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10 <div class="doc_title">LLVM Makefile Guide</div>
13 <li><a href="#introduction">Introduction</a></li>
14 <li><a href="#general">General Concepts</a>
16 <li><a href="#projects">Projects</a></li>
17 <li><a href="#Makefile">Makefile</a></li>
18 <li><a href="#Makefile.common">Makefile.common</a></li>
19 <li><a href="#Makefile.config">Makefile.config</a></li>
20 <li><a href="#Makefile.rules">Makefile.rules</a></li>
21 <li><a href="#Comments">Comments</a></li>
24 <li><a href="#targets">Targets Supported</a>
26 <li><a href="#all">all</a></li>
27 <li><a href="#all-local">all-local</a></li>
28 <li><a href="#check">check</a></li>
29 <li><a href="#check-local">check-local</a></li>
30 <li><a href="#clean">clean</a></li>
31 <li><a href="#clean-local">clean-local</a></li>
32 <li><a href="#dist">dist</a></li>
33 <li><a href="#dist-check">dist-check</a></li>
34 <li><a href="#dist-clean">dist-clean</a></li>
35 <li><a href="#install">install</a></li>
36 <li><a href="#printvars">printvars</a></li>
37 <li><a href="#tags">tags</a></li>
38 <li><a href="#uninstall">uninstall</a></li>
41 <li><a href="#variables">Using Variables</a>
43 <li><a href="#setvars">Control Variables</a></li>
44 <li><a href="#overvars">Override Variables</a></li>
45 <li><a href="#getvars">Readable Variables</a></li>
46 <li><a href="#intvars">Internal Variables</a></li>
51 <div class="doc_author">
52 <p>Written by <a href="mailto:reid@x10sys.com">Reid Spencer</a></p>
55 <!-- *********************************************************************** -->
56 <div class="doc_section"><a name="introduction">Introduction </a></div>
57 <!-- *********************************************************************** -->
59 <div class="doc_text">
60 <p>This document provides <em>usage</em> information about the LLVM makefile
61 system. While loosely patterned after the BSD makefile system, LLVM has taken
62 a departure from BSD in order to implement additional features needed by LLVM.
64 <p>Although makefile systems such as automake were attempted at one point, it
65 has become clear that the differences between the LLVM way of doing things and
66 the Makefile norm are too great to use a more limited tool. Consequently, LLVM requires
67 simply GNU Make 3.79, a widely portably makefile processor. LLVM unabashedly
68 makes heavy use of the features of GNU Make so the dependency on GNU Make is
69 firm. If you're not familiar with <tt>make</tt>, it is recommended that you
70 read the <a href="http://www.gnu.org/software/make/manual/make.html">
71 GNU Makefile Manual</a>.</p>
72 <p>While this document is rightly part of the
73 <a href="ProgrammersManual.html">LLVM Programmer's Manual</a>, it is treated
74 separately here because of the volume of content and because it is often an
75 early source of bewilderment for new developers.</p>
78 <!-- *********************************************************************** -->
79 <div class="doc_section"><a name="general">General Concepts</a></div>
80 <!-- *********************************************************************** -->
82 <div class="doc_text">
83 <p>The LLVM makefile system is the component of LLVM that is responsible for
84 building the software, testing it, generating distributions, rpms and other
85 packages, installing and uninstalling, etc.</p>
88 <!-- ======================================================================= -->
89 <div class="doc_subsection"><a name="projects">Projects</a></div>
90 <div class="doc_text">
91 <p>The LLVM Makefile System is quite generous. It not only builds its own
92 software, but it can build yours too. Built into the system is knowledge of
93 the <tt>llvm/projects</tt> directory. Any directory under <tt>projects</tt>
94 that has both a <tt>configure</tt> script and a <tt>Makefile</tt> is assumed
95 to be a project that uses the LLVM Makefile system. This allows your project
96 to get up and running quickly by utilizing the built-in features that are used
100 <!-- ======================================================================= -->
101 <div class="doc_subsection"><a name="Makefile">Makefile</a></div>
102 <div class="doc_text">
103 <p>Each directory to participate in the build needs to have a file named
104 <tt>Makefile</tt>. This is the file first read by <tt>make</tt>. It has three
107 <li><a href="setvars">Settable Variables</a> - Required that must be set
109 <li><a href="Makefile.common">include <tt>$(LEVEL)/Makefile.common</tt></a>
110 - include the LLVM Makefile system.
111 <li><a href="overvars">Overridable Variables</a> - Override variables set by
112 the LLVM Makefile system.
116 <!-- ======================================================================= -->
117 <div class="doc_subsection"><a name="Makefile.common">Makefile.common</a></div>
118 <div class="doc_text">
119 <p>Every project must have a <tt>Makefile.common</tt> file at its top source
120 directory. This file serves three purposes:</p>
122 <li>It includes the project's configuration makefile to obtain values
123 determined by the <tt>configure</tt> script. This is done by including the
124 <a href="Makefile.config"><tt>$(LEVEL)/Makefile.config</tt></a> file.</li>
125 <li>It specifies any other (static) values that are needed throughout the
126 project. Only values that are used in all or a large proportion of the
127 project's directories should be placed here.</li>
128 <li>It include's the standard rules for the LLVM Makefile system,
129 <a href="Makefile.rules"><tt>$(LLVM_SRC_ROOT)/Makefile.rules</tt></a>.
