5 This document describes installation on all supported operating
6 systems (the Linux/Unix family, OpenVMS and Windows)
8 To install OpenSSL, you will need:
10 * A make implementation
11 * Perl 5 with core modules (please read NOTES.PERL)
12 * The perl module Text::Template (please read NOTES.PERL)
14 * a development environment in the form of development libraries and C
16 * a supported operating system
18 For additional platform specific requirements, solutions to specific
19 issues and other details, please read one of these:
22 * NOTES.WIN (any supported Windows)
23 * NOTES.DJGPP (DOS platform with DJGPP)
25 Notational conventions in this document
26 ---------------------------------------
28 Throughout this document, we use the following conventions in command
31 $ command Any line starting with a dollar sign
32 ($) is a command line.
34 { word1 | word2 | word3 } This denotes a mandatory choice, to be
35 replaced with one of the given words.
36 A simple example would be this:
38 $ echo { FOO | BAR | COOKIE }
40 which is to be understood as one of
49 [ word1 | word2 | word3 ] Similar to { word1 | word2 | word3 }
50 except it's optional to give any of
51 those. In addition to the examples
52 above, this would also be valid:
56 {{ target }} This denotes a mandatory word or
57 sequence of words of some sort. A
58 simple example would be this:
62 which is to be understood to use the
63 command 'type' on some file name
64 determined by the user.
66 [[ options ]] Similar to {{ target }}, but is
69 Note that the notation assumes spaces around {, }, [, ], {{, }} and
70 [[, ]]. This is to differentiate from OpenVMS directory
71 specifications, which also use [ and ], but without spaces.
76 If you want to just get on with it, do:
92 on Windows (only pick one of the targets for configuration):
94 $ perl Configure { VC-WIN32 | VC-WIN64A | VC-WIN64I | VC-CE }
99 If any of these steps fails, see section Installation in Detail below.
101 This will build and install OpenSSL in the default location, which is:
103 Unix: normal installation directories under /usr/local
104 OpenVMS: SYS$COMMON:[OPENSSL-'version'...], where 'version' is the
105 OpenSSL version number with underscores instead of periods.
106 Windows: C:\Program Files\OpenSSL or C:\Program Files (x86)\OpenSSL
108 If you want to install it anywhere else, run config like this:
112 $ ./config --prefix=/opt/openssl --openssldir=/usr/local/ssl
116 $ @config --prefix=PROGRAM:[INSTALLS] --openssldir=SYS$MANAGER:[OPENSSL]
119 Configuration Options
120 ---------------------
122 There are several options to ./config (or ./Configure) to customize
123 the build (note that for Windows, the defaults for --prefix and
124 --openssldir depend in what configuration is used and what Windows
125 implementation OpenSSL is built on. More notes on this in NOTES.WIN):
128 Don't build with support for deprecated APIs below the
129 specified version number. For example "--api=1.1.0" will
130 remove support for all APIS that were deprecated in OpenSSL
131 version 1.1.0 or below.
133 --cross-compile-prefix=PREFIX
134 The PREFIX to include in front of commands for your
135 toolchain. It's likely to have to end with dash, e.g.
136 a-b-c- would invoke GNU compiler as a-b-c-gcc, etc.
137 Unfortunately cross-compiling is too case-specific to
138 put together one-size-fits-all instructions. You might
139 have to pass more flags or set up environment variables
140 to actually make it work. Android and iOS cases are
141 discussed in corresponding Configurations/10-main.cf
142 sections. But there are cases when this option alone is
143 sufficient. For example to build the mingw64 target on
144 Linux "--cross-compile-prefix=x86_64-w64-mingw32-"
145 works. Naturally provided that mingw packages are
146 installed. Today Debian and Ubuntu users have option to
147 install a number of prepackaged cross-compilers along
148 with corresponding run-time and development packages for
149 "alien" hardware. To give another example
150 "--cross-compile-prefix=mipsel-linux-gnu-" suffices
151 in such case. Needless to mention that you have to
152 invoke ./Configure, not ./config, and pass your target
156 Build OpenSSL with debugging symbols.
159 The name of the directory under the top of the installation
160 directory tree (see the --prefix option) where libraries will
161 be installed. By default this is "lib". Note that on Windows
162 only ".lib" files will be stored in this location. dll files
163 will always be installed to the "bin" directory.
