Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / llvm / b57e7488feebed4d91e99c254739343d12de2bf3 / . / docs / CFEBuildInstrs.html
blob: e3ade88c78732d276588c4bf28d56e98c254ddf6 [file] [log] [blame]
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
2 "http://www.w3.org/TR/html4/strict.dtd">
3<html>
4<head>
5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
6 <link rel="stylesheet" href="llvm.css" type="text/css" media="screen">
7 <title>Building the LLVM C/C++ Front-End</title>
8</head>
9<body>
10
11<div class="doc_title">
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]12 Building the LLVM GCC Front-End
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]13</div>
14
15<ol>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]16 <li><a href="#instructions">Building llvm-gcc from Source</a></li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]17 <li><a href="#license">License Information</a></li>
18</ol>
19
20<div class="doc_author">
21 <p>Written by the LLVM Team</p>
22</div>
23
24<!-- *********************************************************************** -->
25<div class="doc_section">
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]26 <a name="instructions">Building llvm-gcc from Source</a>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]27</div>
28<!-- *********************************************************************** -->
29
30<div class="doc_text">
31
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]32<p>This section describes how to acquire and build llvm-gcc 4.0 and 4.2, which are
33based on the GCC 4.0.1/4.2.1 front-ends respectively. Both front-ends support C,
34C++, Objective-C and Objective-C++. The 4.2 front-end also supports Ada and
35Fortran to some extent. Note that the instructions for building these front-ends
36are completely different (and much easier!) than those for building llvm-gcc3 in
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]37the past.</p>
38
39<ol>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]40 <li><p>Retrieve the appropriate llvm-gcc4.x-y.z.source.tar.gz archive from the
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]41 <a href="http://llvm.org/releases/">llvm web site</a>.</p>
42
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]43 <p>It is also possible to download the sources of the llvm-gcc front end
44 from a read-only mirror using subversion. To check out the 4.0 code
45 for first time use:</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]46
47<div class="doc_code">
48<pre>
Bill Wendling0f85c352007-07-23 03:56:42 +0000[diff] [blame]49svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.0/trunk <i>dst-directory</i>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]50</pre>
51</div>
52
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]53<p>To check out the 4.2 code use:</p>
54
55<div class="doc_code">
56<pre>
57svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.2/trunk <i>dst-directory</i>
58</pre>
59</div>
60
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]61 <p>After that, the code can be be updated in the destination directory
62 using:</p>
63
64<div class="doc_code">
65<pre>svn update</pre>
66</div>
67
68 <p>The mirror is brought up to date every evening.</p></li>
69
70 <li>Follow the directions in the top-level <tt>README.LLVM</tt> file for
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]71 up-to-date instructions on how to build llvm-gcc. See below for building
72 with support for Ada or Fortran.
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]73</ol>
74
75</div>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]76
77<!-- *********************************************************************** -->
78<div class="doc_section">
79 <a name="license">Building the Ada front-end</a>
80</div>
81
82<div class="doc_text">
83<p>Building with support for Ada amounts to following the directions in the
84top-level <tt>README.LLVM</tt> file, adding ",ada" to EXTRALANGS, for example:
85<tt>EXTRALANGS=,ada</tt></p>
86
87<p>There are some complications however:</p>
88
89<ol>
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]90 <li><p>The only platform for which the Ada front-end is known to build is
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]91 32 bit intel x86 running linux. It is unlikely to build for other
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]92 systems without some work.</p></li>
93 <li><p>The build requires having a compiler that supports Ada, C and C++.
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]94 The Ada front-end is written in Ada so an Ada compiler is needed to
95 build it. The LLVM parts of llvm-gcc are written in C++ so a C++
96 compiler is needed to build them. The rest of gcc is written in C.
