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diff --git a/doc/src/sgml/html/install-procedure.html b/doc/src/sgml/html/install-procedure.html new file mode 100644 index 0000000..2726524 --- /dev/null +++ b/doc/src/sgml/html/install-procedure.html @@ -0,0 +1,817 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>16.4. Installation Procedure</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="install-getsource.html" title="16.3. Getting the Source" /><link rel="next" href="install-post.html" title="16.5. Post-Installation Setup" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">16.4. Installation Procedure</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="install-getsource.html" title="16.3. Getting the Source">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="installation.html" title="Chapter 16. Installation from Source Code">Up</a></td><th width="60%" align="center">Chapter 16. Installation from Source Code</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="install-post.html" title="16.5. Post-Installation Setup">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="INSTALL-PROCEDURE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">16.4. Installation Procedure</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="install-procedure.html#CONFIGURE-OPTIONS">16.4.1. <code class="filename">configure</code> Options</a></span></dt><dt><span class="sect2"><a href="install-procedure.html#CONFIGURE-ENVVARS">16.4.2. <code class="filename">configure</code> Environment Variables</a></span></dt></dl></div><div class="procedure"><ol class="procedure" type="1"><li class="step" id="CONFIGURE"><p class="title"><strong>Configuration</strong></p><a id="id-1.6.3.8.2.1.2" class="indexterm"></a><p> + The first step of the installation procedure is to configure the + source tree for your system and choose the options you would like. + This is done by running the <code class="filename">configure</code> script. For a + default installation simply enter: +</p><pre class="screen"> +<strong class="userinput"><code>./configure</code></strong> +</pre><p> + This script will run a number of tests to determine values for various + system dependent variables and detect any quirks of your + operating system, and finally will create several files in the + build tree to record what it found. + </p><p> + You can also run <code class="filename">configure</code> in a directory outside + the source tree, and then build there, if you want to keep the build + directory separate from the original source files. This procedure is + called a + <a id="id-1.6.3.8.2.1.4.2" class="indexterm"></a><em class="firstterm">VPATH</em> + build. Here's how: +</p><pre class="screen"> +<strong class="userinput"><code>mkdir build_dir</code></strong> +<strong class="userinput"><code>cd build_dir</code></strong> +<strong class="userinput"><code>/path/to/source/tree/configure [options go here]</code></strong> +<strong class="userinput"><code>make</code></strong> +</pre><p> + </p><p> + The default configuration will build the server and utilities, as + well as all client applications and interfaces that require only a + C compiler. All files will be installed under + <code class="filename">/usr/local/pgsql</code> by default. + </p><p> + You can customize the build and installation process by supplying one + or more command line options to <code class="filename">configure</code>. + Typically you would customize the install location, or the set of + optional features that are built. <code class="filename">configure</code> + has a large number of options, which are described in + <a class="xref" href="install-procedure.html#CONFIGURE-OPTIONS" title="16.4.1. configure Options">Section 16.4.1</a>. + </p><p> + Also, <code class="filename">configure</code> responds to certain environment + variables, as described in <a class="xref" href="install-procedure.html#CONFIGURE-ENVVARS" title="16.4.2. configure Environment Variables">Section 16.4.2</a>. + These provide additional ways to customize the configuration. + </p></li><li class="step" id="BUILD"><p class="title"><strong>Build</strong></p><p> + To start the build, type either of: +</p><pre class="screen"> +<strong class="userinput"><code>make</code></strong> +<strong class="userinput"><code>make all</code></strong> +</pre><p> + (Remember to use <acronym class="acronym">GNU</acronym> <span class="application">make</span>.) + The build will take a few minutes depending on your + hardware. + </p><p> + If you want to build everything that can be built, including the + documentation (HTML and man pages), and the additional modules + (<code class="filename">contrib</code>), type instead: +</p><pre class="screen"> +<strong class="userinput"><code>make world</code></strong> +</pre><p> + </p><p> + If you want to build everything that can be built, including the + additional modules (<code class="filename">contrib</code>), but without + the documentation, type instead: +</p><pre class="screen"> +<strong class="userinput"><code>make world-bin</code></strong> +</pre><p> + </p><p> + If you want to invoke the build from another makefile rather than + manually, you must unset <code class="varname">MAKELEVEL</code> or set it to zero, + for instance like this: +</p><pre class="programlisting"> +build-postgresql: + $(MAKE) -C postgresql MAKELEVEL=0 all +</pre><p> + Failure to do that can lead to strange error messages, typically about + missing header files. + </p></li><li class="step"><p class="title"><strong>Regression Tests</strong></p><a id="id-1.6.3.8.2.3.2" class="indexterm"></a><p> + If you want to test the newly built server before you install it, + you can run the regression tests at this point. The regression + tests are a test suite to verify that <span class="productname">PostgreSQL</span> + runs on your machine in the way the developers expected it + to. Type: +</p><pre class="screen"> +<strong class="userinput"><code>make check</code></strong> +</pre><p> + (This won't work as root; do it as an unprivileged user.) + See <a class="xref" href="regress.html" title="Chapter 32. Regression Tests">Chapter 32</a> for + detailed information about interpreting the test results. You can + repeat this test at any later time by issuing the same command. + </p></li><li class="step" id="INSTALL"><p class="title"><strong>Installing the Files</strong></p><div class="note"><h3 class="title">Note</h3><p> + If you are upgrading an existing system be sure to read + <a class="xref" href="upgrading.html" title="18.6. Upgrading a PostgreSQL Cluster">Section 18.6</a>, + which has instructions about upgrading a + cluster. + </p></div><p> + To install <span class="productname">PostgreSQL</span> enter: +</p><pre class="screen"> +<strong class="userinput"><code>make install</code></strong> +</pre><p> + This will install files into the directories that were specified + in <a class="xref" href="install-procedure.html#CONFIGURE" title="Configuration">Step 1</a>. Make sure that you have appropriate + permissions to write into that area. Normally you need to do this + step as root. Alternatively, you can create the target + directories in advance and arrange for appropriate permissions to + be granted. + </p><p> + To install the documentation (HTML and man pages), enter: +</p><pre class="screen"> +<strong class="userinput"><code>make install-docs</code></strong> +</pre><p> + </p><p> + If you built the world above, type instead: +</p><pre class="screen"> +<strong class="userinput"><code>make install-world</code></strong> +</pre><p> + This also installs the documentation. + </p><p> + If you built the world without the documentation above, type instead: +</p><pre class="screen"> +<strong class="userinput"><code>make install-world-bin</code></strong> +</pre><p> + </p><p> + You can use <code class="literal">make install-strip</code> instead of + <code class="literal">make install</code> to strip the executable files and + libraries as they are installed. This will save some space. If + you built with debugging support, stripping will effectively + remove the debugging support, so it should only be done if + debugging is no longer needed. <code class="literal">install-strip</code> + tries to do a reasonable job saving space, but it does not have + perfect knowledge of how to strip every unneeded byte from an + executable file, so if you want to save all the disk space you + possibly can, you will have to do manual work. + </p><p> + The standard installation provides all the header files needed for client + application development as well as for server-side program + development, such as custom functions or data types written in C. + (Prior to <span class="productname">PostgreSQL</span> 8.0, a separate <code class="literal">make + install-all-headers</code> command was needed for the latter, but this + step has been folded into the standard install.) + </p><p><strong>Client-only installation: </strong> + If you want to install only the client applications and + interface libraries, then you can use these commands: +</p><pre class="screen"> +<strong class="userinput"><code>make -C src/bin install</code></strong> +<strong class="userinput"><code>make -C src/include install</code></strong> +<strong class="userinput"><code>make -C src/interfaces install</code></strong> +<strong class="userinput"><code>make -C doc install</code></strong> +</pre><p> + <code class="filename">src/bin</code> has a few binaries for server-only use, + but they are small. + </p></li></ol></div><p><strong>Uninstallation: </strong> + To undo the installation use the command <code class="command">make + uninstall</code>. However, this will not remove any created directories. + </p><p><strong>Cleaning: </strong> + After the installation you can free disk space by removing the built + files from the source tree with the command <code class="command">make + clean</code>. This will preserve the files made by the <code class="command">configure</code> + program, so that you can rebuild everything with <code class="command">make</code> + later on. To reset the source tree to the state in which it was + distributed, use <code class="command">make distclean</code>. If you are going to + build for several platforms within the same source tree you must do + this and re-configure for each platform. (Alternatively, use + a separate build tree for each platform, so that the source tree + remains unmodified.) + </p><p> + If you perform a build and then discover that your <code class="command">configure</code> + options were wrong, or if you change anything that <code class="command">configure</code> + investigates (for example, software upgrades), then it's a good + idea to do <code class="command">make distclean</code> before reconfiguring and + rebuilding. Without this, your changes in configuration choices + might not propagate everywhere they need to. + </p><div class="sect2" id="CONFIGURE-OPTIONS"><div class="titlepage"><div><div><h3 class="title">16.4.1. <code class="filename">configure</code> Options</h3></div></div></div><a id="id-1.6.3.8.6.2" class="indexterm"></a><p> + <code class="command">configure</code>'s command line options are explained below. + This list is not exhaustive (use <code class="literal">./configure --help</code> + to get one that is). The options not covered here are meant for + advanced use-cases such as cross-compilation, and are documented in + the standard Autoconf documentation. + </p><div class="sect3" id="CONFIGURE-OPTIONS-LOCATIONS"><div class="titlepage"><div><div><h4 class="title">16.4.1.1. Installation Locations</h4></div></div></div><p> + These options control where <code class="literal">make install</code> will put + the files. The <code class="option">--prefix</code> option is sufficient for + most cases. If you have special needs, you can customize the + installation subdirectories with the other options described in this + section. Beware however that changing the relative locations of the + different subdirectories may render the installation non-relocatable, + meaning you won't be able to move it after installation. + (The <code class="literal">man</code> and <code class="literal">doc</code> locations are + not affected by this restriction.) For relocatable installs, you + might want to use the <code class="literal">--disable-rpath</code> option + described later. + </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">--prefix=<em class="replaceable"><code>PREFIX</code></em></code></span></dt><dd><p> + Install all files under the directory <em class="replaceable"><code>PREFIX</code></em> + instead of <code class="filename">/usr/local/pgsql</code>. The actual + files will be installed into various subdirectories; no files + will ever be installed directly into the + <em class="replaceable"><code>PREFIX</code></em> directory. + </p></dd><dt><span class="term"><code class="option">--exec-prefix=<em class="replaceable"><code>EXEC-PREFIX</code></em></code></span></dt><dd><p> + You can install architecture-dependent files under a + different prefix, <em class="replaceable"><code>EXEC-PREFIX</code></em>, than what + <em class="replaceable"><code>PREFIX</code></em> was set to. This can be useful to + share architecture-independent files between hosts. If you + omit this, then <em class="replaceable"><code>EXEC-PREFIX</code></em> is set equal to + <em class="replaceable"><code>PREFIX</code></em> and both architecture-dependent and + independent files will be installed under the same tree, + which is probably what you want. + </p></dd><dt><span class="term"><code class="option">--bindir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Specifies the directory for executable programs. The default + is <code class="filename"><em class="replaceable"><code>EXEC-PREFIX</code></em>/bin</code>, which + normally means <code class="filename">/usr/local/pgsql/bin</code>. + </p></dd><dt><span class="term"><code class="option">--sysconfdir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the directory