130 This file is the "guts" of the LLVM Makefile system.</li>
134 <!-- ======================================================================= -->
135 <div class="doc_subsection"><a name="Makefile.config">Makefile.config</a></div>
136 <div class="doc_text">
137 <p>Every project must have a <tt>Makefile.config</tt> at the top of its
138 <em>build</em> directory. This file is <b>generated</b> by the
139 <tt>configure</tt> script from the pattern provided by the
140 <tt>Makefile.config.in</tt> file located at the top of the project's
141 <em>source</em> directory. The contents of this file depend largely on what
142 configuration items the project uses, however most projects can get what they
143 need by just relying on LLVM's configuration found in
144 <tt>$(LLVM_OBJ_ROOT)/Makefile.config</tt>.
147 <!-- ======================================================================= -->
148 <div class="doc_subsection"><a name="Makefile.rules">Makefile.rules</a></div>
149 <div class="doc_text">
150 <p>This file, located at <tt>$(LLVM_SRC_ROOT)/Makefile.rules</tt> is the heart
151 of the LLVM Makefile System. It provides all the logic, dependencies, and
152 rules for building the targets supported by the system. What it does largely
153 depends on the values of <tt>make</tt> <a href="variables">variables</a> that
154 have been set <em>before</em> <tt>Makefile.rules</tt> is included.
157 <!-- ======================================================================= -->
158 <div class="doc_subsection"><a name="Comments">Comments</a></div>
159 <div class="doc_text">
160 <p>User Makefiles need not have comments in them unless the construction is
161 unusual or it doesn't strictly follow the rules and patterns of the LLVM
162 makefile system. Makefile comments are invoked with the pound (#) character.
163 The # character and any text following it, to the end of the line, are ignored
164 by <tt>make</tt>.</p>
167 <!-- *********************************************************************** -->
168 <div class="doc_section"><a name="targets">Targets Supported</a></div>
169 <!-- *********************************************************************** -->
171 <div class="doc_text">
172 <p>This section describes each of the targets that can be built using the LLVM
173 Makefile system. Any target can be invoked from any directory but not all are
174 applicable to a given directory (e.g. "dist" and "install" will always operate
175 as if invoked from the top level directory).</p>
177 <table style="text-align:left">
178 <tr><th>Target Name</th><th>Implied Targets</th><th>Target Description</th></tr>
179 <tr><td><a href="#all"><tt>all</tt></a></td><td></td>
180 <td>Compile the software recursively. Default target.
182 <tr><td><a href="#all-local"><tt>all-local</tt></a></td><td></td>
183 <td>Compile the software in the local directory only.
185 <tr><td><a href="#check"><tt>check</tt></a></td><td>all</td>
186 <td>Test the software recursively.
188 <tr><td><a href="#check-local"><tt>check-local</tt></a></td><td>all-local</td>
189 <td>Test the software in the local directory only.
191 <tr><td><a href="#clean"><tt>clean</tt></a></td><td></td>
192 <td>Remove built objects recursively.
194 <tr><td><a href="#clean-local"><tt>clean-local</tt></a></td><td></td>
195 <td>Remove built objects from the local directory only.
197 <tr><td><a href="#dist"><tt>dist</tt></a></td><td>all</td>
198 <td>Prepare a source distribution tarball.
200 <tr><td><a href="#dist-check"><tt>dist-check</tt></a></td><td>all check</td>
201 <td>Prepare a source distribution tarball and check that it builds.
203 <tr><td><a href="#dist-clean"><tt>dist-clean</tt></a></td><td>clean</td>
204 <td>Clean source distribution tarball temporary files.
206 <tr><td><a href="#install"><tt>install</tt></a></td><td>all</td>
207 <td>Copy built objects to installation directory.
209 <tr><td><a href="#printvars"><tt>printvars</tt></a></td><td>all</td>
210 <td>Prints variables defined by the makefile system (for debugging).
212 <tr><td><a href="#tags"><tt>tags</tt></a></td><td></td>
213 <td>Make C and C++ tags files for emacs and vi.
215 <tr><td><a href="#uninstall"><tt>uninstall</tt></a></td><td></td>
216 <td>Remove built objects from installation directory.
