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gerrit-public.fairphone.software / platform / external / llvm / 046fa3f90a31ebfa10df89ae348f478d492709a9 / . / docs / Projects.html
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Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
2 "http://www.w3.org/TR/html4/strict.dtd">
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]3<html>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]4<head>
5 <title>Creating an LLVM Project</title>
6 <link rel="stylesheet" href="llvm.css" type="text/css">
7</head>
8<body>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]9
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]10<div class="doc_title">Creating an LLVM Project</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]11
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]12<ol>
13<li><a href="#overview">Overview</a></li>
14<li><a href="#create">Create a project from the Sample Project</a></li>
15<li><a href="#source">Source tree layout</a></li>
16<li><a href="#makefiles">Writing LLVM-style Makefiles</a>
17 <ol>
18 <li><a href="#reqVars">Required Variables</a></li>
19 <li><a href="#varsBuildDir">Variables for Building Subdirectories</a></li>
20 <li><a href="#varsBuildLib">Variables for Building Libraries</a></li>
21 <li><a href="#varsBuildProg">Variables for Building Programs</a></li>
22 <li><a href="#miscVars">Miscellaneous Variables</a></li>
23 </ol></li>
24<li><a href="#objcode">Placement of object code</a></li>
25<li><a href="#help">Further help</a></li>
26</ol>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]27
Chris Lattner7911ce22004-05-23 21:07:27 +0000[diff] [blame]28<div class="doc_author">
29 <p>Written by John Criswell</p>
30</div>
31
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]32<!-- *********************************************************************** -->
33<div class="doc_section"><a name="overview">Overview</a></div>
34<!-- *********************************************************************** -->
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]35
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]36<div class="doc_text">
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]37
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]38<p>The LLVM build system is designed to facilitate the building of third party
39projects that use LLVM header files, libraries, and tools. In order to use
40these facilities, a Makefile from a project must do the following things:</p>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]41
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]42<ol>
Reid Spencer39865c02005-01-16 02:21:18 +0000[diff] [blame]43 <li>Set <tt>make</tt> variables. There are several variables that a Makefile
44 needs to set to use the LLVM build system:
45 <ul>
46 <li><tt>PROJECT_NAME</tt> - The name by which your project is known.</li>
47 <li><tt>LLVM_SRC_ROOT</tt> - The root of the LLVM source tree.</li>
48 <li><tt>LLVM_OBJ_ROOT</tt> - The root of the LLVM object tree.</li>
49 <li><tt>PROJ_SRC_ROOT</tt> - The root of the project's source tree.</li>
50 <li><tt>PROJ_OBJ_ROOT</tt> - The root of the project's object tree.</li>
51 <li><tt>PROJ_INSTALL_ROOT</tt> - The root installation directory.</li>
52 <li><tt>LEVEL</tt> - The relative path from the current directory to the
53 project's root ($PROJ_OBJ_ROOT).</li>
54 </ul></li>
55 <li>Include <tt>Makefile.config</tt> from <tt>$(LLVM_OBJ_ROOT)</tt>.</li>
56 <li>Include <tt>Makefile.rules</tt> from <tt>$(LLVM_SRC_ROOT)</tt>.</li>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]57</ol>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]58
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]59<p>There are two ways that you can set all of these variables:</p>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]60<ol>
Reid Spencer39865c02005-01-16 02:21:18 +0000[diff] [blame]61 <li>You can write your own Makefiles which hard-code these values.</li>
62 <li>You can use the pre-made LLVM sample project. This sample project
63 includes Makefiles, a configure script that can be used to configure the
64 location of LLVM, and the ability to support multiple object directories
65 from a single source directory.</li>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]66</ol>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]67
Reid Spencer39865c02005-01-16 02:21:18 +0000[diff] [blame]68<p>This document assumes that you will base your project on the LLVM sample
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]69project found in <tt>llvm/projects/sample</tt>. If you want to devise your own
70build system, studying the sample project and LLVM Makefiles will probably
71provide enough information on how to write your own Makefiles.</p>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]72
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]73</div>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]74
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]75<!-- *********************************************************************** -->
76<div class="doc_section">
77 <a name="create">Create a Project from the Sample Project</a>
78</div>
79<!-- *********************************************************************** -->
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]80
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]81<div class="doc_text">
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]82