for various configuration files, + <code class="filename"><em class="replaceable"><code>PREFIX</code></em>/etc</code> by default. + </p></dd><dt><span class="term"><code class="option">--libdir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the location to install libraries and dynamically loadable + modules. The default is + <code class="filename"><em class="replaceable"><code>EXEC-PREFIX</code></em>/lib</code>. + </p></dd><dt><span class="term"><code class="option">--includedir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the directory for installing C and C++ header files. The + default is <code class="filename"><em class="replaceable"><code>PREFIX</code></em>/include</code>. + </p></dd><dt><span class="term"><code class="option">--datarootdir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the root directory for various types of read-only data + files. This only sets the default for some of the following + options. The default is + <code class="filename"><em class="replaceable"><code>PREFIX</code></em>/share</code>. + </p></dd><dt><span class="term"><code class="option">--datadir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the directory for read-only data files used by the + installed programs. The default is + <code class="filename"><em class="replaceable"><code>DATAROOTDIR</code></em></code>. Note that this has + nothing to do with where your database files will be placed. + </p></dd><dt><span class="term"><code class="option">--localedir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the directory for installing locale data, in particular + message translation catalog files. The default is + <code class="filename"><em class="replaceable"><code>DATAROOTDIR</code></em>/locale</code>. + </p></dd><dt><span class="term"><code class="option">--mandir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + The man pages that come with <span class="productname">PostgreSQL</span> will be installed under + this directory, in their respective + <code class="filename">man<em class="replaceable"><code>x</code></em></code> subdirectories. + The default is <code class="filename"><em class="replaceable"><code>DATAROOTDIR</code></em>/man</code>. + </p></dd><dt><span class="term"><code class="option">--docdir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Sets the root directory for installing documentation files, + except <span class="quote">“<span class="quote">man</span>”</span> pages. This only sets the default for + the following options. The default value for this option is + <code class="filename"><em class="replaceable"><code>DATAROOTDIR</code></em>/doc/postgresql</code>. + </p></dd><dt><span class="term"><code class="option">--htmldir=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + The HTML-formatted documentation for + <span class="productname">PostgreSQL</span> will be installed under + this directory. The default is + <code class="filename"><em class="replaceable"><code>DATAROOTDIR</code></em></code>. + </p></dd></dl></div><div class="note"><h3 class="title">Note</h3><p> + Care has been taken to make it possible to install + <span class="productname">PostgreSQL</span> into shared installation locations + (such as <code class="filename">/usr/local/include</code>) without + interfering with the namespace of the rest of the system. First, + the string <span class="quote">“<span class="quote"><code class="literal">/postgresql</code></span>”</span> is + automatically appended to <code class="varname">datadir</code>, + <code class="varname">sysconfdir</code>, and <code class="varname">docdir</code>, + unless the fully expanded directory name already contains the + string <span class="quote">“<span class="quote"><code class="literal">postgres</code></span>”</span> or + <span class="quote">“<span class="quote"><code class="literal">pgsql</code></span>”</span>. For example, if you choose + <code class="filename">/usr/local</code> as prefix, the documentation will + be installed in <code class="filename">/usr/local/doc/postgresql</code>, + but if the prefix is <code class="filename">/opt/postgres</code>, then it + will be in <code class="filename">/opt/postgres/doc</code>. The public C + header files of the client interfaces are installed into + <code class="varname">includedir</code> and are namespace-clean. The + internal header files and the server header files are installed + into private directories under <code class="varname">includedir</code>. See + the documentation of each interface for information about how to + access its header files. Finally, a private subdirectory will + also be created, if appropriate, under <code class="varname">libdir</code> + for dynamically loadable modules. + </p></div></div><div class="sect3" id="CONFIGURE-OPTIONS-FEATURES"><div class="titlepage"><div><div><h4 class="title">16.4.1.2. <span class="productname">PostgreSQL</span> Features</h4></div></div></div><p> + The options described in this section enable building of + various <span class="productname">PostgreSQL</span> features that are not + built by default. Most of these are non-default only because they + require additional software, as described in + <a class="xref" href="install-requirements.html" title="16.2. Requirements">Section 16.2</a>. + </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">--enable-nls[<span class="optional">=<em class="replaceable"><code>LANGUAGES</code></em></span>]</code></span></dt><dd><p> + Enables Native Language Support (<acronym class="acronym">NLS</acronym>), + that is, the ability to display a program's messages in a + language other than English. + <em class="replaceable"><code>LANGUAGES</code></em> is an optional space-separated + list of codes of the languages that you want supported, for + example <code class="literal">--enable-nls='de fr'</code>. (The intersection + between your list and the set of actually provided + translations will be computed automatically.) If you do not + specify a list, then all available translations are + installed. + </p><p> + To use this option, you will need an implementation of the + <span class="application">Gettext</span> API. + </p></dd><dt><span class="term"><code class="option">--with-perl</code></span></dt><dd><p> + Build the <span class="application">PL/Perl</span> server-side language. + </p></dd><dt><span class="term"><code class="option">--with-python</code></span></dt><dd><p> + Build the <span class="application">PL/Python</span> server-side language. + </p></dd><dt><span class="term"><code class="option">--with-tcl</code></span></dt><dd><p> + Build the <span class="application">PL/Tcl</span> server-side language. + </p></dd><dt><span class="term"><code class="option">--with-tclconfig=<em class="replaceable"><code>DIRECTORY</code></em></code></span></dt><dd><p> + Tcl installs the file <code class="filename">tclConfig.sh</code>, which + contains configuration information needed to build modules + interfacing to Tcl. This file is normally found automatically + at a well-known