Options to configure

There are a number of options to configure which you can use to control how the Kerberos distribution is built.

Most commonly used options

–help

Provides help to configure. This will list the set of commonly used options for building Kerberos.

–prefix=PREFIX

By default, Kerberos will install the package’s files rooted at /usr/local. If you desire to place the binaries into the directory PREFIX, use this option.

–exec-prefix=EXECPREFIX

This option allows one to separate the architecture independent programs from the host-dependent files (configuration files, manual pages). Use this option to install architecture-dependent programs in EXECPREFIX. The default location is the value of specified by –prefix option.

–localstatedir=LOCALSTATEDIR

This option sets the directory for locally modifiable single-machine data. In Kerberos, this mostly is useful for setting a location for the KDC data files, as they will be installed in LOCALSTATEDIR/krb5kdc, which is by default PREFIX/var/krb5kdc.

–with-netlib[=libs]

Allows for suppression of or replacement of network libraries. By default, Kerberos V5 configuration will look for -lnsl and -lsocket. If your operating system has a broken resolver library or fails to pass the tests in src/tests/resolv, you will need to use this option.

–with-tcl=TCLPATH

Some of the unit-tests in the build tree rely upon using a program in Tcl. The directory specified by TCLPATH specifies where the Tcl header file (TCLPATH/include/tcl.h) as well as where the Tcl library (TCLPATH/lib) should be found.

–enable-dns-for-realm

Enable the use of DNS to look up a host’s Kerberos realm, or a realm’s KDCs, if the information is not provided in krb5.conf. See Hostnames for KDCs for information about using DNS to locate the KDCs, and Mapping hostnames onto Kerberos realms for information about using DNS to determine the default realm. By default, DNS lookups are enabled for the former but not for the latter.

–with-system-et

Use an installed version of the error-table (et) support software, the compile_et program, the com_err.h header file and the com_err library. If these are not in the default locations, you may wish to specify CPPFLAGS=-I/some/dir and LDFLAGS=-L/some/other/dir options at configuration time as well.

If this option is not given, a version supplied with the Kerberos sources will be built and installed along with the rest of the Kerberos tree, for Kerberos applications to link against.

–with-system-ss

Use an installed version of the subsystem command-line interface software, the mk_cmds program, the ss/ss.h header file and the ss library. If these are not in the default locations, you may wish to specify CPPFLAGS=-I/some/dir and LDFLAGS=-L/some/other/dir options at configuration time as well. See also the SS_LIB option.

If this option is not given, the ss library supplied with the Kerberos sources will be compiled and linked into those programs that need it; it will not be installed separately.

–with-system-db

Use an installed version of the Berkeley DB package, which must provide an API compatible with version 1.85. This option is unsupported and untested. In particular, we do not know if the database-rename code used in the dumpfile load operation will behave properly.

If this option is not given, a version supplied with the Kerberos sources will be built and installed. (We are not updating this version at this time because of licensing issues with newer versions that we haven’t investigated sufficiently yet.)

Environment variables

CC=COMPILER

Use COMPILER as the C compiler.

CFLAGS=FLAGS

Use FLAGS as the default set of C compiler flags.

CPPFLAGS=CPPOPTS

Use CPPOPTS as the default set of C preprocessor flags. The most common use of this option is to select certain #define’s for use with the operating system’s include files.

CPP=CPP

C preprocessor to use. (e.g. CPP='gcc -E')

DB_HEADER=headername

If db.h is not the correct header file to include to compile against the Berkeley DB 1.85 API, specify the correct header file name with this option. For example, DB_HEADER=db3/db_185.h.

DB_LIB=libs...

If -ldb is not the correct library specification for the Berkeley DB library version to be used, override it with this option. For example, DB_LIB=-ldb-3.3.

LD=LINKER

Use LINKER as the default loader if it should be different from C compiler as specified above.

LDFLAGS=LDOPTS

This option informs the linker where to get additional libraries (e.g. -L<lib dir>).

LIBS=LDNAME

This option allows one to specify libraries to be passed to the linker (e.g. -l<library>)

SS_LIB=libs...

If -lss is not the correct way to link in your installed ss library, for example if additional support libraries are needed, specify the correct link options here. Some variants of this library are around which allow for Emacs-like line editing, but different versions require different support libraries to be explicitly specified.

This option is ignored if –with-system-ss is not specified.

CXX

C++ compiler command

CXXFLAGS

C++ compiler flags

YACC

The ‘Yet Another C Compiler’ implementation to use. Defaults to the first program found out of: ‘bison -y‘, ‘byacc‘, ‘yacc‘.

YFLAGS

The list of arguments that will be passed by default to $YACC. This script will default YFLAGS to the empty string to avoid a default value of -d given by some make applications.

Fine tuning of the installation directories

–bindir=DIR

User executables. Defaults to EXECPREFIX/bin, where EXECPREFIX is the path specified by –exec-prefix configuration option.

–sbindir=DIR

System admin executables. Defaults to EXECPREFIX/sbin, where EXECPREFIX is the path specified by –exec-prefix configuration option.

–libexecdir=DIR

Program executables. Defaults to EXECPREFIX/libexec, where EXECPREFIX is the path specified by –exec-prefix configuration option.

–sysconfdir=DIR

Read-only single-machine data. Defaults to PREFIX/etc, where PREFIX is the path specified by –prefix configuration option.

–sharedstatedir=DIR

Modifiable architecture-independent data. Defaults to PREFIX/com, where PREFIX is the path specified by –prefix configuration option.

–libdir=DIR

Object code libraries. Defaults to EXECPREFIX/lib, where EXECPREFIX is the path specified by –exec-prefix configuration option.

