# $OpenLDAP$
# Copyright 1999-2022 The OpenLDAP Foundation, All Rights Reserved.
# COPYING RESTRICTIONS APPLY, see COPYRIGHT.

H1: Building and Installing OpenLDAP Software

This chapter details how to build and install the {{PRD:OpenLDAP}}
Software package including {{slapd}}(8), the Standalone {{TERM:LDAP}}
Daemon.  Building and installing OpenLDAP Software requires several
steps: installing prerequisite software, configuring OpenLDAP
Software itself, making, and finally installing.  The following
sections describe this process in detail.


H2: Obtaining and Extracting the Software

You can obtain OpenLDAP Software from the project's download
page at {{URL: http://www.openldap.org/software/download/}} or
directly from the project's {{TERM:FTP}} service at
{{URL: ftp://ftp.openldap.org/pub/OpenLDAP/}}.

The project makes available two series of packages for {{general
use}}.  The project makes {{releases}} as new features and bug fixes
come available.  Though the project takes steps to improve stability
of these releases, it is common for problems to arise only after
{{release}}.  The {{stable}} release is the latest {{release}} which
has demonstrated stability through general use.

Users of OpenLDAP Software can choose, depending on their desire
for the {{latest features}} versus {{demonstrated stability}}, the
most appropriate series to install.

After downloading OpenLDAP Software, you need to extract the
distribution from the compressed archive file and change your working
directory to the top directory of the distribution:

.{{EX:gunzip -c openldap-VERSION.tgz | tar xf -}}
.{{EX:cd openldap-VERSION}}

You'll have to replace {{EX:VERSION}} with the version name of
the release.

You should now review the {{F:COPYRIGHT}}, {{F:LICENSE}}, {{F:README}}
and {{F:INSTALL}} documents provided with the distribution.  The
{{F:COPYRIGHT}} and {{F:LICENSE}} provide information on acceptable
use, copying, and limitation of warranty of OpenLDAP Software. The
{{F:README}} and {{F:INSTALL}} documents provide detailed information
on prerequisite software and installation procedures.


H2: Prerequisite software

OpenLDAP Software relies upon a number of software packages distributed
by third parties.  Depending on the features you intend to use, you
may have to download and install a number of additional software
packages.  This section details commonly needed third party software
packages you might have to install.  However, for an up-to-date
prerequisite information, the {{F:README}} document should be
consulted.  Note that some of these third party packages may depend
on additional software packages.  Install each package per the
installation instructions provided with it.


H3: {{TERM[expand]TLS}}

OpenLDAP clients and servers require installation of {{PRD:OpenSSL}}
 or {{PRD:GnuTLS}}
{{TERM:TLS}} libraries to provide {{TERM[expand]TLS}} services.  Though
some operating systems may provide these libraries as part of the
base system or as an optional software component, OpenSSL and GnuTLS
often require separate installation.

OpenSSL is available from {{URL: http://www.openssl.org/}}.
GnuTLS is available from {{URL: http://www.gnu.org/software/gnutls/}}.

OpenLDAP Software will not be fully LDAPv3 compliant unless OpenLDAP's
{{EX:configure}} detects a usable TLS library.


H3: {{TERM[expand]SASL}}

OpenLDAP clients and servers require installation of {{PRD:Cyrus SASL}} 
libraries to provide {{TERM[expand]SASL}} services.  Though
some operating systems may provide this library as part of the
base system or as an optional software component, Cyrus SASL
often requires separate installation.

Cyrus SASL is available from
{{URL:http://asg.web.cmu.edu/sasl/sasl-library.html}}.
Cyrus SASL will make use of OpenSSL and Kerberos/GSSAPI libraries
if preinstalled.

OpenLDAP Software will not be fully LDAPv3 compliant unless OpenLDAP's
configure detects a usable Cyrus SASL installation.


H3: {{TERM[expand]Kerberos}}

OpenLDAP clients and servers support {{TERM:Kerberos}} authentication
services.  In particular, OpenLDAP supports the Kerberos V
{{TERM:GSS-API}} {{TERM:SASL}} authentication mechanism known as
the {{TERM:GSSAPI}} mechanism.  This feature requires, in addition to
Cyrus SASL libraries, either {{PRD:Heimdal}} or {{PRD:MIT Kerberos}}
V libraries.

