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Willy Tarreau7f332732018-12-16 22:27:15 +01001Installation instructions for HAProxy
2=====================================
3
Willy Tarreau46fb37c2021-05-14 09:02:22 +02004HAProxy 2.4 is a long-term supported version, which means that it will get
5fixes for bugs as they are discovered till around Q2 2026 and will not receive
6new features. This version is suitable for general deployment as it is expected
7to receive less frequent updates than regular stable branches which have an odd
8digit in the minor version number. New users are strongly advised encouraged to
9use only such long-term supported versions such as the ones provided by their
10software vendor or Linux distribution. If for any reason you would prefer a
11different version than the one packaged for your system, you want to be certain
12to have all the fixes or to get some commercial support, other choices are
13available at http://www.haproxy.com/.
Willy Tarreau7f332732018-12-16 22:27:15 +010014
15
16Areas covered in this document
17==============================
18
191) Quick build & install
202) Basic principles
213) Build environment
224) Dependencies
235) Advanced build options
246) How to install HAProxy
25
26
271) Quick build & install
28========================
29
30If you've already built HAProxy and are just looking for a quick reminder, here
31are a few build examples :
32
33 - recent Linux system with all options, make and install :
34 $ make clean
Willy Tarreaud254aa82019-06-14 18:40:48 +020035 $ make -j $(nproc) TARGET=linux-glibc \
Willy Tarreau12840be2021-04-22 14:14:22 +020036 USE_OPENSSL=1 USE_LUA=1 USE_PCRE=1 USE_SYSTEMD=1
Willy Tarreau7f332732018-12-16 22:27:15 +010037 $ sudo make install
38
39 - FreeBSD and OpenBSD, build with all options :
Willy Tarreau12840be2021-04-22 14:14:22 +020040 $ gmake -j 4 TARGET=freebsd USE_OPENSSL=1 USE_LUA=1 USE_PCRE=1
Willy Tarreau7f332732018-12-16 22:27:15 +010041
42 - embedded Linux, build using a cross-compiler :
Willy Tarreau12840be2021-04-22 14:14:22 +020043 $ make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_PCRE=1 \
Willy Tarreaud254aa82019-06-14 18:40:48 +020044 CC=/opt/cross/gcc730-arm/bin/gcc ADDLIB=-latomic
Willy Tarreau7f332732018-12-16 22:27:15 +010045
46 - Build with static PCRE on Solaris / UltraSPARC :
47 $ make TARGET=solaris CPU=ultrasparc USE_STATIC_PCRE=1
48
49For more advanced build options or if a command above reports an error, please
50read the following sections.
51
52
532) Basic principles
54===================
55
56HAProxy uses a single GNU Makefile which supports options on the command line,
57so that there is no need to hack a "configure" file to work on your system. The
58makefile totally supports parallel build using "make -j <jobs>" where <jobs>
59matches the number of usable processors, which on some platforms is returned by
60the "nproc" utility. The explanations below may occasionally refer to some
61options, usually in the form "name=value", which have to be passed to the
62command line. This means that the option has to be passed after the "make"
63command. For example :
64
65 $ make -j $(nproc) TARGET=generic USE_GZIP=1
66
67One required option is TARGET, it must be set to a target platform name, which
68provides a number of presets. The list of known platforms is displayed when no
69target is specified. It is not strictly required to use the exact target, you
70can use a relatively similar one and adjust specific variables by hand.
71
72Most configuration variables are in fact booleans. Some options are detected and
73enabled by default if available on the target platform. This is the case for all
74those named "USE_<feature>". These booleans are enabled by "USE_<feature>=1"
Willy Tarreau1efe6892021-04-02 15:53:34 +020075and are disabled by "USE_<feature>=" (with no value). An exhaustive list of the
76supported USE_* features is located at the top of the main Makefile. The last
77occurrence of such an option on the command line overrides any previous one.
78Example :
Willy Tarreau7f332732018-12-16 22:27:15 +010079
80 $ make TARGET=generic USE_THREAD=
81
82In case of error or missing TARGET, a help screen is displayed. It is also
83possible to display a list of all known options using "make help".
