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9
10<div class="doc_title">LLVM Makefile Guide</div>
11
12<ol>
13 <li><a href="#introduction">Introduction</a></li>
14 <li><a href="#general">General Concepts</a>
15 <ol>
16 <li><a href="#projects">Projects</a></li>
Reid Spencer2734bf72004-10-31 17:51:38 +000017 <li><a href="#varvals">Variable Values</a></li>
Reid Spencer0b166c42004-10-31 17:56:50 +000018 <li><a href="#including">Including Makefiles</a>
19 <ol>
20 <li><a href="#Makefile">Makefile</a></li>
21 <li><a href="#Makefile.common">Makefile.common</a></li>
22 <li><a href="#Makefile.config">Makefile.config</a></li>
23 <li><a href="#Makefile.rules">Makefile.rules</a></li>
24 </ol>
25 </li>
Reid Spencer504b21a2004-10-23 07:57:22 +000026 <li><a href="#Comments">Comments</a></li>
27 </ol>
28 </li>
Reid Spencer2734bf72004-10-31 17:51:38 +000029 <li><a href="#tutorial">Tutorial</a>
30 <ol>
Reid Spencerd8489c72004-12-06 05:35:25 +000031 <li><a href="#libraries">Libraries</a>
32 <ol>
Gabor Greif04367bf2007-07-06 22:07:22 +000033 <li><a href="#BCModules">Bitcode Modules</a></li>
Reid Spencer42fe4552006-08-07 23:12:15 +000034 <li><a href="#LoadableModules">Loadable Modules</a></li>
Reid Spencerd8489c72004-12-06 05:35:25 +000035 </ol>
36 </li>
Reid Spencer6f14a5b2004-11-29 07:47:16 +000037 <li><a href="#tools">Tools</a>
Reid Spencer31ce7fb2004-11-29 07:44:51 +000038 <ol>
39 <li><a href="#JIT">JIT Tools</a></li>
40 </ol>
Reid Spencer6f14a5b2004-11-29 07:47:16 +000041 </li>
Reid Spencercd7c1ca2005-01-16 07:18:31 +000042 <li><a href="#projects">Projects</a></li>
Reid Spencer2734bf72004-10-31 17:51:38 +000043 </ol>
44 </li>
Reid Spencer504b21a2004-10-23 07:57:22 +000045 <li><a href="#targets">Targets Supported</a>
46 <ol>
47 <li><a href="#all">all</a></li>
48 <li><a href="#all-local">all-local</a></li>
49 <li><a href="#check">check</a></li>
Reid Spencerd8489c72004-12-06 05:35:25 +000050 <li><a href="#check-local">check-local</a></li>
Reid Spencer504b21a2004-10-23 07:57:22 +000051 <li><a href="#clean">clean</a></li>
52 <li><a href="#clean-local">clean-local</a></li>
53 <li><a href="#dist">dist</a></li>
54 <li><a href="#dist-check">dist-check</a></li>
55 <li><a href="#dist-clean">dist-clean</a></li>
56 <li><a href="#install">install</a></li>
Reid Spencere1907862004-10-31 18:50:34 +000057 <li><a href="#preconditions">preconditions</a></li>
Reid Spencer714b52b2004-10-24 08:48:59 +000058 <li><a href="#printvars">printvars</a></li>
Reid Spencerf13a2692004-12-17 07:46:45 +000059 <li><a href="#reconfigure">reconfigure</a></li>
60 <li><a href="#spotless">spotless</a></li>
Reid Spencer504b21a2004-10-23 07:57:22 +000061 <li><a href="#tags">tags</a></li>
62 <li><a href="#uninstall">uninstall</a></li>
63 </ol>
64 </li>
65 <li><a href="#variables">Using Variables</a>
66 <ol>
67 <li><a href="#setvars">Control Variables</a></li>
68 <li><a href="#overvars">Override Variables</a></li>
69 <li><a href="#getvars">Readable Variables</a></li>
Reid Spencera79e58c2004-10-30 21:39:42 +000070 <li><a href="#intvars">Internal Variables</a></li>
Reid Spencer504b21a2004-10-23 07:57:22 +000071 </ol>
72 </li>
73</ol>
74
75<div class="doc_author">
76 <p>Written by <a href="mailto:reid@x10sys.com">Reid Spencer</a></p>
77</div>
78
79<!-- *********************************************************************** -->
80<div class="doc_section"><a name="introduction">Introduction </a></div>
81<!-- *********************************************************************** -->
82
83<div class="doc_text">
84 <p>This document provides <em>usage</em> information about the LLVM makefile
85 system. While loosely patterned after the BSD makefile system, LLVM has taken
Chris Lattner72f08912004-10-25 19:28:03 +000086 a departure from BSD in order to implement additional features needed by LLVM.
Reid Spencer2734bf72004-10-31 17:51:38 +000087 Although makefile systems such as automake were attempted at one point, it
88 has become clear that the features needed by LLVM and the Makefile norm are
89 too great to use a more limited tool. Consequently, LLVM requires simply GNU
90 Make 3.79, a widely portable makefile processor. LLVM unabashedly makes heavy
91 use of the features of GNU Make so the dependency on GNU Make is firm. If
92 you're not familiar with <tt>make</tt>, it is recommended that you read the
Reid Spencer6c8a2f12006-03-23 06:19:04 +000093 <a href="http://www.gnu.org/software/make/manual/make.html">GNU Makefile
94 Manual</a>.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +000095 <p>While this document is rightly part of the
96 <a href="ProgrammersManual.html">LLVM Programmer's Manual</a>, it is treated
97 separately here because of the volume of content and because it is often an
98 early source of bewilderment for new developers.</p>
99</div>
100
101<!-- *********************************************************************** -->
102<div class="doc_section"><a name="general">General Concepts</a></div>
103<!-- *********************************************************************** -->
104
105<div class="doc_text">
Reid Spencer2734bf72004-10-31 17:51:38 +0000106 <p>The LLVM Makefile System is the component of LLVM that is responsible for
107 building the software, testing it, generating distributions, checking those
108 distributions, installing and uninstalling, etc. It consists of a several
109 files throughout the source tree. These files and other general concepts are
110 described in this section.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000111</div>
112
113<!-- ======================================================================= -->
114<div class="doc_subsection"><a name="projects">Projects</a></div>
115<div class="doc_text">
116 <p>The LLVM Makefile System is quite generous. It not only builds its own
117 software, but it can build yours too. Built into the system is knowledge of
118 the <tt>llvm/projects</tt> directory. Any directory under <tt>projects</tt>
119 that has both a <tt>configure</tt> script and a <tt>Makefile</tt> is assumed
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000120 to be a project that uses the LLVM Makefile system. Building software that
121 uses LLVM does not require the LLVM Makefile System nor even placement in the
122 <tt>llvm/projects</tt> directory. However, doing so will allow your project
Reid Spencer504b21a2004-10-23 07:57:22 +0000123 to get up and running quickly by utilizing the built-in features that are used
Reid Spencer2734bf72004-10-31 17:51:38 +0000124 to compile LLVM. LLVM compiles itself using the same features of the makefile
125 system as used for projects.</p>
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000126 <p>For complete details on setting up your projects configuration, simply
127 mimic the <tt>llvm/projects/sample</tt> project or for further details,
128 consult the <a href="Projects.html">Projects.html</a> page.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000129</div>
130
131<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000132<div class="doc_subsection"><a name="varvalues">Variable Values</a></div>
133<div class="doc_text">
134 <p>To use the makefile system, you simply create a file named
135 <tt>Makefile</tt> in your directory and declare values for certain variables.
136 The variables and values that you select determine what the makefile system
137 will do. These variables enable rules and processing in the makefile system
138 that automatically Do The Right Thing&trade;.
