For example, if you inadvertently specify no-sslv2 rather than no-ssl2 no-ssl3, the script will configure with SSLv2 and without warning for the unknown no-sslv2. Note: if you specify a non-existent option, then the configure scripts will proceed without warning. You can disable protocols and provide other options through Configure and config, and the following lists some of them. SSLv2 is completely broken, and you should disable it during configuration. For example, from above, SSLv2 is enabled by default. OpenSSL has been around a long time, and it carries around a lot of cruft. However, you should perform a make clean to ensure the list of objects files is accurate after a reconfiguration. OpenSSL 1.1.0 and above performs the dependency step for you, so you should not see the message. Since you've disabled or enabled at least one algorithm, you need to do For OpenSSL 1.0.2 and below, it's required to update the standard distribution once configuration options change. If you are prompted to run make depend, then you must do so. NOTE: If in doubt, on Unix-ish systems use './config'. ] os/compilerīC-32 BS2000-OSD BSD-generic32 BSD-generic64 BSD-ia64 BSD-sparc64 BSD-sparcv8īSD-x86 BSD-x86-elf BSD-x86_64 Cygwin Cygwin-pre1.3 DJGPP MPE/iX-gcc OS2-EMX If you provide a option not known to configure or ask for help, then you get a brief help message: config shared no-ssl2 no-ssl3 enable-ec_nistp_64_gcc_128 -openssldir=/usr/local/ssl/macosx-圆4/ You can also configure on Darwin by exporting KERNEL_BITS: Mac OS X can have issues (it's often a neglected platform), and you will have to use Configure: You can usually use config and it will do the right thing (from Ubuntu 13.04, 圆4): config attempts to guess the triplet, so it's a lot like autotool's config.guess. The difference between is Configure properly handles the host-arch-compiler triplet, and config does not. You use Configure and config to tune the compile and installation process through options and switches. An example of using a similar configure line is presented in Using RPATHs. $cflags and $ldflags correspond to fields 2 and 6 in a configure line. If your platform is not listed, then use a similar platform and tune the $cflags and $ldflags by making a copy of the configure line and giving it its own name. You can run Configure LIST to see a list of available platforms. You should avoid custom build systems because they often miss details, like each architecture and platform has a unique opensslconf.h and bn.h generated by Configure. OpenSSL is configured for a particular platform with protocol and behavior options using Configure and config. This repository is updated every 15 minutes. The source is also available via a GitHub mirror. There are various versions including stable as well as unstable versions. The OpenSSL source code can be downloaded from OpenSSL Source Tarballs or any suitable ftp mirror. Also see Why aren't tools like 'autoconf' and 'libtool' used? in the OpenSSL FAQ. OpenSSL's build system does not rely upon autotools or libtool. If you are building OpenSSL 1.1.0 and above, then you will also need PERL 5.10 or higher (see README.PERL for details). Also, the second generation is more platform agnostic and uses templates to produce a final, top level build file ( Makefile, descrip.mms, what have you).Īfter you configure and build the library, you should always perform a make test to ensure the library performs as expected under its self tests. For example, the second generation abandons the monolithic Configure and places individual configurations in the Configurations directory. The instructions are similar, but not the same. Second is the build system for OpenSSL 1.1.0 and above. First is the build system used in OpenSSL 1.0.2 and below. There are two generations of build system. But the library proper must be built with a C compiler. Later, once the library is built, it is OK to create user programs with a C++ compiler. You must use a C compiler to build the OpenSSL library. Once configured, you use make to build the library. Configuration will allow the library to set up the recursive makefiles from. OpenSSL uses a custom build system to configure the library. If you have questions about what you are doing or seeing, then you should consult INSTALL since it contains the commands and specifies the behavior by the development team. The following page is a combination of the INSTALL file provided with the OpenSSL library and notes from the field.
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