84
Willy Tarreau1efe6892021-04-02 15:53:34 +020085Some optional components which may depend on third-party libraries, are used
86with popular tools which are not necessarily standard implementations, or are
87maintained at slower pace than the core of the project, are located in the
88"addons/" directory. These ones may disappear in a future version if the
89product they depend on disappears or if their maintainers do not assign enough
90resources to maintain them any more. For this reason they are not built by
91default, but some USE_* options are usually provided for them, and their build
92is routinely tested anyway.
93
Willy Tarreau7f332732018-12-16 22:27:15 +010094
953) Build environment
96====================
97
98HAProxy requires a working GCC or Clang toolchain and GNU make :
99
100 - GNU make >= 3.80. Note that neither Solaris nor OpenBSD's make work with
101 the GNU Makefile. If you get many syntax errors when running "make", you
102 may want to retry with "gmake" which is the name commonly used for GNU make
103 on BSD systems.
104
Willy Tarreauf5c51072022-05-11 11:29:54 +0200105 - GCC >= 4.2 (up to 12 tested). Older versions can be made to work with a
Willy Tarreau7f332732018-12-16 22:27:15 +0100106 few minor adaptations if really needed. Newer versions may sometimes break
107 due to compiler regressions or behaviour changes. The version shipped with
108 your operating system is very likely to work with no trouble. Clang >= 3.0
109 is also known to work as an alternative solution. Recent versions may emit
Willy Tarreau4ced4bd2020-07-07 16:17:00 +0200110 a bit more warnings that are worth reporting as they may reveal real bugs.
Willy Tarreauc22747d2020-11-05 16:56:37 +0100111 TCC (https://repo.or.cz/tinycc.git) is also usable for developers but will
112 not support threading and was found at least once to produce bad code in
113 some rare corner cases (since fixed). But it builds extremely quickly
114 (typically half a second for the whole project) and is very convenient to
115 run quick tests during API changes or code refactoring.
Willy Tarreau7f332732018-12-16 22:27:15 +0100116
117 - GNU ld (binutils package), with no particular version. Other linkers might
118 work but were not tested.
119
120On debian or Ubuntu systems and their derivatives, you may get all these tools
121at once by issuing the two following commands :
122
123 $ sudo apt-get update
124 $ sudo apt-get install build-essential
125
126On Fedora, CentOS, RHEL and derivatives, you may get the equivalent packages
127with the following command :
128
129 $ sudo yum groupinstall "Development Tools"
130
131Please refer to your operating system's documentation for other systems.
132
133It is also possible to build HAProxy for another system or platform using a
134cross-compiler but in this case you probably already have installed these
135tools.
136
Willy Tarreauc5aa0602021-05-14 08:03:00 +0200137Building HAProxy may require between 60 and 80 MB of free space in the
Willy Tarreau7f332732018-12-16 22:27:15 +0100138directory where the sources have been extracted, depending on the debugging
139options involved.
140
141
1424) Dependencies
143===============
144
145HAProxy in its basic form does not depend on anything beyond a working libc.
146However a number of options are enabled by default, or are highly recommended,
147and these options will typically involve some external components or libraries,
Ilya Shipitsin2a950d02020-03-06 13:07:38 +0500148depending on the targeted platform.
Willy Tarreau7f332732018-12-16 22:27:15 +0100149
150Optional dependencies may be split into several categories :
151
152 - memory allocation
153 - regular expressions
154 - multi-threading
155 - password encryption
156 - cryptography
157 - compression
158 - lua
159 - device detection
160 - miscellaneous
161
162
1634.1) Memory allocation
164----------------------
165By default, HAProxy uses the standard malloc() call provided by the libc. It
Willy Tarreauc3643512019-03-27 14:20:43 +0100166may also be built to use jemalloc, which is fast and thread-safe. In order to
167use it, please add "-ljemalloc" to the ADDLIB variable. You may possibly also
168need to append "-lpthread" and/or "-ldl" depending on the operating system.