139</div>
140
141<!-- ======================================================================= -->
142<div class="doc_subsection"><a name="including">Including Makefiles</a></div>
143<div class="doc_text">
144 <p>Setting variables alone is not enough. You must include into your Makefile
145 additional files that provide the rules of the LLVM Makefile system. The
146 various files involved are described in the sections that follow.</p>
147</div>
148
149<!-- ======================================================================= -->
150<div class="doc_subsubsection"><a name="Makefile">Makefile</a></div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000151<div class="doc_text">
152 <p>Each directory to participate in the build needs to have a file named
153 <tt>Makefile</tt>. This is the file first read by <tt>make</tt>. It has three
154 sections:</p>
155 <ol>
Misha Brukman3fecb442004-11-07 22:42:37 +0000156 <li><a href="#setvars">Settable Variables</a> - Required that must be set
Reid Spencer504b21a2004-10-23 07:57:22 +0000157 first.</li>
Misha Brukman3fecb442004-11-07 22:42:37 +0000158 <li><a href="#Makefile.common">include <tt>$(LEVEL)/Makefile.common</tt></a>
Reid Spencer504b21a2004-10-23 07:57:22 +0000159 - include the LLVM Makefile system.
Misha Brukman3fecb442004-11-07 22:42:37 +0000160 <li><a href="#overvars">Override Variables</a> - Override variables set by
Reid Spencer504b21a2004-10-23 07:57:22 +0000161 the LLVM Makefile system.
162 </ol>
163</div>
164
165<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000166<div class="doc_subsubsection"><a name="Makefile.common">Makefile.common</a>
167</div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000168<div class="doc_text">
169 <p>Every project must have a <tt>Makefile.common</tt> file at its top source
170 directory. This file serves three purposes:</p>
171 <ol>
172 <li>It includes the project's configuration makefile to obtain values
173 determined by the <tt>configure</tt> script. This is done by including the
Misha Brukman3fecb442004-11-07 22:42:37 +0000174 <a href="#Makefile.config"><tt>$(LEVEL)/Makefile.config</tt></a> file.</li>
Reid Spencer504b21a2004-10-23 07:57:22 +0000175 <li>It specifies any other (static) values that are needed throughout the
176 project. Only values that are used in all or a large proportion of the
177 project's directories should be placed here.</li>
Reid Spencer2734bf72004-10-31 17:51:38 +0000178 <li>It includes the standard rules for the LLVM Makefile system,
Misha Brukman3fecb442004-11-07 22:42:37 +0000179 <a href="#Makefile.rules"><tt>$(LLVM_SRC_ROOT)/Makefile.rules</tt></a>.
Reid Spencer504b21a2004-10-23 07:57:22 +0000180 This file is the "guts" of the LLVM Makefile system.</li>
181 </ol>
182</div>
183
184<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000185<div class="doc_subsubsection"><a name="Makefile.config">Makefile.config</a>
186</div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000187<div class="doc_text">
188 <p>Every project must have a <tt>Makefile.config</tt> at the top of its
189 <em>build</em> directory. This file is <b>generated</b> by the
190 <tt>configure</tt> script from the pattern provided by the
191 <tt>Makefile.config.in</tt> file located at the top of the project's
192 <em>source</em> directory. The contents of this file depend largely on what
193 configuration items the project uses, however most projects can get what they
194 need by just relying on LLVM's configuration found in
195 <tt>$(LLVM_OBJ_ROOT)/Makefile.config</tt>.
196</div>
197
198<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000199<div class="doc_subsubsection"><a name="Makefile.rules">Makefile.rules</a></div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000200<div class="doc_text">
201 <p>This file, located at <tt>$(LLVM_SRC_ROOT)/Makefile.rules</tt> is the heart
202 of the LLVM Makefile System. It provides all the logic, dependencies, and
203 rules for building the targets supported by the system. What it does largely
Misha Brukman3fecb442004-11-07 22:42:37 +0000204 depends on the values of <tt>make</tt> <a href="#variables">variables</a> that
Reid Spencer504b21a2004-10-23 07:57:22 +0000205 have been set <em>before</em> <tt>Makefile.rules</tt> is included.
206</div>
207
208<!-- ======================================================================= -->
209<div class="doc_subsection"><a name="Comments">Comments</a></div>
210<div class="doc_text">
211 <p>User Makefiles need not have comments in them unless the construction is
Reid Spencerd8489c72004-12-06 05:35:25 +0000212 unusual or it does not strictly follow the rules and patterns of the LLVM
Reid Spencer504b21a2004-10-23 07:57:22 +0000213 makefile system. Makefile comments are invoked with the pound (#) character.
214 The # character and any text following it, to the end of the line, are ignored
215 by <tt>make</tt>.</p>
216</div>
217
218<!-- *********************************************************************** -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000219<div class="doc_section"><a name="tutorial">Tutorial</a></div>
220<!-- *********************************************************************** -->
221<div class="doc_text">
222 <p>This section provides some examples of the different kinds of modules you
223 can build with the LLVM makefile system. In general, each directory you
224 provide will build a single object although that object may be composed of
225 additionally compiled components.</p>
226</div>
227
228<!-- ======================================================================= -->
229<div class="doc_subsection"><a name="libraries">Libraries</a></div>
230<div class="doc_text">
231 <p>Only a few variable definitions are needed to build a regular library.
232 Normally, the makefile system will build all the software into a single
233 <tt>libname.o</tt> (pre-linked) object. This means the library is not
234 searchable and that the distinction between compilation units has been
Chris Lattner6be92662009-06-16 23:00:42 +0000235 dissolved. Optionally, you can ask for a shared library (.so) or archive
236 library (.a) built. Archive libraries are the default. For example:</p>
Reid Spencer2734bf72004-10-31 17:51:38 +0000237 <pre><tt>
238 LIBRARYNAME = mylib
239 SHARED_LIBRARY = 1
240 ARCHIVE_LIBRARY = 1
Reid Spencer2734bf72004-10-31 17:51:38 +0000241 </tt></pre>
242 <p>says to build a library named "mylib" with both a shared library
Chris Lattner6be92662009-06-16 23:00:42 +0000243 (<tt>mylib.so</tt>) and an archive library (<tt>mylib.a</tt>) version. The
244 contents of all the
Reid Spencer2734bf72004-10-31 17:51:38 +0000245 libraries produced will be the same, they are just constructed differently.
246 Note that you normally do not need to specify the sources involved. The LLVM
247 Makefile system will infer the source files from the contents of the source
248 directory.</p>
Reid Spencer7c7e9aa2005-01-11 05:12:54 +0000249 <p>The <tt>LOADABLE_MODULE=1</tt> directive can be used in conjunction with
250 <tt>SHARED_LIBRARY=1</tt> to indicate that the resulting shared library should
251 be openable with the <tt>dlopen</tt> function and searchable with the
252 <tt>dlsym</tt> function (or your operating system's equivalents). While this
253 isn't strictly necessary on Linux and a few other platforms, it is required
254 on systems like HP-UX and Darwin. You should use <tt>LOADABLE_MODULE</tt> for
255 any shared library that you intend to be loaded into an tool via the
256 <tt>-load</tt> option. See the
257 <a href="WritingAnLLVMPass.html#makefile">WritingAnLLVMPass.html</a> document
258 for an example of why you might want to do this.
Reid Spencer2734bf72004-10-31 17:51:38 +0000259</div>
260
261<!-- ======================================================================= -->
Gabor Greif04367bf2007-07-06 22:07:22 +0000262<div class="doc_subsubsection"><a name="BCModules">Bitcode Modules</a></div>
Reid Spencerd8489c72004-12-06 05:35:25 +0000263<div class="doc_text">
Benjamin Kramer8040cd32009-10-12 14:46:08 +0000264 <p>In some situations, it is desirable to build a single bitcode module from
Gabor Greif04367bf2007-07-06 22:07:22 +0000265 a variety of sources, instead of an archive, shared library, or bitcode
266 library. Bitcode modules can be specified in addition to any of the other
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000267 types of libraries by defining the <a href="#MODULE_NAME">MODULE_NAME</a>
Reid Spencerd8489c72004-12-06 05:35:25 +0000268 variable. For example:</p>
269 <pre><tt>
270 LIBRARYNAME = mylib
271 BYTECODE_LIBRARY = 1
272 MODULE_NAME = mymod
273 </tt></pre>
274 <p>will build a module named <tt>mymod.bc</tt> from the sources in the
Gabor Greif04367bf2007-07-06 22:07:22 +0000275 directory. This module will be an aggregation of all the bitcode modules
276 derived from the sources. The example will also build a bitcode archive
277 containing a bitcode module for each compiled source file. The difference is
Reid Spencerd8489c72004-12-06 05:35:25 +0000278 subtle, but important depending on how the module or library is to be linked.