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]83<p>Follow these simple steps to start your project:</p>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]84
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]85<ol>
86<li>Copy the <tt>llvm/projects/sample</tt> directory to any place of your
87choosing. You can place it anywhere you like. Rename the directory to match
88the name of your project.</li>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]89
John Criswellff3468e2005-10-24 16:43:08 +0000[diff] [blame]90<li>
Reid Spencer669ed452007-07-09 08:04:31 +0000[diff] [blame]91If you downloaded LLVM using Subversion, remove all the directories named .svn
92(and all the files therein) from your project's new source tree. This will
93keep Subversion from thinking that your project is inside
94<tt>llvm/trunk/projects/sample</tt>.</li>
John Criswellff3468e2005-10-24 16:43:08 +0000[diff] [blame]95
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]96<li>Add your source code and Makefiles to your source tree.</li>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]97
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]98<li>If you want your project to be configured with the <tt>configure</tt> script
99then you need to edit <tt>autoconf/configure.ac</tt> as follows:
100 <ul>
101 <li><b>AC_INIT</b>. Place the name of your project, its version number and
102 a contact email address for your project as the arguments to this macro</li>
Chris Lattner623751f2006-03-16 16:14:59 +0000[diff] [blame]103 <li><b>AC_CONFIG_AUX_DIR</b>. If your project isn't in the
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]104 <tt>llvm/projects</tt> directory then you might need to adjust this so that
105 it specifies a relative path to the <tt>llvm/autoconf</tt> directory.</li>
106 <li><b>LLVM_CONFIG_PROJECT</b>. Just leave this alone.</li>
107 <li><b>AC_CONFIG_SRCDIR</b>. Specify a path to a file name that identifies
Reid Spencer64f99302006-03-17 08:04:25 +0000[diff] [blame]108 your project; or just leave it at <tt>Makefile.common.in</tt></li>
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]109 <li><b>AC_CONFIG_FILES</b>. Do not change.</li>
110 <li><b>AC_CONFIG_MAKEFILE</b>. Use one of these macros for each Makefile
111 that your project uses. This macro arranges for your makefiles to be copied
112 from the source directory, unmodified, to the build directory.</li>
113 </ul>
114</li>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]115
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]116<li>After updating <tt>autoconf/configure.ac</tt>, regenerate the
117configure script with these commands:
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]118
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]119<div class="doc_code">
120<p><tt>% cd autoconf<br>
Dan Gohman30e5e552009-01-12 21:29:24 +0000[diff] [blame]121 % ./AutoRegen.sh</tt></p>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]122</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]123
Misha Brukman0f6d5f82009-08-13 20:08:52 +0000[diff] [blame]124<p>You must be using Autoconf version 2.59 or later and your aclocal version
125should be 1.9 or later.</p></li>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]126
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]127<li>Run <tt>configure</tt> in the directory in which you want to place
128object code. Use the following options to tell your project where it
129can find LLVM:
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]130
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]131 <dl>
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]132 <dt><tt>--with-llvmsrc=&lt;directory&gt;</tt></dt>
133 <dd>Tell your project where the LLVM source tree is located.</dd>
Misha Brukmanf00ddb02008-12-11 18:23:24 +0000[diff] [blame]134 <dt><br><tt>--with-llvmobj=&lt;directory&gt;</tt></dt>
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]135 <dd>Tell your project where the LLVM object tree is located.</dd>
Misha Brukmanf00ddb02008-12-11 18:23:24 +0000[diff] [blame]136 <dt><br><tt>--prefix=&lt;directory&gt;</tt></dt>
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]137 <dd>Tell your project where it should get installed.</dd>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]138 </dl>
139</ol>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]140
Reid Spencer5175b822005-02-28 00:40:29 +0000[diff] [blame]141<p>That's it! Now all you have to do is type <tt>gmake</tt> (or <tt>make</tt>
142if your on a GNU/Linux system) in the root of your object directory, and your
143project should build.</p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]144
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]145</div>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]146
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]147<!-- *********************************************************************** -->
148<div class="doc_section">
149 <a name="source">Source Tree Layout</a>
150</div>
151<!-- *********************************************************************** -->
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]152
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]153<div class="doc_text">
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]154
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]155<p>In order to use the LLVM build system, you will want to organize your
156source code so that it can benefit from the build system's features.
