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5 <title>LLVM Makefile Guide</title>
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8<body>
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 +0000[diff] [blame]17 <li><a href="#varvals">Variable Values</a></li>
Reid Spencer0b166c42004-10-31 17:56:50 +0000[diff] [blame]18 <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 +0000[diff] [blame]26 <li><a href="#Comments">Comments</a></li>
27 </ol>
28 </li>
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]29 <li><a href="#tutorial">Tutorial</a>
30 <ol>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]31 <li><a href="#libraries">Libraries</a>
32 <ol>
33 <li><a href="#Modules">Bytecode Modules</a></li>
34 </ol>
35 </li>
Reid Spencer6f14a5b2004-11-29 07:47:16 +0000[diff] [blame]36 <li><a href="#tools">Tools</a>
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000[diff] [blame]37 <ol>
38 <li><a href="#JIT">JIT Tools</a></li>
39 </ol>
Reid Spencer6f14a5b2004-11-29 07:47:16 +0000[diff] [blame]40 </li>
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]41 </ol>
42 </li>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]43 <li><a href="#targets">Targets Supported</a>
44 <ol>
45 <li><a href="#all">all</a></li>
46 <li><a href="#all-local">all-local</a></li>
47 <li><a href="#check">check</a></li>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]48 <li><a href="#check-local">check-local</a></li>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]49 <li><a href="#clean">clean</a></li>
50 <li><a href="#clean-local">clean-local</a></li>
51 <li><a href="#dist">dist</a></li>
52 <li><a href="#dist-check">dist-check</a></li>
53 <li><a href="#dist-clean">dist-clean</a></li>
54 <li><a href="#install">install</a></li>
Reid Spencere1907862004-10-31 18:50:34 +0000[diff] [blame]55 <li><a href="#preconditions">preconditions</a></li>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]56 <li><a href="#printvars">printvars</a></li>
Reid Spencerf13a2692004-12-17 07:46:45 +0000[diff] [blame]57 <li><a href="#reconfigure">reconfigure</a></li>
58 <li><a href="#spotless">spotless</a></li>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]59 <li><a href="#tags">tags</a></li>
60 <li><a href="#uninstall">uninstall</a></li>
61 </ol>
62 </li>
63 <li><a href="#variables">Using Variables</a>
64 <ol>
65 <li><a href="#setvars">Control Variables</a></li>
66 <li><a href="#overvars">Override Variables</a></li>
67 <li><a href="#getvars">Readable Variables</a></li>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]68 <li><a href="#intvars">Internal Variables</a></li>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]69 </ol>
70 </li>
71</ol>
72
73<div class="doc_author">
74 <p>Written by <a href="mailto:reid@x10sys.com">Reid Spencer</a></p>
75</div>
76
77<!-- *********************************************************************** -->
78<div class="doc_section"><a name="introduction">Introduction </a></div>
79<!-- *********************************************************************** -->
80
81<div class="doc_text">
82 <p>This document provides <em>usage</em> information about the LLVM makefile
83 system. While loosely patterned after the BSD makefile system, LLVM has taken
Chris Lattner72f08912004-10-25 19:28:03 +0000[diff] [blame]84 a departure from BSD in order to implement additional features needed by LLVM.
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]85 Although makefile systems such as automake were attempted at one point, it
86 has become clear that the features needed by LLVM and the Makefile norm are
87 too great to use a more limited tool. Consequently, LLVM requires simply GNU
88 Make 3.79, a widely portable makefile processor. LLVM unabashedly makes heavy
89 use of the features of GNU Make so the dependency on GNU Make is firm. If
90 you're not familiar with <tt>make</tt>, it is recommended that you read the
91 <a href="http://www.gnu.org/software/make/manual/make.html">GNU Makefile Manual
92 </a>.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]93 <p>While this document is rightly part of the
94 <a href="ProgrammersManual.html">LLVM Programmer's Manual</a>, it is treated
95 separately here because of the volume of content and because it is often an
96 early source of bewilderment for new developers.</p>
97</div>
98
99<!-- *********************************************************************** -->
100<div class="doc_section"><a name="general">General Concepts</a></div>
101<!-- *********************************************************************** -->
102
103<div class="doc_text">
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]104 <p>The LLVM Makefile System is the component of LLVM that is responsible for
105 building the software, testing it, generating distributions, checking those
106 distributions, installing and uninstalling, etc. It consists of a several
107 files throughout the source tree. These files and other general concepts are
108 described in this section.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]109</div>
110
111<!-- ======================================================================= -->
112<div class="doc_subsection"><a name="projects">Projects</a></div>
113<div class="doc_text">
114 <p>The LLVM Makefile System is quite generous. It not only builds its own
115 software, but it can build yours too. Built into the system is knowledge of
116 the <tt>llvm/projects</tt> directory. Any directory under <tt>projects</tt>
117 that has both a <tt>configure</tt> script and a <tt>Makefile</tt> is assumed
118 to be a project that uses the LLVM Makefile system. This allows your project
119 to get up and running quickly by utilizing the built-in features that are used
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]120 to compile LLVM. LLVM compiles itself using the same features of the makefile
121 system as used for projects.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]122</div>
123
124<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]125<div class="doc_subsection"><a name="varvalues">Variable Values</a></div>
126<div class="doc_text">
127 <p>To use the makefile system, you simply create a file named
128 <tt>Makefile</tt> in your directory and declare values for certain variables.
129 The variables and values that you select determine what the makefile system
130 will do. These variables enable rules and processing in the makefile system
131 that automatically Do The Right Thing&trade;.
132</div>
133
134<!-- ======================================================================= -->
135<div class="doc_subsection"><a name="including">Including Makefiles</a></div>
136<div class="doc_text">
137 <p>Setting variables alone is not enough. You must include into your Makefile
138 additional files that provide the rules of the LLVM Makefile system. The
139 various files involved are described in the sections that follow.</p>
140</div>
141
142<!-- ======================================================================= -->
143<div class="doc_subsubsection"><a name="Makefile">Makefile</a></div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]144<div class="doc_text">
145 <p>Each directory to participate in the build needs to have a file named
146 <tt>Makefile</tt>. This is the file first read by <tt>make</tt>. It has three
147 sections:</p>
148 <ol>
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]149 <li><a href="#setvars">Settable Variables</a> - Required that must be set
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]150 first.</li>
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]151 <li><a href="#Makefile.common">include <tt>$(LEVEL)/Makefile.common</tt></a>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]152 - include the LLVM Makefile system.
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]153 <li><a href="#overvars">Override Variables</a> - Override variables set by
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]154 the LLVM Makefile system.