279 </p>
280</div>
281
282<!-- ======================================================================= -->
Reid Spencer42fe4552006-08-07 23:12:15 +0000283<div class="doc_subsubsection">
Reid Spencerd1001f22006-08-07 23:44:59 +0000284 <a name="LoadableModules">Loadable Modules</a>
Reid Spencer42fe4552006-08-07 23:12:15 +0000285</div>
286<div class="doc_text">
287 <p>In some situations, you need to create a loadable module. Loadable modules
288 can be loaded into programs like <tt>opt</tt> or <tt>llc</tt> to specify
289 additional passes to run or targets to support. Loadable modules are also
290 useful for debugging a pass or providing a pass with another package if that
291 pass can't be included in LLVM.</p>
292 <p>LLVM provides complete support for building such a module. All you need to
293 do is use the LOADABLE_MODULE variable in your Makefile. For example, to
294 build a loadable module named <tt>MyMod</tt> that uses the LLVM libraries
295 <tt>LLVMSupport.a</tt> and <tt>LLVMSystem.a</tt>, you would specify:</p>
296 <pre><tt>
297 LIBRARYNAME := MyMod
298 LOADABLE_MODULE := 1
Chris Lattner362b3682006-09-04 06:12:14 +0000299 LINK_COMPONENTS := support system
Reid Spencer42fe4552006-08-07 23:12:15 +0000300 </tt></pre>
301 <p>Use of the <tt>LOADABLE_MODULE</tt> facility implies several things:</p>
302 <ol>
303 <li>There will be no "lib" prefix on the module. This differentiates it from
304 a standard shared library of the same name.</li>
305 <li>The <a href="#SHARED_LIBRARY">SHARED_LIBRARY</a> variable is turned
306 on.</li>
307 <li>The <a href="#LINK_LIBS_IN_SHARED">LINK_LIBS_IN_SHARED</a> variable
308 is turned on.</li>
Reid Spencer42fe4552006-08-07 23:12:15 +0000309 </ol>
310 <p>A loadable module is loaded by LLVM via the facilities of libtool's libltdl
311 library which is part of <tt>lib/System</tt> implementation.</p>
312</div>
313
314<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000315<div class="doc_subsection"><a name="tools">Tools</a></div>
316<div class="doc_text">
317 <p>For building executable programs (tools), you must provide the name of the
318 tool and the names of the libraries you wish to link with the tool. For
319 example:</p>
320 <pre><tt>
321 TOOLNAME = mytool
322 USEDLIBS = mylib
Chris Lattner362b3682006-09-04 06:12:14 +0000323 LINK_COMPONENTS = support system
Reid Spencer2734bf72004-10-31 17:51:38 +0000324 </tt></pre>
325 <p>says that we are to build a tool name <tt>mytool</tt> and that it requires
326 three libraries: <tt>mylib</tt>, <tt>LLVMSupport.a</tt> and
327 <tt>LLVMSystem.a</tt>.</p>
328 <p>Note that two different variables are use to indicate which libraries are
329 linked: <tt>USEDLIBS</tt> and <tt>LLVMLIBS</tt>. This distinction is necessary
330 to support projects. <tt>LLVMLIBS</tt> refers to the LLVM libraries found in
331 the LLVM object directory. <tt>USEDLIBS</tt> refers to the libraries built by
332 your project. In the case of building LLVM tools, <tt>USEDLIBS</tt> and
333 <tt>LLVMLIBS</tt> can be used interchangeably since the "project" is LLVM
334 itself and <tt>USEDLIBS</tt> refers to the same place as <tt>LLVMLIBS</tt>.
335 </p>
336 <p>Also note that there are two different ways of specifying a library: with a
337 <tt>.a</tt> suffix and without. Without the suffix, the entry refers to the
338 re-linked (.o) file which will include <em>all</em> symbols of the library.
339 This is useful, for example, to include all passes from a library of passes.
340 If the <tt>.a</tt> suffix is used then the library is linked as a searchable
341 library (with the <tt>-l</tt> option). In this case, only the symbols that are
342 unresolved <em>at that point</em> will be resolved from the library, if they
343 exist. Other (unreferenced) symbols will not be included when the <tt>.a</tt>
344 syntax is used. Note that in order to use the <tt>.a</tt> suffix, the library
345 in question must have been built with the <tt>ARCHIVE_LIBRARY</tt> option set.
346 </p>
347</div>
348
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000349<!-- ======================================================================= -->
350<div class="doc_subsubsection"><a name="JIT">JIT Tools</a></div>
351<div class="doc_text">
Chris Lattner362b3682006-09-04 06:12:14 +0000352 <p>Many tools will want to use the JIT features of LLVM. To do this, you
353 simply specify that you want an execution 'engine', and the makefiles will
354 automatically link in the appropriate JIT for the host or an interpreter
355 if none is available:</p>
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000356 <pre><tt>
357 TOOLNAME = my_jit_tool
358 USEDLIBS = mylib
Chris Lattner362b3682006-09-04 06:12:14 +0000359 LINK_COMPONENTS = engine
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000360 </tt></pre>
Chris Lattner362b3682006-09-04 06:12:14 +0000361 <p>Of course, any additional libraries may be listed as other components. To
362 get a full understanding of how this changes the linker command, it is
363 recommended that you:</p>
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000364 <pre><tt>
365 cd examples/Fibonacci
366 make VERBOSE=1
367 </tt></pre>
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000368</div>
369
Reid Spencer2734bf72004-10-31 17:51:38 +0000370<!-- *********************************************************************** -->
Reid Spencer504b21a2004-10-23 07:57:22 +0000371<div class="doc_section"><a name="targets">Targets Supported</a></div>
372<!-- *********************************************************************** -->
373
374<div class="doc_text">
375 <p>This section describes each of the targets that can be built using the LLVM
376 Makefile system. Any target can be invoked from any directory but not all are
Reid Spencerd8489c72004-12-06 05:35:25 +0000377 applicable to a given directory (e.g. "check", "dist" and "install" will
Chris Lattnerff52f9c2004-12-04 00:04:48 +0000378 always operate as if invoked from the top level directory).</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000379
380 <table style="text-align:left">
Reid Spencerd8489c72004-12-06 05:35:25 +0000381 <tr>
382 <th>Target Name</th><th>Implied Targets</th><th>Target Description</th>
383 </tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000384 <tr><td><a href="#all"><tt>all</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000385 <td>Compile the software recursively. Default target.
386 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000387 <tr><td><a href="#all-local"><tt>all-local</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000388 <td>Compile the software in the local directory only.
389 </td></tr>
Chris Lattnerff52f9c2004-12-04 00:04:48 +0000390 <tr><td><a href="#check"><tt>check</tt></a></td><td></td>
Reid Spencerd8489c72004-12-06 05:35:25 +0000391 <td>Change to the <tt>test</tt> directory in a project and run the
392 test suite there.
393 </td></tr>
394 <tr><td><a href="#check-local"><tt>check-local</tt></a></td><td></td>
395 <td>Run a local test suite. Generally this is only defined in the
396 <tt>Makefile</tt> of the project's <tt>test</tt> directory.
Reid Spencer504b21a2004-10-23 07:57:22 +0000397 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000398 <tr><td><a href="#clean"><tt>clean</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000399 <td>Remove built objects recursively.
400 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000401 <tr><td><a href="#clean-local"><tt>clean-local</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000402 <td>Remove built objects from the local directory only.
403 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000404 <tr><td><a href="#dist"><tt>dist</tt></a></td><td>all</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000405 <td>Prepare a source distribution tarball.
406 </td></tr>
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000407 <tr><td><a href="#dist-check"><tt>dist-check</tt></a></td><td>all</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000408 <td>Prepare a source distribution tarball and check that it builds.
409 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000410 <tr><td><a href="#dist-clean"><tt>dist-clean</tt></a></td><td>clean</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000411 <td>Clean source distribution tarball temporary files.
