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MAKE.CONF(5) File Formats Manual MAKE.CONF(5)

make.conf — system build information

The file make.conf contains system-wide settings that will apply to every build using make(1) and the standard sys.mk file. This is achieved as follows: make(1) processes the system makefile sys.mk before any other file by default, and sys.mk includes make.conf.

The file make.conf uses the standard makefile syntax. However, make.conf should not specify any dependencies to make(1). Instead, make.conf is to set make(1) variables that control the actions of other makefiles.

The default location of make.conf is /etc/make.conf, though an alternative location can be specified in the make(1) variable __MAKE_CONF. You may need to override the location of make.conf if the system-wide settings are not suitable for a particular build. For instance, setting __MAKE_CONF to /dev/null effectively resets all build controls to their defaults.

The primary purpose of make.conf is to control the compilation of the FreeBSD sources, documentation, and ported applications, which are usually found in /usr/src, /usr/doc, and /usr/ports. As a rule, the system administrator creates make.conf when the values of certain control variables need to be changed from their defaults.

The system build procedures occur in four broad areas: the world, the kernel, documentation and ports. Variables set in make.conf may be applicable in one, two, or all four of these areas. In addition, control variables can be specified for a particular build via the -D option of make(1) or in environ(7). In the case of world and kernel builds it is possible to put these variables into src.conf(5) instead of make.conf. This way the environment for documentation and ports builds is not polluted by unrelated variables.

The following lists provide a name and short description for each variable you can use during the indicated builds. The values of variables flagged as bool are ignored; the variable being set at all (even to “FALSE” or “NO”) causes it to be treated as if it were set.

The following list provides a name and short description for variables that are used for all builds, or are used by the makefiles for things other than builds.

ALWAYS_CHECK_MAKE
(bool) Instructs the top-level makefile in the source tree (normally /usr/src) to always check if make(1) is up-to-date. Normally this is only done for the world and buildworld targets to handle upgrades from older versions of FreeBSD.
CFLAGS
(str) Controls the compiler setting when compiling C code. Optimization levels other than -O and -O2 are not supported.
CPUTYPE
(str) Controls which processor should be targeted for generated code. This controls processor-specific optimizations in certain code (currently only OpenSSL) as well as modifying the value of CFLAGS and COPTFLAGS to contain the appropriate optimization directive to cc(1). The automatic setting of CFLAGS may be overridden using the NO_CPU_CFLAGS variable. Refer to /usr/share/examples/etc/make.conf for a list of recognized CPUTYPE options.
CXXFLAGS
(str) Controls the compiler settings when compiling C++ code. CXXFLAGS is initially set to the value of CFLAGS. If you want to add to the CXXFLAGS value, use “+=” instead of “=”.
DTC
(str) Select the compiler for DTS (Device Tree Syntax) file. DTC is initially set to the value of dtc
INSTALL
(str) the default install command. To install only files for which the target differs or does not exist, use 
INSTALL+= -C
Note that some makefiles (including those in /usr/share/mk) may hardcode options for the supplied install command.
LOCAL_DIRS
(str) List any directories that should be entered when doing make's in /usr/src in this variable.
MAKE_SHELL
(str) Controls the shell used internally by make(1) to process the command scripts in makefiles. sh(1), ksh(1), and csh(1) all currently supported.

MAKE_SHELL?=sh
(str) Set this to “-L” to cause mtree(8) to follow symlinks.
NO_CPU_CFLAGS
(str) Setting this variable will prevent CPU specific compiler flags from being automatically added to CFLAGS during compile time.
NO_DOCUPDATE
(bool) Set this to not update the doc tree during “make update”.
NO_PORTSUPDATE
(bool) Set this to not update the ports tree during “make update”.
SVN_UPDATE
(bool) Set this to use svn(1) or svnlite(1) to update your src tree with “make update”. Note that you can set SVN to the full path of a svn(1) binary.

The following list provides a name and short description for variables that are only used doing a kernel build:

BOOTWAIT
(int) Controls the amount of time the kernel waits for a console keypress before booting the default kernel. The value is approximately milliseconds. Keypresses are accepted by the BIOS before booting from disk, making it possible to give custom boot parameters even when this is set to 0.
COPTFLAGS
(str) Controls the compiler settings when building the kernel. Optimization levels above [-O (-O2, ...)] are not guaranteed to work.
KERNCONF
(str) Controls which kernel configurations will be built by “${MAKE} buildkernel” and installed by “${MAKE} installkernel”. For example, 
KERNCONF=MINE DEBUG GENERIC OTHERMACHINE

will build the kernels specified by the config files MINE, DEBUG, GENERIC, and OTHERMACHINE, and install the kernel specified by the config file MINE. It defaults to GENERIC.