155 </ol>
156</div>
157
158<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]159<div class="doc_subsubsection"><a name="Makefile.common">Makefile.common</a>
160</div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]161<div class="doc_text">
162 <p>Every project must have a <tt>Makefile.common</tt> file at its top source
163 directory. This file serves three purposes:</p>
164 <ol>
165 <li>It includes the project's configuration makefile to obtain values
166 determined by the <tt>configure</tt> script. This is done by including the
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]167 <a href="#Makefile.config"><tt>$(LEVEL)/Makefile.config</tt></a> file.</li>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]168 <li>It specifies any other (static) values that are needed throughout the
169 project. Only values that are used in all or a large proportion of the
170 project's directories should be placed here.</li>
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]171 <li>It includes the standard rules for the LLVM Makefile system,
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]172 <a href="#Makefile.rules"><tt>$(LLVM_SRC_ROOT)/Makefile.rules</tt></a>.
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]173 This file is the "guts" of the LLVM Makefile system.</li>
174 </ol>
175</div>
176
177<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]178<div class="doc_subsubsection"><a name="Makefile.config">Makefile.config</a>
179</div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]180<div class="doc_text">
181 <p>Every project must have a <tt>Makefile.config</tt> at the top of its
182 <em>build</em> directory. This file is <b>generated</b> by the
183 <tt>configure</tt> script from the pattern provided by the
184 <tt>Makefile.config.in</tt> file located at the top of the project's
185 <em>source</em> directory. The contents of this file depend largely on what
186 configuration items the project uses, however most projects can get what they
187 need by just relying on LLVM's configuration found in
188 <tt>$(LLVM_OBJ_ROOT)/Makefile.config</tt>.
189</div>
190
191<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]192<div class="doc_subsubsection"><a name="Makefile.rules">Makefile.rules</a></div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]193<div class="doc_text">
194 <p>This file, located at <tt>$(LLVM_SRC_ROOT)/Makefile.rules</tt> is the heart
195 of the LLVM Makefile System. It provides all the logic, dependencies, and
196 rules for building the targets supported by the system. What it does largely
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]197 depends on the values of <tt>make</tt> <a href="#variables">variables</a> that
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]198 have been set <em>before</em> <tt>Makefile.rules</tt> is included.
199</div>
200
201<!-- ======================================================================= -->
202<div class="doc_subsection"><a name="Comments">Comments</a></div>
203<div class="doc_text">
204 <p>User Makefiles need not have comments in them unless the construction is
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]205 unusual or it does not strictly follow the rules and patterns of the LLVM
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]206 makefile system. Makefile comments are invoked with the pound (#) character.
207 The # character and any text following it, to the end of the line, are ignored
208 by <tt>make</tt>.</p>
209</div>
210
211<!-- *********************************************************************** -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]212<div class="doc_section"><a name="tutorial">Tutorial</a></div>
213<!-- *********************************************************************** -->
214<div class="doc_text">
215 <p>This section provides some examples of the different kinds of modules you
216 can build with the LLVM makefile system. In general, each directory you
217 provide will build a single object although that object may be composed of
218 additionally compiled components.</p>
219</div>
220
221<!-- ======================================================================= -->
222<div class="doc_subsection"><a name="libraries">Libraries</a></div>
223<div class="doc_text">
224 <p>Only a few variable definitions are needed to build a regular library.
225 Normally, the makefile system will build all the software into a single
226 <tt>libname.o</tt> (pre-linked) object. This means the library is not
227 searchable and that the distinction between compilation units has been
228 dissolved. Optionally, you can ask for a shared library (.so), archive library
229 (.a) or to not have the default (relinked) library built. For example:</p>
230 <pre><tt>
231 LIBRARYNAME = mylib
232 SHARED_LIBRARY = 1
233 ARCHIVE_LIBRARY = 1
234 DONT_BUILT_RELINKED = 1
235 </tt></pre>
236 <p>says to build a library named "mylib" with both a shared library
237 (<tt>mylib.so</tt>) and an archive library (<tt>mylib.a</tt>) version but
238 not to build the relinked object (<tt>mylib.o</tt>). The contents of all the
239 libraries produced will be the same, they are just constructed differently.
240 Note that you normally do not need to specify the sources involved. The LLVM
241 Makefile system will infer the source files from the contents of the source
242 directory.</p>
243</div>
244
245<!-- ======================================================================= -->
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]246<div class="doc_subsubsection"><a name="Modules">Bytecode Modules</a></div>
247<div class="doc_text">
248 <p>In some situations, it is desireable to build a single bytecode module from
249 a variety of sources, instead of an archive, shared library, or bytecode
250 library. Bytecode modules can be specified in addition to any of the other
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000[diff] [blame]251 types of libraries by defining the <a href="#MODULE_NAME">MODULE_NAME</a>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]252 variable. For example:</p>
253 <pre><tt>
254 LIBRARYNAME = mylib
255 BYTECODE_LIBRARY = 1
256 MODULE_NAME = mymod
257 </tt></pre>
258 <p>will build a module named <tt>mymod.bc</tt> from the sources in the
259 directory. This module will be an aggregation of all the bytecode modules
260 derived from the sources. The example will also build a bytecode archive
261 containing a bytecode module for each compiled source file. The difference is
262 subtle, but important depending on how the module or library is to be linked.
263 </p>
264</div>
265
266<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]267<div class="doc_subsection"><a name="tools">Tools</a></div>
268<div class="doc_text">
269 <p>For building executable programs (tools), you must provide the name of the
270 tool and the names of the libraries you wish to link with the tool. For
271 example:</p>
272 <pre><tt>
273 TOOLNAME = mytool
274 USEDLIBS = mylib
275 LLVMLIBS = LLVMSupport.a LLVMSystem.a
276 </tt></pre>
277 <p>says that we are to build a tool name <tt>mytool</tt> and that it requires
278 three libraries: <tt>mylib</tt>, <tt>LLVMSupport.a</tt> and
279 <tt>LLVMSystem.a</tt>.</p>
280 <p>Note that two different variables are use to indicate which libraries are
281 linked: <tt>USEDLIBS</tt> and <tt>LLVMLIBS</tt>. This distinction is necessary
282 to support projects. <tt>LLVMLIBS</tt> refers to the LLVM libraries found in
283 the LLVM object directory. <tt>USEDLIBS</tt> refers to the libraries built by
284 your project. In the case of building LLVM tools, <tt>USEDLIBS</tt> and
285 <tt>LLVMLIBS</tt> can be used interchangeably since the "project" is LLVM
286 itself and <tt>USEDLIBS</tt> refers to the same place as <tt>LLVMLIBS</tt>.
287 </p>
288 <p>Also note that there are two different ways of specifying a library: with a
289 <tt>.a</tt> suffix and without. Without the suffix, the entry refers to the
290 re-linked (.o) file which will include <em>all</em> symbols of the library.
