.\" Copyright (c) 2000
.\"	Mike W. Meyer
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" $FreeBSD: head/share/man/man5/make.conf.5 297434 2016-03-30 23:50:23Z bdrewery $
.\"
.Dd March 29, 2016
.Dt MAKE.CONF 5
.Os
.Sh NAME
.Nm make.conf
.Nd system build information
.Sh DESCRIPTION
The file
.Nm
contains system-wide settings that will apply to every build using
.Xr make 1
and the standard
.Pa sys.mk
file.
This is achieved as follows:
.Xr make 1
processes the system makefile
.Pa sys.mk
before any other file by default, and
.Pa sys.mk
includes
.Nm .
.Pp
The file
.Nm
uses the standard makefile syntax.
However,
.Nm
should not specify any dependencies to
.Xr make 1 .
Instead,
.Nm
is to set
.Xr make 1
variables that control the actions of other makefiles.
.Pp
The default location of
.Nm
is
.Pa /etc/make.conf ,
though an alternative location can be specified in the
.Xr make 1
variable
.Va __MAKE_CONF .
You may need to override the location of
.Nm
if the system-wide settings are not suitable for a particular build.
For instance, setting
.Va __MAKE_CONF
to
.Pa /dev/null
effectively resets all build controls to their defaults.
.Pp
The primary purpose of
.Nm
is to control the compilation of the
.Fx
sources, documentation, and ported applications,
which are usually found in
.Pa /usr/src ,
.Pa /usr/doc ,
and
.Pa /usr/ports .
As a rule, the system administrator creates
.Nm
when the values of certain control variables need to be changed
from their defaults.
.Pp
The system build procedures occur in four broad areas:
the world, the kernel, documentation and ports.
Variables set in
.Nm
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
.Fl D
option of
.Xr make 1
or in
.Xr environ 7 .
.Pp
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
.Vt bool
are ignored; the variable being
set at all (even to
.Dq Li FALSE
or
.Dq Li NO )
causes it to
be treated as if it were set.
.Pp
The following list provides a name and short description for variables
that are used for all builds, or are used by the
.Pa makefiles
for things other than builds.
.Bl -tag -width Ar
.It Va ALWAYS_CHECK_MAKE
.Pq Vt bool
Instructs the top-level makefile in the source tree (normally
.Pa /usr/src )
to always check if
.Xr make 1
is up-to-date.
Normally this is only done for the world and buildworld targets to handle
upgrades from older versions of
.Fx .
.It Va CFLAGS
.Pq Vt str
Controls the compiler setting when compiling C code.
Optimization levels other than
.Fl O
and
.Fl O2
are not supported.
.It Va CPUTYPE
.Pq Vt 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
.Va CFLAGS
and
.Va COPTFLAGS
to contain the appropriate optimization directive to
.Xr cc 1 .
The automatic setting of
.Va CFLAGS
may be overridden using the
.Va NO_CPU_CFLAGS
variable.
Refer to
.Pa /usr/share/examples/etc/make.conf
for a list of recognized
.Va CPUTYPE
options.
.It Va CXXFLAGS
.Pq Vt str
Controls the compiler settings when compiling C++ code.
.Va CXXFLAGS
is initially set to the value of
.Va CFLAGS .
If you want to
add to the
.Va CXXFLAGS
value, use
.Dq Li +=
instead of
.Dq Li = .
.It Va INSTALL
.Pq Vt str
the default install command.
To install only files for which the target differs or does not exist, use
.Bd -literal -offset indent
INSTALL+= -C
.Ed
Note that some makefiles (including those in
.Pa /usr/share/mk )
may hardcode options for the supplied install command.
.It Va LOCAL_DIRS
.Pq Vt str
List any directories that should be entered when doing
make's in
.Pa /usr/src
in this variable.
.It Va MAKE_SHELL
.Pq Vt str
Controls the shell used internally by
.Xr make 1
to process the command scripts in makefiles.
.Xr sh 1 ,
.Xr ksh 1 ,
and
.Xr csh 1
all currently supported.
.Pp
.Dl "MAKE_SHELL?=sh"
.It Va MTREE_FOLLOWS_SYMLINKS
.Pq Vt str
Set this to
.Dq Fl L
to cause
.Xr mtree 8
to follow symlinks.
.It Va NO_CPU_CFLAGS
.Pq Vt str
Setting this variable will prevent CPU specific compiler flags
from being automatically added to
.Va CFLAGS
during compile time.