166 Directory for OpenSSL configuration files, and also the
167 default certificate and key store. Defaults are:
170 Windows: C:\Program Files\Common Files\SSL
171 or C:\Program Files (x86)\Common Files\SSL
172 OpenVMS: SYS$COMMON:[OPENSSL-COMMON]
175 The top of the installation directory tree. Defaults are:
178 Windows: C:\Program Files\OpenSSL
179 or C:\Program Files (x86)\OpenSSL
180 OpenVMS: SYS$COMMON:[OPENSSL-'version']
183 Build OpenSSL without debugging symbols. This is the default.
186 This is a developer flag that switches on various compiler
187 options recommended for OpenSSL development. It only works
188 when using gcc or clang as the compiler. If you are
189 developing a patch for OpenSSL then it is recommended that
190 you use this option where possible.
192 --with-zlib-include=DIR
193 The directory for the location of the zlib include file. This
194 option is only necessary if enable-zlib (see below) is used
195 and the include file is not already on the system include
199 On Unix: this is the directory containing the zlib library.
200 If not provided the system library path will be used.
201 On Windows: this is the filename of the zlib library (with or
202 without a path). This flag must be provided if the
203 zlib-dynamic option is not also used. If zlib-dynamic is used
204 then this flag is optional and a default value ("ZLIB1") is
205 used if not provided.
206 On VMS: this is the filename of the zlib library (with or
207 without a path). This flag is optional and if not provided
208 then "GNV$LIBZSHR", "GNV$LIBZSHR32" or "GNV$LIBZSHR64" is
209 used by default depending on the pointer size chosen.
212 Don't build the AFALG engine. This option will be forced if
213 on a platform that does not support AFALG.
216 Build with the Address sanitiser. This is a developer option
217 only. It may not work on all platforms and should never be
218 used in production environments. It will only work when used
219 with gcc or clang and should be used in conjunction with the
223 Do not use assembler code. On some platforms a small amount
224 of assembler code may still be used.
227 Do not build support for async operations.
230 Don't automatically load all supported ciphers and digests.
231 Typically OpenSSL will make available all of its supported
232 ciphers and digests. For a statically linked application this
233 may be undesirable if small executable size is an objective.
234 This only affects libcrypto. Ciphers and digests will have to
235 be loaded manually using EVP_add_cipher() and
236 EVP_add_digest() if this option is used. This option will
237 force a non-shared build.
240 Don't automatically load all libcrypto/libssl error strings.
241 Typically OpenSSL will automatically load human readable
242 error strings. For a statically linked application this may
243 be undesirable if small executable size is an objective.
247 Don't build the CAPI engine. This option will be forced if
248 on a platform that does not support CAPI.
251 Don't build support for CMS features
254 Don't build support for SSL/TLS compression. If this option
255 is left enabled (the default), then compression will only
256 work if the zlib or zlib-dynamic options are also chosen.
259 Build support for debugging memory allocated via
260 OPENSSL_malloc() or OPENSSL_zalloc().
262 enable-crypto-mdebug-backtrace
263 As for crypto-mdebug, but additionally provide backtrace
264 information for allocated memory.
265 TO BE USED WITH CARE: this uses GNU C functionality, and
266 is therefore not usable for non-GNU config targets. If
267 your build complains about the use of '-rdynamic' or the
268 lack of header file execinfo.h, this option is not for you.
269 ALSO NOTE that even though execinfo.h is available on your
270 system (through Gnulib), the functions might just be stubs
274 Don't build support for Certificate Transparency.
277 Don't build with support for any deprecated APIs. This is the
278 same as using "--api" and supplying the latest version
282 Don't build support for datagram based BIOs. Selecting this
283 option will also force the disabling of DTLS.
286 Don't build support for loading Dynamic Shared Objects.
289 Don't build the dynamically loaded engines. This only has an
290 effect in a "shared" build
293 Don't build support for Elliptic Curves.
296 Don't build support for binary Elliptic Curves
298 enable-ec_nistp_64_gcc_128
299 Enable support for optimised implementations of some commonly
300 used NIST elliptic curves. This is only supported on some
304 Build support for gathering entropy from EGD (Entropy
308 Don't build support for loading engines.
311 Don't compile in any error strings.
313 enable-external-tests
314 Enable building of integration with external test suites.
315 This is a developer option and may not work on all platforms.
316 The only supported external test suite at the current time is
317 the BoringSSL test suite. See the file test/README.external
321 Don't compile in filename and line number information (e.g.
322 for errors and memory allocation).