291 This is useful, for example, to include all passes from a library of passes.
292 If the <tt>.a</tt> suffix is used then the library is linked as a searchable
293 library (with the <tt>-l</tt> option). In this case, only the symbols that are
294 unresolved <em>at that point</em> will be resolved from the library, if they
295 exist. Other (unreferenced) symbols will not be included when the <tt>.a</tt>
296 syntax is used. Note that in order to use the <tt>.a</tt> suffix, the library
297 in question must have been built with the <tt>ARCHIVE_LIBRARY</tt> option set.
298 </p>
299</div>
300
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000[diff] [blame]301<!-- ======================================================================= -->
302<div class="doc_subsubsection"><a name="JIT">JIT Tools</a></div>
303<div class="doc_text">
304 <p>Many tools will want to use the JIT features of LLVM. However, getting the
305 right set of libraries to link with is tedious, platform specific, and error
306 prone. Additionally, the JIT has special linker switch options that it needs.
307 Consequently, to make it easier to build tools that use the JIT, you can
Reid Spencer6f14a5b2004-11-29 07:47:16 +0000[diff] [blame]308 use a special value for the <tt>LLVMLIBS</tt> variable:</p>
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000[diff] [blame]309 <pre><tt>
310 TOOLNAME = my_jit_tool
311 USEDLIBS = mylib
312 LLVMLIBS = JIT
313 </tt></pre>
314 <p>Using a value of <tt>JIT</tt> for <tt>LLVMLIBS</tt> tells the makefile
315 system to construct a special value for LLVMLIBS that gives the program all
316 the LLVM libraries needed to run the JIT. Any additional libraries needed can
317 still be specified with <tt>USEDLIBS</tt>. To get a full understanding of how
318 this changes the linker command, it is recommended that you:</p>
319 <pre><tt>
320 cd examples/Fibonacci
321 make VERBOSE=1
322 </tt></pre>
323 <p>By default, using <tt>LLVMLIBS=JIT</tt> will link in enough to support JIT
324 code generation for the architecture on which the tool is linked. If you need
325 additional target architectures linked in, you may specify them on the command
326 line or in your <tt>Makefile</tt>. For example:</p>
327 <pre><tt>
328 ENABLE_X86_JIT=1
329 ENABLE_SPARCV9_JIT=1
330 ENALBE_PPC_JIT=1
331 </tt></pre>
332 <p>will cause the tool to be able to generate code for all three platforms.
333 </p>
334</div>
335
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]336<!-- *********************************************************************** -->
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]337<div class="doc_section"><a name="targets">Targets Supported</a></div>
338<!-- *********************************************************************** -->
339
340<div class="doc_text">
341 <p>This section describes each of the targets that can be built using the LLVM
342 Makefile system. Any target can be invoked from any directory but not all are
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]343 applicable to a given directory (e.g. "check", "dist" and "install" will
Chris Lattnerff52f9c2004-12-04 00:04:48 +0000[diff] [blame]344 always operate as if invoked from the top level directory).</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]345
346 <table style="text-align:left">
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]347 <tr>
348 <th>Target Name</th><th>Implied Targets</th><th>Target Description</th>
349 </tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]350 <tr><td><a href="#all"><tt>all</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]351 <td>Compile the software recursively. Default target.
352 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]353 <tr><td><a href="#all-local"><tt>all-local</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]354 <td>Compile the software in the local directory only.
355 </td></tr>
Chris Lattnerff52f9c2004-12-04 00:04:48 +0000[diff] [blame]356 <tr><td><a href="#check"><tt>check</tt></a></td><td></td>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]357 <td>Change to the <tt>test</tt> directory in a project and run the
358 test suite there.
359 </td></tr>
360 <tr><td><a href="#check-local"><tt>check-local</tt></a></td><td></td>
361 <td>Run a local test suite. Generally this is only defined in the
362 <tt>Makefile</tt> of the project's <tt>test</tt> directory.
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]363 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]364 <tr><td><a href="#clean"><tt>clean</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]365 <td>Remove built objects recursively.
366 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]367 <tr><td><a href="#clean-local"><tt>clean-local</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]368 <td>Remove built objects from the local directory only.
369 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]370 <tr><td><a href="#dist"><tt>dist</tt></a></td><td>all</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]371 <td>Prepare a source distribution tarball.
372 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]373 <tr><td><a href="#dist-check"><tt>dist-check</tt></a></td><td>all check</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]374 <td>Prepare a source distribution tarball and check that it builds.
375 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]376 <tr><td><a href="#dist-clean"><tt>dist-clean</tt></a></td><td>clean</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]377 <td>Clean source distribution tarball temporary files.
378 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]379 <tr><td><a href="#install"><tt>install</tt></a></td><td>all</td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]380 <td>Copy built objects to installation directory.
381 </td></tr>
Reid Spencere1907862004-10-31 18:50:34 +0000[diff] [blame]382 <tr><td><a href="#preconditions"><tt>preconditions</tt></a></td><td>all</td>
383 <td>Check to make sure configuration and makefiles are up to date.
384 </td></tr>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]385 <tr><td><a href="#printvars"><tt>printvars</tt></a></td><td>all</td>
386 <td>Prints variables defined by the makefile system (for debugging).
387 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]388 <tr><td><a href="#tags"><tt>tags</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]389 <td>Make C and C++ tags files for emacs and vi.
390 </td></tr>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]391 <tr><td><a href="#uninstall"><tt>uninstall</tt></a></td><td></td>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]392 <td>Remove built objects from installation directory.
393 </td></tr>
394 </table>
395</div>
396
397<!-- ======================================================================= -->
398<div class="doc_subsection"><a name="all">all (default)</a></div>
399<div class="doc_text">
400 <p>When you invoke <tt>make</tt> with no arguments, you are implicitly
401 instructing it to seek the "all" target (goal). This target is used for
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]402 building the software recursively and will do different things in different
403 directories. For example, in a <tt>lib</tt> directory, the "all" target will
404 compile source files and generate libraries. But, in a <tt>tools</tt>
405 directory, it will link libraries and generate executables.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]406</div>
407
408<!-- ======================================================================= -->
409<div class="doc_subsection"><a name="all-local">all-local</a></div>
410<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]411 <p>This target is the same as <a href="#all">all</a> but it operates only on
412 the current directory instead of recursively.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]413</div>
414
415<!-- ======================================================================= -->
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]416<div class="doc_subsection"><a name="check">check</a></div>
417<div class="doc_text">
418 <p>This target can be invoked from anywhere within a project's directories
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000[diff] [blame]419 but always invokes the <a href="#check-local"><tt>check-local</tt></a> target
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]420 in the project's <tt>test</tt> directory, if it exists and has a
421 <tt>Makefile</tt>. A warning is produced otherwise. If
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000[diff] [blame]422 <a href="#TESTSUITE"><tt>TESTSUITE</tt></a> is defined on the <tt>make</tt>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]423 command line, it will be passed down to the invocation of
424 <tt>make check-local</tt> in the <tt>test</tt> directory. The intended usage
425 for this is to assist in running specific suites of tests. If
426 <tt>TESTSUITE</tt> is not set, the implementation of <tt>check-local</tt>
427 should run all normal tests. It is up to the project to define what
428 different values for <tt>TESTSUTE</tt> will do. See the
429 <a href="TestingGuide.html">TestingGuide</a> for further details.</p>
430</div>
431
432<!-- ======================================================================= -->
433<div class="doc_subsection"><a name="check-local">check-local</a></div>
434<div class="doc_text">
435 <p>This target should be implemented by the <tt>Makefile</tt> in the project's
436 <tt>test</tt> directory. It is invoked by the <tt>check</tt> target elsewhere.