Willy Tarreau7f332732018-12-16 22:27:15 +0100169
170
1714.2) Regular expressions
172------------------------
173HAProxy may make use regular expressions (regex) to match certain patterns. The
174regex engine is provided by default in the libc. On some operating systems, it
175might happen that the original regex library provided by the libc is too slow,
176too limited or even bogus. For example, on older Solaris versions up to 8, the
177default regex used not to properly extract group references, without reporting
178compilation errors. Also, some early versions of the GNU libc used to include a
179regex engine which could be slow or even crash on certain patterns.
180
181If you plan on importing a particularly heavy configuration involving a lot of
Ilya Shipitsinc6ecf562021-08-07 14:41:56 +0500182regex, you may benefit from using some alternative regex implementations such as
Willy Tarreau7f332732018-12-16 22:27:15 +0100183PCRE. HAProxy natively supports PCRE and PCRE2, both in standard and JIT
184flavors (Just In Time). The following options are available depending on the
185library version provided on your system :
186
187 - "USE_PCRE=1" : enable PCRE version 1, dynamic linking
188 - "USE_STATIC_PCRE=1" : enable PCRE version 1, static linking
189 - "USE_PCRE_JIT=1" : enable PCRE version 1 in JIT mode
190 - "USE_PCRE2=1" : enable PCRE version 2, dynamic linking
191 - "USE_STATIC_PCRE2=1" : enable PCRE version 2, static linking
192 - "USE_PCRE2_JIT=1" : enable PCRE version 2 in JIT mode
193
194Both of these libraries may be downloaded from https://www.pcre.org/.
195
196By default, the include and library paths are figured from the "pcre-config"
197and "pcre2-config" utilities. If these ones are not installed or inaccurate
198(for example when cross-compiling), it is possible to force the path to include
199files using "PCRE_INC" and "PCRE2_INC" respectively, and the path to library
200files using "PCRE_LIB" and "PCRE2_LIB" respectively. For example :
201
202 $ make TARGET=generic \
203 USE_PCRE2_JIT=1 PCRE2_INC=/opt/cross/include PCRE2_LIB=/opt/cross/lib
204
205
2064.3) Multi-threading
207--------------------
208On some systems for which positive feedback was reported, multi-threading will
209be enabled by default. When multi-threading is used, the libpthread library
210(POSIX threading) will be used. If the target system doesn't contain such a
211library, it is possible to forcefully disable multi-threading by adding
212"USE_THREAD=" on the command line.
213
214
2154.4) Password encryption
216------------------------
217Many systems provide password encryption functions used for authentication. On
218some systems these functions are part of the libc. On others, they're part of a
219separate library called "libcrypt". The default targets are pre-configured
220based on which system needs the library. It is possible to forcefully disable
221the linkage against libcrypt by adding "USE_LIBCRYPT=" on the command line, or
222to forcefully enable it using "USE_LIBCRYPT=1".
223
224
2254.5) Cryptography
226-----------------
227For SSL/TLS, it is necessary to use a cryptography library. HAProxy currently
Willy Tarreaub9ccef22022-05-08 10:59:00 +0200228supports the OpenSSL library, and is known to build and work with branches
Willy Tarreau7f332732018-12-16 22:27:15 +01002290.9.8, 1.0.0, 1.0.1, 1.0.2, 1.1.0 and 1.1.1. OpenSSL follows a long-term
230support cycle similar to HAProxy's, and each of the branches above receives its
231own fixes, without forcing you to upgrade to another branch. There is no excuse
232for staying vulnerable by not applying a fix available for your version. There
233is always a small risk of regression when jumping from one branch to another
234one, especially when it's very new, so it's preferable to observe for a while
235if you use a different version than your system's defaults.
236
237Two OpenSSL derivatives called LibreSSL and BoringSSL are reported to work as
238well. While there are some efforts from the community to ensure they work well,
239OpenSSL remains the primary target and this means that in case of conflicting
240choices, OpenSSL support will be favored over other options.