157Mainly, you want your source tree layout to look similar to the LLVM
158source tree layout. The best way to do this is to just copy the
159project tree from <tt>llvm/projects/sample</tt> and modify it to meet
160your needs, but you can certainly add to it if you want.</p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]161
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]162<p>Underneath your top level directory, you should have the following
163directories:</p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]164
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]165<dl>
166 <dt><b>lib</b>
167 <dd>
168 This subdirectory should contain all of your library source
169 code. For each library that you build, you will have one
170 directory in <b>lib</b> that will contain that library's source
171 code.
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]172
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]173 <p>
174 Libraries can be object files, archives, or dynamic libraries.
175 The <b>lib</b> directory is just a convenient place for libraries
176 as it places them all in a directory from which they can be linked
177 later.
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]178
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]179 <dt><b>include</b>
180 <dd>
181 This subdirectory should contain any header files that are
182 global to your project. By global, we mean that they are used
183 by more than one library or executable of your project.
184 <p>
185 By placing your header files in <b>include</b>, they will be
186 found automatically by the LLVM build system. For example, if
187 you have a file <b>include/jazz/note.h</b>, then your source
188 files can include it simply with <b>#include "jazz/note.h"</b>.
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]189
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]190 <dt><b>tools</b>
191 <dd>
192 This subdirectory should contain all of your source
193 code for executables. For each program that you build, you
194 will have one directory in <b>tools</b> that will contain that
195 program's source code.
196 <p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]197
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]198 <dt><b>test</b>
199 <dd>
200 This subdirectory should contain tests that verify that your code
201 works correctly. Automated tests are especially useful.
202 <p>
Tanya Lattnerd10bc6e2004-12-08 17:25:46 +0000[diff] [blame]203 Currently, the LLVM build system provides basic support for tests.
204 The LLVM system provides the following:
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]205 <ul>
206 <li>
Tanya Lattnerd10bc6e2004-12-08 17:25:46 +0000[diff] [blame]207 LLVM provides a tcl procedure that is used by Dejagnu to run
208 tests. It can be found in <tt>llvm/lib/llvm-dg.exp</tt>. This
209 test procedure uses RUN lines in the actual test case to determine
210 how to run the test. See the <a
211 href="TestingGuide.html">TestingGuide</a> for more details. You
Reid Spencerf8b235d2005-02-28 01:10:48 +0000[diff] [blame]212 can easily write Makefile support similar to the Makefiles in
Misha Brukmanf00ddb02008-12-11 18:23:24 +0000[diff] [blame]213 <tt>llvm/test</tt> to use Dejagnu to run your project's tests.<br></li>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]214 <li>
John Criswell9e2485c2004-12-10 15:51:16 +0000[diff] [blame]215 LLVM contains an optional package called <tt>llvm-test</tt>
216 which provides benchmarks and programs that are known to compile with the
217 LLVM GCC front ends. You can use these
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]218 programs to test your code, gather statistics information, and
John Criswell9e2485c2004-12-10 15:51:16 +0000[diff] [blame]219 compare it to the current LLVM performance statistics.
Misha Brukmanf00ddb02008-12-11 18:23:24 +0000[diff] [blame]220 <br>Currently, there is no way to hook your tests directly into the
John Criswell9e2485c2004-12-10 15:51:16 +0000[diff] [blame]221 <tt>llvm/test</tt> testing harness. You will simply
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]222 need to find a way to use the source provided within that directory
223 on your own.