location, but if you want to use a different + version of Tcl you can specify the directory in which to look + for <code class="filename">tclConfig.sh</code>. + </p></dd><dt><span class="term"><code class="option">--with-icu</code></span></dt><dd><p> + Build with support for + the <span class="productname">ICU</span><a id="id-1.6.3.8.6.5.3.6.2.1.2" class="indexterm"></a> + library, enabling use of ICU collation + features<span class="phrase"> (see + <a class="xref" href="collation.html" title="23.2. Collation Support">Section 23.2</a>)</span>. + This requires the <span class="productname">ICU4C</span> package + to be installed. The minimum required version + of <span class="productname">ICU4C</span> is currently 4.2. + </p><p> + By default, + <span class="productname">pkg-config</span><a id="id-1.6.3.8.6.5.3.6.2.2.2" class="indexterm"></a> + will be used to find the required compilation options. This is + supported for <span class="productname">ICU4C</span> version 4.6 and later. + For older versions, or if <span class="productname">pkg-config</span> is + not available, the variables <code class="envar">ICU_CFLAGS</code> + and <code class="envar">ICU_LIBS</code> can be specified + to <code class="filename">configure</code>, like in this example: +</p><pre class="programlisting"> +./configure ... --with-icu ICU_CFLAGS='-I/some/where/include' ICU_LIBS='-L/some/where/lib -licui18n -licuuc -licudata' +</pre><p> + (If <span class="productname">ICU4C</span> is in the default search path + for the compiler, then you still need to specify nonempty strings in + order to avoid use of <span class="productname">pkg-config</span>, for + example, <code class="literal">ICU_CFLAGS=' '</code>.) + </p></dd><dt id="CONFIGURE-WITH-LLVM"><span class="term"><code class="option">--with-llvm</code></span></dt><dd><p> + Build with support for <span class="productname">LLVM</span> based + <acronym class="acronym">JIT</acronym> compilation<span class="phrase"> (see <a class="xref" href="jit.html" title="Chapter 31. Just-in-Time Compilation (JIT)">Chapter 31</a>)</span>. This + requires the <span class="productname">LLVM</span> library to be installed. + The minimum required version of <span class="productname">LLVM</span> is + currently 3.9. + </p><p> + <code class="command">llvm-config</code><a id="id-1.6.3.8.6.5.3.7.2.2.2" class="indexterm"></a> + will be used to find the required compilation options. + <code class="command">llvm-config</code>, and then + <code class="command">llvm-config-$major-$minor</code> for all supported + versions, will be searched for in your <code class="envar">PATH</code>. If + that would not yield the desired program, + use <code class="envar">LLVM_CONFIG</code> to specify a path to the + correct <code class="command">llvm-config</code>. For example +</p><pre class="programlisting"> +./configure ... --with-llvm LLVM_CONFIG='/path/to/llvm/bin/llvm-config' +</pre><p> + </p><p> + <span class="productname">LLVM</span> support requires a compatible + <code class="command">clang</code> compiler (specified, if necessary, using the + <code class="envar">CLANG</code> environment variable), and a working C++ + compiler (specified, if necessary, using the <code class="envar">CXX</code> + environment variable). + </p></dd><dt><span class="term"><code class="option">--with-openssl</code> + <a id="id-1.6.3.8.6.5.3.8.1.2" class="indexterm"></a> + </span></dt><dd><p> + Build with support for <acronym class="acronym">SSL</acronym> (encrypted) + connections. This requires the <span class="productname">OpenSSL</span> + package to be installed. <code class="filename">configure</code> will check + for the required header files and libraries to make sure that + your <span class="productname">OpenSSL</span> installation is sufficient + before proceeding. + </p></dd><dt><span class="term"><code class="option">--with-gssapi</code></span></dt><dd><p> + Build with support for GSSAPI authentication. On many systems, the + GSSAPI system (usually a part of the Kerberos installation) is not + installed in a location + that is searched by default (e.g., <code class="filename">/usr/include</code>, + <code class="filename">/usr/lib</code>), so you must use the options + <code class="option">--with-includes</code> and <code class="option">--with-libraries</code> in + addition to this option. <code class="filename">configure</code> will check + for the required header files and libraries to make sure that + your GSSAPI installation is sufficient before proceeding. + </p></dd><dt><span class="term"><code class="option">--with-ldap</code></span></dt><dd><p> + Build with <acronym class="acronym">LDAP</acronym><a id="id-1.6.3.8.6.5.3.10.2.1.2" class="indexterm"></a> + support for authentication and connection parameter lookup (see + <span id="INSTALL-LDAP-LINKS" class="phrase"><a class="xref" href="libpq-ldap.html" title="33.17. LDAP Lookup of Connection Parameters">Section 33.17</a> and + <a class="xref" href="auth-ldap.html" title="20.10. LDAP Authentication">Section 20.10</a></span> for more information). On Unix, + this requires the <span class="productname">OpenLDAP</span> package to be + installed. On Windows, the default <span class="productname">WinLDAP</span> + library is used. <code class="filename">configure</code> will check for the required + header files and libraries to make sure that your + <span class="productname">OpenLDAP</span> installation is sufficient before + proceeding. + </p></dd><dt><span class="term"><code class="option">--with-pam</code></span></dt><dd><p> + Build with <acronym class="acronym">PAM</acronym><a id="id-1.6.3.8.6.5.3.11.2.1.2" class="indexterm"></a> + (Pluggable Authentication Modules) support. + </p></dd><dt><span class="term"><code class="option">--with-bsd-auth</code></span></dt><dd><p> + Build with BSD Authentication support. + (The BSD Authentication framework is + currently only available on OpenBSD.) + </p></dd><dt><span class="term"><code class="option">--with-systemd</code></span></dt><dd><p> + Build with support + for <span class="application">systemd</span><a id="id-1.6.3.8.6.5.3.13.2.1.2" class="indexterm"></a> + service notifications. This improves integration if the server + is started under <span class="application">systemd</span> but has no impact + otherwise<span class="phrase">; see <a class="xref" href="server-start.html" title="18.3. Starting the Database Server">Section 18.3</a> for more + information</span>. <span class="application">libsystemd</span> and the + associated header files need to be installed to use this option. + </p></dd><dt><span class="term"><code class="option">--with-bonjour</code></span></dt><dd><p> + Build with support for Bonjour automatic service discovery. + This requires Bonjour support in your operating system. + Recommended on macOS. + </p></dd><dt><span class="term"><code class="option">--with-uuid=<em class="replaceable"><code>LIBRARY</code></em></code></span></dt><dd><p> + Build the <a class="xref" href="uuid-ossp.html" title="F.44. uuid-ossp">uuid-ossp</a> module + (which provides functions to generate UUIDs), using the specified + UUID library.