437 Each project is free to define the actions of <tt>check-local</tt> as
438 appropriate for that project. The LLVM project itself uses dejagnu to run a
439 suite of feature and regresson tests. Other projects may choose to use
440 dejagnu or any other testing mechanism.</p>
441</div>
442
443<!-- ======================================================================= -->
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]444<div class="doc_subsection"><a name="clean">clean</a></div>
445<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]446 <p>This target cleans the build directory, recursively removing all things
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]447 that the Makefile builds. The cleaning rules have been made guarded so they
448 shouldn't go awry (via <tt>rm -f $(UNSET_VARIABLE)/*</tt> which will attempt
449 to erase the entire directory structure.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]450</div>
451
452<!-- ======================================================================= -->
453<div class="doc_subsection"><a name="clean-local">clean-local</a></div>
454<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]455 <p>This target does the same thing as <tt>clean</tt> but only for the current
456 (local) directory.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]457</div>
458
459<!-- ======================================================================= -->
460<div class="doc_subsection"><a name="dist">dist</a></div>
461<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]462 <p>This target builds a distribution tarball. It first builds the entire
463 project using the <tt>all</tt> target and then tars up the necessary files and
464 compresses it. The generated tarball is sufficient for a casual source
465 distribution, but probably not for a release (see <tt>dist-check</tt>).</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]466</div>
467
468<!-- ======================================================================= -->
469<div class="doc_subsection"><a name="dist-check">dist-check</a></div>
470<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]471 <p>This target does the same thing as the <tt>dist</tt> target but also checks
472 the distribution tarball. The check is made by unpacking the tarball to a new
473 directory, configuring it, building it, installing it, and then verifying that
474 the installation results are correct (by comparing to the original build).
475 This target can take a long time to run but should be done before a release
476 goes out to make sure that the distributed tarball can actually be built into
477 a working release.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]478</div>
479
480<!-- ======================================================================= -->
481<div class="doc_subsection"><a name="dist-clean">dist-clean</a></div>
482<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]483 <p>This is a special form of the <tt>clean</tt> clean target. It performs a
484 normal <tt>clean</tt> but also removes things pertaining to building the
485 distribution.</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]486</div>
487
488<!-- ======================================================================= -->
489<div class="doc_subsection"><a name="install">install</a></div>
490<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]491 <p>This target finalizes shared objects and executables and copies all
Reid Spencer31ce7fb2004-11-29 07:44:51 +0000[diff] [blame]492 libraries, headers, executables and documentation to the directory given
493 with the <tt>--prefix</tt> option to <tt>configure</tt>. When completed,
494 the prefix directory will have everything needed to <b>use</b> LLVM. </p>
495 <p>The LLVM makefiles can generate complete <b>internal</b> documentation
496 for all the classes by using <tt>doxygen</tt>. By default, this feature is
497 <b>not</b> enabled because it takes a long time and generates a massive
498 amount of data (>100MB). If you want this feature, you must configure LLVM
499 with the --enable-doxygen switch and ensure that a modern version of doxygen
500 (1.3.7 or later) is available in your <tt>PATH</tt>. You can download
501 doxygen from
502 <a href="http://www.stack.nl/~dimitri/doxygen/download.html#latestsrc">
503 here</a>.
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]504</div>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]505
506<!-- ======================================================================= -->
Reid Spencere1907862004-10-31 18:50:34 +0000[diff] [blame]507<div class="doc_subsection"><a name="preconditions">preconditions</a></div>
508<div class="doc_text">
509 <p>This utility target checks to see if the <tt>Makefile</tt> in the object
510 directory is older than the <tt>Makefile</tt> in the source directory and
511 copies it if so. It also reruns the <tt>configure</tt> script if that needs to
512 be done and rebuilds the <tt>Makefile.config</tt> file similarly. Users may
513 overload this target to ensure that sanity checks are run <em>before</em> any
514 building of targets as all the targets depend on <tt>preconditions</tt>.</p>
515</div>
516
517<!-- ======================================================================= -->
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]518<div class="doc_subsection"><a name="printvars">printvars</a></div>
519<div class="doc_text">
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]520 <p>This utility target just causes the LLVM makefiles to print out some of
521 the makefile variables so that you can double check how things are set. </p>
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]522</div>
523
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]524<!-- ======================================================================= -->
Reid Spencerf13a2692004-12-17 07:46:45 +0000[diff] [blame]525<div class="doc_subsection"><a name="reconfigure">reconfigure</a></div>
526<div class="doc_text">
527 <p>This utility target will force a reconfigure of LLVM or your project. It
528 simply runs <tt>$(BUILD_OBJ_ROOT)/config.status --recheck</tt> to rerun the
529 configuration tests and rebuild the configured files. This isn't generally
530 useful as the makefiles will reconfigure themselves whenever its necessary.
531 </p>
532</div>
533
534<!-- ======================================================================= -->
535<div class="doc_subsection"><a name="spotless">spotless</a></div>
536<div class="doc_text">
537 <p>This utility target, only available when <tt>$(BUILD_OBJ_ROOT)</tt> is not
538 the same as <tt>$(BUILD_SRC_ROOT)</tt>, will completely clean the
539 <tt>$(BUILD_OBJ_ROOT)</tt> directoy by removing its content entirely and
540 reconfiguring the directory. This returns the <tt>$(BUILD_OBJ_ROOT)</tt>
541 directory to a completely fresh state. All content in the directory except
542 configured files and top-level makefiles will be lost.
