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//usr/share/doc/gdbm/README

GNU dbm README
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* Introduction

This file contains brief information about configuring, testing
and using GNU dbm.  It is *not* intended as a replacement
for the documentation, instead it is provided as a brief reference
only. The complete documentation is available in doc/ subdirectory.
To read the manpage without installing the package use `man
doc/gdbm.3'.  To read texinfo documentation without installing the
package, run `info -f doc/gdbm.info'.  After the package is installed
the documentation can be accessed by running `man gdbm' and
`info gdbm'.

* Overview

GNU dbm is a set of database routines that use extendable hashing and
works similar to the standard UNIX dbm routines.  The library provides
also an optional compatibility layer for UNIX-like dbm and ndbm calls.

* Configuration

a)  configure [PARAMETERS]
   b)  make

For a list of generic PARAMETERS, see the file INCLUDE.  The gdbm-specific
parameters are:

** --enable-memory-mapped-io

Enable the use of mmap(2) for I/O optimizations.  This is the default,
if mmap is available.  To disable mmap, use --disable-memory-mapped-io.

** --enable-libgdbm-compat

Build and install libgdbm_compat, a compatibility layer which provides
UNIX-like dbm and ndbm interfaces.  It includes two header files:
dbm.h and ndbm.h, which are installed into $includedir.  If you wish
to install them elsewhere, define the variable COMPATINCLUDEDIR, e.g.

./configure --enable-libgdbm-compat COMPATINCLUDEDIR=/usr/include/gdbm

** --without-readline

Don't compile GNU Readline support.  By default, configure enables
line-editing support if GNU Readline is available on the system.

** --enable-gdbmtool-debug

This option instruments gdbmtool for additional debugging. Configured
with this option, gdbmtool accepts two additional arguments:
--lex-trace, which enables tracing the operation of the lexical
analyzer, and --gram-trace, which enables parser tracing output.

Note, that bison and flex must be installed for this option to take effect,

* Installation

make install

This package also contains the 'magic' file for the file(1) utility -
src/gdbm.magic.  It is not installed by default, as its installation
location differs considerably between various distributions.  The most
straightforward (but not the best one) approach is appending its
content to /etc/magic:

cat src/gdbm.magic >> /etc/magic

See the documentation in your distribution for detailed instructions
on how to install this file.
  
* Bug reporting

Please report bugs via email to <bug-gdbm@gnu.org>.  You can also use
bug-tracker at <https://puszcza.gnu.org.ua/bugs/?group=gdbm>.

* Documentation, updates etc.

For the latest updates, visit <http://www.gnu.org/software/gdbm>,

In particular, a copy of GDBM documentation in various formats is
available online at <https://www.gnu.org/software/gdbm/manual>.

Latest versions of GDBM can be downloaded from
<https://ftp.gnu.org/gnu/gdbm>.  You can also use anonymous fpt at
the same location, if you prefer.

To track the development, visit
<http://puszcza.gnu.org.ua/projects/gdbm>.

* Copyright information:

Permission is granted to anyone to make or distribute verbatim copies
   of this document as received, in any medium, provided that the
   copyright notice and this permission notice are preserved,
   thus giving the recipient permission to redistribute in turn.

Permission is granted to distribute modified versions
   of this document, or of portions of it,
   under the above conditions, provided also that they
   carry prominent notices stating who last changed them.

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