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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / d051f7a13d8345ced6e409b3fe0313b9f865f1e0 / . / docs / CFEBuildInstrs.html
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4<head>
Misha Brukman6a2b3102004-05-12 18:49:47 +0000[diff] [blame]5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
6 <link rel="stylesheet" href="llvm.css" type="text/css" media="screen">
Chris Lattnerad85ba42007-02-14 07:42:12 +0000[diff] [blame]7 <title>Building the LLVM C/C++ Front-End</title>
Misha Brukman83bd33a2003-10-23 01:48:33 +0000[diff] [blame]8</head>
9<body>
Brian Gaeke46079d22003-10-21 21:58:38 +0000[diff] [blame]10
Misha Brukman83bd33a2003-10-23 01:48:33 +0000[diff] [blame]11<div class="doc_title">
Duncan Sandsd051f7a2008-02-12 21:22:58 +0000[diff] [blame^]12 Building the LLVM GCC Front-End
Misha Brukman83bd33a2003-10-23 01:48:33 +0000[diff] [blame]13</div>
Brian Gaeke46079d22003-10-21 21:58:38 +0000[diff] [blame]14
Brian Gaeke7af03e92003-11-12 20:47:30 +0000[diff] [blame]15<ol>
Duncan Sandsd051f7a2008-02-12 21:22:58 +0000[diff] [blame^]16 <li><a href="#instructions">Building llvm-gcc from Source</a></li>
Chris Lattner6a615ad2004-06-01 18:13:05 +0000[diff] [blame]17 <li><a href="#license">License Information</a></li>
Brian Gaeke7af03e92003-11-12 20:47:30 +0000[diff] [blame]18</ol>
19
Chris Lattner7911ce22004-05-23 21:07:27 +0000[diff] [blame]20<div class="doc_author">
Chris Lattnerad85ba42007-02-14 07:42:12 +0000[diff] [blame]21 <p>Written by the LLVM Team</p>
Brian Gaeke7af03e92003-11-12 20:47:30 +0000[diff] [blame]22</div>
23
24<!-- *********************************************************************** -->
25<div class="doc_section">
Duncan Sandsd051f7a2008-02-12 21:22:58 +0000[diff] [blame^]26 <a name="instructions">Building llvm-gcc from Source</a>
Misha Brukman83bd33a2003-10-23 01:48:33 +0000[diff] [blame]27</div>
28<!-- *********************************************************************** -->
29
30<div class="doc_text">
Chris Lattner810ad8c2006-07-11 20:47:00 +0000[diff] [blame]31
Duncan Sandsd051f7a2008-02-12 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
Chris Lattnerad85ba42007-02-14 07:42:12 +0000[diff] [blame]37the past.</p>
Chris Lattner810ad8c2006-07-11 20:47:00 +0000[diff] [blame]38
Brian Gaeke46079d22003-10-21 21:58:38 +0000[diff] [blame]39<ol>
Duncan Sandsd051f7a2008-02-12 21:22:58 +0000[diff] [blame^]40 <li><p>Retrieve the appropriate llvm-gcc4.x-y.z.source.tar.gz archive from the
Chris Lattnerad85ba42007-02-14 07:42:12 +0000[diff] [blame]41 <a href="http://llvm.org/releases/">llvm web site</a>.</p>
Jim Laskeye9493d32006-06-16 23:34:49 +0000[diff] [blame]42
Duncan Sandsd051f7a2008-02-12 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>
Jim Laskeye9493d32006-06-16 23:34:49 +0000[diff] [blame]46
Bill Wendling0ca558f2006-11-16 09:31:19 +0000[diff] [blame]47<div class="doc_code">
48<pre>
Bill Wendling0dafa8d2007-07-23 03:56:42 +0000[diff] [blame]49svn co http://llvm.org/svn/llvm-project/llvm-gcc-4.0/trunk <i>dst-directory</i>
Bill Wendling0ca558f2006-11-16 09:31:19 +0000[diff] [blame]50</pre>
51</div>
Jim Laskeye9493d32006-06-16 23:34:49 +0000[diff] [blame]52
Duncan Sandsd051f7a2008-02-12 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
Bill Wendling0ca558f2006-11-16 09:31:19 +0000[diff] [blame]61 <p>After that, the code can be be updated in the destination directory
62 using:</p>
Jim Laskeye9493d32006-06-16 23:34:49 +0000[diff] [blame]63
Bill Wendling0ca558f2006-11-16 09:31:19 +0000[diff] [blame]64<div class="doc_code">
65<pre>svn update</pre>
66</div>
Chris Lattner810ad8c2006-07-11 20:47:00 +0000[diff] [blame]67
Bill Wendling0ca558f2006-11-16 09:31:19 +0000[diff] [blame]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 Sandsd051f7a2008-02-12 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.