543 <font color="red">Use with caution.</font></p>
544</div>
545
546<!-- ======================================================================= -->
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]547<div class="doc_subsection"><a name="tags">tags</a></div>
548<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]549 <p>This target will generate a <tt>TAGS</tt> file in the top-level source
550 directory. It is meant for use with emacs, XEmacs, or ViM. The TAGS file
551 provides an index of symbol definitions so that the editor can jump you to the
552 definition quickly. </p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]553</div>
554
555<!-- ======================================================================= -->
556<div class="doc_subsection"><a name="uninstall">uninstall</a></div>
557<div class="doc_text">
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]558 <p>This target is the opposite of the <tt>install</tt> target. It removes the
559 header, library and executable files from the installation directories. Note
Chris Lattner72f08912004-10-25 19:28:03 +0000[diff] [blame]560 that the directories themselves are not removed because it is not guaranteed
Reid Spencer714b52b2004-10-24 08:48:59 +0000[diff] [blame]561 that LLVM is the only thing installing there (e.g. --prefix=/usr).</p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]562</div>
563
564<!-- *********************************************************************** -->
565<div class="doc_section"><a name="variables">Variables</a></div>
566<!-- *********************************************************************** -->
567<div class="doc_text">
568 <p>Variables are used to tell the LLVM Makefile System what to do and to
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]569 obtain information from it. Variables are also used internally by the LLVM
570 Makefile System. Variable names that contain only the upper case alphabetic
571 letters and underscore are intended for use by the end user. All other
572 variables are internal to the LLVM Makefile System and should not be relied
573 upon nor modified. The sections below describe how to use the LLVM Makefile
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]574 variables.</p>
575</div>
576
577<!-- ======================================================================= -->
578<div class="doc_subsection"><a name="setvars">Control Variables</a></div>
579<div class="doc_text">
580 <p>Variables listed in the table below should be set <em>before</em> the
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]581 inclusion of <a href="#Makefile.common"><tt>$(LEVEL)/Makefile.common</tt></a>.
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]582 These variables provide input to the LLVM make system that tell it what to do
583 for the current directory.</p>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]584 <dl>
585 <dt><a name="BUILD_ARCHIVE"><tt>BUILD_ARCHIVE</tt></a></dt>
586 <dd>If set to any value, causes an archive (.a) library to be built.</dd>
587 <dt><a name="BUILT_SOURCES"><tt>BUILT_SOURCES</tt></a></dt>
588 <dd>Specifies a set of source files that are generated from other source
589 files. These sources will be built before any other target processing to
Reid Spencer0b166c42004-10-31 17:56:50 +0000[diff] [blame]590 ensure they are present.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]591 <dt><a name="BYTECODE_LIBRARY"><tt>BYTECODE_LIBRARY</tt></a></dt>
592 <dd>If set to any value, causes a bytecode library (.bc) to be built.</dd>
593 <dt><a name="CONFIG_FILES"><tt>CONFIG_FILES</tt></a></dt>
594 <dd>Specifies a set of configuration files to be installed.</dd>
595 <dt><a name="DIRS"><tt>DIRS</tt></a></dt>
596 <dd>Specifies a set of directories, usually children of the current
597 directory, that should also be made using the same goal. These directories
598 will be built serially.</dd>
599 <dt><a name="DISABLE_AUTO_DEPENDENCIES"><tt>DISABLE_AUTO_DEPENDENCIES</tt></a></dt>
600 <dd>If set to any value, causes the makefiles to <b>not</b> automatically
601 generate dependencies when running the compiler. Use of this feature is
602 discouraged and it may be removed at a later date.</dd>
603 <dt><a name="DONT_BUILD_RELINKED"><tt>DONT_BUILD_RELINKED</tt></a></dt>
604 <dd>If set to any value, causes a relinked library (.o) not to be built. By
605 default, libraries are built as re-linked since most LLVM libraries are
606 needed in their entirety and re-linked libraries will be linked more quickly
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]607 than equivalent archive libraries.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]608 <dt><a name="ENABLE_OPTIMIZED"><tt>ENABLE_OPTIMIZED</tt></a></dt>
609 <dd>If set to any value, causes the build to generate optimized objects,
610 libraries and executables. This alters the flags specified to the compilers
611 and linkers. Generally debugging won't be a fun experience with an optimized
612 build.</dd>
613 <dt><a name="ENABLE_PROFILING"><tt>ENABLE_PROFILING</tt></a></dt>
614 <dd>If set to any value, causes the build to generate both optimized and
615 profiled objects, libraries and executables. This alters the flags specified
616 to the compilers and linkers to ensure that profile data can be collected
617 from the tools built. Use the <tt>gprof</tt> tool to analyze the output from
618 the profiled tools (<tt>gmon.out</tt>).</dd>
619 <dt><a name="EXPERIMENTAL_DIRS"><tt>EXPERIMENTAL_DIRS</tt></a></dt>
620 <dd>Specify a set of directories that should be built, but if they fail, it
621 should not cause the build to fail. Note that this should only be used
622 temporarily while code is being written.</dd>
623 <dt><a name="EXPORTED_SYMBOL_FILE"><tt>EXPORTED_SYMBOL_FILE</tt></a></dt>
624 <dd>Specifies the name of a single file that contains a list of the
625 symbols to be exported by the linker. One symbol per line.</dd>
626 <dt><a name="EXPORTED_SYMBOL_LIST"><tt>EXPORTED_SYMBOL_LIST</tt></a></dt>
627 <dd>Specifies a set of symbols to be exported by the linker.</dd>
628 <dt><a name="EXTRA_DIST"><tt>EXTRA_DIST</tt></a></dt>
629 <dd>Specifies additional files that should be distributed with LLVM. All
630 source files, all built sources, all Makefiles, and most documentation files
631 will be automatically distributed. Use this variable to distribute any
632 files that are not automatically distributed.</dd>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]633 <dt><a name="FAKE_SOURCES"><tt>FAKE_SOURCES</tt><small>(optional)</small>
634 </a></dt>
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000[diff] [blame]635 <dd>This variable is like <a href="#SOURCES"><tt>SOURCES</tt></a> except that