412 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000413 <tr><td><a href="#install"><tt>install</tt></a></td><td>all</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000414 <td>Copy built objects to installation directory.
415 </td></tr>
Reid Spencere1907862004-10-31 18:50:34 +0000416 <tr><td><a href="#preconditions"><tt>preconditions</tt></a></td><td>all</td>
417 <td>Check to make sure configuration and makefiles are up to date.
418 </td></tr>
Reid Spencera79e58c2004-10-30 21:39:42 +0000419 <tr><td><a href="#printvars"><tt>printvars</tt></a></td><td>all</td>
420 <td>Prints variables defined by the makefile system (for debugging).
421 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000422 <tr><td><a href="#tags"><tt>tags</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000423 <td>Make C and C++ tags files for emacs and vi.
424 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000425 <tr><td><a href="#uninstall"><tt>uninstall</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000426 <td>Remove built objects from installation directory.
427 </td></tr>
428 </table>
429</div>
430
431<!-- ======================================================================= -->
432<div class="doc_subsection"><a name="all">all (default)</a></div>
433<div class="doc_text">
434 <p>When you invoke <tt>make</tt> with no arguments, you are implicitly
435 instructing it to seek the "all" target (goal). This target is used for
Reid Spencer714b52b2004-10-24 08:48:59 +0000436 building the software recursively and will do different things in different
437 directories. For example, in a <tt>lib</tt> directory, the "all" target will
438 compile source files and generate libraries. But, in a <tt>tools</tt>
439 directory, it will link libraries and generate executables.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000440</div>
441
442<!-- ======================================================================= -->
443<div class="doc_subsection"><a name="all-local">all-local</a></div>
444<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000445 <p>This target is the same as <a href="#all">all</a> but it operates only on
446 the current directory instead of recursively.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000447</div>
448
449<!-- ======================================================================= -->
Reid Spencerd8489c72004-12-06 05:35:25 +0000450<div class="doc_subsection"><a name="check">check</a></div>
451<div class="doc_text">
452 <p>This target can be invoked from anywhere within a project's directories
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000453 but always invokes the <a href="#check-local"><tt>check-local</tt></a> target
Reid Spencerd8489c72004-12-06 05:35:25 +0000454 in the project's <tt>test</tt> directory, if it exists and has a
455 <tt>Makefile</tt>. A warning is produced otherwise. If
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000456 <a href="#TESTSUITE"><tt>TESTSUITE</tt></a> is defined on the <tt>make</tt>
Reid Spencerd8489c72004-12-06 05:35:25 +0000457 command line, it will be passed down to the invocation of
458 <tt>make check-local</tt> in the <tt>test</tt> directory. The intended usage
459 for this is to assist in running specific suites of tests. If
460 <tt>TESTSUITE</tt> is not set, the implementation of <tt>check-local</tt>
461 should run all normal tests. It is up to the project to define what
462 different values for <tt>TESTSUTE</tt> will do. See the
463 <a href="TestingGuide.html">TestingGuide</a> for further details.</p>
464</div>
465
466<!-- ======================================================================= -->
467<div class="doc_subsection"><a name="check-local">check-local</a></div>
468<div class="doc_text">
469 <p>This target should be implemented by the <tt>Makefile</tt> in the project's
470 <tt>test</tt> directory. It is invoked by the <tt>check</tt> target elsewhere.
471 Each project is free to define the actions of <tt>check-local</tt> as
472 appropriate for that project. The LLVM project itself uses dejagnu to run a
473 suite of feature and regresson tests. Other projects may choose to use
474 dejagnu or any other testing mechanism.</p>
475</div>
476
477<!-- ======================================================================= -->
Reid Spencer504b21a2004-10-23 07:57:22 +0000478<div class="doc_subsection"><a name="clean">clean</a></div>
479<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000480 <p>This target cleans the build directory, recursively removing all things
Reid Spencerd8489c72004-12-06 05:35:25 +0000481 that the Makefile builds. The cleaning rules have been made guarded so they
482 shouldn't go awry (via <tt>rm -f $(UNSET_VARIABLE)/*</tt> which will attempt
483 to erase the entire directory structure.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000484</div>
485
486<!-- ======================================================================= -->
487<div class="doc_subsection"><a name="clean-local">clean-local</a></div>
488<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000489 <p>This target does the same thing as <tt>clean</tt> but only for the current
490 (local) directory.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000491</div>
492
493<!-- ======================================================================= -->
494<div class="doc_subsection"><a name="dist">dist</a></div>
495<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000496 <p>This target builds a distribution tarball. It first builds the entire
497 project using the <tt>all</tt> target and then tars up the necessary files and
498 compresses it. The generated tarball is sufficient for a casual source
499 distribution, but probably not for a release (see <tt>dist-check</tt>).</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000500</div>
501
502<!-- ======================================================================= -->
503<div class="doc_subsection"><a name="dist-check">dist-check</a></div>
504<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000505 <p>This target does the same thing as the <tt>dist</tt> target but also checks
506 the distribution tarball. The check is made by unpacking the tarball to a new
507 directory, configuring it, building it, installing it, and then verifying that
508 the installation results are correct (by comparing to the original build).
509 This target can take a long time to run but should be done before a release
510 goes out to make sure that the distributed tarball can actually be built into
511 a working release.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000512</div>
513
514<!-- ======================================================================= -->
515<div class="doc_subsection"><a name="dist-clean">dist-clean</a></div>
516<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000517 <p>This is a special form of the <tt>clean</tt> clean target. It performs a
518 normal <tt>clean</tt> but also removes things pertaining to building the
519 distribution.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000520</div>
521
522<!-- ======================================================================= -->
523<div class="doc_subsection"><a name="install">install</a></div>
524<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000525 <p>This target finalizes shared objects and executables and copies all
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000526 libraries, headers, executables and documentation to the directory given
527 with the <tt>--prefix</tt> option to <tt>configure</tt>. When completed,
528 the prefix directory will have everything needed to <b>use</b> LLVM. </p>
529 <p>The LLVM makefiles can generate complete <b>internal</b> documentation
530 for all the classes by using <tt>doxygen</tt>. By default, this feature is
531 <b>not</b> enabled because it takes a long time and generates a massive
532 amount of data (>100MB). If you want this feature, you must configure LLVM
533 with the --enable-doxygen switch and ensure that a modern version of doxygen
534 (1.3.7 or later) is available in your <tt>PATH</tt>. You can download
535 doxygen from
536 <a href="http://www.stack.nl/~dimitri/doxygen/download.html#latestsrc">
537 here</a>.
Reid Spencer504b21a2004-10-23 07:57:22 +0000538</div>
Reid Spencer714b52b2004-10-24 08:48:59 +0000539
540<!-- ======================================================================= -->
Reid Spencere1907862004-10-31 18:50:34 +0000541<div class="doc_subsection"><a name="preconditions">preconditions</a></div>
542<div class="doc_text">
543 <p>This utility target checks to see if the <tt>Makefile</tt> in the object
544 directory is older than the <tt>Makefile</tt> in the source directory and
545 copies it if so. It also reruns the <tt>configure</tt> script if that needs to
546 be done and rebuilds the <tt>Makefile.config</tt> file similarly. Users may
547 overload this target to ensure that sanity checks are run <em>before</em> any
548 building of targets as all the targets depend on <tt>preconditions</tt>.</p>
549</div>
550
551<!-- ======================================================================= -->
Reid Spencer714b52b2004-10-24 08:48:59 +0000552<div class="doc_subsection"><a name="printvars">printvars</a></div>
553<div class="doc_text">
Reid Spencerd8489c72004-12-06 05:35:25 +0000554 <p>This utility target just causes the LLVM makefiles to print out some of
555 the makefile variables so that you can double check how things are set. </p>
Reid Spencer714b52b2004-10-24 08:48:59 +0000556</div>
557
Reid Spencer504b21a2004-10-23 07:57:22 +0000558<!-- ======================================================================= -->
Reid Spencerf13a2692004-12-17 07:46:45 +0000559<div class="doc_subsection"><a name="reconfigure">reconfigure</a></div>
560<div class="doc_text">
561 <p>This utility target will force a reconfigure of LLVM or your project. It
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000562 simply runs <tt>$(PROJ_OBJ_ROOT)/config.status --recheck</tt> to rerun the
Reid Spencerf13a2692004-12-17 07:46:45 +0000563 configuration tests and rebuild the configured files. This isn't generally
564 useful as the makefiles will reconfigure themselves whenever its necessary.