241
242In order to enable SSL/TLS support, simply pass "USE_OPENSSL=1" on the command
243line and the default library present on your system will be used :
244
245 $ make TARGET=generic USE_OPENSSL=1
246
247If you want to use a different version from the one provided by your system
248(which is not recommended due to the risk of missing security fixes), it is
249possible to indicate the path to the SSL include files using SSL_INC, and the
250SSL library files using SSL_LIB. Example :
251
252 $ make TARGET=generic \
253 USE_OPENSSL=1 SSL_INC=/opt/ssl-1.1.1/include SSL_LIB=/opt/ssl-1.1.1/lib
254
255In order to link OpenSSL statically against HAProxy, first download OpenSSL
256from https://www.openssl.org/ then build it with the "no-shared" keyword and
257install it to a local directory, so your system is not affected :
258
259 $ export STATICLIBSSL=/tmp/staticlibssl
260 $ ./config --prefix=$STATICLIBSSL no-shared
261 $ make && make install_sw
262
263Then when building haproxy, pass that path via SSL_INC and SSL_LIB :
264
265 $ make TARGET=generic \
266 USE_OPENSSL=1 SSL_INC=$STATICLIBSSL/include SSL_LIB=$STATICLIBSSL/lib
267
268When building with OpenSSL on some systems, you may also need to enable support
269for the "libz" library, which is visible if the linker complains about function
270"deflateInit()" not being found. In this case, simply append "ADDLIB=-lz" to
271the command line.
272
273It is worth mentioning that asynchronous cryptography engines are supported on
274OpenSSL 1.1.0 and above. Such engines are used to access hardware cryptography
275acceleration that might be present on your system.
276
277
2784.6) Compression
279----------------
280HAProxy can compress HTTP responses before delivering them to clients, in order
281to save network bandwidth. Two compression options are available. The first one
Willy Tarreau12840be2021-04-22 14:14:22 +0200282relies on the libslz library (http://libslz.org) that is embedded in haproxy.
283It is enabled by default as it is very fast and does not keep a copy of the
284contents in memory. It is possible to disable it, for example for very small
285systems, by passing "USE_SLZ=" to the "make" command.
286
287Please note that SLZ will benefit from some CPU-specific instructions like the
288availability of the CRC32 extension on some ARM processors. Thus it can further
Willy Tarreau40a871f2021-05-12 09:47:30 +0200289improve its performance to build with "CPU=native" on the target system, or
290"CPU=armv81" (modern systems such as Graviton2 or A55/A75 and beyond),
291"CPU=a72" (e.g. for RPi4, or AWS Graviton), "CPU=a53" (e.g. for RPi3), or
292"CPU=armv8-auto" (automatic detection with minor runtime penalty).
Willy Tarreau12840be2021-04-22 14:14:22 +0200293
294A second option involves the widely known zlib library, which is very likely
295installed on your system. In order to use zlib, simply pass "USE_ZLIB=1" to the
296"make" command line, which will also automatically disable SLZ. If the library
297is not installed in your default system's path, it is possible to specify the
298path to the include files using ZLIB_INC, and the path to the library files
299using ZLIB_LIB :
Willy Tarreau7f332732018-12-16 22:27:15 +0100300
301 $ make TARGET=generic \
302 USE_ZLIB=1 ZLIB_INC=/opt/zlib-1.2.11/include ZLIB_LIB=/opt/zlib-1.2.11/lib
303
Willy Tarreau7f332732018-12-16 22:27:15 +0100304Zlib is commonly found on most systems, otherwise updates can be retrieved from
305http://www.zlib.net/. It is easy and fast to build, and new versions sometimes
Willy Tarreau12840be2021-04-22 14:14:22 +0200306provide better performance so it might be worth using an up-to-date one.
Willy Tarreau7f332732018-12-16 22:27:15 +0100307
Willy Tarreau12840be2021-04-22 14:14:22 +0200308Zlib compresses a bit better than libslz but at the expense of more CPU usage
309(about 3.5 times more minimum), and a huge memory usage (~260 kB per compressed
310stream). The only valid reason for uzing Zlib instead of SLZ here usually is to
311deal with a very limited internet bandwidth while CPU and RAM are abundant so
312that the last few percent of compression ratio are worth the invested hardware.