<a id="id-1.6.3.8.6.5.3.15.2.1.2" class="indexterm"></a> + <em class="replaceable"><code>LIBRARY</code></em> must be one of: + </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p> + <code class="option">bsd</code> to use the UUID functions found in FreeBSD, NetBSD, + and some other BSD-derived systems + </p></li><li class="listitem"><p> + <code class="option">e2fs</code> to use the UUID library created by + the <code class="literal">e2fsprogs</code> project; this library is present in most + Linux systems and in macOS, and can be obtained for other + platforms as well + </p></li><li class="listitem"><p> + <code class="option">ossp</code> to use the <a class="ulink" href="http://www.ossp.org/pkg/lib/uuid/" target="_top">OSSP UUID library</a> + </p></li></ul></div></dd><dt><span class="term"><code class="option">--with-ossp-uuid</code></span></dt><dd><p> + Obsolete equivalent of <code class="literal">--with-uuid=ossp</code>. + </p></dd><dt><span class="term"><code class="option">--with-libxml</code></span></dt><dd><p> + Build with libxml2, enabling SQL/XML support. Libxml2 version 2.6.23 or + later is required for this feature. + </p><p> + To detect the required compiler and linker options, PostgreSQL will + query <code class="command">pkg-config</code>, if that is installed and knows + about libxml2. Otherwise the program <code class="command">xml2-config</code>, + which is installed by libxml2, will be used if it is found. Use + of <code class="command">pkg-config</code> is preferred, because it can deal + with multi-architecture installations better. + </p><p> + To use a libxml2 installation that is in an unusual location, you + can set <code class="command">pkg-config</code>-related environment + variables (see its documentation), or set the environment variable + <code class="envar">XML2_CONFIG</code> to point to + the <code class="command">xml2-config</code> program belonging to the libxml2 + installation, or set the variables <code class="envar">XML2_CFLAGS</code> + and <code class="envar">XML2_LIBS</code>. (If <code class="command">pkg-config</code> is + installed, then to override its idea of where libxml2 is you must + either set <code class="envar">XML2_CONFIG</code> or set + both <code class="envar">XML2_CFLAGS</code> and <code class="envar">XML2_LIBS</code> to + nonempty strings.) + </p></dd><dt><span class="term"><code class="option">--with-libxslt</code></span></dt><dd><p> + Build with libxslt, enabling the + <a class="xref" href="xml2.html" title="F.45. xml2">xml2</a> + module to perform XSL transformations of XML. + <code class="option">--with-libxml</code> must be specified as well. + </p></dd></dl></div></div><div class="sect3" id="CONFIGURE-OPTIONS-ANTI-FEATURES"><div class="titlepage"><div><div><h4 class="title">16.4.1.3. Anti-Features</h4></div></div></div><p> + The options described in this section allow disabling + certain <span class="productname">PostgreSQL</span> features that are built + by default, but which might need to be turned off if the required + software or system features are not available. Using these options is + not recommended unless really necessary. + </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">--without-readline</code></span></dt><dd><p> + Prevents use of the <span class="application">Readline</span> library + (and <span class="application">libedit</span> as well). This option disables + command-line editing and history in + <span class="application">psql</span>. + </p></dd><dt><span class="term"><code class="option">--with-libedit-preferred</code></span></dt><dd><p> + Favors the use of the BSD-licensed <span class="application">libedit</span> library + rather than GPL-licensed <span class="application">Readline</span>. This option + is significant only if you have both libraries installed; the + default in that case is to use <span class="application">Readline</span>. + </p></dd><dt><span class="term"><code class="option">--without-zlib</code></span></dt><dd><p> + <a id="id-1.6.3.8.6.6.3.3.2.1.1" class="indexterm"></a> + Prevents use of the <span class="application">Zlib</span> library. + This disables + support for compressed archives in <span class="application">pg_dump</span> + and <span class="application">pg_restore</span>. + </p></dd><dt><span class="term"><code class="option">--disable-spinlocks</code></span></dt><dd><p> + Allow the build to succeed even if <span class="productname">PostgreSQL</span> + has no CPU spinlock support for the platform. The lack of + spinlock support will result in very poor performance; therefore, + this option should only be used if the build aborts and + informs you that the platform lacks spinlock support. If this + option is required to build <span class="productname">PostgreSQL</span> on + your platform, please report the problem to the + <span class="productname">PostgreSQL</span> developers. + </p></dd><dt><span class="term"><code class="option">--disable-atomics</code></span></dt><dd><p> + Disable use of CPU atomic operations. This option does nothing on + platforms that lack such operations. On platforms that do have + them, this will result in poor performance. This option is only + useful for debugging or making performance comparisons. + </p></dd><dt><span class="term"><code class="option">--disable-thread-safety</code></span></dt><dd><p> + Disable the thread-safety of client libraries. This prevents + concurrent threads in <span class="application">libpq</span> and + <span class="application">ECPG</span> programs from safely controlling + their private connection handles. Use this only on platforms + with deficient threading support. + </p></dd></dl></div></div><div class="sect3" id="CONFIGURE-OPTIONS-BUILD-PROCESS"><div class="titlepage"><div><div><h4 class="title">16.4.1.4. Build Process Details</h4></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">--with-includes=<em class="replaceable"><code>DIRECTORIES</code></em></code></span></dt><dd><p> + <em class="replaceable"><code>DIRECTORIES</code></em> is a colon-separated list of + directories that will be added to the list the compiler + searches for header files. If you have optional packages + (such as GNU <span class="application">Readline</span>) installed in a non-standard + location, + you have to use this option and probably also the corresponding + <code class="option">--with-libraries</code> option. + </p><p> + Example: <code class="literal">--with-includes=/opt/gnu/include:/usr/sup/include</code>. + </p></dd><dt><span class="term"><code class="option">--with-libraries=<em class="replaceable"><code>DIRECTORIES</code></em></code></span></dt><dd><p> + <em class="replaceable"><code>DIRECTORIES</code></em> is a colon-separated list of + directories to search for libraries. You will probably have + to use this option (and the corresponding + <code class="option">--with-includes</code> option) if you have