.It Va NO_DOCUPDATE
.Pq Vt bool
Set this to not update the doc tree during
.Dq Li "make update" .
.It Va NO_PORTSUPDATE
.Pq Vt bool
Set this to not update the ports tree during
.Dq Li "make update" .
.It Va SVN_UPDATE
.Pq Vt bool
Set this to use
.Xr svn 1
to update your
.Pa src
tree with
.Dq Li "make update" .
Note that since a subversion client is not included in the base system,
you will need to set
.Va SVN
to the full path of a
.Xr svn 1
binary.
.El
.Ss "BUILDING THE KERNEL"
The following list provides a name and short description for variables
that are only used doing a kernel build:
.Bl -tag -width Ar
.It Va BOOTWAIT
.Pq Vt 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.
.It Va COPTFLAGS
.Pq Vt str
Controls the compiler settings when building the
kernel.
Optimization levels above
.Oo Fl O ( O2 , No ...\& ) Oc
are not guaranteed to work.
.It Va KERNCONF
.Pq Vt str
Controls which kernel configurations will be
built by
.Dq Li "${MAKE} buildkernel"
and installed by
.Dq Li "${MAKE} installkernel" .
For example,
.Bd -literal -offset indent
KERNCONF=MINE DEBUG GENERIC OTHERMACHINE
.Ed
.Pp
will build the kernels specified by the config files
.Pa MINE , DEBUG , GENERIC ,
and
.Pa OTHERMACHINE ,
and install the kernel specified by the config file
.Pa MINE .
It defaults to
.Pa GENERIC .
.It Va MODULES_OVERRIDE
.Pq Vt str
Set to a list of modules to build instead of all of them.
.It Va NO_KERNELCLEAN
.Pq Vt bool
Set this to skip running
.Dq Li "${MAKE} clean"
during
.Dq Li "${MAKE} buildkernel" .
.It Va NO_KERNELCONFIG
.Pq Vt bool
Set this to skip running
.Xr config 8
during
.Dq Li "${MAKE} buildkernel" .
.It Va NO_KERNELOBJ
.Pq Vt bool
Set this to skip running
.Dq Li "${MAKE} obj"
during
.Dq Li "${MAKE} buildkernel" .
.It Va NO_MODULES
.Pq Vt bool
Set to not build modules with the kernel.
.It Va PORTS_MODULES
Set this to the list of ports you wish to rebuild every time the kernel
is built.
.It Va WITHOUT_MODULES
.Pq Vt 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
.Va MODULES_OVERRIDE .
This is applied
.Em after
.Va MODULES_OVERRIDE .
.El
.Ss "BUILDING THE WORLD"
The following list provides a name and short description for variables
that are used during the world build:
.Bl -tag -width Ar
.It Va BOOT_COMCONSOLE_PORT
.Pq Vt 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.
.It Va BOOT_COMCONSOLE_SPEED
.Pq Vt 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.
.It Va BOOT_PXELDR_ALWAYS_SERIAL
.Pq Vt bool
Compile in the code into
.Xr pxeboot 8
that forces the use of a serial console.
This is analogous to the
.Fl h
option in
.Xr boot 8
blocks.
.It Va BOOT_PXELDR_PROBE_KEYBOARD
.Pq Vt bool
Compile in the code into
.Xr pxeboot 8
that probes the keyboard.
If no keyboard is found, boot with the dual console configuration.
This is analogous to the
.Fl D
option in
.Xr boot 8
blocks.
.It Va ENABLE_SUID_K5SU
.Pq Vt bool
Set this if you wish to use the ksu utility.
Otherwise, it will be
installed without the set-user-ID bit set.
.It Va ENABLE_SUID_NEWGRP
.Pq Vt bool
Set this to install
.Xr newgrp 1
with the set-user-ID bit set.
Otherwise,
.Xr newgrp 1
will not be able to change users' groups.
.It Va LOADER_TFTP_SUPPORT
.Pq Vt bool
By default the
.Xr pxeboot 8
loader retrieves the kernel via NFS.
Defining this and recompiling
.Pa /usr/src/sys/boot
will cause it to retrieve the kernel via TFTP.
This allows
.Xr pxeboot 8
to load a custom BOOTP diskless kernel yet
still mount the server's
.Pa /
rather than load the server's kernel.
