1 .. _options2configure:
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3 Options to *configure*
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4 ======================
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6 There are a number of options to configure which you can use to
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7 control how the Kerberos distribution is built.
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9 Most commonly used options
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10 --------------------------
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13 Provides help to configure. This will list the set of commonly
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14 used options for building Kerberos.
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16 **--prefix=**\ *PREFIX*
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17 By default, Kerberos will install the package's files rooted at
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18 ``/usr/local``. If you desire to place the binaries into the
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19 directory *PREFIX*, use this option.
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21 **--exec-prefix=**\ *EXECPREFIX*
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22 This option allows one to separate the architecture independent
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23 programs from the host-dependent files (configuration files,
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24 manual pages). Use this option to install architecture-dependent
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25 programs in *EXECPREFIX*. The default location is the value of
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26 specified by **--prefix** option.
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28 **--localstatedir=**\ *LOCALSTATEDIR*
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29 This option sets the directory for locally modifiable
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30 single-machine data. In Kerberos, this mostly is useful for
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31 setting a location for the KDC data files, as they will be
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32 installed in ``LOCALSTATEDIR/krb5kdc``, which is by default
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33 ``PREFIX/var/krb5kdc``.
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35 **--with-netlib**\ [=\ *libs*]
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36 Allows for suppression of or replacement of network libraries. By
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37 default, Kerberos V5 configuration will look for ``-lnsl`` and
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38 ``-lsocket``. If your operating system has a broken resolver
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39 library or fails to pass the tests in ``src/tests/resolv``, you
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40 will need to use this option.
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42 **--with-tcl=**\ *TCLPATH*
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43 Some of the unit-tests in the build tree rely upon using a program
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44 in Tcl. The directory specified by *TCLPATH* specifies where the
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45 Tcl header file (TCLPATH/include/tcl.h) as well as where the Tcl
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46 library (TCLPATH/lib) should be found.
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48 **--enable-dns-for-realm**
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49 Enable the use of DNS to look up a host's Kerberos realm, or a
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50 realm's KDCs, if the information is not provided in
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51 :ref:`krb5.conf(5)`. See :ref:`kdc_hostnames` for information
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52 about using DNS to locate the KDCs, and :ref:`mapping_hostnames`
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53 for information about using DNS to determine the default realm.
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54 By default, DNS lookups are enabled for the former but not for the
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57 **--with-system-et**
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58 Use an installed version of the error-table (et) support software,
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59 the compile_et program, the com_err.h header file and the com_err
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60 library. If these are not in the default locations, you may wish
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61 to specify ``CPPFLAGS=-I/some/dir`` and
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62 ``LDFLAGS=-L/some/other/dir`` options at configuration time as
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65 If this option is not given, a version supplied with the Kerberos
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66 sources will be built and installed along with the rest of the
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67 Kerberos tree, for Kerberos applications to link against.
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69 **--with-system-ss**
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70 Use an installed version of the subsystem command-line interface
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71 software, the mk_cmds program, the ``ss/ss.h`` header file and the
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72 ss library. If these are not in the default locations, you may
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73 wish to specify ``CPPFLAGS=-I/some/dir`` and
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74 ``LDFLAGS=-L/some/other/dir`` options at configuration time as
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75 well. See also the **SS_LIB** option.
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77 If this option is not given, the ss library supplied with the
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78 Kerberos sources will be compiled and linked into those programs
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79 that need it; it will not be installed separately.
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81 **--with-system-db**
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82 Use an installed version of the Berkeley DB package, which must
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83 provide an API compatible with version 1.85. This option is
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84 unsupported and untested. In particular, we do not know if the
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85 database-rename code used in the dumpfile load operation will
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88 If this option is not given, a version supplied with the Kerberos
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89 sources will be built and installed. (We are not updating this
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90 version at this time because of licensing issues with newer
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91 versions that we haven't investigated sufficiently yet.)
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94 Environment variables
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95 ---------------------
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98 Use *COMPILER* as the C compiler.
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100 **CFLAGS=**\ *FLAGS*
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101 Use *FLAGS* as the default set of C compiler flags.
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103 **CPPFLAGS=**\ *CPPOPTS*
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104 Use *CPPOPTS* as the default set of C preprocessor flags. The
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105 most common use of this option is to select certain #define's for
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106 use with the operating system's include files.
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109 C preprocessor to use. (e.g. ``CPP='gcc -E'``)
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111 **DB_HEADER=**\ *headername*
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112 If db.h is not the correct header file to include to compile
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113 against the Berkeley DB 1.85 API, specify the correct header file
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114 name with this option. For example, ``DB_HEADER=db3/db_185.h``.
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116 **DB_LIB=**\ *libs*...
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117 If ``-ldb`` is not the correct library specification for the
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118 Berkeley DB library version to be used, override it with this
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119 option. For example, ``DB_LIB=-ldb-3.3``.
