input instead of the command line.  For

\&\fB\-0\fR, Input filenames are terminated by a null character

instead of by whitespace.  Useful when arguments might contain white

space.  The \s-1GNU\s0 find \-print0 option produces input suitable for this

mode.

.IP "\fB\-t\fR \fI\s-1DBFILE\s0\fR" 4

.IX Item "-t DBFILE"

Test a database.

.IP "\fB\-l\fR \fI\s-1DBFILE\s0\fR" 4

.IX Item "-l DBFILE"

List the contents of a database.

.IP "\fB\-p\fR" 4

.IX Item "-p"

Print the name of the default database.  If there is no default

database, this prints a blank line.  If \fI\s-1LIBDIR\s0\fR is specified, use

it instead of the default library directory component of the database

name.

.IP "\fB\-\-help\fR" 4

.IX Item "--help"

Print a help message, then exit.

.IP "\fB\-\-version\fR" 4

.IX Item "--version"

.PD 0

.IP "\fB\-v\fR" 4

.IX Item "-v"

.PD

Print version information, then exit.

.SH "SEE ALSO"

.IX Header "SEE ALSO"

.SH "COPYRIGHT"

.IX Header "COPYRIGHT"

Copyright (c) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.

.PP

Permission is granted to copy, distribute and/or modify this document

under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.2 or

any later version published by the Free Software Foundation; with the

Invariant Sections being \*(L"\s-1GNU\s0 General Public License\*(R", 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 \fIgfdl\fR\|(7).

.PP

(a) The \s-1FSF\s0's Front-Cover Text is:

.PP

.Vb 1

\&     A GNU Manual

.Ve

.PP

(b) The \s-1FSF\s0's Back-Cover Text is:

.PP

.Vb 3

\&     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.

.Ve