.It Va LOADER_FIREWIRE_SUPPORT
.Pq Vt bool
Defining this and recompiling
.Pa /usr/src/sys/boot/i386
will add
.Xr dcons 4
console driver to
.Xr loader 8
and allow access over FireWire(IEEE1394) using
.Xr dconschat 8 .
Currently, only i386 and amd64 are supported.
.It Va MALLOC_PRODUCTION
.Pq Vt bool
Set this to disable assertions and statistics gathering in
.Xr malloc 3 .
It also defaults the A and J runtime options to off.
Disabled by default on -CURRENT.
.It Va MODULES_WITH_WORLD
.Pq Vt bool
Set to build modules with the system instead of the kernel.
.It Va NO_CLEAN
.Pq Vt bool
Set this to disable cleaning during
.Dq Li "make buildworld" .
This should not be set unless you know what you are doing.
.It Va NO_CLEANDIR
.Pq Vt bool
Set this to run
.Dq Li "${MAKE} clean"
instead of
.Dq Li "${MAKE} cleandir" .
.It Va WITH_MANCOMPRESS
.Pq Vt defined
Set to install manual pages compressed.
.It Va WITHOUT_MANCOMPRESS
.Pq Vt defined
Set to install manual pages uncompressed.
.It Va NO_SHARE
.Pq Vt bool
Set to not build in the
.Pa share
subdir.
.It Va NO_SHARED
.Pq Vt bool
Set to build
.Pa /bin
and
.Pa /sbin
statically linked, this can be bad.
If set, every utility that uses
.Pa bsd.prog.mk
will be linked statically.
.It Va PPP_NO_NAT
.Pq Vt bool
Build
.Xr ppp 8
without support for network address translation (NAT).
.It Va PPP_NO_NETGRAPH
.Pq Vt bool
Set to build
.Xr ppp 8
without support for Netgraph.
.It Va PPP_NO_RADIUS
.Pq Vt bool
Set to build
.Xr ppp 8
without support for RADIUS.
.It Va PPP_NO_SUID
.Pq Vt bool
Set to disable the installation of
.Xr ppp 8
as a set-user-ID root program.
.It Va SENDMAIL_ADDITIONAL_MC
.Pq Vt str
Additional
.Pa .mc
files which should be built into
.Pa .cf
files at build time.
The value should include the full path to the
.Pa .mc
file(s), e.g.,
.Pa /etc/mail/foo.mc ,
.Pa /etc/mail/bar.mc .
.It Va SENDMAIL_ALIASES
.Pq Vt str
List of
.Xr aliases 5
files to rebuild when using
.Pa /etc/mail/Makefile .
The default value is
.Pa /etc/mail/aliases .
.It Va SENDMAIL_CFLAGS
.Pq Vt str
Flags to pass to the compile command when building
.Xr sendmail 8 .
The
.Va SENDMAIL_*
flags can be used to provide SASL support with setting such as:
.Bd -literal -offset indent
SENDMAIL_CFLAGS=-I/usr/local/include -DSASL
SENDMAIL_LDFLAGS=-L/usr/local/lib
SENDMAIL_LDADD=-lsasl
.Ed
.It Va SENDMAIL_CF_DIR
.Pq Vt str
Override the default location for the
.Xr m4 1
configuration files used to build a
.Pa .cf
file from a
.Pa .mc
file.
.It Va SENDMAIL_DPADD
.Pq Vt str
Extra dependencies to add when building
.Xr sendmail 8 .
.It Va SENDMAIL_LDADD
.Pq Vt str
Flags to add to the end of the
.Xr ld 1
command when building
.Xr sendmail 8 .
.It Va SENDMAIL_LDFLAGS
.Pq Vt str
Flags to pass to the
.Xr ld 1
command when building
.Xr sendmail 8 .
.It Va SENDMAIL_M4_FLAGS
.Pq Vt str
Flags passed to
.Xr m4 1
when building a
.Pa .cf
file from a
.Pa .mc
file.
.It Va SENDMAIL_MAP_PERMS
.Pq Vt str
Mode to use when generating alias and map database files using
.Pa /etc/mail/Makefile .
The default value is 0640.
.It Va SENDMAIL_MAP_SRC
.Pq Vt str
Additional maps to rebuild when using
.Pa /etc/mail/Makefile .
The
.Pa access ,
.Pa bitdomain ,
.Pa domaintable ,
.Pa genericstable ,
.Pa mailertable ,
.Pa uucpdomain ,
and
.Pa virtusertable
maps are always rebuilt if they exist.