221 <!-- ======================================================================= -->
222 <div class="doc_subsection"><a name="all">all (default)</a></div>
223 <div class="doc_text">
224 <p>When you invoke <tt>make</tt> with no arguments, you are implicitly
225 instructing it to seek the "all" target (goal). This target is used for
226 building the software recursively and will do different things in different
227 directories. For example, in a <tt>lib</tt> directory, the "all" target will
228 compile source files and generate libraries. But, in a <tt>tools</tt>
229 directory, it will link libraries and generate executables.</p>
232 <!-- ======================================================================= -->
233 <div class="doc_subsection"><a name="all-local">all-local</a></div>
234 <div class="doc_text">
235 <p>This target is the same as <a href="#all">all</a> but it operates only on
236 the current directory instead of recursively.</p>
239 <!-- ======================================================================= -->
240 <div class="doc_subsection"><a name="check">check</a></div>
241 <div class="doc_text">
242 <p>This target is used to perform any functional, unit or sanity tests as the
243 software is being built. The <tt>check</tt> target depends on the
244 <a href="#all"><tt>all</tt></a> target so the software is built in each
245 directory first and then the "check" is applied.</p>
246 <p>The definition of "check" is pretty general. It depends on the value of the
247 <a href="#TESTS"><tt>TESTS</tt></a> variable. This variable should be set to a
248 list of executables to run in order to test the software. If they all return
249 0 then the check succeeds, otherwise not. The programs run can be anything but
250 they should either be local to the directory or in your path.</p>
253 <!-- ======================================================================= -->
254 <div class="doc_subsection"><a name="check-local">check-local</a></div>
255 <div class="doc_text">
256 <p>This target does the same thing as <tt>check</tt> but only for the current
257 (local) directory.</p>
260 <!-- ======================================================================= -->
261 <div class="doc_subsection"><a name="clean">clean</a></div>
262 <div class="doc_text">
263 <p>This target cleans the build directory, recursively removing all things
264 that the Makefile builds. Despite once or twice attempting to remove /*, the
265 cleaning rules have been made guarded so they shouldn't go awry.</p>
268 <!-- ======================================================================= -->
269 <div class="doc_subsection"><a name="clean-local">clean-local</a></div>
270 <div class="doc_text">
271 <p>This target does the same thing as <tt>clean</tt> but only for the current
272 (local) directory.</p>
275 <!-- ======================================================================= -->
276 <div class="doc_subsection"><a name="dist">dist</a></div>
277 <div class="doc_text">
278 <p>This target builds a distribution tarball. It first builds the entire
279 project using the <tt>all</tt> target and then tars up the necessary files and
280 compresses it. The generated tarball is sufficient for a casual source
281 distribution, but probably not for a release (see <tt>dist-check</tt>).</p>
284 <!-- ======================================================================= -->
285 <div class="doc_subsection"><a name="dist-check">dist-check</a></div>
286 <div class="doc_text">
287 <p>This target does the same thing as the <tt>dist</tt> target but also checks
288 the distribution tarball. The check is made by unpacking the tarball to a new
289 directory, configuring it, building it, installing it, and then verifying that
290 the installation results are correct (by comparing to the original build).
291 This target can take a long time to run but should be done before a release
292 goes out to make sure that the distributed tarball can actually be built into
293 a working release.</p>
296 <!-- ======================================================================= -->
297 <div class="doc_subsection"><a name="dist-clean">dist-clean</a></div>
298 <div class="doc_text">
299 <p>This is a special form of the <tt>clean</tt> clean target. It performs a
300 normal <tt>clean</tt> but also removes things pertaining to building the
304 <!-- ======================================================================= -->
305 <div class="doc_subsection"><a name="install">install</a></div>
306 <div class="doc_text">
307 <p>This target finalizes shared objects and executables and copies all
308 libraries, headers and executables to the directory given with the
309 <tt>--prefix</tt> option to <tt>configure</tt>. When completed, the prefix
310 directory will have everything needed to <b>use</b> LLVM. </p>
313 <!-- ======================================================================= -->
314 <div class="doc_subsection"><a name="printvars">printvars</a></div>
315 <div class="doc_text">
316 <p>This utility target just causes LLVM to print out some of its variables so
317 that you can double check how things are set. </p>
320 <!-- ======================================================================= -->
321 <div class="doc_subsection"><a name="tags">tags</a></div>
322 <div class="doc_text">
323 <p>This target will generate a <tt>TAGS</tt> file in the top-level source
324 directory. It is meant for use with emacs, XEmacs, or ViM. The TAGS file
325 provides an index of symbol definitions so that the editor can jump you to the
326 definition quickly. </p>
329 <!-- ======================================================================= -->
330 <div class="doc_subsection"><a name="uninstall">uninstall</a></div>
331 <div class="doc_text">
332 <p>This target is the opposite of the <tt>install</tt> target. It removes the
333 header, library and executable files from the installation directories. Note
334 that the directories themselves are not removed because it is not guaranteed
335 that LLVM is the only thing installing there (e.g. --prefix=/usr).</p>
338 <!-- *********************************************************************** -->
339 <div class="doc_section"><a name="variables">Variables</a></div>
340 <!-- *********************************************************************** -->
341 <div class="doc_text">
342 <p>Variables are used to tell the LLVM Makefile System what to do and to
343 obtain information from it. Variables are also used internally by the LLVM
344 Makefile System. Variable names that contain only the upper case alphabetic
345 letters and underscore are intended for use by the end user. All other
346 variables are internal to the LLVM Makefile System and should not be relied
347 upon nor modified. The sections below describe how to use the LLVM Makefile
351 <!-- ======================================================================= -->
352 <div class="doc_subsection"><a name="setvars">Control Variables</a></div>
353 <div class="doc_text">
354 <p>Variables listed in the table below should be set <em>before</em> the
355 inclusion of <a href="Makefile.common"><tt>$(LEVEL)/Makefile.common</tt></a>.