224 </ul>
225</dl>
John Criswell2b89a6a2003-10-21 19:35:06 +0000[diff] [blame]226
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]227<p>Typically, you will want to build your <b>lib</b> directory first followed by
228your <b>tools</b> directory.</p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]229
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]230</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]231
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]232<!-- *********************************************************************** -->
233<div class="doc_section">
234 <a name="makefiles">Writing LLVM Style Makefiles</a>
235</div>
236<!-- *********************************************************************** -->
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]237
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]238<div class="doc_text">
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]239
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]240<p>The LLVM build system provides a convenient way to build libraries and
241executables. Most of your project Makefiles will only need to define a few
242variables. Below is a list of the variables one can set and what they can
243do:</p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]244
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]245</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]246
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]247<!-- ======================================================================= -->
248<div class="doc_subsection">
249 <a name="reqVars">Required Variables</a>
250</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]251
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]252<div class="doc_text">
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]253
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]254<dl>
255 <dt>LEVEL
256 <dd>
257 This variable is the relative path from this Makefile to the
258 top directory of your project's source code. For example, if
259 your source code is in <tt>/tmp/src</tt>, then the Makefile in
260 <tt>/tmp/src/jump/high</tt> would set <tt>LEVEL</tt> to <tt>"../.."</tt>.
261</dl>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]262
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]263</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]264
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]265<!-- ======================================================================= -->
266<div class="doc_subsection">
267 <a name="varsBuildDir">Variables for Building Subdirectories</a>
268</div>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]269
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]270<div class="doc_text">
John Criswell37c154a2003-10-17 21:50:38 +0000[diff] [blame]271
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]272<dl>
273 <dt>DIRS
274 <dd>
275 This is a space separated list of subdirectories that should be
276 built. They will be built, one at a time, in the order
277 specified.
278 <p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]279
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]280 <dt>PARALLEL_DIRS
281 <dd>
282 This is a list of directories that can be built in parallel.
283 These will be built after the directories in DIRS have been
284 built.
285 <p>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]286
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]287 <dt>OPTIONAL_DIRS
288 <dd>
289 This is a list of directories that can be built if they exist,
290 but will not cause an error if they do not exist. They are
291 built serially in the order in which they are listed.
292</dl>
John Criswellf2413ae2003-07-03 15:37:52 +0000[diff] [blame]293
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]294</div>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]295
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]296<!-- ======================================================================= -->
297<div class="doc_subsection">
298 <a name="varsBuildLib">Variables for Building Libraries</a>
299</div>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]300
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]301<div class="doc_text">
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]302
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]303<dl>
304 <dt>LIBRARYNAME
305 <dd>
306 This variable contains the base name of the library that will
307 be built. For example, to build a library named
308 <tt>libsample.a</tt>, LIBRARYNAME should be set to
309 <tt>sample</tt>.
310 <p>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]311
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]312 <dt>BUILD_ARCHIVE
313 <dd>
314 By default, a library is a <tt>.o</tt> file that is linked
315 directly into a program. To build an archive (also known as
316 a static library), set the BUILD_ARCHIVE variable.
317 <p>
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]318
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]319 <dt>SHARED_LIBRARY
320 <dd>
321 If SHARED_LIBRARY is defined in your Makefile, a shared
322 (or dynamic) library will be built.
323</dl>
324
325</div>
326
327<!-- ======================================================================= -->
328<div class="doc_subsection">
329 <a name="varsBuildProg">Variables for Building Programs</a>
330</div>
331
332<div class="doc_text">
333
334<dl>
335 <dt>TOOLNAME
336 <dd>
337 This variable contains the name of the program that will
338 be built. For example, to build an executable named
339 <tt>sample</tt>, TOOLNAME should be set to <tt>sample</tt>.
