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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