565 </p>
566</div>
567
568<!-- ======================================================================= -->
569<div class="doc_subsection"><a name="spotless">spotless</a></div>
570<div class="doc_text">
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000571 <p>This utility target, only available when <tt>$(PROJ_OBJ_ROOT)</tt> is not
572 the same as <tt>$(PROJ_SRC_ROOT)</tt>, will completely clean the
John Criswellcb9b4f92005-10-24 16:47:40 +0000573 <tt>$(PROJ_OBJ_ROOT)</tt> directory by removing its content entirely and
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000574 reconfiguring the directory. This returns the <tt>$(PROJ_OBJ_ROOT)</tt>
Reid Spencerf13a2692004-12-17 07:46:45 +0000575 directory to a completely fresh state. All content in the directory except
Reid Spencer7c7e9aa2005-01-11 05:12:54 +0000576 configured files and top-level makefiles will be lost.</p>
577 <div class="doc_warning"><p>Use with caution.</p></div>
Reid Spencerf13a2692004-12-17 07:46:45 +0000578</div>
579
580<!-- ======================================================================= -->
Reid Spencer504b21a2004-10-23 07:57:22 +0000581<div class="doc_subsection"><a name="tags">tags</a></div>
582<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000583 <p>This target will generate a <tt>TAGS</tt> file in the top-level source
584 directory. It is meant for use with emacs, XEmacs, or ViM. The TAGS file
585 provides an index of symbol definitions so that the editor can jump you to the
586 definition quickly. </p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000587</div>
588
589<!-- ======================================================================= -->
590<div class="doc_subsection"><a name="uninstall">uninstall</a></div>
591<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000592 <p>This target is the opposite of the <tt>install</tt> target. It removes the
593 header, library and executable files from the installation directories. Note
Chris Lattner72f08912004-10-25 19:28:03 +0000594 that the directories themselves are not removed because it is not guaranteed
Reid Spencer714b52b2004-10-24 08:48:59 +0000595 that LLVM is the only thing installing there (e.g. --prefix=/usr).</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000596</div>
597
598<!-- *********************************************************************** -->
599<div class="doc_section"><a name="variables">Variables</a></div>
600<!-- *********************************************************************** -->
601<div class="doc_text">
602 <p>Variables are used to tell the LLVM Makefile System what to do and to
Reid Spencera79e58c2004-10-30 21:39:42 +0000603 obtain information from it. Variables are also used internally by the LLVM
604 Makefile System. Variable names that contain only the upper case alphabetic
605 letters and underscore are intended for use by the end user. All other
606 variables are internal to the LLVM Makefile System and should not be relied
607 upon nor modified. The sections below describe how to use the LLVM Makefile
Reid Spencer504b21a2004-10-23 07:57:22 +0000608 variables.</p>
609</div>
610
611<!-- ======================================================================= -->
612<div class="doc_subsection"><a name="setvars">Control Variables</a></div>
613<div class="doc_text">
614 <p>Variables listed in the table below should be set <em>before</em> the
Misha Brukman3fecb442004-11-07 22:42:37 +0000615 inclusion of <a href="#Makefile.common"><tt>$(LEVEL)/Makefile.common</tt></a>.
Reid Spencer504b21a2004-10-23 07:57:22 +0000616 These variables provide input to the LLVM make system that tell it what to do
617 for the current directory.</p>
Reid Spencera79e58c2004-10-30 21:39:42 +0000618 <dl>
619 <dt><a name="BUILD_ARCHIVE"><tt>BUILD_ARCHIVE</tt></a></dt>
620 <dd>If set to any value, causes an archive (.a) library to be built.</dd>
621 <dt><a name="BUILT_SOURCES"><tt>BUILT_SOURCES</tt></a></dt>
622 <dd>Specifies a set of source files that are generated from other source
623 files. These sources will be built before any other target processing to
Reid Spencer0b166c42004-10-31 17:56:50 +0000624 ensure they are present.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000625 <dt><a name="BYTECODE_LIBRARY"><tt>BYTECODE_LIBRARY</tt></a></dt>
Gabor Greif04367bf2007-07-06 22:07:22 +0000626 <dd>If set to any value, causes a bitcode library (.bc) to be built.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000627 <dt><a name="CONFIG_FILES"><tt>CONFIG_FILES</tt></a></dt>
628 <dd>Specifies a set of configuration files to be installed.</dd>
Jeffrey Yasskinda591e72009-09-28 21:14:38 +0000629 <dt><a name="DEBUG_SYMBOLS"><tt>DEBUG_SYMBOLS</tt></a></dt>
Jeffrey Yasskind4482922009-09-25 16:46:09 +0000630 <dd>If set to any value, causes the build to include debugging
631 symbols even in optimized objects, libraries and executables. This
632 alters the flags specified to the compilers and linkers. Debugging
633 isn't fun in an optimized build, but it is possible.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000634 <dt><a name="DIRS"><tt>DIRS</tt></a></dt>
635 <dd>Specifies a set of directories, usually children of the current
636 directory, that should also be made using the same goal. These directories
637 will be built serially.</dd>
638 <dt><a name="DISABLE_AUTO_DEPENDENCIES"><tt>DISABLE_AUTO_DEPENDENCIES</tt></a></dt>
639 <dd>If set to any value, causes the makefiles to <b>not</b> automatically
640 generate dependencies when running the compiler. Use of this feature is
641 discouraged and it may be removed at a later date.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000642 <dt><a name="ENABLE_OPTIMIZED"><tt>ENABLE_OPTIMIZED</tt></a></dt>
643 <dd>If set to any value, causes the build to generate optimized objects,
644 libraries and executables. This alters the flags specified to the compilers
645 and linkers. Generally debugging won't be a fun experience with an optimized
646 build.</dd>
647 <dt><a name="ENABLE_PROFILING"><tt>ENABLE_PROFILING</tt></a></dt>
648 <dd>If set to any value, causes the build to generate both optimized and
649 profiled objects, libraries and executables. This alters the flags specified
650 to the compilers and linkers to ensure that profile data can be collected
651 from the tools built. Use the <tt>gprof</tt> tool to analyze the output from
652 the profiled tools (<tt>gmon.out</tt>).</dd>
Reid Spencer004ba032006-04-09 23:45:38 +0000653 <dt><a name="DISABLE_ASSERTIONS"><tt>DISABLE_ASSERTIONS</tt></a></dt>
654 <dd>If set to any value, causes the build to disable assertions, even if
655 building a release or profile build. This will exclude all assertion check
656 code from the build. LLVM will execute faster, but with little help when
657 things go wrong.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000658 <dt><a name="EXPERIMENTAL_DIRS"><tt>EXPERIMENTAL_DIRS</tt></a></dt>
659 <dd>Specify a set of directories that should be built, but if they fail, it
660 should not cause the build to fail. Note that this should only be used
661 temporarily while code is being written.</dd>
662 <dt><a name="EXPORTED_SYMBOL_FILE"><tt>EXPORTED_SYMBOL_FILE</tt></a></dt>
663 <dd>Specifies the name of a single file that contains a list of the
664 symbols to be exported by the linker. One symbol per line.</dd>
665 <dt><a name="EXPORTED_SYMBOL_LIST"><tt>EXPORTED_SYMBOL_LIST</tt></a></dt>
666 <dd>Specifies a set of symbols to be exported by the linker.</dd>
667 <dt><a name="EXTRA_DIST"><tt>EXTRA_DIST</tt></a></dt>
668 <dd>Specifies additional files that should be distributed with LLVM. All
Reid Spencer6c8a2f12006-03-23 06:19:04 +0000669 source files, all built sources, all Makefiles, and most documentation files
Reid Spencera79e58c2004-10-30 21:39:42 +0000670 will be automatically distributed. Use this variable to distribute any
671 files that are not automatically distributed.</dd>
672 <dt><a name="KEEP_SYMBOLS"><tt>KEEP_SYMBOLS</tt></a></dt>
673 <dd>If set to any value, specifies that when linking executables the
674 makefiles should retain debug symbols in the executable. Normally, symbols
675 are stripped from the executable.</dd>
Reid Spencer15e4f742004-10-31 17:58:58 +0000676 <dt><a name="LEVEL"><tt>LEVEL</tt></a><small>(required)</small></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000677 <dd>Specify the level of nesting from the top level. This variable must be
678 set in each makefile as it is used to find the top level and thus the other
679 makefiles.</dd>
680 <dt><a name="LIBRARYNAME"><tt>LIBRARYNAME</tt></a></dt>
Reid Spencer0b166c42004-10-31 17:56:50 +0000681 <dd>Specify the name of the library to be built. (Required For
682 Libraries)</dd>
Reid Spencer9b442262007-02-06 19:00:40 +0000683 <dt><a name="LINK_COMPONENTS"><tt>LINK_COMPONENTS</tt></a></dt>
684 <dd>When specified for building a tool, the value of this variable will be
685 passed to the <tt>llvm-config</tt> tool to generate a link line for the
686 tool. Unlike <tt>USEDLIBS</tt> and <tt>LLVMLIBS</tt>, not all libraries need
687 to be specified. The <tt>llvm-config</tt> tool will figure out the library
688 dependencies and add any libraries that are needed. The <tt>USEDLIBS</tt>
689 variable can still be used in conjunction with <tt>LINK_COMPONENTS</tt> so
690 that additional project-specific libraries can be linked with the LLVM
691 libraries specified by <tt>LINK_COMPONENTS</tt></dd>
Reid Spencer98bb2972006-06-03 18:55:33 +0000692 <dt><a name="LINK_LIBS_IN_SHARED"><tt>LINK_LIBS_IN_SHARED</tt></a></dt>
693 <dd>By default, shared library linking will ignore any libraries specified
694 with the <a href="LLVMLIBS">LLVMLIBS</a> or <a href="USEDLIBS">USEDLIBS</a>.