324 enable-fuzz-libfuzzer, enable-fuzz-afl
325 Build with support for fuzzing using either libfuzzer or AFL.
326 These are developer options only. They may not work on all
327 platforms and should never be used in production environments.
328 See the file fuzz/README.md for further details.
331 Don't build support for GOST based ciphersuites. Note that
332 if this feature is enabled then GOST ciphersuites are only
333 available if the GOST algorithms are also available through
334 loading an externally supplied engine.
337 Build support for DTLS heartbeats.
340 Don't build the padlock engine.
343 Don't generate dependencies.
346 Don't build support for writing multiple records in one
347 go in libssl (Note: this is a different capability to the
348 pipelining functionality).
351 Don't build support for the NPN TLS extension.
354 Don't build support for OCSP.
357 Don't build with support for Position Independent Code.
360 Don't use POSIX IO capabilities.
363 Don't build support for Pre-Shared Key based ciphersuites.
366 Don't use hardware RDRAND capabilities.
369 Don't build support for RFC3779 ("X.509 Extensions for IP
370 Addresses and AS Identifiers")
373 Build support for SCTP
376 Do not create shared libraries, only static ones. See "Note
377 on shared libraries" below.
380 Don't build support for socket BIOs
383 Don't build support for SRP or SRP based ciphersuites.
386 Don't build SRTP support
389 Exclude SSE2 code paths. Normally SSE2 extension is
390 detected at run-time, but the decision whether or not the
391 machine code will be executed is taken solely on CPU
392 capability vector. This means that if you happen to run OS
393 kernel which does not support SSE2 extension on Intel P4
394 processor, then your application might be exposed to
395 "illegal instruction" exception. There might be a way
396 to enable support in kernel, e.g. FreeBSD kernel can be
397 compiled with CPU_ENABLE_SSE, and there is a way to
398 disengage SSE2 code paths upon application start-up,
399 but if you aim for wider "audience" running such kernel,
400 consider no-sse2. Both the 386 and no-asm options imply
404 Build with the SSL Trace capabilities (adds the "-trace"
405 option to s_client and s_server).
408 Don't build the statically linked engines. This only
409 has an impact when not built "shared".
412 Don't use any C "stdio" features. Only libcrypto and libssl
413 can be built in this way. Using this option will suppress
414 building the command line applications. Additionally since
415 the OpenSSL tests also use the command line applications the
416 tests will also be skipped.
419 Don't try to build with support for multi-threaded
423 Build with support for multi-threaded applications. Most
424 platforms will enable this by default. However if on a
425 platform where this is not the case then this will usually
426 require additional system-dependent options! See "Note on
427 multi-threading" below.
430 Don't build Time Stamping Authority support.
433 Build with the Undefined Behaviour sanitiser. This is a
434 developer option only. It may not work on all platforms and
435 should never be used in production environments. It will only
436 work when used with gcc or clang and should be used in
437 conjunction with the "-DPEDANTIC" option (or the
438 --strict-warnings option).
441 Don't build with the "UI" capability (i.e. the set of
442 features enabling text based prompts).
445 Enable additional unit test APIs. This should not typically
446 be used in production deployments.
448 enable-weak-ssl-ciphers
449 Build support for SSL/TLS ciphers that are considered "weak"
450 (e.g. RC4 based ciphersuites).
453 Build with support for zlib compression/decompression.
456 Like "zlib", but has OpenSSL load the zlib library
457 dynamically when needed. This is only supported on systems
458 where loading of shared libraries is supported.
461 On Intel hardware, use the 80386 instruction set only
462 (the default x86 code is more efficient, but requires at
463 least a 486). Note: Use compiler flags for any other CPU
464 specific configuration, e.g. "-m32" to build x86 code on
468 TODO(TLS1.3): Make this enabled by default
469 Build support for TLS1.3. Note: This is a WIP feature and
470 does not currently interoperate with other TLS1.3
471 implementations! Use with caution!!
474 Don't build support for negotiating the specified SSL/TLS
475 protocol (one of ssl, ssl3, tls, tls1, tls1_1, tls1_2, dtls,
476 dtls1 or dtls1_2). If "no-tls" is selected then all of tls1,
477 tls1_1 and tls1_2 are disabled. Similarly "no-dtls" will
478 disable dtls1 and dtls1_2. The "no-ssl" option is synonymous
479 with "no-ssl3". Note this only affects version negotiation.