packages + installed in non-standard locations. + </p><p> + Example: <code class="literal">--with-libraries=/opt/gnu/lib:/usr/sup/lib</code>. + </p></dd><dt><span class="term"><code class="option">--with-system-tzdata=<em class="replaceable"><code>DIRECTORY</code></em></code> + <a id="id-1.6.3.8.6.7.2.3.1.2" class="indexterm"></a> + </span></dt><dd><p> + <span class="productname">PostgreSQL</span> includes its own time zone database, + which it requires for date and time operations. This time zone + database is in fact compatible with the IANA time zone + database provided by many operating systems such as FreeBSD, + Linux, and Solaris, so it would be redundant to install it again. + When this option is used, the system-supplied time zone database + in <em class="replaceable"><code>DIRECTORY</code></em> is used instead of the one + included in the PostgreSQL source distribution. + <em class="replaceable"><code>DIRECTORY</code></em> must be specified as an + absolute path. <code class="filename">/usr/share/zoneinfo</code> is a + likely directory on some operating systems. Note that the + installation routine will not detect mismatching or erroneous time + zone data. If you use this option, you are advised to run the + regression tests to verify that the time zone data you have + pointed to works correctly with <span class="productname">PostgreSQL</span>. + </p><a id="id-1.6.3.8.6.7.2.3.2.2" class="indexterm"></a><p> + This option is mainly aimed at binary package distributors + who know their target operating system well. The main + advantage of using this option is that the PostgreSQL package + won't need to be upgraded whenever any of the many local + daylight-saving time rules change. Another advantage is that + PostgreSQL can be cross-compiled more straightforwardly if the + time zone database files do not need to be built during the + installation. + </p></dd><dt><span class="term"><code class="option">--with-extra-version=<em class="replaceable"><code>STRING</code></em></code></span></dt><dd><p> + Append <em class="replaceable"><code>STRING</code></em> to the PostgreSQL version number. You + can use this, for example, to mark binaries built from unreleased Git + snapshots or containing custom patches with an extra version string, + such as a <code class="command">git describe</code> identifier or a + distribution package release number. + </p></dd><dt><span class="term"><code class="option">--disable-rpath</code></span></dt><dd><p> + Do not mark <span class="productname">PostgreSQL</span>'s executables + to indicate that they should search for shared libraries in the + installation's library directory (see <code class="option">--libdir</code>). + On most platforms, this marking uses an absolute path to the + library directory, so that it will be unhelpful if you relocate + the installation later. However, you will then need to provide + some other way for the executables to find the shared libraries. + Typically this requires configuring the operating system's + dynamic linker to search the library directory; see + <a class="xref" href="install-post.html#INSTALL-POST-SHLIBS" title="16.5.1. Shared Libraries">Section 16.5.1</a> for more detail. + </p></dd></dl></div></div><div class="sect3" id="CONFIGURE-OPTIONS-MISC"><div class="titlepage"><div><div><h4 class="title">16.4.1.5. Miscellaneous</h4></div></div></div><p> + It's fairly common, particularly for test builds, to adjust the + default port number with <code class="option">--with-pgport</code>. + The other options in this section are recommended only for advanced + users. + </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">--with-pgport=<em class="replaceable"><code>NUMBER</code></em></code></span></dt><dd><p> + Set <em class="replaceable"><code>NUMBER</code></em> as the default port number for + server and clients. The default is 5432. The port can always + be changed later on, but if you specify it here then both + server and clients will have the same default compiled in, + which can be very convenient. Usually the only good reason + to select a non-default value is if you intend to run multiple + <span class="productname">PostgreSQL</span> servers on the same machine. + </p></dd><dt><span class="term"><code class="option">--with-krb-srvnam=<em class="replaceable"><code>NAME</code></em></code></span></dt><dd><p> + The default name of the Kerberos service principal used + by GSSAPI. + <code class="literal">postgres</code> is the default. There's usually no + reason to change this unless you are building for a Windows + environment, in which case it must be set to upper case + <code class="literal">POSTGRES</code>. + </p></dd><dt><span class="term"><code class="option">--with-segsize=<em class="replaceable"><code>SEGSIZE</code></em></code></span></dt><dd><p> + Set the <em class="firstterm">segment size</em>, in gigabytes. Large tables are + divided into multiple operating-system files, each of size equal + to the segment size. This avoids problems with file size limits + that exist on many platforms. The default segment size, 1 gigabyte, + is safe on all supported platforms. If your operating system has + <span class="quote">“<span class="quote">largefile</span>”</span> support (which most do, nowadays), you can use + a larger segment size. This can be helpful to reduce the number of + file descriptors consumed when working with very large tables. + But be careful not to select a value larger than is supported + by your platform and the file systems you intend to use. Other + tools you might wish to use, such as <span class="application">tar</span>, could + also set limits on the usable file size. + It is recommended, though not absolutely required, that this value + be a power of 2. + Note that changing this value breaks on-disk database compatibility, + meaning you cannot use <code class="command">pg_upgrade</code> to upgrade to + a build with a different segment size. + </p></dd><dt><span class="term"><code class="option">--with-blocksize=<em class="replaceable"><code>BLOCKSIZE</code></em></code></span></dt><dd><p> + Set the <em class="firstterm">block size</em>, in kilobytes. This is the unit + of storage and I/O within tables. The default, 8 kilobytes, + is suitable for most situations; but other values may be useful + in special cases. + The value must be a power of 2 between 1 and 32 (kilobytes). + Note that changing this value breaks on-disk database compatibility, + meaning you cannot use <code class="command">pg_upgrade</code> to upgrade to + a build with a different block size. + </p></dd><dt><span class="term"><code class="option">--with-wal-blocksize=<em class="replaceable"><code>BLOCKSIZE</code></em></code></span></dt><dd><p> + Set the <em class="firstterm">WAL block size</em>, in kilobytes. This is the unit + of storage and I/O within the WAL log. The default, 8 kilobytes, + is suitable for most situations; but other values may be useful + in special cases. + The value must be a power of 2 between 1 and 64 (kilobytes). + Note that changing this value breaks on-disk database compatibility, + meaning you cannot use <code class="command">pg_upgrade</code> to upgrade to + a build with a different WAL block size. + </p></dd></dl></div></div><div class="sect3" id="CONFIGURE-OPTIONS-DEVEL"><div class="titlepage"><div><div><h4 class="title">16.4.1.6. Developer Options</h4></div></div></div><p> + Most of the options in this section are only of interest for + developing or debugging <span class="productname">PostgreSQL</span>. + They are not recommended for production builds, except + for <code class="option">--enable-debug</code>, which can be useful to enable + detailed bug reports in the unlucky event that you encounter a bug. + On platforms supporting DTrace, <code class="option">--enable-dtrace</code> + may also be reasonable to use in production. + </p><p> + When building an installation that will be used to develop code inside + the server, it is recommended to use at least the + options <code class="option">--enable-debug</code> + and <code class="option">--enable-cassert</code>. + </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">--enable-debug</code></span></dt><dd><p> + Compiles all programs and libraries with debugging symbols. + This means that you can run the programs in a debugger + to analyze problems. This enlarges the size of the installed + executables considerably, and on non-GCC compilers it usually + also disables compiler optimization, causing slowdowns. However, + having the symbols available is extremely helpful for dealing + with any problems that might arise. Currently, this option is + recommended for production installations only if you use GCC. + But you should always have it on if you are doing development work + or running a beta version. + </p></dd><dt><span class="term"><code class="option">--enable-cassert</code></span></dt><dd><p> + Enables <em class="firstterm">assertion</em> checks in the server, which test for + many <span class="quote">“<span class="quote">cannot happen</span>”</span> conditions. This is invaluable for + code development purposes, but the tests can slow down the + server significantly. + Also, having the tests turned on won't necessarily enhance the + stability of your server! The assertion checks are not categorized + for severity, and so what might be a relatively harmless bug will + still lead to server restarts if it triggers an assertion + failure. This option is not recommended for production use, but + you should have it on for development work or when running a beta + version. + </p></dd><dt><span class="term"><code class="option">--enable-tap-tests</code></span></dt><dd><p> + Enable tests using the Perl TAP tools. This requires a Perl + installation and the Perl module <code class="literal">IPC::Run</code>. + <span class="phrase">See <a class="xref" href="regress-tap.html" title="32.4. TAP Tests">Section 32.4</a> for more information.</span> + </p></dd><dt><span class="term"><code class="option">--enable-depend</code></span></dt><dd><p> + Enables automatic dependency tracking. With this option, the + makefiles are set up so that all affected object files will + be rebuilt when any header file is changed. This is useful + if you are doing development work, but is just wasted overhead + if you intend only to compile once and install. At present, + this option only works with GCC. + </p></dd><dt><span class="term"><code class="option">--enable-coverage</code></span></dt><dd><p> + If using GCC, all programs and libraries are compiled with + code coverage testing instrumentation. When run, they + generate files in the build directory with code coverage + metrics. + <span class="phrase">See <a class="xref" href="regress-coverage.html" title="32.5. Test Coverage Examination">Section 32.5</a> + for more information.</span> This option is for use only with GCC + and when doing development work. + </p></dd><dt><span class="term"><code class="option">--enable-profiling</code></span></dt><dd><p> + If using GCC, all programs and libraries are compiled so they + can be profiled. On backend exit, a subdirectory will be created + that contains the <code class="filename">gmon.out</code> file containing + profile data. + This option is for use only with GCC and when doing development work. + </p></dd><dt><span class="term"><code class="option">--enable-dtrace</code></span></dt><dd><p> + <a id="id-1.6.3.8.6.9.4.7.2.1.1" class="indexterm"></a> + Compiles <span class="productname">PostgreSQL</span> with support for the + dynamic tracing tool DTrace. + <span class="phrase">See <a class="xref" href="dynamic-trace.html" title="27.5. Dynamic Tracing">Section 27.5</a> + for more information.</span> + </p><p> + To point to the <code class="command">dtrace</code> program, the + environment variable <code class="envar">DTRACE</code> can be set. This + will often be necessary because <code class="command">dtrace</code> is + typically installed under <code class="filename">/usr/sbin</code>, + which might not be in your <code class="envar">PATH</code>. + </p><p> + Extra command-line options for the <code class="command">dtrace</code> program + can be specified in the environment variable + <code class="envar">DTRACEFLAGS</code>. On Solaris, + to include DTrace support in a 64-bit binary, you must specify + <code class="literal">DTRACEFLAGS="-64"</code>. For example, + using the GCC compiler: +</p><pre class="screen"> +./configure CC='gcc -m64' --enable-dtrace DTRACEFLAGS='-64' ... +</pre><p> + Using Sun's compiler: +</p><pre class="screen"> +./configure CC='/opt/SUNWspro/bin/cc -xtarget=native64' --enable-dtrace DTRACEFLAGS='-64' ... +</pre><p> + </p></dd></dl></div></div></div><div class="sect2" id="CONFIGURE-ENVVARS"><div class="titlepage"><div><div><h3 class="title">16.4.2. <code class="filename">configure</code> Environment Variables</h3></div></div></div><a id="id-1.6.3.8.7.2" class="indexterm"></a><p> + In addition to the ordinary command-line options described above, + <code class="filename">configure</code> responds to a number of environment + variables. + You can specify environment variables on the + <code class="filename">configure</code> command line, for example: +</p><pre class="screen"> +<strong class="userinput"><code>./configure CC=/opt/bin/gcc CFLAGS='-O2 -pipe'</code></strong> +</pre><p> + In this usage an environment variable is little different from a + command-line option. + You can also set such variables beforehand: +</p><pre class="screen"> +<strong class="userinput"><code>export CC=/opt/bin/gcc</code></strong> +<strong class="userinput"><code>export CFLAGS='-O2 -pipe'</code></strong> +<strong class="userinput"><code>./configure</code></strong> +</pre><p> + This usage can be convenient because many programs' configuration + scripts respond to these variables in similar ways. + </p><p> + The most commonly used of these environment variables are + <code class="envar">CC</code> and <code class="envar">CFLAGS</code>. + If you prefer a