This is the README file for the make "include" files for the NetBSD
source tree. The files are installed in /usr/share/mk, and are,
by convention, named with the suffix ".mk".
Other sources of relevant documentation are BUILDING in the top
level of the NetBSD source tree, and the mk.conf(5) man page.
Note: this file is not intended to replace reading through the .mk
files for anything tricky.
The files are simply C-style #include files, and pretty much behave like
you'd expect. The syntax is slightly different in that a single '.' is
used instead of the hash mark, i.e. ".include <bsd.prog.mk>".
One difference that will save you lots of debugging time is that inclusion
of the file is normally done at the *end* of the Makefile. The reason for
this is because .mk files often modify variables and behavior based on the
values of variables set in the Makefile. To make this work, remember that
the FIRST target found is the target that is used, i.e. if the Makefile has:
a:
echo a
a:
echo a number two
the command "make a" will echo "a". To make things confusing, the SECOND
variable assignment is the overriding one, i.e. if the Makefile has:
a= foo
a= bar
b:
echo ${a}
the command "make b" will echo "bar". This is for compatibility with the
way the V7 make behaved.
It's fairly difficult to make the BSD .mk files work when you're building
multiple programs in a single directory. It's a lot easier to split up the
programs than to deal with the problem. Most of the agony comes from making
the "obj" directory stuff work right, not because we switched to a new version
of make. So, don't get mad at us, figure out a better way to handle multiple
architectures so we can quit using the symbolic link stuff. (Imake doesn't
count.)
The file .depend in the source directory is expected to contain dependencies
for the source files. This file is read automatically by make after reading
the Makefile.
The variable DESTDIR works as before. It's not set anywhere but will change
the tree where the file gets installed.
The profiled libraries are no longer built in a different directory than
the regular libraries. A new suffix, ".po", is used to denote a profiled
object, and ".pico" denotes a shared (position-independent) object.
There are various make variables used during the build.
Many variables support a (case sensitive) value of "no" or "yes",
and are tested with ${VAR} == "no" and ${VAR} != "no" .
The basic rule for the variable naming scheme is as follows:
HOST_<cmd> A command that runs on the host machine regardless of
whether or not the system is being cross compiled, or
options for such a command.
MK<feature> Can be set to "no" to disable feature <feature>,
or "yes" to enable feature <feature>.
Usually defaults to "yes", although some variables
default to "no".
Due to make(1) implementation issues, if a temporary
command-line override of a mk.conf(5) or <bsd.own.mk>
setting is required whilst still honoring a particular
Makefile's setting of MK<feature>, use
env MK<feature>=value make
instead of
make MK<feature>=value
NO<feature> If defined, disables feature <feature>, overriding
a user's MK<feature>=yes configuration.
Not intended for users.
This is to allow Makefiles to disable functionality
that they don't support (such as missing man pages).
NO<feature> variables must be defined before <bsd.own.mk>
is included, which generally means define before
any <*.mk> is included.
See "Variables for a Makefile".
TOOL_<tool> A tool that is provided as part of the USETOOLS
framework. When not using the USETOOLS framework,
TOOL_<tool> variables should refer to tools that are
already installed on the host system.
Various mk.conf(5) variables control the NetBSD system build.
These should not be set by Makefiles; they're for the user to define
in MAKECONF (see mk.conf(5) or <bsd.own.mk> documented below) or on
the make(1) command line.
Notable variables documented in mk.conf(5) and duplicated here:
DESTDIR Directory to contain the built NetBSD system. If set,
special options are passed to the compilation tools to
prevent their default use of the host system's
/usr/include, /usr/lib, and so forth. This pathname must
be an absolute path, and should not end with a slash (/)
character. (For installation into the system's root
directory, set DESTDIR to an empty string, not to "/").
The directory must reside on a file system which supports
long file names and hard links.
Note: build.sh will provide a default of
"destdir.MACHINE" (in the top-level .OBJDIR) unless run
in `expert' mode with the -E option.
Default: Empty string if USETOOLS=yes; otherwise unset.
RELEASEDIR If set, specifies the directory to which a release(7)
layout will be written at the end of a "make release".
If specified, must be an absolute path.
Note: build.sh will provide a default of "releasedir" (in
the top-level .OBJDIR) unless run in `expert' mode with
the -E option.
Default: Unset.
COPTS.lib<lib>
OBJCOPTS.lib<lib>
LDADD.lib<lib>
CPPFLAGS.lib<lib>
CXXFLAGS.lib<lib>
COPTS.<prog>
OBJCOPTS.<prog>
LDADD.<prog>
CPPFLAGS.<prog>
CXXFLAGS.<prog> These provide a way to specify additions to the associated
variables in a way that applies only to a particular library
or program. <lib> corresponds to the LIB variable set in
the library's makefile. <prog> corresponds to either PROG
or PROG_CXX (if set). For example, if COPTS.libcrypto is
set to "-g", "-g" will be added to COPTS only when compiling
the crypto library.