480 OpenSSL will still provide the methods for applications to
481 explicitly select the individual protocol versions.
484 As for no-<prot> but in addition do not build the methods for
485 applications to explicitly select individual protocol
489 Build with support for the specified algorithm, where <alg>
490 is one of: md2 or rc5.
493 Build without support for the specified algorithm, where
494 <alg> is one of: bf, blake2, camellia, cast, chacha, cmac,
495 des, dh, dsa, ecdh, ecdsa, idea, md4, mdc2, ocb, poly1305,
496 rc2, rc4, rmd160, scrypt, seed or whirlpool. The "ripemd"
497 algorithm is deprecated and if used is synonymous with rmd160.
499 -Dxxx, -lxxx, -Lxxx, -fxxx, -mXXX, -Kxxx
500 These system specific options will be passed through to the
501 compiler to allow you to define preprocessor symbols, specify
502 additional libraries, library directories or other compiler
506 Installation in Detail
507 ----------------------
509 1a. Configure OpenSSL for your operation system automatically:
511 NOTE: This is not available on Windows.
513 $ ./config [[ options ]] # Unix
517 $ @config [[ options ]] ! OpenVMS
519 For the remainder of this text, the Unix form will be used in all
520 examples, please use the appropriate form for your platform.
522 This guesses at your operating system (and compiler, if necessary) and
523 configures OpenSSL based on this guess. Run ./config -t to see
524 if it guessed correctly. If you want to use a different compiler, you
525 are cross-compiling for another platform, or the ./config guess was
526 wrong for other reasons, go to step 1b. Otherwise go to step 2.
528 On some systems, you can include debugging information as follows:
530 $ ./config -d [[ options ]]
532 1b. Configure OpenSSL for your operating system manually
534 OpenSSL knows about a range of different operating system, hardware and
535 compiler combinations. To see the ones it knows about, run
541 $ perl Configure # All other platforms
543 For the remainder of this text, the Unix form will be used in all
544 examples, please use the appropriate form for your platform.
546 Pick a suitable name from the list that matches your system. For most
547 operating systems there is a choice between using "cc" or "gcc". When
548 you have identified your system (and if necessary compiler) use this name
549 as the argument to Configure. For example, a "linux-elf" user would
552 $ ./Configure linux-elf [[ options ]]
554 If your system isn't listed, you will have to create a configuration
555 file named Configurations/{{ something }}.conf and add the correct
556 configuration for your system. See the available configs as examples
557 and read Configurations/README and Configurations/README.design for
560 The generic configurations "cc" or "gcc" should usually work on 32 bit
563 Configure creates a build file ("Makefile" on Unix, "makefile" on Windows
564 and "descrip.mms" on OpenVMS) from a suitable template in Configurations,
565 and defines various macros in include/openssl/opensslconf.h (generated from
566 include/openssl/opensslconf.h.in).
568 1c. Configure OpenSSL for building outside of the source tree.
570 OpenSSL can be configured to build in a build directory separate from
571 the directory with the source code. It's done by placing yourself in
572 some other directory and invoking the configuration commands from
577 $ mkdir /var/tmp/openssl-build
578 $ cd /var/tmp/openssl-build
579 $ /PATH/TO/OPENSSL/SOURCE/config [[ options ]]
583 $ /PATH/TO/OPENSSL/SOURCE/Configure {{ target }} [[ options ]]
587 $ set default sys$login:
588 $ create/dir [.tmp.openssl-build]
589 $ set default [.tmp.openssl-build]
590 $ @[PATH.TO.OPENSSL.SOURCE]config [[ options ]]
594 $ @[PATH.TO.OPENSSL.SOURCE]Configure {{ target }} [[ options ]]
599 $ mkdir \temp-openssl
601 $ perl d:\PATH\TO\OPENSSL\SOURCE\Configure {{ target }} [[ options ]]
603 Paths can be relative just as well as absolute. Configure will
604 do its best to translate them to relative paths whenever possible.
606 2. Build OpenSSL by running:
609 $ mms ! (or mmk) OpenVMS
612 This will build the OpenSSL libraries (libcrypto.a and libssl.a on
613 Unix, corresponding on other platforms) and the OpenSSL binary
614 ("openssl"). The libraries will be built in the top-level directory,
615 and the binary will be in the "apps" subdirectory.
