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124 .\" ========================================================================
126 .IX Title "GCJ-DBTOOL 1"
127 .TH GCJ-DBTOOL 1 "2013-05-31" "gcc-4.8.1" "GNU"
128 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
129 .\" way too many mistakes in technical documents.
133 gcj\-dbtool \- Manipulate class file mapping databases for libgcj
135 .IX Header "SYNOPSIS"
136 gcj-dbtool \fB\s-1OPTION\s0\fR \fI\s-1DBFILE\s0\fR [\fB\s-1MORE\s0\fR] ...
138 gcj-dbtool [\fB\-0\fR] [\fB\-\fR] [\fB\-n\fR] [\fB\-a\fR] [\fB\-f\fR]
139 [\fB\-t\fR] [\fB\-l\fR] [\fB\-p\fR [\fI\s-1LIBDIR\s0\fR]]
140 [\fB\-v\fR] [\fB\-m\fR] [\fB\-\-version\fR] [\fB\-\-help\fR]
142 .IX Header "DESCRIPTION"
143 \&\f(CW\*(C`gcj\-dbtool\*(C'\fR is a tool for creating and manipulating class file
144 mapping databases. \f(CW\*(C`libgcj\*(C'\fR can use these databases to find a
145 shared library corresponding to the bytecode representation of a
146 class. This functionality is useful for ahead-of-time compilation of
147 a program that has no knowledge of \f(CW\*(C`gcj\*(C'\fR.
149 \&\f(CW\*(C`gcj\-dbtool\*(C'\fR works best if all the jar files added to it are
150 compiled using \f(CW\*(C`\-findirect\-dispatch\*(C'\fR.
152 Note that \f(CW\*(C`gcj\-dbtool\*(C'\fR is currently available as \*(L"preview
153 technology\*(R". We believe it is a reasonable way to allow
154 application-transparent ahead-of-time compilation, but this is an
155 unexplored area. We welcome your comments.
158 .IP "\fB\-n\fR \fI\s-1DBFILE\s0\fR \fB[\fR\fI\s-1SIZE\s0\fR\fB]\fR" 4
159 .IX Item "-n DBFILE [SIZE]"
160 This creates a new database. Currently, databases cannot be resized;
161 you can choose a larger initial size if desired. The default size is
163 .IP "\fB\-a\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1JARFILE\s0\fR\fB \fR\fI\s-1LIB\s0\fR" 4
164 .IX Item "-a DBFILE JARFILE LIB"
166 .IP "\fB\-f\fR \fI\s-1DBFILE\s0\fR\fB \fR\fI\s-1JARFILE\s0\fR\fB \fR\fI\s-1LIB\s0\fR" 4
167 .IX Item "-f DBFILE JARFILE LIB"
169 This adds a jar file to the database. For each class file in the jar,
170 a cryptographic signature of the bytecode representation of the class
171 is recorded in the database. At runtime, a class is looked up by its
172 signature and the compiled form of the class is looked for in the
173 corresponding shared library. The \fB\-a\fR option will verify
174 that \fI\s-1LIB\s0\fR exists before adding it to the database; \fB\-f\fR
176 .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
177 .IX Item "[-][-0] -m DBFILE DBFILE,[DBFILE]"
178 Merge a number of databases. The output database overwrites any
179 existing database. To add databases into an existing database,
180 include the destination in the list of sources.
182 If \fB\-\fR or \fB\-0\fR are used, the list of files to read is
183 taken from standard input instead of the command line. For
184 \&\fB\-0\fR, Input filenames are terminated by a null character
185 instead of by whitespace. Useful when arguments might contain white
186 space. The \s-1GNU\s0 find \-print0 option produces input suitable for this
188 .IP "\fB\-t\fR \fI\s-1DBFILE\s0\fR" 4
191 .IP "\fB\-l\fR \fI\s-1DBFILE\s0\fR" 4
193 List the contents of a database.
196 Print the name of the default database. If there is no default
197 database, this prints a blank line. If \fI\s-1LIBDIR\s0\fR is specified, use
198 it instead of the default library directory component of the database
200 .IP "\fB\-\-help\fR" 4
202 Print a help message, then exit.
203 .IP "\fB\-\-version\fR" 4
209 Print version information, then exit.
211 .IX Header "SEE ALSO"
212 \&\fIgcc\fR\|(1), \fIgcj\fR\|(1), \fIgcjh\fR\|(1), \fIjcf\-dump\fR\|(1), \fIgfdl\fR\|(7),
213 and the Info entries for \fIgcj\fR and \fIgcc\fR.
215 .IX Header "COPYRIGHT"
216 Copyright (c) 2001\-2013 Free Software Foundation, Inc.
218 Permission is granted to copy, distribute and/or modify this document
219 under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.3 or
220 any later version published by the Free Software Foundation; with no
221 Invariant Sections, the Front-Cover Texts being (a) (see below), and
222 with the Back-Cover Texts being (b) (see below).
223 A copy of the license is included in the
224 man page \fIgfdl\fR\|(7).
226 (a) The \s-1FSF\s0's Front-Cover Text is:
232 (b) The \s-1FSF\s0's Back-Cover Text is:
235 \& You have freedom to copy and modify this GNU Manual, like GNU
236 \& software. Copies published by the Free Software Foundation raise
237 \& funds for GNU development.