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]636 the source files don't need to exist. The makefiles only use
637 <tt>FAKE_SOURCES</tt> to create the names of derived objects that should be
638 included in the directory's result. It is assumed that the project's
639 <tt>Makefile</tt> will define how to build the derived objects
640 necessary.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]641 <dt><a name="KEEP_SYMBOLS"><tt>KEEP_SYMBOLS</tt></a></dt>
642 <dd>If set to any value, specifies that when linking executables the
643 makefiles should retain debug symbols in the executable. Normally, symbols
644 are stripped from the executable.</dd>
Reid Spencer15e4f742004-10-31 17:58:58 +0000[diff] [blame]645 <dt><a name="LEVEL"><tt>LEVEL</tt></a><small>(required)</small></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]646 <dd>Specify the level of nesting from the top level. This variable must be
647 set in each makefile as it is used to find the top level and thus the other
648 makefiles.</dd>
649 <dt><a name="LIBRARYNAME"><tt>LIBRARYNAME</tt></a></dt>
Reid Spencer0b166c42004-10-31 17:56:50 +0000[diff] [blame]650 <dd>Specify the name of the library to be built. (Required For
651 Libraries)</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]652 <dt><a name="LLVMLIBS"><tt>LLVMLIBS</tt></a></dt>
653 <dd>Specifies the set of libraries from the LLVM $(ObjDir) that will be
654 linked into the tool or library.</dd>
Reid Spencer9b81d9c2004-12-05 19:14:31 +0000[diff] [blame]655 <dt><a name="MODULE_NAME"><tt>MODULE_NAME</tt></a></dt>
656 <dd>Specifies the name of a bytecode module to be created. A bytecode
657 module can be specified in conjunction with other kinds of library builds
658 or by itself. It constructs from the sources a single linked bytecode
659 file.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]660 <dt><a name="OPTIONAL_DIRS"><tt>OPTIONAL_DIRS</tt></a></dt>
661 <dd>Specify a set of directories that may be built, if they exist, but its
662 not an error for them not to exist.</dd>
663 <dt><a name="PARALLEL_DIRS"><tt>PARALLEL_DIRS</tt></a></dt>
664 <dd>Specify a set of directories to build recursively and in parallel if
665 the -j option was used with <tt>make</tt>.</dd>
666 <dt><a name="SHARED_LIBRARY"><tt>SHARED_LIBRARY</tt></a></dt>
667 <dd>If set to any value, causes a shared library (.so) to be built in
668 addition to any other kinds of libraries. Note that this option will cause
669 all source files to be built twice: once with options for position
670 independent code and once without. Use it only where you really need a
671 shared library.</dd>
Reid Spencer0b166c42004-10-31 17:56:50 +0000[diff] [blame]672 <dt><a name="SOURCES"><tt>SOURCES</tt><small>(optional)</small></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]673 <dd>Specifies the list of source files in the current directory to be
674 built. Source files of any type may be specified (programs, documentation,
675 config files, etc.). If not specified, the makefile system will infer the
676 set of source files from the files present in the current directory.</dd>
677 <dt><a name="SUFFIXES"><tt>SUFFIXES</tt></a></dt>
678 <dd>Specifies a set of filename suffixes that occur in suffix match rules.
679 Only set this if your local <tt>Makefile</tt> specifies additional suffix
680 match rules.</dd>
681 <dt><a name="TARGET"><tt>TARGET</tt></a></dt>
682 <dd>Specifies the name of the LLVM code generation target that the
683 current directory builds. Setting this variable enables additional rules to
684 build <tt>.inc</tt> files from <tt>.td</tt> files. </dd>
Tanya Lattner54dc8b22004-12-08 18:13:51 +0000[diff] [blame]685 <dt><a name="TESTSUITE"><tt>TESTSUITE</tt></a></dt>
686 <dd>Specifies the directory of tests to run in <tt>llvm/test</tt>.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]687 <dt><a name="TOOLNAME"><tt>TOOLNAME</tt></a></dt>
688 <dd>Specifies the name of the tool that the current directory should
689 build.</dd>
Reid Spencercceed9f2004-11-08 17:32:12 +0000[diff] [blame]690 <dt><a name="TOOL_VERBOSE"><tt>TOOL_VERBOSE</tt></a></dt>
691 <dd>Implies VERBOSE and also tells each tool invoked to be verbose. This is
692 handy when you're trying to see the sub-tools invoked by each tool invoked
693 by the makefile. For example, this will pass <tt>-v</tt> to the GCC
694 compilers which causes it to print out the command lines it uses to invoke
695 sub-tools (compiler, assembler, linker).</dd>
Reid Spencer0b166c42004-10-31 17:56:50 +0000[diff] [blame]696 <dt><a name="USEDLIBS"><tt>USEDLIBS</tt></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]697 <dd>Specifies the list of project libraries that will be linked into the
698 tool or library.</dd>
Reid Spencer0b166c42004-10-31 17:56:50 +0000[diff] [blame]699 <dt><a name="VERBOSE"><tt>VERBOSE</tt></a></dt>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]700 <dd>Tells the Makefile system to produce detailed output of what it is doing
701 instead of just summary comments. This will generate a LOT of output.</dd>
702 </dl>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]703</div>
704
705<!-- ======================================================================= -->
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]706<div class="doc_subsection"><a name="overvars">Override Variables</a></div>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]707<div class="doc_text">
Reid Spencer2734bf72004-10-31 17:51:38 +0000[diff] [blame]708 <p>Override variables can be used to override the default
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]709 values provided by the LLVM makefile system. These variables can be set in
710 several ways:</p>
711 <ul>
712 <li>In the environment (e.g. setenv, export) -- not recommended.</li>
713 <li>On the <tt>make</tt> command line -- recommended.</li>
714 <li>On the <tt>configure</tt> command line</li>
715 <li>In the Makefile (only <em>after</em> the inclusion of <a
Misha Brukman3fecb442004-11-07 22:42:37 +0000[diff] [blame]716 href="#Makefile.common"><tt>$(LEVEL)/Makefile.common</tt></a>).</li>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]717 </ul>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]718 <p>The override variables are given below:</p>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]719 <dl>
720 <dt><a name="AR"><tt>AR</tt></a> <small>(defaulted)</small></dt>
721 <dd>Specifies the path to the <tt>ar</tt> tool.</dd>
722 <dt><a name="BISON"><tt>BISON</tt></a><small>(configured)</small></dt>
723 <dd>Specifies the path to the <tt>bison</tt> tool.</dd>
724 <dt><a name="BUILD_OBJ_DIR"><tt>BUILD_OBJ_DIR</tt></a></dt>
725 <dd>The directory into which the products of build rules will be placed.