617 If the build fails, look at the output. There may be reasons
618 for the failure that aren't problems in OpenSSL itself (like
619 missing standard headers). If you are having problems you can
620 get help by sending an email to the openssl-users email list (see
621 https://www.openssl.org/community/mailinglists.html for details). If
622 it is a bug with OpenSSL itself, please open an issue on GitHub, at
623 https://github.com/openssl/openssl/issues. Please review the existing
624 ones first; maybe the bug was already reported or has already been
627 (If you encounter assembler error messages, try the "no-asm"
628 configuration option as an immediate fix.)
630 Compiling parts of OpenSSL with gcc and others with the system
631 compiler will result in unresolved symbols on some systems.
633 3. After a successful build, the libraries should be tested. Run:
637 $ nmake test # Windows
639 NOTE: you MUST run the tests from an unprivileged account (or
640 disable your privileges temporarily if your platform allows it).
642 If some tests fail, look at the output. There may be reasons for
643 the failure that isn't a problem in OpenSSL itself (like a
644 malfunction with Perl). You may want increased verbosity, that
645 can be accomplished like this:
647 $ make VERBOSE=1 test # Unix
649 $ mms /macro=(VERBOSE=1) test ! OpenVMS
651 $ nmake VERBOSE=1 test # Windows
653 If you want to run just one or a few specific tests, you can use
654 the make variable TESTS to specify them, like this:
656 $ make TESTS='test_rsa test_dsa' test # Unix
657 $ mms/macro="TESTS=test_rsa test_dsa" test ! OpenVMS
658 $ nmake TESTS='test_rsa test_dsa' test # Windows
660 And of course, you can combine (Unix example shown):
662 $ make VERBOSE=1 TESTS='test_rsa test_dsa' test
664 You can find the list of available tests like this:
666 $ make list-tests # Unix
667 $ mms list-tests ! OpenVMS
668 $ nmake list-tests # Windows
670 Have a look at the manual for the perl module Test::Harness to
671 see what other HARNESS_* variables there are.
673 If you find a problem with OpenSSL itself, try removing any
674 compiler optimization flags from the CFLAGS line in Makefile and
675 run "make clean; make" or corresponding.
677 Please send bug reports to <rt@openssl.org>.
679 For more details on how the make variables TESTS can be used,
680 see section TESTS in Detail below.
682 4. If everything tests ok, install OpenSSL with
684 $ make install # Unix
685 $ mms install ! OpenVMS
686 $ nmake install # Windows
688 This will install all the software components in this directory
689 tree under PREFIX (the directory given with --prefix or its
694 bin/ Contains the openssl binary and a few other
697 Contains the header files needed if you want
698 to build your own programs that use libcrypto
700 lib Contains the OpenSSL library files.
701 lib/engines Contains the OpenSSL dynamically loadable engines.
703 share/man/man1 Contains the OpenSSL command line man-pages.
704 share/man/man3 Contains the OpenSSL library calls man-pages.
705 share/man/man5 Contains the OpenSSL configuration format man-pages.
706 share/man/man7 Contains the OpenSSL other misc man-pages.
708 share/doc/openssl/html/man1
709 share/doc/openssl/html/man3
710 share/doc/openssl/html/man5
711 share/doc/openssl/html/man7
712 Contains the HTML rendition of the man-pages.
714 OpenVMS ('arch' is replaced with the architecture name, "Alpha"
715 or "ia64", 'sover' is replaced with the shared library version
716 (0101 for 1.1), and 'pz' is replaced with the pointer size
717 OpenSSL was built with):
719 [.EXE.'arch'] Contains the openssl binary.
720 [.EXE] Contains a few utility scripts.
722 Contains the header files needed if you want
723 to build your own programs that use libcrypto
725 [.LIB.'arch'] Contains the OpenSSL library files.
726 [.ENGINES'sover''pz'.'arch']
727 Contains the OpenSSL dynamically loadable engines.
728 [.SYS$STARTUP] Contains startup, login and shutdown scripts.
729 These define appropriate logical names and
731 [.SYSTEST] Contains the installation verification procedure.
732 [.HTML] Contains the HTML rendition of the manual pages.
735 Additionally, install will add the following directories under
736 OPENSSLDIR (the directory given with --openssldir or its default)
739 certs Initially empty, this is the default location
740 for certificate files.
741 private Initially empty, this is the default location
742 for private key files.