–includedir=DIR

C header files. Defaults to PREFIX/include, where PREFIX is the path specified by –prefix configuration option.

–oldincludedir=DIR

C header files for non-gcc. Default to /usr/include.

–datarootdir=DATAROOTDIR

Read-only architecture-independent data root. Defaults to PREFIX/share, where PREFIX is the path specified by –prefix configuration option.

–datadir=DIR

Read-only architecture-independent data. Defaults to path specified by –datarootdir configuration option.

–infodir=DIR

Info documentation. Defaults to DATAROOTDIR/info, where DATAROOTDIR is the path specified by –datarootdir configuration option.

–localedir=DIR

Locale-dependent data. Defaults to DATAROOTDIR/locale, where DATAROOTDIR is the path specified by –datarootdir configuration option.

–mandir=DIR

Man documentation. Defaults to DATAROOTDIR/man, where DATAROOTDIR is the path specified by –datarootdir configuration option.

–docdir=DOCDIR

Documentation root. Defaults to DATAROOTDIR/doc/krb5, where DATAROOTDIR is the path specified by –datarootdir configuration option.

–htmldir=DIR

HTML documentation. Defaults to path specified by –docdir configuration option.

–dvidir=DIR

DVI documentation. Defaults to path specified by –docdir configuration option.

–pdfdir=DIR

PDF documentation. Defaults to path specified by –docdir configuration option.

–psdir=DIR

PostScript documentation. Defaults to path specified by –docdir configuration option.

Program names

–program-prefix=PREFIX

Prepend PREFIX to the names of the programs when installing them. For example, specifying --program-prefix=mit- at the configure time will cause the program named abc to be installed as mit-abc.

–program-suffix=SUFFIX

Append SUFFIX to the names of the programs when installing them. For example, specifying --program-suffix=-mit at the configure time will cause the program named abc to be installed as abc-mit.

–program-transform-name=PROGRAM

Run sed -e PROGRAM on installed program names. (PROGRAM is a sed script).

System types

–build=BUILD

Configure for building on BUILD (e.g. --build=x86_64-linux-gnu).

–host=HOST

Cross-compile to build programs to run on HOST (e.g. --host=x86_64-linux-gnu). By default, Kerberos V5 configuration will look for “build” option.

Optional features

–disable-FEATURE

Do not include FEATURE (same as –enable-FEATURE=no).

–disable-option-checking

Ignore unrecognized –enable/–with options.

–enable-FEATURE[=ARG]

Include FEATURE [ARG=yes].

–enable-dns-for-realm

Enable DNS lookups of Kerberos realm names.

–enable-maintainer-mode

Enable rebuilding of source files, Makefiles, etc.

–disable-delayed-initialization

Initialize library code when loaded. Defaults to delay until first use.

–disable-thread-support

Don’t enable thread support. Defaults to enabled.

–disable-rpath

Suppress run path flags in link lines.

–enable-athena

Build with MIT Project Athena configuration.

–enable-fortuna-test

Build to test Fortuna PRNG.

–disable-kdc-lookaside-cache

Disable the cache which detects client retransmits.

–disable-pkinit

Disable PKINIT plugin support.

Optional packages

–with-PACKAGE[=ARG]

Use PACKAGE (e.g. --with-imap). The default value of ARG is yes.

–without-PACKAGE

Do not use PACKAGE (same as --with-PACKAGE=no) (e.g. --without-libedit).

–with-size-optimizations

Enable a few optimizations to reduce code size possibly at some run-time cost.

–with-hesiod=path

Compile with Hesiod support. The path points to the Hesiod directory. By default Hesiod is unsupported.

–with-ldap

Compile OpenLDAP database backend module.

–with-vague-errors

Do not send helpful errors to client. For example, if the KDC should return only vague error codes to clients.

–with-crypto-impl=IMPL

Use specified crypto implementation (e.g. –with-crypto=openssl). Default is a native MIT Kerberos implementation builtin. The other currently implemented crypto backends are openssl and nss. (See MIT Kerberos Features)

–with-prng-alg=ALG

Use specified PRNG algorithm. For example, to use the OS native prng specify --with-prng-alg=os.

Default is the fortuna PRNG algorithm. For the nss crypto backend use one must explicitly specify --with-prng-alg=nss. (See MIT Kerberos Features)

–with-kdc-kdb-update

Update the KDC database with the information about

• the last successful authentication;
• the last failed authentication attempt;
• the number of the failed authentication attempts.

By default the kdb is not updated with this information.

–with-system-verto

Use an installed version of libverto. If the libverto header and library are not in default locations, you may wish to specify CPPFLAGS=-I/some/dir and LDFLAGS=-L/some/other/dir options at configuration time as well.

If this option is not given, the build system will try to detect an installed version of libverto and use it if it is found. Otherwise, a version supplied with the Kerberos sources will be built and installed. The built-in version does not contain the full set of back-end modules and is not a suitable general replacement for the upstream version, but will work for the purposes of Kerberos.

Specifying –without-system-verto will cause the built-in version of libverto to be used unconditionally.

Examples

For example, in order to configure Kerberos on a Solaris machine using the suncc compiler with the optimizer turned on, run the configure script with the following options:

% ./configure CC=suncc CFLAGS=-O

For a slightly more complicated example, consider a system where several packages to be used by Kerberos are installed in /usr/foobar, including Berkeley DB 3.3, and an ss library that needs to link against the curses library. The configuration of Kerberos might be done thus:

./configure CPPFLAGS=-I/usr/foobar/include LDFLAGS=-L/usr/foobar/lib --with-system-et --with-system-ss --with-system-db  SS_LIB='-lss -lcurses'  DB_HEADER=db3/db_185.h DB_LIB=-ldb-3.3