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122 Use *LINKER* as the default loader if it should be different from
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123 C compiler as specified above.
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125 **LDFLAGS=**\ *LDOPTS*
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126 This option informs the linker where to get additional libraries
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127 (e.g. ``-L<lib dir>``).
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129 **LIBS=**\ *LDNAME*
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130 This option allows one to specify libraries to be passed to the
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131 linker (e.g. ``-l<library>``)
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133 **SS_LIB=**\ *libs*...
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134 If ``-lss`` is not the correct way to link in your installed ss
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135 library, for example if additional support libraries are needed,
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136 specify the correct link options here. Some variants of this
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137 library are around which allow for Emacs-like line editing, but
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138 different versions require different support libraries to be
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139 explicitly specified.
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141 This option is ignored if **--with-system-ss** is not specified.
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144 C++ compiler command
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150 The 'Yet Another C Compiler' implementation to use. Defaults to
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151 the first program found out of: '`bison -y`', '`byacc`',
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155 The list of arguments that will be passed by default to $YACC.
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156 This script will default YFLAGS to the empty string to avoid a
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157 default value of ``-d`` given by some make applications.
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160 Fine tuning of the installation directories
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161 -------------------------------------------
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163 **--bindir=**\ *DIR*
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164 User executables. Defaults to ``EXECPREFIX/bin``, where
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165 *EXECPREFIX* is the path specified by **--exec-prefix**
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166 configuration option.
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168 **--sbindir=**\ *DIR*
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169 System admin executables. Defaults to ``EXECPREFIX/sbin``, where
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170 *EXECPREFIX* is the path specified by **--exec-prefix**
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171 configuration option.
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173 **--libexecdir=**\ *DIR*
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174 Program executables. Defaults to ``EXECPREFIX/libexec``, where
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175 *EXECPREFIX* is the path specified by **--exec-prefix**
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176 configuration option.
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178 **--sysconfdir=**\ *DIR*
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179 Read-only single-machine data. Defaults to ``PREFIX/etc``, where
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180 *PREFIX* is the path specified by **--prefix** configuration
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183 **--sharedstatedir=**\ *DIR*
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184 Modifiable architecture-independent data. Defaults to
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185 ``PREFIX/com``, where *PREFIX* is the path specified by
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186 **--prefix** configuration option.
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188 **--libdir=**\ *DIR*
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189 Object code libraries. Defaults to ``EXECPREFIX/lib``, where
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190 *EXECPREFIX* is the path specified by **--exec-prefix**
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191 configuration option.
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193 **--includedir=**\ *DIR*
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194 C header files. Defaults to ``PREFIX/include``, where *PREFIX* is
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195 the path specified by **--prefix** configuration option.
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197 **--oldincludedir=**\ *DIR*
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198 C header files for non-gcc. Default to ``/usr/include``.
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200 **--datarootdir=**\ *DATAROOTDIR*
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201 Read-only architecture-independent data root. Defaults to
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202 ``PREFIX/share``, where *PREFIX* is the path specified by
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203 **--prefix** configuration option.
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205 **--datadir=**\ *DIR*
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206 Read-only architecture-independent data. Defaults to path
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207 specified by **--datarootdir** configuration option.
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209 **--infodir=**\ *DIR*
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210 Info documentation. Defaults to ``DATAROOTDIR/info``, where
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211 *DATAROOTDIR* is the path specified by **--datarootdir**
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212 configuration option.
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214 **--localedir=**\ *DIR*
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215 Locale-dependent data. Defaults to ``DATAROOTDIR/locale``, where
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216 *DATAROOTDIR* is the path specified by **--datarootdir**
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217 configuration option.
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219 **--mandir=**\ *DIR*
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220 Man documentation. Defaults to ``DATAROOTDIR/man``, where
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221 *DATAROOTDIR* is the path specified by **--datarootdir**
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222 configuration option.
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224 **--docdir=**\ *DOCDIR*
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225 Documentation root. Defaults to ``DATAROOTDIR/doc/krb5``, where
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226 *DATAROOTDIR* is the path specified by **--datarootdir**
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227 configuration option.
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229 **--htmldir=**\ *DIR*
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230 HTML documentation. Defaults to path specified by **--docdir**
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231 configuration option.
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233 **--dvidir=**\ *DIR*
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234 DVI documentation. Defaults to path specified by **--docdir**
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235 configuration option.
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237 **--pdfdir=**\ *DIR*
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238 PDF documentation. Defaults to path specified by **--docdir**
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239 configuration option.
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241 **--psdir=**\ *DIR*
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242 PostScript documentation. Defaults to path specified by
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243 **--docdir** configuration option.
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249 **--program-prefix=**\ *PREFIX*
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250 Prepend *PREFIX* to the names of the programs when installing
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251 them. For example, specifying ``--program-prefix=mit-`` at the
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252 configure time will cause the program named ``abc`` to be
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253 installed as ``mit-abc``.