356 These variables provide input to the LLVM make system that tell it what to do
357 for the current directory.</p>
359 <dt><a name="BUILD_ARCHIVE"><tt>BUILD_ARCHIVE</tt></a></dt>
360 <dd>If set to any value, causes an archive (.a) library to be built.</dd>
361 <dt><a name="BUILT_SOURCES"><tt>BUILT_SOURCES</tt></a></dt>
362 <dd>Specifies a set of source files that are generated from other source
363 files. These sources will be built before any other target processing to
364 ensure they are present.</td>
365 <dt><a name="BYTECODE_LIBRARY"><tt>BYTECODE_LIBRARY</tt></a></dt>
366 <dd>If set to any value, causes a bytecode library (.bc) to be built.</dd>
367 <dt><a name="CONFIG_FILES"><tt>CONFIG_FILES</tt></a></dt>
368 <dd>Specifies a set of configuration files to be installed.</dd>
369 <dt><a name="DIRS"><tt>DIRS</tt></a></dt>
370 <dd>Specifies a set of directories, usually children of the current
371 directory, that should also be made using the same goal. These directories
372 will be built serially.</dd>
373 <dt><a name="DISABLE_AUTO_DEPENDENCIES"><tt>DISABLE_AUTO_DEPENDENCIES</tt></a></dt>
374 <dd>If set to any value, causes the makefiles to <b>not</b> automatically
375 generate dependencies when running the compiler. Use of this feature is
376 discouraged and it may be removed at a later date.</dd>
377 <dt><a name="DONT_BUILD_RELINKED"><tt>DONT_BUILD_RELINKED</tt></a></dt>
378 <dd>If set to any value, causes a relinked library (.o) not to be built. By
379 default, libraries are built as re-linked since most LLVM libraries are
380 needed in their entirety and re-linked libraries will be linked more quickly
381 than equival archive libraries.</dd>
382 <dt><a name="ENABLE_OPTIMIZED"><tt>ENABLE_OPTIMIZED</tt></a></dt>
383 <dd>If set to any value, causes the build to generate optimized objects,
384 libraries and executables. This alters the flags specified to the compilers
385 and linkers. Generally debugging won't be a fun experience with an optimized
387 <dt><a name="ENABLE_PROFILING"><tt>ENABLE_PROFILING</tt></a></dt>
388 <dd>If set to any value, causes the build to generate both optimized and
389 profiled objects, libraries and executables. This alters the flags specified
390 to the compilers and linkers to ensure that profile data can be collected
391 from the tools built. Use the <tt>gprof</tt> tool to analyze the output from
392 the profiled tools (<tt>gmon.out</tt>).</dd>
393 <dt><a name="EXPERIMENTAL_DIRS"><tt>EXPERIMENTAL_DIRS</tt></a></dt>
394 <dd>Specify a set of directories that should be built, but if they fail, it
395 should not cause the build to fail. Note that this should only be used
396 temporarily while code is being written.</dd>
397 <dt><a name="EXPORTED_SYMBOL_FILE"><tt>EXPORTED_SYMBOL_FILE</tt></a></dt>
398 <dd>Specifies the name of a single file that contains a list of the
399 symbols to be exported by the linker. One symbol per line.</dd>
400 <dt><a name="EXPORTED_SYMBOL_LIST"><tt>EXPORTED_SYMBOL_LIST</tt></a></dt>
401 <dd>Specifies a set of symbols to be exported by the linker.</dd>
402 <dt><a name="EXTRA_DIST"><tt>EXTRA_DIST</tt></a></dt>
403 <dd>Specifies additional files that should be distributed with LLVM. All
404 source files, all built sources, all Makefiles, and most documentation files
405 will be automatically distributed. Use this variable to distribute any
406 files that are not automatically distributed.</dd>
407 <dt><a name="KEEP_SYMBOLS"><tt>KEEP_SYMBOLS</tt></a></dt>
408 <dd>If set to any value, specifies that when linking executables the
409 makefiles should retain debug symbols in the executable. Normally, symbols
410 are stripped from the executable.</dd>
411 <dt><a name="LEVEL"><tt>LEVEL</tt></a><small>(required)</dt>
412 <dd>Specify the level of nesting from the top level. This variable must be
413 set in each makefile as it is used to find the top level and thus the other
415 <dt><a name="LIBRARYNAME"><tt>LIBRARYNAME</tt></a></dt>
416 <dd>Specify the name of the library to be built. (Required For Libraries)</dd>
417 <a href="#BUILD_OBJ_DIR"><tt>BUILD_OBJ_DIR<tt></a> directory.</dd>
418 <dt><a name="LLVMLIBS"><tt>LLVMLIBS</tt></a></dt>
419 <dd>Specifies the set of libraries from the LLVM $(ObjDir) that will be
420 linked into the tool or library.</dd>
421 <dt><a name="OPTIONAL_DIRS"><tt>OPTIONAL_DIRS</tt></a></dt>
422 <dd>Specify a set of directories that may be built, if they exist, but its
423 not an error for them not to exist.</dd>
424 <dt><a name="PARALLEL_DIRS"><tt>PARALLEL_DIRS</tt></a></dt>
425 <dd>Specify a set of directories to build recursively and in parallel if
426 the -j option was used with <tt>make</tt>.</dd>
427 <dt><a name="SHARED_LIBRARY"><tt>SHARED_LIBRARY</tt></a></dt>
428 <dd>If set to any value, causes a shared library (.so) to be built in
429 addition to any other kinds of libraries. Note that this option will cause
430 all source files to be built twice: once with options for position
431 independent code and once without. Use it only where you really need a
433 <dt><a name="SOURCES"><tt>SOURCES</tt><small>(optional)</small></a></td>
434 <dd>Specifies the list of source files in the current directory to be
435 built. Source files of any type may be specified (programs, documentation,
436 config files, etc.). If not specified, the makefile system will infer the
437 set of source files from the files present in the current directory.</dd>
438 <dt><a name="SUFFIXES"><tt>SUFFIXES</tt></a></dt>
439 <dd>Specifies a set of filename suffixes that occur in suffix match rules.