695 This prevents shared libs from including things that will be in the LLVM
696 tool the shared library will be loaded into. However, sometimes it is useful
697 to link certain libraries into your shared library and this option enables
698 that feature.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000699 <dt><a name="LLVMLIBS"><tt>LLVMLIBS</tt></a></dt>
700 <dd>Specifies the set of libraries from the LLVM $(ObjDir) that will be
701 linked into the tool or library.</dd>
Reid Spencer7c7e9aa2005-01-11 05:12:54 +0000702 <dt><a name="LOADABLE_MODULE"><tt>LOADABLE_MODULE</tt></a></dt>
703 <dd>If set to any value, causes the shared library being built to also be
704 a loadable module. Loadable modules can be opened with the dlopen() function
705 and searched with dlsym (or the operating system's equivalent). Note that
706 setting this variable without also setting <tt>SHARED_LIBRARY</tt> will have
707 no effect.</dd>
Reid Spencer9b81d9c2004-12-05 19:14:31 +0000708 <dt><a name="MODULE_NAME"><tt>MODULE_NAME</tt></a></dt>
Gabor Greif04367bf2007-07-06 22:07:22 +0000709 <dd>Specifies the name of a bitcode module to be created. A bitcode
Reid Spencer9b81d9c2004-12-05 19:14:31 +0000710 module can be specified in conjunction with other kinds of library builds
Gabor Greif04367bf2007-07-06 22:07:22 +0000711 or by itself. It constructs from the sources a single linked bitcode
Reid Spencer9b81d9c2004-12-05 19:14:31 +0000712 file.</dd>
Reid Spencer9b442262007-02-06 19:00:40 +0000713 <dt><a name="NO_INSTALL"><tt>NO_INSTALL</tt></a></dt>
714 <dd>Specifies that the build products of the directory should not be
715 installed but should be built even if the <tt>install</tt> target is given.
716 This is handy for directories that build libraries or tools that are only
717 used as part of the build process, such as code generators (e.g.
718 <tt>tblgen</tt>).</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000719 <dt><a name="OPTIONAL_DIRS"><tt>OPTIONAL_DIRS</tt></a></dt>
720 <dd>Specify a set of directories that may be built, if they exist, but its
721 not an error for them not to exist.</dd>
722 <dt><a name="PARALLEL_DIRS"><tt>PARALLEL_DIRS</tt></a></dt>
723 <dd>Specify a set of directories to build recursively and in parallel if
724 the -j option was used with <tt>make</tt>.</dd>
725 <dt><a name="SHARED_LIBRARY"><tt>SHARED_LIBRARY</tt></a></dt>
726 <dd>If set to any value, causes a shared library (.so) to be built in
727 addition to any other kinds of libraries. Note that this option will cause
728 all source files to be built twice: once with options for position
729 independent code and once without. Use it only where you really need a
730 shared library.</dd>
Reid Spencer0b166c42004-10-31 17:56:50 +0000731 <dt><a name="SOURCES"><tt>SOURCES</tt><small>(optional)</small></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000732 <dd>Specifies the list of source files in the current directory to be
733 built. Source files of any type may be specified (programs, documentation,
734 config files, etc.). If not specified, the makefile system will infer the
735 set of source files from the files present in the current directory.</dd>
736 <dt><a name="SUFFIXES"><tt>SUFFIXES</tt></a></dt>
737 <dd>Specifies a set of filename suffixes that occur in suffix match rules.
738 Only set this if your local <tt>Makefile</tt> specifies additional suffix
739 match rules.</dd>
740 <dt><a name="TARGET"><tt>TARGET</tt></a></dt>
741 <dd>Specifies the name of the LLVM code generation target that the
742 current directory builds. Setting this variable enables additional rules to
743 build <tt>.inc</tt> files from <tt>.td</tt> files. </dd>
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000744 <dt><a name="TESTSUITE"><tt>TESTSUITE</tt></a></dt>
745 <dd>Specifies the directory of tests to run in <tt>llvm/test</tt>.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000746 <dt><a name="TOOLNAME"><tt>TOOLNAME</tt></a></dt>
747 <dd>Specifies the name of the tool that the current directory should
748 build.</dd>
Reid Spencercceed9f2004-11-08 17:32:12 +0000749 <dt><a name="TOOL_VERBOSE"><tt>TOOL_VERBOSE</tt></a></dt>
750 <dd>Implies VERBOSE and also tells each tool invoked to be verbose. This is
751 handy when you're trying to see the sub-tools invoked by each tool invoked
752 by the makefile. For example, this will pass <tt>-v</tt> to the GCC
753 compilers which causes it to print out the command lines it uses to invoke
754 sub-tools (compiler, assembler, linker).</dd>
Reid Spencer0b166c42004-10-31 17:56:50 +0000755 <dt><a name="USEDLIBS"><tt>USEDLIBS</tt></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000756 <dd>Specifies the list of project libraries that will be linked into the
757 tool or library.</dd>
Reid Spencer0b166c42004-10-31 17:56:50 +0000758 <dt><a name="VERBOSE"><tt>VERBOSE</tt></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000759 <dd>Tells the Makefile system to produce detailed output of what it is doing
760 instead of just summary comments. This will generate a LOT of output.</dd>
761 </dl>
Reid Spencer504b21a2004-10-23 07:57:22 +0000762</div>
763
764<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000765<div class="doc_subsection"><a name="overvars">Override Variables</a></div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000766<div class="doc_text">
Reid Spencer2734bf72004-10-31 17:51:38 +0000767 <p>Override variables can be used to override the default
Reid Spencera79e58c2004-10-30 21:39:42 +0000768 values provided by the LLVM makefile system. These variables can be set in
769 several ways:</p>
770 <ul>
771 <li>In the environment (e.g. setenv, export) -- not recommended.</li>
772 <li>On the <tt>make</tt> command line -- recommended.</li>
773 <li>On the <tt>configure</tt> command line</li>
774 <li>In the Makefile (only <em>after</em> the inclusion of <a
Misha Brukman3fecb442004-11-07 22:42:37 +0000775 href="#Makefile.common"><tt>$(LEVEL)/Makefile.common</tt></a>).</li>
Reid Spencera79e58c2004-10-30 21:39:42 +0000776 </ul>
Reid Spencerd8489c72004-12-06 05:35:25 +0000777 <p>The override variables are given below:</p>
Reid Spencera79e58c2004-10-30 21:39:42 +0000778 <dl>
779 <dt><a name="AR"><tt>AR</tt></a> <small>(defaulted)</small></dt>
780 <dd>Specifies the path to the <tt>ar</tt> tool.</dd>
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000781 <dt><a name="PROJ_OBJ_DIR"><tt>PROJ_OBJ_DIR</tt></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000782 <dd>The directory into which the products of build rules will be placed.