313
Willy Tarreau7f332732018-12-16 22:27:15 +0100314
3154.7) Lua
316--------
Ilya Shipitsin2a950d02020-03-06 13:07:38 +0500317Lua is an embedded programming language supported by HAProxy to provide more
Willy Tarreau7f332732018-12-16 22:27:15 +0100318advanced scripting capabilities. Only versions 5.3 and above are supported.
319In order to enable Lua support, please specify "USE_LUA=1" on the command line.
320Some systems provide this library under various names to avoid conflicts with
321previous versions. By default, HAProxy looks for "lua5.3", "lua53", "lua". If
322your system uses a different naming, you may need to set the library name in
323the "LUA_LIB_NAME" variable.
324
325If Lua is not provided on your system, it can be very simply built locally. It
326can be downloaded from https://www.lua.org/, extracted and built, for example :
327
328 $ cd /opt/lua-5.3.5
329 $ make linux
330
331The path to the include files and library files may be set using "LUA_INC" and
332"LUA_LIB" respectively. For example :
333
334 $ make TARGET=generic \
335 USE_LUA=1 LUA_INC=/opt/lua-5.3.5/src LUA_LIB=/opt/lua-5.3.5/src
336
337
3384.8) Device detection
339---------------------
340HAProxy supports several device detection modules relying on third party
341products. Some of them may provide free code, others free libs, others free
342evaluation licenses. Please read about their respective details in the
343following files :
344
345 doc/DeviceAtlas-device-detection.txt for DeviceAtlas
346 doc/51Degrees-device-detection.txt for 51Degrees
Willy Tarreaub3cc9f22019-04-19 16:03:32 +0200347 doc/WURFL-device-detection.txt for Scientiamobile WURFL
Willy Tarreau7f332732018-12-16 22:27:15 +0100348
349
3504.9) Miscellaneous
351------------------
352Some systems have specificities. Usually these specificities are known and/or
353detected and properly set for you. If you need to adjust the behaviour, here
354are the extra libraries that may be referenced at build time :
355
356 - USE_RT=1 build with librt, which is sometimes needed on some systems
357 when using threads. It is set by default on Linux platforms,
358 and may be disabled using "USE_RT=" if your system doesn't
Willy Tarreau4703fdd2019-06-16 19:39:44 +0200359 have one. You may have to set it as well if you face an error
360 indicating that clock_gettime() was not found.
Willy Tarreau7f332732018-12-16 22:27:15 +0100361
362 - USE_DL=1 build with libdl, which is usually needed for Lua and OpenSSL
363 on Linux. It is automatically detected and may be disabled
364 using "USE_DL=", though it should never harm.
365
366 - USE_SYSTEMD=1 enables support for the sdnotify features of systemd,
367 allowing better integration with systemd on Linux systems
368 which come with it. It is never enabled by default so there
369 is no need to disable it.
370
Willy Tarreau4ced4bd2020-07-07 16:17:00 +0200371
Willy Tarreau4703fdd2019-06-16 19:39:44 +02003724.10) Common errors
373-------------------
374Some build errors may happen depending on the options combinations or the
375selected target. When facing build errors, if you know that your system is a
376bit special or particularly old, start from TARGET=generic, it is easier to
377start from there and fix the remaining issues than trying to degrade another
378target. Common issues may include:
379
380 - clock_gettime() not found
381 => your system needs USE_RT=1
382
383 - __sync_sub_and_fetch undefined in cache.o
384 => your system needs either USE_PTHREAD_PSHARED=1 or USE_PRIVATE_CACHE=1
385
386 - many __sync_<something> errors in many files
387 => your gcc is too old, build without threads and with private cache.