See bsd.prog.mk below for more details about these variables.
The active compiler is selected using the following variables:
AVAILABLE_COMPILER
List of available compiler suites. Processed in order
for selecting the active compiler for each frontend.
HAVE_PCC If defined, PCC is present and enabled.
HAVE_LLVM If defined, LLVM/Clang is present and enabled.
UNSUPPORTED_COMPILER.<comp>
If defined, the support for compiler <comp> is disabled.
For the frontends (CC, CPP, CXX, FC and OBJC) the following variables exist:
ACTIVE_CC Active compile suite for the CC frontend.
SUPPORTED_CC Compile suite with support for the CC frontend.
TOOL_CC.<comp> Path to the CC frontend for compiler <comp>.
=-=-=-=-= Variables for a Makefile =-=-=-=-=
If the following varialbes are defined in the Makefile before
any make(1) .include directives, they force the specific behavior.
NOCOMPAT Force MKCOMPAT=no.
NOCTF Force MKCTF=no.
NODEBUG Force MKDEBUG=no.
NODEBUGLIB Force MKDEBUGLIB=no.
NODOC Force MKDOC=no.
NOFORT Force USE_FORT=no.
NOHTML Force MKHTML=no.
NOINFO Force MKINFO=no.
NOLIBCSANITIZER Force MKLIBCSANITIZER=no (and USE_LIBCSANITIZER=no)
NOLINKLIB Force MKLINKLIB=no.
NOLINT Force MKLINT=no.
NOMAN Force MKMAN=no.
NOMANDOC Force MKMANDOC=no.
NONLS Force MKNLS=no.
NOOBJ Force MKOBJ=no.
NOPIC Force MKPIC=no.
NOPICINSTALL Force MKPICINSTALL=no.
NOPIE Force MKPIE=no.
NOPROFILE Force MKPROFILE=no.
NORELRO Force MKREPRO=no.
NOSANITIZER Force MKSANITIZER=no (and USE_SANITIZER=no)
NOSHARE Force MKSHARE=no.
NOSSP Force USE_SSP=no.
NOSTATICLIB Force MKSTATICLIB=no.
Special variations:
NOFULLRELRO!=no Force MKRELRO=no if MKRELRO=full
TODO: NOFULLRELRO should just be a defined test for consistency.
=-=-=-=-= sys.mk =-=-=-=-=
The include file <sys.mk> has the default rules for all makes, in the BSD
environment or otherwise. You probably don't want to touch this file.
=-=-=-=-= bsd.own.mk =-=-=-=-=
The include file <bsd.own.mk> contains source tree configuration parameters,
such as the owners, groups, etc. for both manual pages and binaries, and
a few global "feature configuration" parameters.
It has no targets.
To get system-specific configuration parameters, <bsd.own.mk> will try to
include the mk.conf(5) file specified by the MAKECONF variable, which may
be either set in the environment or provided on the make(1) command line.
MAKECONF defaults to /etc/mk.conf. mk.conf(5) may define any of the
variables described below.
<bsd.own.mk> sets the following variables, if they are not already defined
(defaults are in brackets):
NETBSDSRCDIR The path to the top level of the NetBSD sources.
If _SRC_TOP_ != "", that will be used as the default,
otherwise BSDSRCDIR will be used as the default.
Various makefiles within the NetBSD source tree will
use this to reference the top level of the source tree.
Default: Top level of the NetBSD source tree (as
determined by the presence of build.sh and tools/) if
make(1) is run from within that tree; otherwise BSDSRCDIR
will be used.
_SRC_TOP_ Top of the system source tree, as determined by <bsd.own.mk>
based on the presence of tools/ and build.sh. This variable
is "internal" to <bsd.own.mk>, although its value is only
determined once and then propagated to all sub-makes.
_NETBSD_VERSION_DEPENDS
A list of files which contain information about
the version of the NetBSD being built. This is
defined only if the current directory appears
to be inside a NetBSD source tree. The list of
files includes ${NETBSDSRCDIR}/sys/sys/param.h
(which contains the kernel version number),
${NETBSDSRCDIR}/sys/conf/newvers.sh and
${NETBSDSRCDIR}/sys/conf/osrelease.sh (which
interpret the information in sys/sys/param.h), and
${_SRC_TOP_OBJ_}/params (which is an optional file,
created by "make build" in ${_SRC_TOP_}/Makefile,
containing all the variables that may influence the
build).
Targets that depend on the NetBSD version, or on
variables defined at build time, can declare a
dependency on ${_NETBSD_VERSION_DEPENDS}, like this:
version.c: ${_NETBSD_VERSION_DEPENDS}
commands to create version.c
BSDSRCDIR The real path to the NetBSD source tree, if NETBSDSRCDIR
isn't defined.