.It Va SENDMAIL_MAP_TYPE
.Pq Vt str
Database map type to use when generating map database files using
.Pa /etc/mail/Makefile .
The default value is hash.
The alternative is btree.
.It Va SENDMAIL_MC
.Pq Vt str
The default
.Xr m4 1
configuration file to use at install time.
The value should include the full path to the
.Pa .mc
file, e.g.,
.Pa /etc/mail/myconfig.mc .
Use with caution as a make install will overwrite any existing
.Pa /etc/mail/sendmail.cf .
Note that
.Va SENDMAIL_CF
is now deprecated.
.It Va SENDMAIL_SET_USER_ID
.Pq Vt bool
If set, install
.Xr sendmail 8
as a set-user-ID root binary instead of a set-group-ID binary
and do not install
.Pa /etc/mail/submit.{cf,mc} .
Use of this flag is not recommended and the alternative advice in
.Pa /etc/mail/README
should be followed instead if at all possible.
.It Va SENDMAIL_START_SCRIPT
.Pq Vt str
The script used by
.Pa /etc/mail/Makefile
to start, stop, and restart
.Xr sendmail 8 .
The default value is
.Pa /etc/rc.sendmail .
This value should match the
.Dq Li mta_start_script
setting in
.Xr rc.conf 5 .
.It Va SENDMAIL_SUBMIT_MC
.Pq Vt str
The default
.Xr m4 1
configuration file for mail submission
to use at install time.
The value should include the full path to the
.Pa .mc
file, e.g.,
.Pa /etc/mail/mysubmit.mc .
Use with caution as a make install will overwrite any existing
.Pa /etc/mail/submit.cf .
.It Va TOP_TABLE_SIZE
.Pq Vt int
.Xr 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
.Pa /etc/passwd .
The default number is 20011.
.It Va WANT_FORCE_OPTIMIZATION_DOWNGRADE
.Pq Vt int
Causes the system compiler to be built such that it forces high optimization
levels to a lower one.
.Xr cc 1
.Fl O2
and above is known to trigger known optimizer bugs at various
times.
The value assigned is the highest optimization value used.
.El
.Ss "BUILDING DOCUMENTATION"
The following list provides a name and short description for variables
that are used when building documentation.
.Bl -tag -width ".Va PRINTERDEVICE"
.It Va DISTDIR
.Pq Vt str
Where distfiles are kept.
Normally, this is
.Pa distfiles
in
.Va PORTSDIR .
.It Va DOC_LANG
.Pq Vt str
The list of languages and encodings to build and install.
.It Va PRINTERDEVICE
.Pq Vt str
The default format for system documentation, depends on your
printer.
This can be set to
.Dq Li ascii
for simple printers, or
.Dq Li ps
for postscript or graphics printers with a ghostscript
filter, or both.
.El
.Ss "BUILDING PORTS"
Several make variables can be set that affect the building of ports.
These variables and their effects are documented in
.Xr ports 7 ,
.Pa ${PORTSDIR}/Mk/*
and the
.Fx
Porter's Handbook.
.Sh FILES
.Bl -tag -width ".Pa /usr/share/examples/etc/make.conf" -compact
.It Pa /etc/make.conf
.It Pa /usr/doc/Makefile
.It Pa /usr/ports/Makefile
.It Pa /usr/share/examples/etc/make.conf
.It Pa /usr/share/mk/sys.mk
.It Pa /usr/src/Makefile
.It Pa /usr/src/Makefile.inc1
.El
.Sh SEE ALSO
.Xr cc 1 ,
.Xr install 1 ,
.Xr make 1 ,
.Xr src.conf 5 ,
.Xr environ 7 ,
.Xr ports 7 ,
.Xr sendmail 8
.Sh HISTORY
The
.Nm
file appeared sometime before
.Fx 4.0 .
.Sh AUTHORS
This
manual page was written by
.An Mike W. Meyer Aq Mt mwm@mired.org .
.Sh CAVEATS
Note, that
.Ev MAKEOBJDIRPREFIX
and
.Ev MAKEOBJDIR
are environment variables and should not be set in
.Nm
or as command line arguments to
.Xr make 1 ,
but in make's environment.
.Sh BUGS
This manual page may occasionally be out of date with respect to
the options currently available for use in
.Nm .
Please check the
.Pa /usr/share/examples/etc/make.conf
file for the latest options which are available.