388
389 - many openssl errors
390 => your OpenSSL version really is too old, do not enable OpenSSL
391
Willy Tarreau7f332732018-12-16 22:27:15 +0100392
3935) How to build HAProxy
394=======================
395
396This section assumes that you have already read section 2 (basic principles)
397and section 3 (build environment). It often refers to section 4 (dependencies).
398
399To build haproxy, you have to choose your target OS amongst the following ones
400and assign it to the TARGET variable :
401
Lukas Tribuscc1eb162019-09-01 16:48:36 +0200402 - linux-glibc for Linux kernel 2.6.28 and above
403 - linux-glibc-legacy for Linux kernel 2.6.28 and above without new features
Willy Tarreau39b2fda2020-04-16 15:14:17 +0200404 - linux-musl for Linux kernel 2.6.28 and above with musl libc
Brad Smith7c503bb2020-09-30 15:46:16 -0400405 - solaris for Solaris 10 and above
Brad Smith3f1977c2020-10-02 18:36:58 -0400406 - freebsd for FreeBSD 10 and above
Brad Smith382001b2020-10-08 01:15:06 -0400407 - dragonfly for DragonFlyBSD 4.3 and above
Brad Smith0fdfe412020-10-08 16:24:52 -0400408 - netbsd for NetBSD 8 and above
Lukas Tribuscc1eb162019-09-01 16:48:36 +0200409 - osx for Mac OS/X
Brad Smith3f1977c2020-10-02 18:36:58 -0400410 - openbsd for OpenBSD 6.3 and above
Lukas Tribuscc1eb162019-09-01 16:48:36 +0200411 - aix51 for AIX 5.1
412 - aix52 for AIX 5.2
Christian Lachnerc1322302020-02-10 10:29:13 +0100413 - aix72-gcc for AIX 7.2 (using gcc)
Lukas Tribuscc1eb162019-09-01 16:48:36 +0200414 - cygwin for Cygwin
415 - haiku for Haiku
416 - generic for any other OS or version.
417 - custom to manually adjust every setting
Willy Tarreau7f332732018-12-16 22:27:15 +0100418
419You may also choose your CPU to benefit from some optimizations. This is
420particularly important on UltraSparc machines. For this, you can assign
421one of the following choices to the CPU variable :
422
423 - i686 for intel PentiumPro, Pentium 2 and above, AMD Athlon (32 bits)
424 - i586 for intel Pentium, AMD K6, VIA C3.
425 - ultrasparc : Sun UltraSparc I/II/III/IV processor
Christian Lachnerc1322302020-02-10 10:29:13 +0100426 - power8 : IBM POWER8 processor
427 - power9 : IBM POWER9 processor
Willy Tarreau40a871f2021-05-12 09:47:30 +0200428 - armv81 : modern ARM cores (Cortex A55/A75/A76/A78/X1, Neoverse, Graviton2)
429 - a72 : ARM Cortex-A72 or A73 (e.g. RPi4, Odroid N2, AWS Graviton)
430 - a53 : ARM Cortex-A53 or any of its successors in 64-bit mode (e.g. RPi3)
431 - armv8-auto : support both older and newer armv8 cores with a minor penalty,
432 thanks to gcc 10's outline atomics (default with gcc 10.2).
Willy Tarreau7f332732018-12-16 22:27:15 +0100433 - native : use the build machine's specific processor optimizations. Use with
434 extreme care, and never in virtualized environments (known to break).
435 - generic : any other processor or no CPU-specific optimization. (default)
436
437Alternatively, you may just set the CPU_CFLAGS value to the optimal GCC options
438for your platform. A second variable named SMALL_OPTS also supports passing a
439number of defines and compiler options usually for small systems. For better
440clarity it's recommended to pass the options which result in a smaller binary
441(like memory limits or -Os) into this variable.
442
443If you are building for a different system than the one you're building on,
444this is called "cross-compiling". HAProxy supports cross-compilation pretty
445well and tries to ease it by letting you adjust paths to all libraries (please
446read section 4 on dependencies for more details). When cross-compiling, you
447just need to pass the path to your compiler in the "CC" variable, and the path
448to the linker in the "LD" variable. Most of the time, setting the CC variable
449is enough since LD points to it by default.