MODULES_OVERRIDE
(str) Set to a list of modules to build instead of all of them.
NO_KERNELCLEAN
(bool) Set this to skip running “${MAKE} clean” during “${MAKE} buildkernel”.
NO_KERNELCONFIG
(bool) Set this to skip running config(8) during “${MAKE} buildkernel”.
NO_KERNELOBJ
(bool) Set this to skip running “${MAKE} obj” during “${MAKE} buildkernel”.
NO_MODULES
(bool) Set to not build modules with the kernel.
PORTS_MODULES
Set this to the list of ports you wish to rebuild every time the kernel is built.
WITHOUT_MODULES
(str) Set to a list of modules to exclude from the build. This provides a somewhat easier way to exclude modules you are certain you will never need than specifying MODULES_OVERRIDE. This is applied MODULES_OVERRIDE.

The following list provides a name and short description for variables that are used during the world build:

BOOT_COMCONSOLE_PORT
(str) The port address to use for the console if the boot blocks have been configured to use a serial console instead of the keyboard/video card.
BOOT_COMCONSOLE_SPEED
(int) The baud rate to use for the console if the boot blocks have been configured to use a serial console instead of the keyboard/video card.
BOOT_PXELDR_ALWAYS_SERIAL
(bool) Compile in the code into pxeboot(8) that forces the use of a serial console. This is analogous to the -h option in boot(8) blocks.
BOOT_PXELDR_PROBE_KEYBOARD
(bool) Compile in the code into pxeboot(8) that probes the keyboard. If no keyboard is found, boot with the dual console configuration. This is analogous to the -D option in boot(8) blocks.
ENABLE_SUID_K5SU
(bool) Set this if you wish to use the ksu utility. Otherwise, it will be installed without the set-user-ID bit set.
ENABLE_SUID_NEWGRP
(bool) Set this to install newgrp(1) with the set-user-ID bit set. Otherwise, newgrp(1) will not be able to change users' groups.
LOADER_TFTP_SUPPORT
(bool) By default the pxeboot(8) loader retrieves the kernel via NFS. Defining this and recompiling /usr/src/stand will cause it to retrieve the kernel via TFTP. This allows pxeboot(8) to load a custom BOOTP diskless kernel yet still mount the server's / rather than load the server's kernel.
LOADER_FIREWIRE_SUPPORT
(bool) Defining this and recompiling /usr/src/stand/i386 will add dcons(4) console driver to loader(8) and allow access over FireWire(IEEE1394) using dconschat(8). Currently, only i386 and amd64 are supported.
MALLOC_PRODUCTION
(bool) Set this to disable assertions and statistics gathering in malloc(3). It also defaults the A and J runtime options to off. Disabled by default on -CURRENT.
MAN_ARCH
(str) Space-delimited list of one or more MACHINE and/or MACHINE_ARCH values for which section 4 man pages will be installed. The special value ‘all’ installs all available architectures. The default is the MACHINE and MACHINE_ARCH being built.
MODULES_WITH_WORLD
(bool) Set to build modules with the system instead of the kernel.
NO_CLEAN
(bool) Set this to disable cleaning during “make buildworld”. This should not be set unless you know what you are doing.
NO_CLEANDIR
(bool) Set this to run “${MAKE} clean” instead of “${MAKE} cleandir”.
WITH_MANCOMPRESS
(defined) Set to install manual pages compressed.
WITHOUT_MANCOMPRESS
(defined) Set to install manual pages uncompressed.
NO_SHARE
(bool) Set to not build in the share subdir.
NO_SHARED
(bool) Set to build /bin and /sbin statically linked, this can be bad. If set, every utility that uses bsd.prog.mk will be linked statically.
PPP_NO_NAT
(bool) Build ppp(8) without support for network address translation (NAT).
PPP_NO_NETGRAPH
(bool) Set to build ppp(8) without support for Netgraph.
PPP_NO_RADIUS
(bool) Set to build ppp(8) without support for RADIUS.
PPP_NO_SUID
(bool) Set to disable the installation of ppp(8) as a set-user-ID root program.
SENDMAIL_ADDITIONAL_MC
(str) Additional .mc files which should be built into .cf files at build time. The value should include the full path to the .mc file(s), e.g., /etc/mail/foo.mc, /etc/mail/bar.mc.
SENDMAIL_ALIASES
(str) List of aliases(5) files to rebuild when using /etc/mail/Makefile. The default value is /etc/mail/aliases.
SENDMAIL_CFLAGS
(str) Flags to pass to the compile command when building sendmail(8). The SENDMAIL_* flags can be used to provide SASL support with setting such as: 
SENDMAIL_CFLAGS=-I/usr/local/include -DSASL
SENDMAIL_LDFLAGS=-L/usr/local/lib
SENDMAIL_LDADD=-lsasl
SENDMAIL_CF_DIR
(str) Override the default location for the m4(1) configuration files used to build a .cf file from a .mc file.
SENDMAIL_DPADD
(str) Extra dependencies to add when building sendmail(8).
SENDMAIL_LDADD
(str) Flags to add to the end of the ld(1) command when building sendmail(8).
SENDMAIL_LDFLAGS
(str) Flags to pass to the ld(1) command when building sendmail(8).
SENDMAIL_M4_FLAGS
(str) Flags passed to m4(1) when building a .cf file from a .mc file.
SENDMAIL_MAP_PERMS
(str) Mode to use when generating alias and map database files using /etc/mail/Makefile. The default value is 0640.
SENDMAIL_MAP_SRC
(str) Additional maps to rebuild when using /etc/mail/Makefile. The access, bitdomain, domaintable, genericstable, mailertable, uucpdomain, and virtusertable maps are always rebuilt if they exist.
SENDMAIL_MAP_TYPE
(str) Database map type to use when generating map database files using /etc/mail/Makefile. The default value is hash. The alternative is btree.
SENDMAIL_MC
(str) The default m4(1) configuration file to use at install time. The value should include the full path to the .mc file, e.g., /etc/mail/myconfig.mc. Use with caution as a make install will overwrite any existing /etc/mail/sendmail.cf. Note that SENDMAIL_CF is now deprecated.
SENDMAIL_SET_USER_ID
(bool) If set, install sendmail(8) as a set-user-ID root binary instead of a set-group-ID binary and do not install /etc/mail/submit.{cf,mc}. Use of this flag is not recommended and the alternative advice in /etc/mail/README should be followed instead if at all possible.
SENDMAIL_START_SCRIPT
(str) The script used by /etc/mail/Makefile to start, stop, and restart sendmail(8). The default value is /etc/rc.sendmail. This value should match the “mta_start_script” setting in rc.conf(5).
SENDMAIL_SUBMIT_MC
(str) The default m4(1) configuration file for mail submission to use at install time. The value should include the full path to the .mc file, e.g., /etc/mail/mysubmit.mc. Use with caution as a make install will overwrite any existing /etc/mail/submit.cf.
TOP_TABLE_SIZE
(int) top(1) uses a hash table for the user names. The size of this hash can be tuned to match the number of local users. The table size should be a prime number approximately twice as large as the number of lines in /etc/passwd. The default number is 20011.
WANT_FORCE_OPTIMIZATION_DOWNGRADE
(int) Causes the system compiler to be built such that it forces high optimization levels to a lower one. cc(1) -O2 and above is known to trigger known optimizer bugs at various times. The value assigned is the highest optimization value used.