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255 **--program-suffix=**\ *SUFFIX*
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256 Append *SUFFIX* to the names of the programs when installing them.
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257 For example, specifying ``--program-suffix=-mit`` at the configure
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258 time will cause the program named ``abc`` to be installed as
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261 **--program-transform-name=**\ *PROGRAM*
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262 Run ``sed -e PROGRAM`` on installed program names. (*PROGRAM* is a
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269 **--build=**\ *BUILD*
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270 Configure for building on *BUILD*
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271 (e.g. ``--build=x86_64-linux-gnu``).
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273 **--host=**\ *HOST*
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274 Cross-compile to build programs to run on *HOST*
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275 (e.g. ``--host=x86_64-linux-gnu``). By default, Kerberos V5
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276 configuration will look for "build" option.
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282 **--disable-**\ *FEATURE*
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283 Do not include *FEATURE* (same as --enable-FEATURE=no).
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285 **--disable-option-checking**
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286 Ignore unrecognized --enable/--with options.
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288 **--enable-**\ *FEATURE*\ [=\ *ARG*]
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289 Include *FEATURE* [ARG=yes].
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291 **--enable-dns-for-realm**
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292 Enable DNS lookups of Kerberos realm names.
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294 **--enable-maintainer-mode**
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295 Enable rebuilding of source files, Makefiles, etc.
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297 **--disable-delayed-initialization**
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298 Initialize library code when loaded. Defaults to delay until
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301 **--disable-thread-support**
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302 Don't enable thread support. Defaults to enabled.
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304 **--disable-rpath**
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305 Suppress run path flags in link lines.
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307 **--enable-athena**
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308 Build with MIT Project Athena configuration.
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310 **--enable-fortuna-test**
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311 Build to test Fortuna PRNG.
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313 **--disable-kdc-lookaside-cache**
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314 Disable the cache which detects client retransmits.
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316 **--disable-pkinit**
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317 Disable PKINIT plugin support.
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323 **--with-**\ *PACKAGE*\ [=ARG\]
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324 Use *PACKAGE* (e.g. ``--with-imap``). The default value of *ARG*
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327 **--without-**\ *PACKAGE*
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328 Do not use *PACKAGE* (same as ``--with-PACKAGE=no``)
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329 (e.g. ``--without-libedit``).
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331 **--with-size-optimizations**
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332 Enable a few optimizations to reduce code size possibly at some
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335 **--with-hesiod=**\ *path*
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336 Compile with Hesiod support. The *path* points to the Hesiod
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337 directory. By default Hesiod is unsupported.
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340 Compile OpenLDAP database backend module.
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342 **--with-vague-errors**
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343 Do not send helpful errors to client. For example, if the KDC
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344 should return only vague error codes to clients.
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346 **--with-crypto-impl=**\ *IMPL*
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347 Use specified crypto implementation (e.g. **--with-crypto=**\
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348 *openssl*). Default is a native MIT Kerberos implementation
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349 ``builtin``. The other currently implemented crypto backends are
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350 ``openssl`` and ``nss``. (See :ref:`mitK5features`)
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352 **--with-prng-alg=**\ *ALG*
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353 Use specified PRNG algorithm. For example, to use the OS native
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354 prng specify ``--with-prng-alg=os``.
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356 Default is the ``fortuna`` PRNG algorithm. For the ``nss`` crypto
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357 backend use one must explicitly specify ``--with-prng-alg=nss``.
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358 (See :ref:`mitK5features`)
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360 **--with-kdc-kdb-update**
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361 Update the KDC database with the information about
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363 * the last successful authentication;
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364 * the last failed authentication attempt;
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365 * the number of the failed authentication attempts.
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367 By default the kdb is not updated with this information.
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369 **--with-system-verto**
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370 Use an installed version of libverto. If the libverto header and
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371 library are not in default locations, you may wish to specify
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372 ``CPPFLAGS=-I/some/dir`` and ``LDFLAGS=-L/some/other/dir`` options
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373 at configuration time as well.
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375 If this option is not given, the build system will try to detect
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376 an installed version of libverto and use it if it is found.
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377 Otherwise, a version supplied with the Kerberos sources will be
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378 built and installed. The built-in version does not contain the
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379 full set of back-end modules and is not a suitable general
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380 replacement for the upstream version, but will work for the
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381 purposes of Kerberos.
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383 Specifying **--without-system-verto** will cause the built-in
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384 version of libverto to be used unconditionally.
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390 For example, in order to configure Kerberos on a Solaris machine using
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391 the suncc compiler with the optimizer turned on, run the configure
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392 script with the following options::
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394 % ./configure CC=suncc CFLAGS=-O
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396 For a slightly more complicated example, consider a system where
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397 several packages to be used by Kerberos are installed in
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398 ``/usr/foobar``, including Berkeley DB 3.3, and an ss library that
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399 needs to link against the curses library. The configuration of
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400 Kerberos might be done thus::
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402 ./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
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