783 This might be the same as
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000784 <a href="#PROJ_SRC_DIR"><tt>PROJ_SRC_DIR</tt></a> but typically is
Reid Spencera79e58c2004-10-30 21:39:42 +0000785 not.</dd>
Reid Spencercd7c1ca2005-01-16 07:18:31 +0000786 <dt><a name="PROJ_SRC_DIR"><tt>PROJ_SRC_DIR</tt></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000787 <dd>The directory which contains the source files to be built.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000788 <dt><a name="BZIP2"><tt>BZIP2</tt></a><small>(configured)</small></dt>
789 <dd>The path to the <tt>bzip2</tt> tool.</dd>
790 <dt><a name="CC"><tt>CC</tt></a><small>(configured)</small></dt>
791 <dd>The path to the 'C' compiler.</dd>
792 <dt><a name="CFLAGS"><tt>CFLAGS</tt></a></dt>
793 <dd>Additional flags to be passed to the 'C' compiler.</dd>
794 <dt><a name="CXX"><tt>CXX</tt></a></dt>
795 <dd>Specifies the path to the C++ compiler.</dd>
796 <dt><a name="CXXFLAGS"><tt>CXXFLAGS</tt></a></dt>
797 <dd>Additional flags to be passed to the C++ compiler.</dd>
798 <dt><a name="DATE"><tt>DATE<small>(configured)</small></tt></a></dt>
799 <dd>Specifies the path to the <tt>date</tt> program or any program that can
800 generate the current date and time on its standard output</dd>
801 <dt><a name="DOT"><tt>DOT</tt></a><small>(configured)</small></dt>
802 <dd>Specifies the path to the <tt>dot</tt> tool or <tt>false</tt> if there
803 isn't one.</dd>
804 <dt><a name="ECHO"><tt>ECHO</tt></a><small>(configured)</small></dt>
805 <dd>Specifies the path to the <tt>echo</tt> tool for printing output.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000806 <dt><a name="EXEEXT"><tt>EXEEXT</tt></a><small>(configured)</small></dt>
807 <dd>Provides the extension to be used on executables built by the makefiles.
808 The value may be empty on platforms that do not use file extensions for
809 executables (e.g. Unix).</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000810 <dt><a name="INSTALL"><tt>INSTALL</tt></a><small>(configured)</small></dt>
811 <dd>Specifies the path to the <tt>install</tt> tool.</dd>
812 <dt><a name="LDFLAGS"><tt>LDFLAGS</tt></a><small>(configured)</small></dt>
813 <dd>Allows users to specify additional flags to pass to the linker.</dd>
814 <dt><a name="LIBS"><tt>LIBS</tt></a><small>(configured)</small></dt>
815 <dd>The list of libraries that should be linked with each tool.</dd>
816 <dt><a name="LIBTOOL"><tt>LIBTOOL</tt></a><small>(configured)</small></dt>
817 <dd>Specifies the path to the <tt>libtool</tt> tool. This tool is renamed
818 <tt>mklib</tt> by the <tt>configure</tt> script and always located in the
819 <dt><a name="LLVMAS"><tt>LLVMAS</tt></a><small>(defaulted)</small></dt>
820 <dd>Specifies the path to the <tt>llvm-as</tt> tool.</dd>
Daniel Dunbar797faed2010-02-23 10:00:53 +0000821 <dt><a name="LLVMCC"><tt>LLVMCC</tt></a></dt>
822 <dd>Specifies the path to the LLVM capable compiler.</dd>
823 <dt><a name="LLVMCXX"><tt>LLVMCXX</tt></a></dt>
824 <dd>Specifies the path to the LLVM C++ capable compiler.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000825 <dt><a name="LLVMGCC"><tt>LLVMGCC</tt></a><small>(defaulted)</small></dt>
826 <dd>Specifies the path to the LLVM version of the GCC 'C' Compiler</dd>
827 <dt><a name="LLVMGXX"><tt>LLVMGXX</tt></a><small>(defaulted)</small></dt>
828 <dd>Specifies the path to the LLVM version of the GCC C++ Compiler</dd>
Reid Spencer434262a2007-02-09 15:59:08 +0000829 <dt><a name="LLVMLD"><tt>LLVMLD</tt></a><small>(defaulted)</small></dt>
Gabor Greif04367bf2007-07-06 22:07:22 +0000830 <dd>Specifies the path to the LLVM bitcode linker tool</dd>
Reid Spencer6c8a2f12006-03-23 06:19:04 +0000831 <dt><a name="LLVM_OBJ_ROOT"><tt>LLVM_OBJ_ROOT</tt></a><small>(configured)
832 </small></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000833 <dd>Specifies the top directory into which the output of the build is
834 placed.</dd>
Reid Spencer6c8a2f12006-03-23 06:19:04 +0000835 <dt><a name="LLVM_SRC_ROOT"><tt>LLVM_SRC_ROOT</tt></a><small>(configured)
836 </small></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000837 <dd>Specifies the top directory in which the sources are found.</dd>
Reid Spencer6c8a2f12006-03-23 06:19:04 +0000838 <dt><a name="LLVM_TARBALL_NAME"><tt>LLVM_TARBALL_NAME</tt></a>
839 <small>(configured)</small></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000840 <dd>Specifies the name of the distribution tarball to create. This is
841 configured from the name of the project and its version number.</dd>
842 <dt><a name="MKDIR"><tt>MKDIR</tt></a><small>(defaulted)</small></dt>
843 <dd>Specifies the path to the <tt>mkdir</tt> tool that creates
844 directories.</dd>
Chris Lattner06942902009-04-25 22:08:52 +0000845 <dt><a name="ONLY_TOOLS"><tt>ONLY_TOOLS</tt></a></dt>
846 <dd>If set, specifies the list of tools to build.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000847 <dt><a name="PLATFORMSTRIPOPTS"><tt>PLATFORMSTRIPOPTS</tt></a></dt>
848 <dd>The options to provide to the linker to specify that a stripped (no
849 symbols) executable should be built.</dd>
850 <dt><a name="RANLIB"><tt>RANLIB</tt></a><small>(defaulted)</small></dt>
851 <dd>Specifies the path to the <tt>ranlib</tt> tool.</dd>
852 <dt><a name="RM"><tt>RM</tt></a><small>(defaulted)</small></dt>
853 <dd>Specifies the path to the <tt>rm</tt> tool.</dd>
854 <dt><a name="SED"><tt>SED</tt></a><small>(defaulted)</small></dt>
855 <dd>Specifies the path to the <tt>sed</tt> tool.</dd>
856 <dt><a name="SHLIBEXT"><tt>SHLIBEXT</tt></a><small>(configured)</small></dt>
857 <dd>Provides the filename extension to use for shared libraries.</dd>
858 <dt><a name="TBLGEN"><tt>TBLGEN</tt></a><small>(defaulted)</small></dt>
859 <dd>Specifies the path to the <tt>tblgen</tt> tool.</dd>
860 <dt><a name="TAR"><tt>TAR</tt></a><small>(defaulted)</small></dt>
861 <dd>Specifies the path to the <tt>tar</tt> tool.</dd>
862 <dt><a name="ZIP"><tt>ZIP</tt></a><small>(defaulted)</small></dt>
863 <dd>Specifies the path to the <tt>zip</tt> tool.</dd>
864 </dl>
Reid Spencer504b21a2004-10-23 07:57:22 +0000865</div>
866
867<!-- ======================================================================= -->
868<div class="doc_subsection"><a name="getvars">Readable Variables</a></div>
869<div class="doc_text">
870 <p>Variables listed in the table below can be used by the user's Makefile but
871 should not be changed. Changing the value will generally cause the build to go
872 wrong, so don't do it.</p>
Reid Spencera79e58c2004-10-30 21:39:42 +0000873 <dl>
874 <dt><a name="bindir"><tt>bindir</tt></a></dt>
875 <dd>The directory into which executables will ultimately be installed. This
876 value is derived from the <tt>--prefix</tt> option given to
877 <tt>configure</tt>.</dd>
Reid Spencer632bd062004-11-01 07:53:17 +0000878 <dt><a name="BuildMode"><tt>BuildMode</tt></a></dt>
879 <dd>The name of the type of build being performed: Debug, Release, or
880 Profile</dd>
Gabor Greif04367bf2007-07-06 22:07:22 +0000881 <dt><a name="bitcode_libdir"><tt>bytecode_libdir</tt></a></dt>
882 <dd>The directory into which bitcode libraries will ultimately be
Reid Spencer6c8a2f12006-03-23 06:19:04 +0000883 installed. This value is derived from the <tt>--prefix</tt> option given to
Reid Spencera79e58c2004-10-30 21:39:42 +0000884 <tt>configure</tt>.</dd>
885 <dt><a name="ConfigureScriptFLAGS"><tt>ConfigureScriptFLAGS</tt></a></dt>
886 <dd>Additional flags given to the <tt>configure</tt> script when
887 reconfiguring.</dd>
888 <dt><a name="DistDir"><tt>DistDir</tt></a></dt>
889 <dd>The <em>current</em> directory for which a distribution copy is being
890 made.</dd>
891 <dt><a name="Echo"><tt>Echo</tt></a></dt>
892 <dd>The LLVM Makefile System output command. This provides the
893 <tt>llvm[n]</tt> prefix and starts with @ so the command itself is not
894 printed by <tt>make</tt>.</dd>
895 <dt><a name="EchoCmd"><tt>EchoCmd</tt></a></dt>
896 <dd> Same as <a href="#Echo"><tt>Echo</tt></a> but without the leading @.