The following list provides a name and short description for variables that are used when building documentation.

DISTDIR
(str) Where distfiles are kept. Normally, this is distfiles in PORTSDIR.
DOC_LANG
(str) The list of languages and encodings to build and install.
PRINTERDEVICE
(str) The default format for system documentation, depends on your printer. This can be set to “ascii” for simple printers, or “ps” for postscript or graphics printers with a ghostscript filter, or both.

Several make variables can be set that affect the building of ports. These variables and their effects are documented in ports(7), ${PORTSDIR}/Mk/* and the FreeBSD Porter's Handbook.

/etc/make.conf
 
/usr/doc/Makefile
 
/usr/ports/Makefile
 
/usr/share/examples/etc/make.conf
 
/usr/share/mk/sys.mk
 
/usr/src/Makefile
 
/usr/src/Makefile.inc1
 

cc(1), install(1), make(1), src.conf(5), style.Makefile(5), environ(7), ports(7), sendmail(8)

The make.conf file appeared sometime before FreeBSD 4.0.

This manual page was written by Mike W. Meyer <mwm@mired.org>.

Note, that MAKEOBJDIRPREFIX and MAKEOBJDIR are environment variables and should not be set in make.conf or as command line arguments to make(1), but in make's environment.

This manual page may occasionally be out of date with respect to the options currently available for use in make.conf. Please check the /usr/share/examples/etc/make.conf file for the latest options which are available.

September 27, 2018 FreeBSD-12.0