### Berkeley DB Reference Guide: Building Berkeley DB for UNIX/POSIX systems |

### Configuring Berkeley DB

There are several arguments you can specify when configuring Berkeley DB. Although only the Berkeley DB-specific ones are described here, most of the standard GNU autoconf arguments are available and supported. To see a complete list of possible arguments, specify the --help flag to the configure program.

The Berkeley DB specific arguments are as follows:

--disable-largefile
  Some systems, notably versions of HP/UX and Solaris, require special compile-time options in order to create files larger than 2^32 bytes. These options are automatically enabled when Berkeley DB is compiled. For this reason, binaries built on current versions of these systems may not run on earlier versions of the system because the library and system calls necessary for large files are not available. To disable building with these compile-time options, enter --disable-largefile as an argument to configure.
--disable-shared, --disable-static
  On systems supporting shared libraries, Berkeley DB builds both static and shared libraries by default. (Shared libraries are built using the GNU Project's Libtool distribution, which supports shared library builds on many (although not all) systems.) To not build shared libraries, configure using the --disable-shared argument. To not build static libraries, configure using the --disable-static argument.
--enable-compat185
  To compile or load Berkeley DB 1.85 applications against this release of the Berkeley DB library, enter --enable-compat185 as an argument to configure. This will include Berkeley DB 1.85 API compatibility code in the library.
--enable-cxx
  To build the Berkeley DB C++ API, enter --enable-cxx as an argument to configure.
--enable-debug
  To build Berkeley DB with -g as a compiler flag and with DEBUG #defined during compilation, enter --enable-debug as an argument to configure. This will create a Berkeley DB library and utilities with debugging symbols, as well as load various routines that can be called from a debugger to display pages, cursor queues, and so forth. If installed, the utilities will not be stripped. This argument should not be specified when configuring to build production binaries.
--enable-debug_rop
  To build Berkeley DB to output log records for read operations, enter --enable-debug_rop as an argument to configure. This argument should not be specified when configuring to build production binaries.
--enable-debug_wop
  To build Berkeley DB to output log records for write operations, enter --enable-debug_wop as an argument to configure. This argument should not be specified when configuring to build production binaries.
--enable-diagnostic
  To build Berkeley DB with run-time debugging checks, enter --enable-diagnostic as an argument to configure. This will cause a number of special checks to be performed when Berkeley DB is running. Applications built using this argument should not share database environments with applications built without this argument. This argument should not be specified when configuring to build production binaries.
--enable-dump185
  To convert Berkeley DB 1.85 (or earlier) databases to this release of Berkeley DB, enter --enable-dump185 as an argument to configure. This will build the db_dump185 utility, which can dump Berkeley DB 1.85 and 1.86 databases in a format readable by the Berkeley DB db_load utility.

  The system libraries with which you are loading the db_dump185 utility must already contain the Berkeley DB 1.85 library routines for this to work because the Berkeley DB distribution does not include them. If you are using a non-standard library for the Berkeley DB 1.85 library routines, you will have to change the Makefile that the configuration step creates to load the db_dump185 utility with that library.

--enable-java
  To build the Berkeley DB Java API, enter --enable-java as an argument to configure. To build Java, you must also build with shared libraries. Before configuring, you must set your PATH environment variable to include javac. Note that it is not sufficient to include a symbolic link to javac in your PATH because the configuration process uses the location of javac to determine the location of the Java include files (for example, jni.h). On some systems, additional include directories may be needed to process jni.h; see Changing compile or load options for more information.
--enable-posixmutexes
  To force Berkeley DB to use the POSIX pthread mutex interfaces for underlying mutex support, enter --enable-posixmutexes as an argument to configure. This is rarely necessary: POSIX mutexes will be selected automatically on systems where they are the preferred implementation.

  The --enable-posixmutexes configuration argument is normally used in two ways: First, when there are multiple mutex implementations available and the POSIX mutex implementation is not the preferred one (for example, on Solaris where the LWP mutexes are used by default). Second, by default the Berkeley DB library will only select the POSIX mutex implementation if it supports mutexes shared between multiple processes, as described for the pthread_condattr_setpshared and pthread_mutexattr_setpshared interfaces. The --enable-posixmutexes configuration argument can be used to force the selection of POSIX mutexes in this case, which can improve application performance significantly when the alternative mutex implementation is a non-blocking one (for example test-and-set assembly instructions). However, configuring to use POSIX mutexes when the implementation does not have inter-process support will only allow the creation of private database environments, that is, environments where the DB_PRIVATE flag is specified to the DB_ENV->open method.