450
451By default the build process runs in quiet mode and hide the details of the
452commands that are executed. This allows to more easily catch build warnings
453and see what is happening. However it is not convenient at all to observe what
454flags are passed to the compiler nor what compiler is involved. Simply append
455"V=1" to the "make" command line to switch to verbose mode and display the
456details again. It is recommended to use this option when cross-compiling to
457verify that the paths are correct and that /usr/include is never invovled.
458
459You may want to build specific target binaries which do not match your native
460compiler's target. This is particularly true on 64-bit systems when you want
461to build a 32-bit binary. Use the ARCH variable for this purpose. Right now
462it only knows about a few x86 variants (i386,i486,i586,i686,x86_64), two
463generic ones (32,64) and sets -m32/-m64 as well as -march=<arch> accordingly.
464This variable is only used to set ARCH_FLAGS to preset values, so if you know
465the arch-specific flags that your system needs, you may prefer to set
466ARCH_FLAGS instead. Note that these flags are passed both to the compiler and
467to the linker. For example, in order to build a 32-bit binary on an x86_64
468Linux system with SSL support without support for compression but when OpenSSL
469requires ZLIB anyway :
470
Willy Tarreaud254aa82019-06-14 18:40:48 +0200471 $ make TARGET=linux-glibc ARCH=i386 USE_OPENSSL=1 ADDLIB=-lz
Willy Tarreau7f332732018-12-16 22:27:15 +0100472
473Recent systems can resolve IPv6 host names using getaddrinfo(). This primitive
474is not present in all libcs and does not work in all of them either. Support in
475glibc was broken before 2.3. Some embedded libs may not properly work either,
476thus, support is disabled by default, meaning that some host names which only
477resolve as IPv6 addresses will not resolve and configs might emit an error
478during parsing. If you know that your OS libc has reliable support for
479getaddrinfo(), you can add USE_GETADDRINFO=1 on the make command line to enable
480it. This is the recommended option for most Linux distro packagers since it's
481working fine on all recent mainstream distros. It is automatically enabled on
482Solaris 8 and above, as it's known to work.
483
484If your system supports PCRE (Perl Compatible Regular Expressions), then you
485really should build with libpcre which is between 2 and 10 times faster than
486other libc implementations. Regex are used for header processing (deletion,
487rewriting, allow, deny). Please see section 4 about dependencies to figure
488how to build with PCRE support.
489
490It is possible to add native support for SSL, by passing "USE_OPENSSL=1" on the
491make command line. The libssl and libcrypto will automatically be linked with
492HAProxy. Some systems also require libz, so if the build fails due to missing
493symbols such as deflateInit(), then try again with "ADDLIB=-lz". Please check
494section 4 about dependencies for more information on how to build with OpenSSL.
495
496HAProxy can compress HTTP responses to save bandwidth. Please see section 4
497about dependencies to see the available libraries and associated options.
498
499By default, the DEBUG variable is set to '-g' to enable debug symbols. It is
500not wise to disable it on uncommon systems, because it's often the only way to
501get a usable core when you need one. Otherwise, you can set DEBUG to '-s' to
502strip the binary.
503
504If the ERR variable is set to any non-empty value, then -Werror will be added
505to the compiler so that any build warning will trigger an error. This is the
506recommended way to build when developing, and it is expected that contributed
507patches were tested with ERR=1.
508
509The SSL stack supports session cache synchronization between all running
510processes. This involves some atomic operations and synchronization operations
511which come in multiple flavors depending on the system and architecture :
512
513 Atomic operations :
514 - internal assembler versions for x86/x86_64 architectures
515
516 - gcc builtins for other architectures. Some architectures might not
517 be fully supported or might require a more recent version of gcc.
518 If your architecture is not supported, you willy have to either use
519 pthread if supported, or to disable the shared cache.