Chris Lattner810ad8c2006-07-11 20:47:00 +0000[diff] [blame]73</ol>
Bill Wendling0ca558f2006-11-16 09:31:19 +0000[diff] [blame]74
Chris Lattner810ad8c2006-07-11 20:47:00 +0000[diff] [blame]75</div>
Duncan Sandsd051f7a2008-02-12 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>
90 <li>The only platform for which the Ada front-end is known to build is
91 32 bit intel x86 running linux. It is unlikely to build for other
92 systems without some work.</li>
93 <li>The build requires having a compiler that supports Ada, C and C++.
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
102 which supports C++, see below.</li>
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>
109 <li>Download the <a href="http://llvm.org/releases/download.html">LLVM source</a>
110 and unpack it:
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
118 or <a href="http://llvm.org/docs/GettingStarted.html#checkout">check out the
119 latest version from subversion</a>:
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
126 <li>Download the
127 <a href="http://llvm.org/releases/download.html">llvm-gcc-4.2 source</a>
128 and unpack it:
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
136 or <a href="http://llvm.org/docs/GettingStarted.html#checkout">check out the
137 latest version from subversion</a>:
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
144 <li>Make a build directory <tt>llvm-objects</tt> for llvm and make it the
145 current directory:
146
147<div class="doc_code">
148<pre>mkdir llvm-objects
149cd llvm-objects</pre>
150</div>
151 </li>
152
153 <li>Configure LLVM (here it is configured to install into <tt>/usr/local</tt>):
154
155<div class="doc_code">
156<pre>../llvm/configure --prefix=/usr/local</pre>
157</div>
158
159 If you have a multi-compiler setup and the C++ compiler is not the
160 default, then you can configure like this:
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
167 <li>Build LLVM:
168
169<div class="doc_code">
170<pre>make</pre>
171</div>
172 </li>
173
174 <li>Install LLVM (optional):
175
176<div class="doc_code">
177<pre>make install</pre>
178</div>
179 </li>
180
181 <li>Make a build directory <tt>llvm-gcc-4.2-objects</tt> for llvm-gcc and make it the
182 current directory:
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
192 <li>Configure llvm-gcc (here it is configured to install into <tt>/usr/local</tt>).
193 Additional languages can be appended to the --enable-languages switch,
194 for example <tt>--enable-languages=ada,c,c++</tt>.
195
196<div class="doc_code">
197<pre>../llvm-gcc-4.2/configure --prefix=/usr/local --enable-languages=ada,c --enable-checking --enable-llvm=$PWD/../llvm-objects --disable-shared --disable-bootstrap --disable-multilib</pre>
198</div>
199
200 If you have a multi-compiler setup, then you can configure like this:
201<div class="doc_code">
202
203<pre>
204export CC=<b>PATH_TO_C_AND_ADA_COMPILER</b>
205export CXX=<b>PATH_TO_C++_COMPILER</b>
206../llvm-gcc-4.2/configure --prefix=/usr/local --enable-languages=ada,c --enable-checking --enable-llvm=$PWD/../llvm-objects --disable-shared --disable-bootstrap --disable-multilib</pre>
207</div>
208 </li>
209
210 <li>Build and install the compiler:
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
Brian Gaeke46079d22003-10-21 21:58:38 +0000[diff] [blame]239<!-- *********************************************************************** -->
John Criswelld000e1d2003-12-18 16:43:17 +0000[diff] [blame]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>
Chris Lattner810ad8c2006-07-11 20:47:00 +0000[diff] [blame]252More information is <a href="FAQ.html#license">available in the FAQ</a>.
John Criswelld000e1d2003-12-18 16:43:17 +0000[diff] [blame]253</p>
John Criswelld000e1d2003-12-18 16:43:17 +0000[diff] [blame]254</div>
255
256<!-- *********************************************************************** -->
Brian Gaeke46079d22003-10-21 21:58:38 +0000[diff] [blame]257
Misha Brukmanb9e57892003-10-28 21:09:29 +0000[diff] [blame]258<hr>
Misha Brukman6a2b3102004-05-12 18:49:47 +0000[diff] [blame]259<address>
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Reid Spencer05fe4b02006-03-14 05:39:39 +0000[diff] [blame]265 <a href="http://llvm.org">LLVM Compiler Infrastructure</a><br>
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Misha Brukman6a2b3102004-05-12 18:49:47 +0000[diff] [blame]267</address>
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