726 This might be the same as
727 <a href="#BUILD_SRC_DIR"><tt>BUILD_SRC_DIR</tt></a> but typically is
728 not.</dd>
729 <dt><a name="BUILD_SRC_DIR"><tt>BUILD_SRC_DIR</tt></a></dt>
730 <dd>The directory which contains the source files to be built.</dd>
731 <dt><a name="BURG"><tt>BURG</tt></a></dt>
732 <dd>Specifies the path to the <tt>burg</tt> tool.</dd>
733 <dt><a name="BZIP2"><tt>BZIP2</tt></a><small>(configured)</small></dt>
734 <dd>The path to the <tt>bzip2</tt> tool.</dd>
735 <dt><a name="CC"><tt>CC</tt></a><small>(configured)</small></dt>
736 <dd>The path to the 'C' compiler.</dd>
737 <dt><a name="CFLAGS"><tt>CFLAGS</tt></a></dt>
738 <dd>Additional flags to be passed to the 'C' compiler.</dd>
739 <dt><a name="CXX"><tt>CXX</tt></a></dt>
740 <dd>Specifies the path to the C++ compiler.</dd>
741 <dt><a name="CXXFLAGS"><tt>CXXFLAGS</tt></a></dt>
742 <dd>Additional flags to be passed to the C++ compiler.</dd>
743 <dt><a name="DATE"><tt>DATE<small>(configured)</small></tt></a></dt>
744 <dd>Specifies the path to the <tt>date</tt> program or any program that can
745 generate the current date and time on its standard output</dd>
746 <dt><a name="DOT"><tt>DOT</tt></a><small>(configured)</small></dt>
747 <dd>Specifies the path to the <tt>dot</tt> tool or <tt>false</tt> if there
748 isn't one.</dd>
749 <dt><a name="ECHO"><tt>ECHO</tt></a><small>(configured)</small></dt>
750 <dd>Specifies the path to the <tt>echo</tt> tool for printing output.</dd>
751 <dt><a name="ETAGS"><tt>ETAGS</tt></a><small>(configured)</small></dt>
752 <dd>Specifies the path to the <tt>etags</tt> tool.</dd>
753 <dt><a name="ETAGSFLAGS"><tt>ETAGSFLAGS</tt></a><small>(configured)</small></dt>
754 <dd>Provides flags to be passed to the <tt>etags</tt> tool.</dd>
755 <dt><a name="EXEEXT"><tt>EXEEXT</tt></a><small>(configured)</small></dt>
756 <dd>Provides the extension to be used on executables built by the makefiles.
757 The value may be empty on platforms that do not use file extensions for
758 executables (e.g. Unix).</dd>
759 <dt><a name="FLEX"><tt>FLEX</tt></a><small>(configured)</small></dt>
760 <dd>Specifies the path to the <tt>flex</tt> tool.</dd>
761 <dt><a name="GCCLD"><tt>GCCLD</tt></a><small>(defaulted)</small></dt>
762 <dd>Specifies the path to the <tt>gccld</tt> tool.</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]763 <dt><a name="INSTALL"><tt>INSTALL</tt></a><small>(configured)</small></dt>
764 <dd>Specifies the path to the <tt>install</tt> tool.</dd>
765 <dt><a name="LDFLAGS"><tt>LDFLAGS</tt></a><small>(configured)</small></dt>
766 <dd>Allows users to specify additional flags to pass to the linker.</dd>
767 <dt><a name="LIBS"><tt>LIBS</tt></a><small>(configured)</small></dt>
768 <dd>The list of libraries that should be linked with each tool.</dd>
769 <dt><a name="LIBTOOL"><tt>LIBTOOL</tt></a><small>(configured)</small></dt>
770 <dd>Specifies the path to the <tt>libtool</tt> tool. This tool is renamed
771 <tt>mklib</tt> by the <tt>configure</tt> script and always located in the
772 <dt><a name="LLVMAS"><tt>LLVMAS</tt></a><small>(defaulted)</small></dt>
773 <dd>Specifies the path to the <tt>llvm-as</tt> tool.</dd>
774 <dt><a name="LLVMGCC"><tt>LLVMGCC</tt></a><small>(defaulted)</small></dt>
775 <dd>Specifies the path to the LLVM version of the GCC 'C' Compiler</dd>
776 <dt><a name="LLVMGXX"><tt>LLVMGXX</tt></a><small>(defaulted)</small></dt>
777 <dd>Specifies the path to the LLVM version of the GCC C++ Compiler</dd>
778 <dt><a name="LLVM_OBJ_ROOT"><tt>LLVM_OBJ_ROOT</tt></a><small>(configured)</small></dt>
779 <dd>Specifies the top directory into which the output of the build is
780 placed.</dd>
781 <dt><a name="LLVM_SRC_ROOT"><tt>LLVM_SRC_ROOT</tt></a><small>(configured)</small></dt>
782 <dd>Specifies the top directory in which the sources are found.</dd>
783 <dt><a name="LLVM_TARBALL_NAME"><tt>LLVM_TARBALL_NAME</tt></a><small>(configured)</small></dt>
784 <dd>Specifies the name of the distribution tarball to create. This is
785 configured from the name of the project and its version number.</dd>
786 <dt><a name="MKDIR"><tt>MKDIR</tt></a><small>(defaulted)</small></dt>
787 <dd>Specifies the path to the <tt>mkdir</tt> tool that creates
788 directories.</dd>
789 <dt><a name="PLATFORMSTRIPOPTS"><tt>PLATFORMSTRIPOPTS</tt></a></dt>
790 <dd>The options to provide to the linker to specify that a stripped (no
791 symbols) executable should be built.</dd>
792 <dt><a name="RANLIB"><tt>RANLIB</tt></a><small>(defaulted)</small></dt>
793 <dd>Specifies the path to the <tt>ranlib</tt> tool.</dd>
794 <dt><a name="RM"><tt>RM</tt></a><small>(defaulted)</small></dt>
795 <dd>Specifies the path to the <tt>rm</tt> tool.</dd>
796 <dt><a name="SED"><tt>SED</tt></a><small>(defaulted)</small></dt>
797 <dd>Specifies the path to the <tt>sed</tt> tool.</dd>
798 <dt><a name="SHLIBEXT"><tt>SHLIBEXT</tt></a><small>(configured)</small></dt>
799 <dd>Provides the filename extension to use for shared libraries.</dd>
800 <dt><a name="TBLGEN"><tt>TBLGEN</tt></a><small>(defaulted)</small></dt>
801 <dd>Specifies the path to the <tt>tblgen</tt> tool.</dd>
802 <dt><a name="TAR"><tt>TAR</tt></a><small>(defaulted)</small></dt>
803 <dd>Specifies the path to the <tt>tar</tt> tool.</dd>
804 <dt><a name="ZIP"><tt>ZIP</tt></a><small>(defaulted)</small></dt>
805 <dd>Specifies the path to the <tt>zip</tt> tool.</dd>
806 </dl>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]807</div>
808
809<!-- ======================================================================= -->
810<div class="doc_subsection"><a name="getvars">Readable Variables</a></div>
811<div class="doc_text">
812 <p>Variables listed in the table below can be used by the user's Makefile but
813 should not be changed. Changing the value will generally cause the build to go
814 wrong, so don't do it.</p>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]815 <dl>
816 <dt><a name="bindir"><tt>bindir</tt></a></dt>
817 <dd>The directory into which executables will ultimately be installed. This
818 value is derived from the <tt>--prefix</tt> option given to
819 <tt>configure</tt>.</dd>
Reid Spencer632bd062004-11-01 07:53:17 +0000[diff] [blame]820 <dt><a name="BuildMode"><tt>BuildMode</tt></a></dt>
821 <dd>The name of the type of build being performed: Debug, Release, or
822 Profile</dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]823 <dt><a name="bytecode_libdir"><tt>bytecode_libdir</tt></a></dt>
824 <dd>The directory into which bytecode libraries will ultimately be installed.