97 Some linux distributions provide a version of gcc that supports all
98 three languages (the Ada part often comes as an add-on package to
99 the rest of gcc). Otherwise it is possible to combine two versions
100 of gcc, one that supports Ada and C (such as
101 <a href="http://libre.adacore.com/">GNAT GPL Edition</a>) and another
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]102 which supports C++, see below.</p></li>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]103</ol>
104
105<p>Supposing appropriate compilers are available, llvm-gcc with Ada support can
106 be built using the following recipe:</p>
107
108<ol>
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]109 <li><p>Download the <a href="http://llvm.org/releases/download.html">LLVM source</a>
110 and unpack it:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]111
112<div class="doc_code">
113<pre>wget http://llvm.org/releases/2.2/llvm-2.2.tar.gz
114tar xzf llvm-2.2.tar.gz
115mv llvm-2.2 llvm</pre>
116</div>
117
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]118 <p>or <a href="http://llvm.org/docs/GettingStarted.html#checkout">check out the
119 latest version from subversion</a>:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]120
121<div class="doc_code">
122<pre>svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm</pre>
123</div>
124 </li>
125
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]126 <li><p>Download the
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]127 <a href="http://llvm.org/releases/download.html">llvm-gcc-4.2 source</a>
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]128 and unpack it:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]129
130<div class="doc_code">
131<pre>wget http://llvm.org/releases/2.2/llvm-gcc4.2-2.2.source.tar.gz
132tar xzf llvm-gcc4.2-2.2.source.tar.gz
133mv llvm-gcc4.2-2.2.source llvm-gcc-4.2</pre>
134</div>
135
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]136 <p>or <a href="http://llvm.org/docs/GettingStarted.html#checkout">check out the
137 latest version from subversion</a>:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]138
139<div class="doc_code">
140<pre>svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.2/trunk llvm-gcc-4.2</pre>
141</div>
142 </li>
143
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]144 <li><p>Make a build directory <tt>llvm-objects</tt> for llvm and make it the
145 current directory:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]146
147<div class="doc_code">
148<pre>mkdir llvm-objects
149cd llvm-objects</pre>
150</div>
151 </li>
152
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]153 <li><p>Configure LLVM (here it is configured to install into <tt>/usr/local</tt>):</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]154
155<div class="doc_code">
156<pre>../llvm/configure --prefix=/usr/local</pre>
157</div>
158
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]159 <p>If you have a multi-compiler setup and the C++ compiler is not the
160 default, then you can configure like this:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]161
162<div class="doc_code">
163<pre>CXX=<b>PATH_TO_C++_COMPILER</b> ../llvm/configure --prefix=/usr/local</pre>
164</div>
165 </li>
166
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]167 <li><p>Build LLVM:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]168
169<div class="doc_code">
170<pre>make</pre>
171</div>
172 </li>
173
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]174 <li><p>Install LLVM (optional):</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]175
176<div class="doc_code">
177<pre>make install</pre>
178</div>
179 </li>
180
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]181 <li><p>Make a build directory <tt>llvm-gcc-4.2-objects</tt> for llvm-gcc and make it the
182 current directory:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]183
184<div class="doc_code">
185<pre>
186cd ..
187mkdir llvm-gcc-4.2-objects
188cd llvm-gcc-4.2-objects</pre>
189</div>
190 </li>
191
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]192 <li><p>Configure llvm-gcc (here it is configured to install into <tt>/usr/local</tt>).
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]193 Additional languages can be appended to the --enable-languages switch,
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]194 for example <tt>--enable-languages=ada,c,c++</tt>.</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]195
196<div class="doc_code">
197<pre>../llvm-gcc-4.2/configure --prefix=/usr/local --enable-languages=ada,c --enable-checking --enable-llvm=$PWD/../llvm-objects --disable-shared --disable-bootstrap --disable-multilib</pre>
198</div>
199
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]200 <p>If you have a multi-compiler setup, then you can configure like this:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]201<div class="doc_code">
202
203<pre>
204export CC=<b>PATH_TO_C_AND_ADA_COMPILER</b>
205export CXX=<b>PATH_TO_C++_COMPILER</b>
206../llvm-gcc-4.2/configure --prefix=/usr/local --enable-languages=ada,c --enable-checking --enable-llvm=$PWD/../llvm-objects --disable-shared --disable-bootstrap --disable-multilib</pre>
207</div>
208 </li>
209
Duncan Sandsb57e7482008-02-12 21:28:39 +0000[diff] [blame^]210 <li><p>Build and install the compiler:</p>
Duncan Sandsb4695da2008-02-12 21:22:58 +0000[diff] [blame]211
212<div class="doc_code">
213<pre>make
214make install</pre>
215</div>
216 </li>
217</ol>
218
219</div>
220
221<!-- *********************************************************************** -->
222<div class="doc_section">
223 <a name="license">Building the Fortran front-end</a>
224</div>
225
226<div class="doc_text">
227<p>
228To build with support for Fortran, follow the directions in the top-level
229<tt>README.LLVM</tt> file, adding ",fortran" to EXTRALANGS, for example:</p>
230
231<div class="doc_code">
232<pre>
233EXTRALANGS=,fortran
234</pre>
235</div>
236
237</div>
238
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]239<!-- *********************************************************************** -->
240<div class="doc_section">
241 <a name="license">License Information</a>
242</div>
243
244<div class="doc_text">
245<p>
246The LLVM GCC frontend is licensed to you under the GNU General Public License
247and the GNU Lesser General Public License. Please see the files COPYING and
248COPYING.LIB for more details.
249</p>
250
251<p>
252More information is <a href="FAQ.html#license">available in the FAQ</a>.
253</p>
254</div>
255
256<!-- *********************************************************************** -->
257
258<hr>
259<address>
260 <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
261 src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!"></a>
262 <a href="http://validator.w3.org/check/referer"><img
263 src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!"></a>
264
265 <a href="http://llvm.org">LLVM Compiler Infrastructure</a><br>
266 Last modified: $Date$
267</address>
268
269</body>
270</html>