440 Only set this if your local <tt>Makefile</tt> specifies additional suffix
442 <dt><a name="TARGET"><tt>TARGET</tt></a></dt>
443 <dd>Specifies the name of the LLVM code generation target that the
444 current directory builds. Setting this variable enables additional rules to
445 build <tt>.inc</tt> files from <tt>.td</tt> files. </dd>
446 <dt><a name="TOOLNAME"><tt>TOOLNAME</tt></a></dt>
447 <dd>Specifies the name of the tool that the current directory should
449 <dt><a name="USEDLIBS"><tt>USEDLIBS</tt></a></td>
450 <dd>Specifies the list of project libraries that will be linked into the
451 tool or library.</dd>
452 <dt><a name="VERBOSE"><tt>VERBOSE</tt></a></td>
453 <dd>Tells the Makefile system to produce detailed output of what it is doing
454 instead of just summary comments. This will generate a LOT of output.</dd>
458 <!-- ======================================================================= -->
459 <div class="doc_subsection"><a name="overvars">Overridable Variables</a></div>
460 <div class="doc_text">
461 <p>Overridable variables can be used to override the default
462 values provided by the LLVM makefile system. These variables can be set in
465 <li>In the environment (e.g. setenv, export) -- not recommended.</li>
466 <li>On the <tt>make</tt> command line -- recommended.</li>
467 <li>On the <tt>configure</tt> command line</li>
468 <li>In the Makefile (only <em>after</em> the inclusion of <a
469 href="Makefile.common"><tt>$(LEVEL)/Makefile.common</tt></a>.</li>
471 <p>The overridable variables are given below:</p>
473 <dt><a name="AR"><tt>AR</tt></a> <small>(defaulted)</small></dt>
474 <dd>Specifies the path to the <tt>ar</tt> tool.</dd>
475 <dt><a name="BISON"><tt>BISON</tt></a><small>(configured)</small></dt>
476 <dd>Specifies the path to the <tt>bison</tt> tool.</dd>
477 <dt><a name="BUILD_OBJ_DIR"><tt>BUILD_OBJ_DIR</tt></a></dt>
478 <dd>The directory into which the products of build rules will be placed.
479 This might be the same as
480 <a href="#BUILD_SRC_DIR"><tt>BUILD_SRC_DIR</tt></a> but typically is
482 <dt><a name="BUILD_SRC_DIR"><tt>BUILD_SRC_DIR</tt></a></dt>
483 <dd>The directory which contains the source files to be built.</dd>
484 <dt><a name="BURG"><tt>BURG</tt></a></dt>
485 <dd>Specifies the path to the <tt>burg</tt> tool.</dd>
486 <dt><a name="BZIP2"><tt>BZIP2</tt></a><small>(configured)</small></dt>
487 <dd>The path to the <tt>bzip2</tt> tool.</dd>
488 <dt><a name="CC"><tt>CC</tt></a><small>(configured)</small></dt>
489 <dd>The path to the 'C' compiler.</dd>
490 <dt><a name="CFLAGS"><tt>CFLAGS</tt></a></dt>
491 <dd>Additional flags to be passed to the 'C' compiler.</dd>
492 <dt><a name="CXX"><tt>CXX</tt></a></dt>
493 <dd>Specifies the path to the C++ compiler.</dd>
494 <dt><a name="CXXFLAGS"><tt>CXXFLAGS</tt></a></dt>
495 <dd>Additional flags to be passed to the C++ compiler.</dd>
496 <dt><a name="DATE"><tt>DATE<small>(configured)</small></tt></a></dt>
497 <dd>Specifies the path to the <tt>date</tt> program or any program that can
498 generate the current date and time on its standard output</dd>
499 <dt><a name="DOT"><tt>DOT</tt></a><small>(configured)</small></dt>
500 <dd>Specifies the path to the <tt>dot</tt> tool or <tt>false</tt> if there
502 <dt><a name="ECHO"><tt>ECHO</tt></a><small>(configured)</small></dt>
503 <dd>Specifies the path to the <tt>echo</tt> tool for printing output.</dd>
504 <dt><a name="ETAGS"><tt>ETAGS</tt></a><small>(configured)</small></dt>
505 <dd>Specifies the path to the <tt>etags</tt> tool.</dd>
506 <dt><a name="ETAGSFLAGS"><tt>ETAGSFLAGS</tt></a><small>(configured)</small></dt>
507 <dd>Provides flags to be passed to the <tt>etags</tt> tool.</dd>
508 <dt><a name="EXEEXT"><tt>EXEEXT</tt></a><small>(configured)</small></dt>
509 <dd>Provides the extension to be used on executables built by the makefiles.