520
521 - pthread (posix threads). Pthreads are very common but inter-process
522 support is not that common, and some older operating systems did not
523 report an error when enabling multi-process mode, so they used to
524 silently fail, possibly causing crashes. Linux's implementation is
525 fine. OpenBSD doesn't support them and doesn't build. FreeBSD 9 builds
526 and reports an error at runtime, while certain older versions might
527 silently fail. Pthreads are enabled using USE_PTHREAD_PSHARED=1.
528
529 Synchronization operations :
530 - internal spinlock : this mode is OS-independent, light but will not
531 scale well to many processes. However, accesses to the session cache
532 are rare enough that this mode could certainly always be used. This
533 is the default mode.
534
535 - Futexes, which are Linux-specific highly scalable light weight mutexes
536 implemented in user-space with some limited assistance from the kernel.
537 This is the default on Linux 2.6 and above and is enabled by passing
538 USE_FUTEX=1
539
540 - pthread (posix threads). See above.
541
542If none of these mechanisms is supported by your platform, you may need to
543build with USE_PRIVATE_CACHE=1 to totally disable SSL cache sharing. Then it
544is better not to run SSL on multiple processes. Note that you don't need these
545features if you only intend to use multi-threading and never multi-process.
546
547If you need to pass other defines, includes, libraries, etc... then please
548check the Makefile to see which ones will be available in your case, and
549use/override the USE_* variables from the Makefile.
550
551AIX 5.3 is known to work with the generic target. However, for the binary to
552also run on 5.2 or earlier, you need to build with DEFINE="-D_MSGQSUPPORT",
553otherwise __fd_select() will be used while not being present in the libc, but
554this is easily addressed using the "aix52" target. If you get build errors
555because of strange symbols or section mismatches, simply remove -g from
556DEBUG_CFLAGS.
557
Christian Lachnerc1322302020-02-10 10:29:13 +0100558Building on AIX 7.2 works fine using the "aix72-gcc" TARGET. It adds two
Thayne McCombscdbcca92021-01-07 21:24:41 -0700559special CFLAGS to prevent the loading of AIX's xmem.h and var.h. This is done
Christian Lachnerc1322302020-02-10 10:29:13 +0100560by defining the corresponding include-guards _H_XMEM and _H_VAR. Without
561excluding those header-files the build fails because of redefinition errors.
Ilya Shipitsin2a950d02020-03-06 13:07:38 +0500562Furthermore, the atomic library is added to the LDFLAGS to allow for
Christian Lachnerc1322302020-02-10 10:29:13 +0100563multithreading via USE_THREAD.
564
Willy Tarreau7f332732018-12-16 22:27:15 +0100565You can easily define your own target with the GNU Makefile. Unknown targets
566are processed with no default option except USE_POLL=default. So you can very
Willy Tarreau12840be2021-04-22 14:14:22 +0200567well use that property to define your own set of options. USE_POLL and USE_SLZ
568can even be disabled by setting them to an empty string. For example :
Willy Tarreau7f332732018-12-16 22:27:15 +0100569
Willy Tarreau12840be2021-04-22 14:14:22 +0200570 $ gmake TARGET=tiny USE_POLL="" USE_SLZ="" TARGET_CFLAGS=-fomit-frame-pointer
Willy Tarreau7f332732018-12-16 22:27:15 +0100571
572If you need to pass some defines to the preprocessor or compiler, you may pass
573them all in the DEFINE variable. Example:
574
575 $ make TARGET=generic DEFINE="-DDEBUG_DONT_SHARE_POOLS -DDEBUG_MEMORY_POOLS"
576
577The ADDINC variable may be used to add some extra include paths; this is
578sometimes needed when cross-compiling. Similarly the ADDLIB variable may be
579used to specifify extra paths to library files. Example :
580
581 $ make TARGET=generic ADDINC=-I/opt/cross/include ADDLIB=-L/opt/cross/lib64
582
583
5846) How to install HAProxy
585=========================
586
587To install haproxy, you can either copy the single resulting binary to the
588place you want, or run :
589
590 $ sudo make install
591
592If you're packaging it for another system, you can specify its root directory
593in the usual DESTDIR variable.
594
595-- end