C compiler different from the one + <code class="filename">configure</code> picks, you can set the + variable <code class="envar">CC</code> to the program of your choice. + By default, <code class="filename">configure</code> will pick + <code class="filename">gcc</code> if available, else the platform's + default (usually <code class="filename">cc</code>). Similarly, you can override the + default compiler flags if needed with the <code class="envar">CFLAGS</code> variable. + </p><p> + Here is a list of the significant variables that can be set in + this manner: + + </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="envar">BISON</code></span></dt><dd><p> + Bison program + </p></dd><dt><span class="term"><code class="envar">CC</code></span></dt><dd><p> + C compiler + </p></dd><dt><span class="term"><code class="envar">CFLAGS</code></span></dt><dd><p> + options to pass to the C compiler + </p></dd><dt><span class="term"><code class="envar">CLANG</code></span></dt><dd><p> + path to <code class="command">clang</code> program used to process source code + for inlining when compiling with <code class="literal">--with-llvm</code> + </p></dd><dt><span class="term"><code class="envar">CPP</code></span></dt><dd><p> + C preprocessor + </p></dd><dt><span class="term"><code class="envar">CPPFLAGS</code></span></dt><dd><p> + options to pass to the C preprocessor + </p></dd><dt><span class="term"><code class="envar">CXX</code></span></dt><dd><p> + C++ compiler + </p></dd><dt><span class="term"><code class="envar">CXXFLAGS</code></span></dt><dd><p> + options to pass to the C++ compiler + </p></dd><dt><span class="term"><code class="envar">DTRACE</code></span></dt><dd><p> + location of the <code class="command">dtrace</code> program + </p></dd><dt><span class="term"><code class="envar">DTRACEFLAGS</code></span></dt><dd><p> + options to pass to the <code class="command">dtrace</code> program + </p></dd><dt><span class="term"><code class="envar">FLEX</code></span></dt><dd><p> + Flex program + </p></dd><dt><span class="term"><code class="envar">LDFLAGS</code></span></dt><dd><p> + options to use when linking either executables or shared libraries + </p></dd><dt><span class="term"><code class="envar">LDFLAGS_EX</code></span></dt><dd><p> + additional options for linking executables only + </p></dd><dt><span class="term"><code class="envar">LDFLAGS_SL</code></span></dt><dd><p> + additional options for linking shared libraries only + </p></dd><dt><span class="term"><code class="envar">LLVM_CONFIG</code></span></dt><dd><p> + <code class="command">llvm-config</code> program used to locate the + <span class="productname">LLVM</span> installation + </p></dd><dt><span class="term"><code class="envar">MSGFMT</code></span></dt><dd><p> + <code class="command">msgfmt</code> program for native language support + </p></dd><dt><span class="term"><code class="envar">PERL</code></span></dt><dd><p> + Perl interpreter program. This will be used to determine the + dependencies for building PL/Perl. The default is + <code class="command">perl</code>. + </p></dd><dt><span class="term"><code class="envar">PYTHON</code></span></dt><dd><p> + Python interpreter program. This will be used to + determine the dependencies for building PL/Python. Also, + whether Python 2 or 3 is specified here (or otherwise + implicitly chosen) determines which variant of the PL/Python + language becomes available. See + <a class="xref" href="plpython-python23.html" title="45.1. Python 2 vs. Python 3">Section 45.1</a> + for more information. If this is not set, the following are probed + in this order: <code class="literal">python python3 python2</code>. + </p></dd><dt><span class="term"><code class="envar">TCLSH</code></span></dt><dd><p> + Tcl interpreter program. This will be used to + determine the dependencies for building PL/Tcl. + If this is not set, the following are probed in this + order: <code class="literal">tclsh tcl tclsh8.6 tclsh86 tclsh8.5 tclsh85 + tclsh8.4 tclsh84</code>. + </p></dd><dt><span class="term"><code class="envar">XML2_CONFIG</code></span></dt><dd><p> + <code class="command">xml2-config</code> program used to locate the + libxml2 installation + </p></dd></dl></div><p> + </p><p> + Sometimes it is useful to add compiler flags after-the-fact to the set + that were chosen by <code class="filename">configure</code>. An important example is + that <span class="application">gcc</span>'s <code class="option">-Werror</code> option cannot be included + in the <code class="envar">CFLAGS</code> passed to <code class="filename">configure</code>, because + it will break many of <code class="filename">configure</code>'s built-in tests. To add + such flags, include them in the <code class="envar">COPT</code> environment variable + while running <code class="filename">make</code>. The contents of <code class="envar">COPT</code> + are added to both the <code class="envar">CFLAGS</code> and <code class="envar">LDFLAGS</code> + options set up by <code class="filename">configure</code>. For example, you could do +</p><pre class="screen"> +<strong class="userinput"><code>make COPT='-Werror'</code></strong> +</pre><p> + or +</p><pre class="screen"> +<strong class="userinput"><code>export COPT='-Werror'</code></strong> +<strong class="userinput"><code>make</code></strong> +</pre><p> + </p><div class="note"><h3 class="title">Note</h3><p> + If using GCC, it is best to build with an optimization level of + at least <code class="option">-O1</code>, because using no optimization + (<code class="option">-O0</code>) disables some important compiler warnings (such + as the use of uninitialized variables). However, non-zero + optimization levels can complicate debugging because stepping + through compiled code will usually not match up one-to-one with + source code lines. If you get confused while trying to debug + optimized code, recompile the specific files of interest with + <code class="option">-O0</code>. An easy way to do this is by passing an option + to <span class="application">make</span>: <code class="command">make PROFILE=-O0 file.o</code>. + </p><p> + The <code class="envar">COPT</code> and <code class="envar">PROFILE</code> environment variables are + actually handled identically by the <span class="productname">PostgreSQL</span> + makefiles. Which to use is a matter of preference, but a common habit + among developers is to use <code class="envar">PROFILE</code> for one-time flag + adjustments, while <code class="envar">COPT</code> might be kept set all the time. + </p></div></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="install-getsource.html" title="16.3. Getting the Source">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="installation.html" title="Chapter 16. Installation from Source Code">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="install-post.html" title="16.5. Post-Installation Setup">Next</a></td></tr><tr><td width="40%" align="left" valign="top">16.3. 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