510 The value may be empty on platforms that do not use file extensions for
511 executables (e.g. Unix).</dd>
512 <dt><a name="FLEX"><tt>FLEX</tt></a><small>(configured)</small></dt>
513 <dd>Specifies the path to the <tt>flex</tt> tool.</dd>
514 <dt><a name="GCCLD"><tt>GCCLD</tt></a><small>(defaulted)</small></dt>
515 <dd>Specifies the path to the <tt>gccld</tt> tool.</dd>
516 <dt><a name="HAVE_BZIP2"><tt>HAVE_BZIP2</tt></a><small>(configured)</small></dt>
517 <dd>This variable is set automatically if the <tt>configure</tt> script
518 could find the bzip2 library.</dd>
519 <dt><a name="HAVE_ZLIB"><tt>HAVE_ZLIB</tt></a><small>(configured)</small></dt>
520 <dd>This variable is set automatically if the <tt>configure</tt> script
521 could find the zlib library.</dd>
522 <dt><a name="INSTALL"><tt>INSTALL</tt></a><small>(configured)</small></dt>
523 <dd>Specifies the path to the <tt>install</tt> tool.</dd>
524 <dt><a name="LDFLAGS"><tt>LDFLAGS</tt></a><small>(configured)</small></dt>
525 <dd>Allows users to specify additional flags to pass to the linker.</dd>
526 <dt><a name="LIBS"><tt>LIBS</tt></a><small>(configured)</small></dt>
527 <dd>The list of libraries that should be linked with each tool.</dd>
528 <dt><a name="LIBTOOL"><tt>LIBTOOL</tt></a><small>(configured)</small></dt>
529 <dd>Specifies the path to the <tt>libtool</tt> tool. This tool is renamed
530 <tt>mklib</tt> by the <tt>configure</tt> script and always located in the
531 <dt><a name="LLVMAS"><tt>LLVMAS</tt></a><small>(defaulted)</small></dt>
532 <dd>Specifies the path to the <tt>llvm-as</tt> tool.</dd>
533 <dt><a name="LLVMGCC"><tt>LLVMGCC</tt></a><small>(defaulted)</small></dt>
534 <dd>Specifies the path to the LLVM version of the GCC 'C' Compiler</dd>
535 <dt><a name="LLVMGXX"><tt>LLVMGXX</tt></a><small>(defaulted)</small></dt>
536 <dd>Specifies the path to the LLVM version of the GCC C++ Compiler</dd>
537 <dt><a name="LLVM_OBJ_ROOT"><tt>LLVM_OBJ_ROOT</tt></a><small>(configured)</small></dt>
538 <dd>Specifies the top directory into which the output of the build is
540 <dt><a name="LLVM_SRC_ROOT"><tt>LLVM_SRC_ROOT</tt></a><small>(configured)</small></dt>
541 <dd>Specifies the top directory in which the sources are found.</dd>
542 <dt><a name="LLVM_TARBALL_NAME"><tt>LLVM_TARBALL_NAME</tt></a><small>(configured)</small></dt>
543 <dd>Specifies the name of the distribution tarball to create. This is
544 configured from the name of the project and its version number.</dd>
545 <dt><a name="MKDIR"><tt>MKDIR</tt></a><small>(defaulted)</small></dt>
546 <dd>Specifies the path to the <tt>mkdir</tt> tool that creates
548 <dt><a name="PLATFORMSTRIPOPTS"><tt>PLATFORMSTRIPOPTS</tt></a></dt>
549 <dd>The options to provide to the linker to specify that a stripped (no
550 symbols) executable should be built.</dd>
551 <dt><a name="RANLIB"><tt>RANLIB</tt></a><small>(defaulted)</small></dt>
552 <dd>Specifies the path to the <tt>ranlib</tt> tool.</dd>
553 <dt><a name="RM"><tt>RM</tt></a><small>(defaulted)</small></dt>
554 <dd>Specifies the path to the <tt>rm</tt> tool.</dd>
555 <dt><a name="SED"><tt>SED</tt></a><small>(defaulted)</small></dt>
556 <dd>Specifies the path to the <tt>sed</tt> tool.</dd>
557 <dt><a name="SHLIBEXT"><tt>SHLIBEXT</tt></a><small>(configured)</small></dt>
558 <dd>Provides the filename extension to use for shared libraries.</dd>
559 <dt><a name="TBLGEN"><tt>TBLGEN</tt></a><small>(defaulted)</small></dt>
560 <dd>Specifies the path to the <tt>tblgen</tt> tool.</dd>
561 <dt><a name="TAR"><tt>TAR</tt></a><small>(defaulted)</small></dt>
562 <dd>Specifies the path to the <tt>tar</tt> tool.</dd>
563 <dt><a name="ZIP"><tt>ZIP</tt></a><small>(defaulted)</small></dt>
564 <dd>Specifies the path to the <tt>zip</tt> tool.</dd>
568 <!-- ======================================================================= -->
569 <div class="doc_subsection"><a name="getvars">Readable Variables</a></div>
570 <div class="doc_text">
571 <p>Variables listed in the table below can be used by the user's Makefile but
572 should not be changed. Changing the value will generally cause the build to go
573 wrong, so don't do it.</p>
575 <dt><a name="bindir"><tt>bindir</tt></a></dt>
576 <dd>The directory into which executables will ultimately be installed. This
577 value is derived from the <tt>--prefix</tt> option given to
578 <tt>configure</tt>.</dd>
579 <dt><a name="bytecode_libdir"><tt>bytecode_libdir</tt></a></dt>
580 <dd>The directory into which bytecode libraries will ultimately be installed.
581 This value is derived from the <tt>--prefix</tt> option given to
582 <tt>configure</tt>.</dd>
583 <dt><a name="ConfigureScriptFLAGS"><tt>ConfigureScriptFLAGS</tt></a></dt>
584 <dd>Additional flags given to the <tt>configure</tt> script when
586 <dt><a name="DistDir"><tt>DistDir</tt></a></dt>
587 <dd>The <em>current</em> directory for which a distribution copy is being
589 <dt><a name="Echo"><tt>Echo</tt></a></dt>
590 <dd>The LLVM Makefile System output command. This provides the
591 <tt>llvm[n]</tt> prefix and starts with @ so the command itself is not
592 printed by <tt>make</tt>.</dd>
593 <dt><a name="EchoCmd"><tt>EchoCmd</tt></a></dt>
594 <dd> Same as <a href="#Echo"><tt>Echo</tt></a> but without the leading @.
596 <dt><a name="includedir"><tt>includedir</tt></a></dt>
597 <dd>The directory into which include files will ultimately be installed.