340 <p>
341
342 <dt>USEDLIBS
343 <dd>
344 This variable holds a space separated list of libraries that
345 should be linked into the program. These libraries must either
346 be LLVM libraries or libraries that come from your <b>lib</b>
347 directory. The libraries must be specified by their base name.
348 For example, to link libsample.a, you would set USEDLIBS to
349 <tt>sample</tt>.
350 <p>
351 Note that this works only for statically linked libraries.
352 <p>
353
354 <dt>LIBS
355 <dd>
356 To link dynamic libraries, add <tt>-l&lt;library base name&gt;</tt> to
357 the LIBS variable. The LLVM build system will look in the same places
358 for dynamic libraries as it does for static libraries.
359 <p>
360 For example, to link <tt>libsample.so</tt>, you would have the
361 following line in your <tt>Makefile</tt>:
362 <p>
363 <tt>
364 LIBS += -lsample
365 </tt>
366</dl>
367
368</div>
369
370<!-- ======================================================================= -->
371<div class="doc_subsection">
372 <a name="miscVars">Miscellaneous Variables</a>
373</div>
374
375<div class="doc_text">
376
377<dl>
378 <dt>ExtraSource
379 <dd>
380 This variable contains a space separated list of extra source
381 files that need to be built. It is useful for including the
382 output of Lex and Yacc programs.
383 <p>
384
385 <dt>CFLAGS
386 <dt>CPPFLAGS
387 <dd>
388 This variable can be used to add options to the C and C++
389 compiler, respectively. It is typically used to add options
390 that tell the compiler the location of additional directories
391 to search for header files.
392 <p>
393 It is highly suggested that you append to CFLAGS and CPPFLAGS as
394 opposed to overwriting them. The master Makefiles may already
395 have useful options in them that you may not want to overwrite.
396 <p>
397</dl>
398
399</div>
400
401<!-- *********************************************************************** -->
402<div class="doc_section">
403 <a name="objcode">Placement of Object Code</a>
404</div>
405<!-- *********************************************************************** -->
406
407<div class="doc_text">
408
409<p>The final location of built libraries and executables will depend upon
410whether you do a Debug, Release, or Profile build.</p>
411
412<dl>
413 <dt>Libraries
414 <dd>
415 All libraries (static and dynamic) will be stored in
Reid Spencerd967c802005-01-16 02:38:06 +0000[diff] [blame]416 <tt>PROJ_OBJ_ROOT/&lt;type&gt;/lib</tt>, where type is <tt>Debug</tt>,
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]417 <tt>Release</tt>, or <tt>Profile</tt> for a debug, optimized, or
418 profiled build, respectively.<p>
419
420 <dt>Executables
421 <dd>All executables will be stored in
Reid Spencerd967c802005-01-16 02:38:06 +0000[diff] [blame]422 <tt>PROJ_OBJ_ROOT/&lt;type&gt;/bin</tt>, where type is <tt>Debug</tt>,
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]423 <tt>Release</tt>, or <tt>Profile</tt> for a debug, optimized, or profiled
424 build, respectively.
425</dl>
426
427</div>
428
429<!-- *********************************************************************** -->
430<div class="doc_section">
431 <a name="help">Further Help</a>
432</div>
433<!-- *********************************************************************** -->
434
435<div class="doc_text">
436
437<p>If you have any questions or need any help creating an LLVM project,
438the LLVM team would be more than happy to help. You can always post your
439questions to the <a
440href="http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM Developers
441Mailing List</a>.</p>
442
443</div>
444
445<!-- *********************************************************************** -->
John Criswell7a4b96d2003-10-16 19:53:53 +0000[diff] [blame]446<hr>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]447<address>
448 <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
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Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]452
453 <a href="mailto:criswell@uiuc.edu">John Criswell</a><br>
Reid Spencer05fe4b02006-03-14 05:39:39 +0000[diff] [blame]454 <a href="http://llvm.org">The LLVM Compiler Infrastructure</a>
Misha Brukmanf6a04072004-05-12 20:57:43 +0000[diff] [blame]455 <br>
456 Last modified: $Date$
457</address>
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