897 </dd>
898 <dt><a name="includedir"><tt>includedir</tt></a></dt>
899 <dd>The directory into which include files will ultimately be installed.
900 This value is derived from the <tt>--prefix</tt> option given to
901 <tt>configure</tt>.</dd>
902 <dt><a name="libdir"><tt>libdir</tt></a></dt><dd></dd>
903 <dd>The directory into which native libraries will ultimately be installed.
904 This value is derived from the <tt>--prefix</tt> option given to
905 <tt>configure</tt>.</dd>
906 <dt><a name="LibDir"><tt>LibDir</tt></a></dt>
907 <dd>The configuration specific directory into which libraries are placed
908 before installation.</dd>
909 <dt><a name="MakefileConfig"><tt>MakefileConfig</tt></a></dt>
910 <dd>Full path of the <tt>Makefile.config</tt> file.</dd>
911 <dt><a name="MakefileConfigIn"><tt>MakefileConfigIn</tt></a></dt>
912 <dd>Full path of the <tt>Makefile.config.in</tt> file.</dd>
913 <dt><a name="ObjDir"><tt>ObjDir</tt></a></dt>
914 <dd>The configuration and directory specific directory where build objects
915 (compilation results) are placed.</dd>
916 <dt><a name="SubDirs"><tt>SubDirs</tt></a></dt>
917 <dd>The complete list of sub-directories of the current directory as
918 specified by other variables.</dd>
919 <dt><a name="Sources"><tt>Sources</tt></a></dt>
920 <dd>The complete list of source files.</dd>
921 <dt><a name="sysconfdir"><tt>sysconfdir</tt></a></dt>
John Criswell8b88b462004-11-21 15:11:37 +0000922 <dd>The directory into which configuration files will ultimately be
Reid Spencera79e58c2004-10-30 21:39:42 +0000923 installed. This value is derived from the <tt>--prefix</tt> option given to
924 <tt>configure</tt>.</dd>
925 <dt><a name="ToolDir"><tt>ToolDir</tt></a></dt>
926 <dd>The configuration specific directory into which executables are placed
927 before they are installed.</dd>
928 <dt><a name="TopDistDir"><tt>TopDistDir</tt></a></dt>
Reid Spencerd8489c72004-12-06 05:35:25 +0000929 <dd>The top most directory into which the distribution files are copied.
930 </dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000931 <dt><a name="Verb"><tt>Verb</tt></a></dt>
932 <dd>Use this as the first thing on your build script lines to enable or
933 disable verbose mode. It expands to either an @ (quiet mode) or nothing
934 (verbose mode). </dd>
935 </dl>
936</div>
937
938<!-- ======================================================================= -->
939<div class="doc_subsection"><a name="intvars">Internal Variables</a></div>
940<div class="doc_text">
941 <p>Variables listed below are used by the LLVM Makefile System
942 and considered internal. You should not use these variables under any
943 circumstances.</p>
Reid Spencerd8489c72004-12-06 05:35:25 +0000944 <p><tt>
945 Archive
946 AR.Flags
947 BaseNameSources
948 BCCompile.C
949 BCCompile.CXX
950 BCLinkLib
Reid Spencerd8489c72004-12-06 05:35:25 +0000951 C.Flags
952 Compile.C
953 CompileCommonOpts
954 Compile.CXX
955 ConfigStatusScript
956 ConfigureScript
957 CPP.Flags
958 CPP.Flags
959 CXX.Flags
960 DependFiles
961 DestArchiveLib
Gabor Greif04367bf2007-07-06 22:07:22 +0000962 DestBitcodeLib
Reid Spencerd8489c72004-12-06 05:35:25 +0000963 DestModule
Reid Spencerd8489c72004-12-06 05:35:25 +0000964 DestSharedLib
965 DestTool
966 DistAlways
967 DistCheckDir
968 DistCheckTop
969 DistFiles
970 DistName
971 DistOther
972 DistSources
973 DistSubDirs
974 DistTarBZ2
975 DistTarGZip
976 DistZip
977 ExtraLibs
978 FakeSources
979 INCFiles
980 InternalTargets
981 LD.Flags
Reid Spencerd8489c72004-12-06 05:35:25 +0000982 LibName.A
983 LibName.BC
984 LibName.LA
985 LibName.O
986 LibTool.Flags
987 Link
988 LinkModule
Reid Spencerd8489c72004-12-06 05:35:25 +0000989 LLVMLibDir
990 LLVMLibsOptions
991 LLVMLibsPaths
992 LLVMToolDir
993 LLVMUsedLibs
994 LocalTargets
Reid Spencerd8489c72004-12-06 05:35:25 +0000995 Module
996 ObjectsBC
997 ObjectsLO
998 ObjectsO
999 ObjMakefiles
1000 ParallelTargets
1001 PreConditions
1002 ProjLibsOptions
1003 ProjLibsPaths
1004 ProjUsedLibs
1005 Ranlib
1006 RecursiveTargets
Reid Spencerd8489c72004-12-06 05:35:25 +00001007 SrcMakefiles
1008 Strip
1009 StripWarnMsg
1010 TableGen
1011 TDFiles
1012 ToolBuildPath
1013 TopLevelTargets
1014 UserTargets
Reid Spencerd8489c72004-12-06 05:35:25 +00001015 </tt></p>
Reid Spencer504b21a2004-10-23 07:57:22 +00001016</div>
1017
1018<!-- *********************************************************************** -->
1019<hr>
1020<address>
1021 <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
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Reid Spencer504b21a2004-10-23 07:57:22 +00001023 <a href="http://validator.w3.org/check/referer"><img
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Reid Spencer504b21a2004-10-23 07:57:22 +00001025
1026 <a href="mailto:rspencer@x10sys.com">Reid Spencer</a><br>
Reid Spencer05fe4b02006-03-14 05:39:39 +00001027 <a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br>
Reid Spencer504b21a2004-10-23 07:57:22 +00001028 Last modified: $Date$
1029</address>
Reid Spencer504b21a2004-10-23 07:57:22 +00001030</body>
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