598 This value is derived from the <tt>--prefix</tt> option given to
599 <tt>configure</tt>.</dd>
600 <dt><a name="libdir"><tt>libdir</tt></a></dt><dd></dd>
601 <dd>The directory into which native libraries will ultimately be installed.
602 This value is derived from the <tt>--prefix</tt> option given to
603 <tt>configure</tt>.</dd>
604 <dt><a name="LibDir"><tt>LibDir</tt></a></dt>
605 <dd>The configuration specific directory into which libraries are placed
606 before installation.</dd>
607 <dt><a name="MakefileConfig"><tt>MakefileConfig</tt></a></dt>
608 <dd>Full path of the <tt>Makefile.config</tt> file.</dd>
609 <dt><a name="MakefileConfigIn"><tt>MakefileConfigIn</tt></a></dt>
610 <dd>Full path of the <tt>Makefile.config.in</tt> file.</dd>
611 <dt><a name="ObjDir"><tt>ObjDir</tt></a></dt>
612 <dd>The configuration and directory specific directory where build objects
613 (compilation results) are placed.</dd>
614 <dt><a name="SubDirs"><tt>SubDirs</tt></a></dt>
615 <dd>The complete list of sub-directories of the current directory as
616 specified by other variables.</dd>
617 <dt><a name="Sources"><tt>Sources</tt></a></dt>
618 <dd>The complete list of source files.</dd>
619 <dt><a name="sysconfdir"><tt>sysconfdir</tt></a></dt>
620 <dd>The directory into which configuration files will ulitmately be
621 installed. This value is derived from the <tt>--prefix</tt> option given to
622 <tt>configure</tt>.</dd>
623 <dt><a name="ToolDir"><tt>ToolDir</tt></a></dt>
624 <dd>The configuration specific directory into which executables are placed
625 before they are installed.</dd>
626 <dt><a name="TopDistDir"><tt>TopDistDir</tt></a></dt>
627 <dd>The top most directory into which the distribution files are copied.</dd>
628 <dt><a name="Verb"><tt>Verb</tt></a></dt>
629 <dd>Use this as the first thing on your build script lines to enable or
630 disable verbose mode. It expands to either an @ (quiet mode) or nothing
631 (verbose mode). </dd>
635 <!-- ======================================================================= -->
636 <div class="doc_subsection"><a name="intvars">Internal Variables</a></div>
637 <div class="doc_text">
638 <p>Variables listed below are used by the LLVM Makefile System
639 and considered internal. You should not use these variables under any
642 <dt><a name="Archive"><tt>Archive</tt></a></dt><dd></dd>
643 <dt><a name="AR.Flags"><tt>AR.Flags</tt></a></dt><dd></dd>
644 <dt><a name="BaseNameSources"><tt>BaseNameSources</tt></a></dt><dd></dd>
645 <dt><a name="BCCompile.C"><tt>BCCompile.C</tt></a></dt><dd></dd>
646 <dt><a name="BCCompile.CXX"><tt>BCCompile.CXX</tt></a></dt><dd></dd>
647 <dt><a name="BCLinkLib"><tt>BCLinkLib</tt></a></dt><dd></dd>
648 <dt><a name="Burg"><tt>Burg</tt></a></dt><dd></dd>
649 <dt><a name="C.Flags"><tt>C.Flags</tt></a></dt><dd></dd>
650 <dt><a name="Compile.C"><tt>Compile.C</tt></a></dt><dd></dd>
651 <dt><a name="CompileCommonOpts"><tt>CompileCommonOpts</tt></a></dt><dd></dd>
652 <dt><a name="Compile.CXX"><tt>Compile.CXX</tt></a></dt><dd></dd>
653 <dt><a name="ConfigStatusScript"><tt>ConfigStatusScript</tt></a></dt><dd></dd>
654 <dt><a name="Configuration"><tt>Configuration</tt></a></dt><dd></dd>
655 <dt><a name="ConfigureScript"><tt>ConfigureScript</tt></a></dt><dd></dd>
656 <dt><a name="CPP.Flags"><tt>CPP.Flags</tt></a></dt><dd></dd>
657 <dt><a name="CPP.Flags "><tt>CPP.Flags </tt></a></dt><dd></dd>
658 <dt><a name="CXX.Flags"><tt>CXX.Flags</tt></a></dt><dd></dd>
659 <dt><a name="DependFiles"><tt>DependFiles</tt></a></dt><dd></dd>
660 <dt><a name="DestArchiveLib"><tt>DestArchiveLib</tt></a></dt><dd></dd>
661 <dt><a name="DestBytecodeLib"><tt>DestBytecodeLib</tt></a></dt><dd></dd>
662 <dt><a name="DestRelinkedLib"><tt>DestRelinkedLib</tt></a></dt><dd></dd>
663 <dt><a name="DestSharedLib"><tt>DestSharedLib</tt></a></dt><dd></dd>
664 <dt><a name="DestTool"><tt>DestTool</tt></a></dt><dd></dd>