743 misc Various scripts.
745 Package builders who want to configure the library for standard
746 locations, but have the package installed somewhere else so that
747 it can easily be packaged, can use
749 $ make DESTDIR=/tmp/package-root install # Unix
750 $ mms/macro="DESTDIR=TMP:[PACKAGE-ROOT]" install ! OpenVMS
752 The specified destination directory will be prepended to all
753 installation target paths.
755 Compatibility issues with previous OpenSSL versions:
757 * COMPILING existing applications
759 OpenSSL 1.1.0 hides a number of structures that were previously
760 open. This includes all internal libssl structures and a number
761 of EVP types. Accessor functions have been added to allow
762 controlled access to the structures' data.
764 This means that some software needs to be rewritten to adapt to
765 the new ways of doing things. This often amounts to allocating
766 an instance of a structure explicitly where you could previously
767 allocate them on the stack as automatic variables, and using the
768 provided accessor functions where you would previously access a
769 structure's field directly.
771 Some APIs have changed as well. However, older APIs have been
772 preserved when possible.
774 Environment Variables
775 ---------------------
777 A number of environment variables can be used to provide additional control
778 over the build process. Typically these should be defined prior to running
779 config or Configure. Not all environment variables are relevant to all
783 The name of the ar executable to use.
786 Use a different build file name than the platform default
787 ("Makefile" on Unixly platforms, "makefile" on native Windows,
788 "descrip.mms" on OpenVMS). This requires that there is a
789 corresponding build file template. See Configurations/README
790 for further information.
793 The compiler to use. Configure will attempt to pick a default
794 compiler for your platform but this choice can be overridden
795 using this variable. Set it to the compiler executable you wish
796 to use, e.g. "gcc" or "clang".
799 This environment variable has the same meaning as for the
800 "--cross-compile-prefix" Configure flag described above. If both
801 are set then the Configure flag takes precedence.
804 The name of the nm executable to use.
806 OPENSSL_LOCAL_CONFIG_DIR
807 OpenSSL comes with a database of information about how it
808 should be built on different platforms as well as build file
809 templates for those platforms. The database is comprised of
810 ".conf" files in the Configurations directory. The build
811 file templates reside there as well as ".tmpl" files. See the
812 file Configurations/README for further information about the
813 format of ".conf" files as well as information on the ".tmpl"
815 In addition to the standard ".conf" and ".tmpl" files, it is
816 possible to create your own ".conf" and ".tmpl" files and store
817 them locally, outside the OpenSSL source tree. This environment
818 variable can be set to the directory where these files are held
819 and will be considered by Configure before it looks in the
820 standard directories.
823 The name of the Perl executable to use when building OpenSSL.
824 This variable is used in config script only. Configure on the
825 other hand imposes the interpreter by which it itself was
826 executed on the whole build procedure.
829 The command string for the Perl executable to insert in the
830 #! line of perl scripts that will be publically installed.
831 Default: /usr/bin/env perl
832 Note: the value of this variable is added to the same scripts
833 on all platforms, but it's only relevant on Unix-like platforms.
836 The name of the rc executable to use. The default will be as
837 defined for the target platform in the ".conf" file. If not
838 defined then "windres" will be used. The WINDRES environment
839 variable is synonymous to this. If both are defined then RC
843 The name of the ranlib executable to use.
851 The Configure script generates a Makefile in a format relevant to the specific
852 platform. The Makefiles provide a number of targets that can be used. Not all
853 targets may be available on all platforms. Only the most common targets are
854 described here. Examine the Makefiles themselves for the full list.
857 The default target to build all the software components.
860 Remove all build artefacts and return the directory to a "clean"
864 Rebuild the dependencies in the Makefiles. This is a legacy
865 option that no longer needs to be used in OpenSSL 1.1.0.
868 Install all OpenSSL components.
871 Only install the OpenSSL software components.
874 Only install the OpenSSL documentation components.
877 Only install the OpenSSL man pages (Unix only).
880 Only install the OpenSSL html documentation.
883 Prints a list of all the self test names.
886 Build and run the OpenSSL self tests.
889 Uninstall all OpenSSL components.
892 This is a developer option. If you are developing a patch for
893 OpenSSL you may need to use this if you want to update
894 automatically generated files; add new error codes or add new
895 (or change the visibility of) public API functions. (Unix only).