  Specifying the --enable-posixmutexes configuration argument may require that Berkeley DB be linked with the -lpthread library.

--enable-rpc
  To build the Berkeley DB RPC client code and server utility, enter --enable-rpc as an argument to configure. The --enable-rpc argument requires that RPC libraries already be installed on your system.
--enable-smallbuild
  To build a small memory footprint version of the Berkeley DB library, enter --enable-smallbuild as an argument to configure. The --enable-smallbuild argument is equivalent to individually specifying --disable-cryptography, --disable-hash, --disable-queue, --disable-replication, --disable-statistics and --disable-verify, turning off cryptography support, the Hash and Queue access methods, database environment replication support and database verification support. See Building a small memory footprint library for more information.
--enable-tcl
  To build the Berkeley DB Tcl API, enter --enable-tcl as an argument to configure. This configuration argument expects to find Tcl's tclConfig.sh file in the /usr/local/lib directory. See the --with-tcl argument for instructions on specifying a non-standard location for the Tcl installation. See Loading Berkeley DB with Tcl for information on sites from which you can download Tcl and which Tcl versions are compatible with Berkeley DB. To build Tcl, you must also build with shared libraries.
--enable-test
  To build the Berkeley DB test suite, enter --enable-test as an argument to configure. To run the Berkeley DB test suite, you must also build the Tcl API. This argument should not be specified when configuring to build production binaries.
--enable-uimutexes
  To force Berkeley DB to use the UNIX International (UI) mutex interfaces for underlying mutex support, enter --enable-uimutexes as an argument to configure. This is rarely necessary: UI mutexes will be selected automatically on systems where they are the preferred implementation.

  The --enable-uimutexes configuration argument is normally used when there are multiple mutex implementations available and the UI mutex implementation is not the preferred one (for example, on Solaris where the LWP mutexes are used by default).

  Specifying the --enable-uimutexes configuration argument may require that Berkeley DB be linked with the -lthread library.

--enable-umrw
  Rational Software's Purify product and other run-time tools complain about uninitialized reads/writes of structure fields whose only purpose is padding, as well as when heap memory that was never initialized is written to disk. Specify the --enable-umrw argument during configuration to mask these errors. This argument should not be specified when configuring to build production binaries.
--with-mutex=MUTEX
  To force Berkeley DB to use a specific mutex implementation, configure with --with-mutex=MUTEX, where MUTEX is the mutex implementation you want. For example, --with-mutex=x86/gcc-assembly will configure Berkeley DB to use the x86 GNU gcc compiler based test-and-set assembly mutexes. This is rarely necessary and should be done only when the default configuration selects the wrong mutex implementation. A list of available mutex implementations can be found in the distribution file dist/aclocal/mutex.ac.
--with-mutexalign=ALIGNMENT
  To force Berkeley DB to use a specific mutex byte alignment, configure with --with-mutexalignment=ALIGNMENT. For example, --with-mutexalignment=64 will configure Berkeley DB to align mutexes at 64-byte alignments, ensuring no two mutexes use the same cache line on machines with 64-byte cache alignment. This is only useful when performance tuning Berkeley DB for large multiprocessor systems.
--with-rpm=ARCHIVE
  To build Berkeley DB as an RPM software package, configure with --with-rpm=ARCHIVE, where ARCHIVE is the path of gzipped tar archive Berkeley DB distribution file. This configuration argument will create an RPM specification file from which the RPM software package can be built, using the "make" command.
--with-tcl=DIR
  To build the Berkeley DB Tcl API, enter --with-tcl=DIR, replacing DIR with the directory in which the Tcl tclConfig.sh file may be found. See Loading Berkeley DB with Tcl for information on sites from which you can download Tcl and which Tcl versions are compatible with Berkeley DB. To build Tcl, you must also build with shared libraries.
--with-uniquename=NAME
  To build Berkeley DB with unique symbol names (in order to avoid conflicts with other application modules or libraries), enter --with-uniquename=NAME, replacing NAME with a string that to be appended to every Berkeley DB symbol. If "=NAME" is not specified, a default value of "_MAJORMINOR" is used, where MAJORMINOR is the major and minor release numbers of the Berkeley DB release. See Building with multiple versions of Berkeley DB for more information.

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