665 <dt><a name="DistAlways"><tt>DistAlways</tt></a></dt><dd></dd>
666 <dt><a name="DistCheckDir"><tt>DistCheckDir</tt></a></dt><dd></dd>
667 <dt><a name="DistCheckTop"><tt>DistCheckTop</tt></a></dt><dd></dd>
668 <dt><a name="DistFiles"><tt>DistFiles</tt></a></dt><dd></dd>
669 <dt><a name="DistName"><tt>DistName</tt></a></dt><dd></dd>
670 <dt><a name="DistOther"><tt>DistOther</tt></a></dt><dd></dd>
671 <dt><a name="DistSources"><tt>DistSources</tt></a></dt><dd></dd>
672 <dt><a name="DistSubDirs"><tt>DistSubDirs</tt></a></dt><dd></dd>
673 <dt><a name="DistTarBZ2"><tt>DistTarBZ2</tt></a></dt><dd></dd>
674 <dt><a name="DistTarGZip"><tt>DistTarGZip</tt></a></dt><dd></dd>
675 <dt><a name="DistZip"><tt>DistZip</tt></a></dt><dd></dd>
676 <dt><a name="ExtraLibs"><tt>ExtraLibs</tt></a></dt><dd></dd>
677 <dt><a name="INCFiles"><tt>INCFiles</tt></a></dt><dd></dd>
678 <dt><a name="InternalTargets"><tt>InternalTargets</tt></a></dt><dd></dd>
679 <dt><a name="LD.Flags"><tt>LD.Flags</tt></a></dt><dd></dd>
680 <dt><a name="LexOutput"><tt>LexOutput</tt></a></dt><dd></dd>
681 <dt><a name="LibName.A"><tt>LibName.A</tt></a></dt><dd></dd>
682 <dt><a name="LibName.BC"><tt>LibName.BC</tt></a></dt><dd></dd>
683 <dt><a name="LibName.LA"><tt>LibName.LA</tt></a></dt><dd></dd>
684 <dt><a name="LibName.O"><tt>LibName.O</tt></a></dt><dd></dd>
685 <dt><a name="LibTool.Flags"><tt>LibTool.Flags</tt></a></dt><dd></dd>
686 <dt><a name="Link"><tt>Link</tt></a></dt><dd></dd>
687 <dt><a name="LLVMGCCLibDir"><tt>LLVMGCCLibDir</tt></a></dt><dd></dd>
688 <dt><a name="LLVMLibDir"><tt>LLVMLibDir</tt></a></dt><dd></dd>
689 <dt><a name="LLVMLibsOptions"><tt>LLVMLibsOptions</tt></a></dt><dd></dd>
690 <dt><a name="LLVMLibsPaths"><tt>LLVMLibsPaths</tt></a></dt><dd></dd>
691 <dt><a name="LLVMToolDir"><tt>LLVMToolDir</tt></a></dt><dd></dd>
692 <dt><a name="LLVMUsedLibs"><tt>LLVMUsedLibs</tt></a></dt><dd></dd>
693 <dt><a name="LocalTargets"><tt>LocalTargets</tt></a></dt><dd></dd>
694 <dt><a name="LTCompile.C"><tt>LTCompile.C</tt></a></dt><dd></dd>
695 <dt><a name="LTCompile.CXX"><tt>LTCompile.CXX</tt></a></dt><dd></dd>
696 <dt><a name="LTInstall"><tt>LTInstall</tt></a></dt><dd></dd>
697 <dt><a name="ObjectsBC"><tt>ObjectsBC</tt></a></dt><dd></dd>
698 <dt><a name="ObjectsLO"><tt>ObjectsLO</tt></a></dt><dd></dd>
699 <dt><a name="ObjectsO"><tt>ObjectsO</tt></a></dt><dd></dd>
700 <dt><a name="ObjMakefiles"><tt>ObjMakefiles</tt></a></dt><dd></dd>
701 <dt><a name="Parallel_Targets"><tt>Parallel_Targets</tt></a></dt><dd></dd>
702 <dt><a name="PreConditions"><tt>PreConditions</tt></a></dt><dd></dd>
703 <dt><a name="ProjLibsOptions"><tt>ProjLibsOptions</tt></a></dt><dd></dd>
704 <dt><a name="ProjLibsPaths"><tt>ProjLibsPaths</tt></a></dt><dd></dd>
705 <dt><a name="ProjUsedLibs"><tt>ProjUsedLibs</tt></a></dt><dd></dd>
706 <dt><a name="Ranlib"><tt>Ranlib</tt></a></dt><dd></dd>
707 <dt><a name="RecursiveTargets"><tt>RecursiveTargets</tt></a></dt><dd></dd>
708 <dt><a name="Relink"><tt>Relink</tt></a></dt><dd></dd>
709 <dt><a name="SrcMakefiles"><tt>SrcMakefiles</tt></a></dt><dd></dd>
710 <dt><a name="Strip"><tt>Strip</tt></a></dt><dd></dd>
711 <dt><a name="StripWarnMsg"><tt>StripWarnMsg</tt></a></dt><dd></dd>
712 <dt><a name="TableGen"><tt>TableGen</tt></a></dt><dd></dd>
713 <dt><a name="TDFiles"><tt>TDFiles</tt></a></dt><dd></dd>
714 <dt><a name="ToolBuildPath"><tt>ToolBuildPath</tt></a></dt><dd></dd>
715 <dt><a name="TopLevelTargets"><tt>TopLevelTargets</tt></a></dt><dd></dd>
716 <dt><a name="UserTargets"><tt>UserTargets</tt></a></dt><dd></dd>
717 <dt><a name="YaccOutput"><tt>YaccOutput</tt></a></dt><dd></dd>
721 <!-- *********************************************************************** -->
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729 <a href="mailto:rspencer@x10sys.com">Reid Spencer</a><br>
730 <a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a><br>
731 Last modified: $Date$