825 This value is derived from the <tt>--prefix</tt> option given to
826 <tt>configure</tt>.</dd>
827 <dt><a name="ConfigureScriptFLAGS"><tt>ConfigureScriptFLAGS</tt></a></dt>
828 <dd>Additional flags given to the <tt>configure</tt> script when
829 reconfiguring.</dd>
830 <dt><a name="DistDir"><tt>DistDir</tt></a></dt>
831 <dd>The <em>current</em> directory for which a distribution copy is being
832 made.</dd>
833 <dt><a name="Echo"><tt>Echo</tt></a></dt>
834 <dd>The LLVM Makefile System output command. This provides the
835 <tt>llvm[n]</tt> prefix and starts with @ so the command itself is not
836 printed by <tt>make</tt>.</dd>
837 <dt><a name="EchoCmd"><tt>EchoCmd</tt></a></dt>
838 <dd> Same as <a href="#Echo"><tt>Echo</tt></a> but without the leading @.
839 </dd>
840 <dt><a name="includedir"><tt>includedir</tt></a></dt>
841 <dd>The directory into which include files will ultimately be installed.
842 This value is derived from the <tt>--prefix</tt> option given to
843 <tt>configure</tt>.</dd>
844 <dt><a name="libdir"><tt>libdir</tt></a></dt><dd></dd>
845 <dd>The directory into which native libraries will ultimately be installed.
846 This value is derived from the <tt>--prefix</tt> option given to
847 <tt>configure</tt>.</dd>
848 <dt><a name="LibDir"><tt>LibDir</tt></a></dt>
849 <dd>The configuration specific directory into which libraries are placed
850 before installation.</dd>
851 <dt><a name="MakefileConfig"><tt>MakefileConfig</tt></a></dt>
852 <dd>Full path of the <tt>Makefile.config</tt> file.</dd>
853 <dt><a name="MakefileConfigIn"><tt>MakefileConfigIn</tt></a></dt>
854 <dd>Full path of the <tt>Makefile.config.in</tt> file.</dd>
855 <dt><a name="ObjDir"><tt>ObjDir</tt></a></dt>
856 <dd>The configuration and directory specific directory where build objects
857 (compilation results) are placed.</dd>
858 <dt><a name="SubDirs"><tt>SubDirs</tt></a></dt>
859 <dd>The complete list of sub-directories of the current directory as
860 specified by other variables.</dd>
861 <dt><a name="Sources"><tt>Sources</tt></a></dt>
862 <dd>The complete list of source files.</dd>
863 <dt><a name="sysconfdir"><tt>sysconfdir</tt></a></dt>
John Criswell8b88b462004-11-21 15:11:37 +0000[diff] [blame]864 <dd>The directory into which configuration files will ultimately be
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]865 installed. This value is derived from the <tt>--prefix</tt> option given to
866 <tt>configure</tt>.</dd>
867 <dt><a name="ToolDir"><tt>ToolDir</tt></a></dt>
868 <dd>The configuration specific directory into which executables are placed
869 before they are installed.</dd>
870 <dt><a name="TopDistDir"><tt>TopDistDir</tt></a></dt>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]871 <dd>The top most directory into which the distribution files are copied.
872 </dd>
Reid Spencera79e58c2004-10-30 21:39:42 +0000[diff] [blame]873 <dt><a name="Verb"><tt>Verb</tt></a></dt>
874 <dd>Use this as the first thing on your build script lines to enable or
875 disable verbose mode. It expands to either an @ (quiet mode) or nothing
876 (verbose mode). </dd>
877 </dl>
878</div>
879
880<!-- ======================================================================= -->
881<div class="doc_subsection"><a name="intvars">Internal Variables</a></div>
882<div class="doc_text">
883 <p>Variables listed below are used by the LLVM Makefile System
884 and considered internal. You should not use these variables under any
885 circumstances.</p>
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]886 <p><tt>
887 Archive
888 AR.Flags
889 BaseNameSources
890 BCCompile.C
891 BCCompile.CXX
892 BCLinkLib
893 Burg
894 C.Flags
895 Compile.C
896 CompileCommonOpts
897 Compile.CXX
898 ConfigStatusScript
899 ConfigureScript
900 CPP.Flags
901 CPP.Flags
902 CXX.Flags
903 DependFiles
904 DestArchiveLib
905 DestBytecodeLib
906 DestModule
907 DestRelinkedLib
908 DestSharedLib
909 DestTool
910 DistAlways
911 DistCheckDir
912 DistCheckTop
913 DistFiles
914 DistName
915 DistOther
916 DistSources
917 DistSubDirs
918 DistTarBZ2
919 DistTarGZip
920 DistZip
921 ExtraLibs
922 FakeSources
923 INCFiles
924 InternalTargets
925 LD.Flags
926 LexFiles
927 LexOutput
928 LibName.A
929 LibName.BC
930 LibName.LA
931 LibName.O
932 LibTool.Flags
933 Link
934 LinkModule
Reid Spencerd8489c72004-12-06 05:35:25 +0000[diff] [blame]935 LLVMLibDir
936 LLVMLibsOptions
937 LLVMLibsPaths
938 LLVMToolDir
939 LLVMUsedLibs
940 LocalTargets
941 LTCompile.C
942 LTCompile.CXX
943 LTInstall
944 Module
945 ObjectsBC
946 ObjectsLO
947 ObjectsO
948 ObjMakefiles
949 ParallelTargets
950 PreConditions
951 ProjLibsOptions
952 ProjLibsPaths
953 ProjUsedLibs
954 Ranlib
955 RecursiveTargets
956 Relink
957 SrcMakefiles
958 Strip
959 StripWarnMsg
960 TableGen
961 TDFiles
962 ToolBuildPath
963 TopLevelTargets
964 UserTargets
965 YaccFiles
966 YaccOutput
967 </tt></p>
Reid Spencer504b21a2004-10-23 07:57:22 +0000[diff] [blame]968</div>
969
970<!-- *********************************************************************** -->
971<hr>
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977
978 <a href="mailto:rspencer@x10sys.com">Reid Spencer</a><br>
979 <a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a><br>
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