900 The make variable TESTS supports a versatile set of space separated tokens
901 with which you can specify a set of tests to be performed. With a "current
902 set of tests" in mind, initially being empty, here are the possible tokens:
904 alltests The current set of tests becomes the whole set of available
905 tests (as listed when you do 'make list-tests' or similar).
906 xxx Adds the test 'xxx' to the current set of tests.
907 -xxx Removes 'xxx' from the current set of tests. If this is the
908 first token in the list, the current set of tests is first
909 assigned the whole set of available tests, effectively making
910 this token equivalent to TESTS="alltests -xxx"
912 Also, all tokens except for "alltests" may have wildcards, such as *.
913 (on Unix and Windows, BSD style wildcards are supported, while on VMS,
914 it's VMS style wildcards)
916 Example: All tests except for the fuzz tests:
918 $ make TESTS=-test_fuzz test
920 or (if you want to be explicit)
922 $ make TESTS='alltests -test_fuzz' test
924 Example: All tests that have a name starting with "test_ssl" but not those
925 starting with "test_ssl_":
927 $ make TESTS='test_ssl* -test_ssl_*' test
929 Note on multi-threading
930 -----------------------
932 For some systems, the OpenSSL Configure script knows what compiler options
933 are needed to generate a library that is suitable for multi-threaded
934 applications. On these systems, support for multi-threading is enabled
935 by default; use the "no-threads" option to disable (this should never be
938 On other systems, to enable support for multi-threading, you will have
939 to specify at least two options: "threads", and a system-dependent option.
940 (The latter is "-D_REENTRANT" on various systems.) The default in this
941 case, obviously, is not to include support for multi-threading (but
942 you can still use "no-threads" to suppress an annoying warning message
943 from the Configure script.)
945 OpenSSL provides built-in support for two threading models: pthreads (found on
946 most UNIX/Linux systems), and Windows threads. No other threading models are
947 supported. If your platform does not provide pthreads or Windows threads then
948 you should Configure with the "no-threads" option.
950 Notes on shared libraries
951 -------------------------
953 For most systems the OpenSSL Configure script knows what is needed to
954 build shared libraries for libcrypto and libssl. On these systems
955 the shared libraries will be created by default. This can be suppressed and
956 only static libraries created by using the "no-shared" option. On systems
957 where OpenSSL does not know how to build shared libraries the "no-shared"
958 option will be forced and only static libraries will be created.
960 Shared libraries are named a little differently on different platforms.
961 One way or another, they all have the major OpenSSL version number as
962 part of the file name, i.e. for OpenSSL 1.1.x, 1.1 is somehow part of
965 On most POSIXly platforms, shared libraries are named libcrypto.so.1.1
968 on Cygwin, shared libraries are named cygcrypto-1.1.dll and cygssl-1.1.dll
969 with import libraries libcrypto.dll.a and libssl.dll.a.
971 On Windows build with MSVC or using MingW, shared libraries are named
972 libcrypto-1_1.dll and libssl-1_1.dll for 32-bit Windows, libcrypto-1_1-x64.dll
973 and libssl-1_1-x64.dll for 64-bit x86_64 Windows, and libcrypto-1_1-ia64.dll
974 and libssl-1_1-ia64.dll for IA64 Windows. With MSVC, the import libraries
975 are named libcrypto.lib and libssl.lib, while with MingW, they are named
976 libcrypto.dll.a and libssl.dll.a.
978 On VMS, shareable images (VMS speak for shared libraries) are named
979 ossl$libcrypto0101_shr.exe and ossl$libssl0101_shr.exe. However, when
980 OpenSSL is specifically built for 32-bit pointers, the shareable images
981 are named ossl$libcrypto0101_shr32.exe and ossl$libssl0101_shr32.exe
982 instead, and when built for 64-bit pointers, they are named
983 ossl$libcrypto0101_shr64.exe and ossl$libssl0101_shr64.exe.
985 Note on random number generation
986 --------------------------------
988 Availability of cryptographically secure random numbers is required for
989 secret key generation. OpenSSL provides several options to seed the
990 internal PRNG. If not properly seeded, the internal PRNG will refuse
991 to deliver random bytes and a "PRNG not seeded error" will occur.
992 On systems without /dev/urandom (or similar) device, it may be necessary
993 to install additional support software to obtain a random seed.
994 Please check out the manual pages for RAND_add(), RAND_bytes(), RAND_egd(),
995 and the FAQ for more information.
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