Heimdal Kerberos is available from {{URL:https://github.com/heimdal/heimdal/}}.
MIT Kerberos is available from {{URL:http://web.mit.edu/kerberos/www/}}.

Use of strong authentication services, such as those provided by
Kerberos, is highly recommended.



H3: Database Software

OpenLDAP's {{slapd}}(8) {{TERM:MDB}} primary database backend uses the {{TERM:LMDB}}
software included with the OpenLDAP source.  There is no need to download any
additional software to have {{MDB}} support.



H3: Threads

OpenLDAP is designed to take advantage of threads.  OpenLDAP
supports POSIX {{pthreads}}, NT threads and a number of
other varieties.  {{EX:configure}} will complain if it cannot
find a suitable thread subsystem.   If this occurs, please
consult the {{F:Software|Installation|Platform Hints}} section
of the OpenLDAP FAQ {{URL: http://www.openldap.org/faq/}}.


H3: TCP Wrappers

{{slapd}}(8) supports TCP Wrappers (IP level access control filters)
if preinstalled.  Use of TCP Wrappers or other IP-level access
filters (such as those provided by an IP-level firewall) is recommended
for servers containing non-public information.


H2: Running configure

Now you should probably run the {{EX:configure}} script with the
{{EX:--help}} option.
This will give you a list of options that you can change when building
OpenLDAP.  Many of the features of OpenLDAP can be enabled or disabled
using this method.
!if 0
Please see the appendix for a more detailed list of configure options,
and their usage.
!endif
>	./configure --help

The {{EX:configure}} script also looks for certain variables
on the command line and in the environment.  These include:

!block table; align=Center; coltags="EX,N"; title="Table 4.1: Variables"
Variable	Description
CC      	Specify alternative C Compiler
CFLAGS  	Specify additional compiler flags
CPPFLAGS	Specify C Preprocessor flags
LDFLAGS 	Specify linker flags
LIBS    	Specify additional libraries
!endblock

Now run the configure script with any desired configuration options or
variables.

>	./configure [options] [variable=value ...]

As an example, let's assume that we want to install OpenLDAP with
MDB backend and TCP Wrappers support.  By default, MDB
is enabled and TCP Wrappers is not.  So, we just need to specify
{{EX:--enable-wrappers}} to include TCP Wrappers support:

>	./configure --enable-wrappers

However, this will fail to locate dependent software not
installed in system directories.  For example, if TCP Wrappers
headers and libraries are installed in {{F:/usr/local/include}}
and {{F:/usr/local/lib}} respectively, the {{EX:configure}}
script should typically be called as follows:

>	./configure --enable-wrappers \
>		CPPFLAGS="-I/usr/local/include" \
>		LDFLAGS="-L/usr/local/lib -Wl,-rpath,/usr/local/lib"

The {{EX:configure}} script will normally auto-detect appropriate
settings.  If you have problems at this stage, consult any platform
specific hints and check your {{EX:configure}} options, if any.


H2: Building the Software

Once you have run the {{EX:configure}} script the last line of output
should be:
>	Please "make depend" to build dependencies

If the last line of output does not match, {{EX:configure}} has failed,
and you will need to review its output to determine what went wrong.
You should not proceed until {{EX:configure}} completes successfully.

To build dependencies, run:
>	make depend

Now build the software, this step will actually compile OpenLDAP.
>	make

You should examine the output of this command carefully to make sure
everything is built correctly.  Note that this command builds the LDAP
libraries and associated clients as well as {{slapd}}(8).


H2: Testing the Software

Once the software has been properly configured and successfully
made, you should run the test suite to verify the build.

>	make test

Tests which apply to your configuration will run and they should pass.
Some tests, such as the replication test, may be skipped if not supported
by your configuration.


H2: Installing the Software

Once you have successfully tested the software, you are ready to
install it.  You will need to have write permission to the installation
directories you specified when you ran configure.  By default
OpenLDAP Software is installed in {{F:/usr/local}}.  If you changed
this setting with the {{EX:--prefix}} configure option, it will be
installed in the location you provided.

Typically, the installation requires {{super-user}} privileges.
From the top level OpenLDAP source directory, type:

>	su root -c 'make install'

and enter the appropriate password when requested.

You should examine the output of this command carefully to make sure
everything is installed correctly. You will find the configuration files
for {{slapd}}(8) in {{F:/usr/local/etc/openldap}} by default.  See the
chapter {{SECT:Configuring slapd}} for additional information.