Default: "/usr/src".
BSDOBJDIR The real path to the object directory tree for the NetBSD
source tree.
Default: "/usr/obj".
BINGRP Binary group. [wheel]
BINOWN Binary owner. [root]
BINMODE Binary mode. [555]
NONBINMODE Mode for non-executable files. [444]
MANDIR Base path for manual installation. [/usr/share/man/cat]
MANGRP Manual group. [wheel]
MANOWN Manual owner. [root]
MANMODE Manual mode. [${NONBINMODE}]
MANINSTALL Manual installation type. Space separated list:
catinstall, htmlinstall, maninstall
Default value derived from MKCATPAGES and MKHTML.
MAKELINKLIB Defaults to ${MKLINKLIB} but can be overridden by Makefiles
MAKESTATICLIB Defaults to ${MKSTATICLIB} but can be overridden by Makefiles
LDSTATIC Control program linking; if set blank, link everything
dynamically. If set to "-static", link everything statically.
If not set, programs link according to their makefile.
LIBDIR Base path for library installation. [/usr/lib]
LINTLIBDIR Base path for lint(1) library installation. [/usr/libdata/lint]
LIBGRP Library group. [${BINGRP}]
LIBOWN Library owner. [${BINOWN}]
LIBMODE Library mode. [${NONBINMODE}]
LINKINSTALL Install libraries used by users to link against (.a/.so)
defaults to ${MAKELINKLIB}
DOCDIR Base path for system documentation (e.g. PSD, USD, etc.)
installation. [/usr/share/doc]
DOCGRP Documentation group. [wheel]
DOCOWN Documentation owner. [root]
DOCMODE Documentation mode. [${NONBINMODE}]
GZIP_N_FLAG Options to pass to TOOL_GZIP to prevent it from inserting
file names or timestamps in the compressed output.
[-n, or -nT when TOOL_GZIP is really TOOL_PIGZ]
NLSDIR Base path for Native Language Support files installation.
[/usr/share/nls]
NLSGRP Native Language Support files group. [wheel]
NLSOWN Native Language Support files owner. [root]
NLSMODE Native Language Support files mode. [${NONBINMODE}]
X11SRCDIR Directory containing the modular Xorg source. If
specified, must be an absolute path. The main modular
Xorg source is found in ${X11SRCDIR}/external/mit.
Default: ${NETBSDSRCDIR}/../xsrc, if that exists; otherwise
"/usr/xsrc".
X11SRCDIR.local The path to the local X11 src tree. [${X11SRCDIR}/local]
X11SRCDIR.lib<package>
X11SRCDIR.<package>
The path to the xorg src tree for the specified package>.
[${X11SRCDIR}/external/mit/xorg/<package>/dist]
X11ROOTDIR Root directory of the X11 installation. [/usr/X11R7]
X11BINDIR X11 bin directory. [${X11ROOTDIR}/bin]
X11FONTDIR X11 font directory. [${X11ROOTDIR}/lib/X11/fonts]
X11INCDIR X11 include directory. [${X11ROOTDIR}/include]
STRIPFLAG The option passed to the install program to cause the binary
to be stripped. This is to be used when building your
own install script so that the entire system can be made
stripped/not-stripped using a single knob. []
COPY The option passed to the install program to cause the binary
to be copied rather than moved. This is to be used when
building our own install script so that the entire system
can either be installed with copies, or with moves using
a single knob. [-c]
MAKEDIRTARGETENV
Environment variables passed to the child make process
invoked by MAKEDIRTARGET.
MAKEDIRTARGET dir target [params]
Runs "cd $${dir} && ${MAKE} [params] $${target}",
displaying a "pretty" message whilst doing so.
RELEASEMACHINEDIR
Subdirectory used below RELEASEDIR when building
a release. [${MACHINE},
or ${MACHINE}-${MACHINE_ARCH} for evb{arm,mips,sh3}*]
RELEASEMACHINE Subdirectory or path component used for the following
paths:
distrib/${RELEASEMACHINE}
distrib/notes/${RELEASEMACHINE}
etc/etc.${RELEASEMACHINE}
Used when building a release. [${MACHINE}]
Additionally, the following variables may be set by <bsd.own.mk> or in a
make configuration file to modify the behavior of the system build
process (default values are in brackets along with comments, if set by
<bsd.own.mk>):
USETOOLS Can be set to "yes" or "no". Indicates whether the tools
specified by ${TOOLDIR} should be used as part of a build in
progress. Must be set to "yes" if cross-compiling.
Supported values:
yes Use the tools from TOOLDIR.
no Do not use the tools from TOOLDIR, but refuse to
build native compilation tool components that are
version-specific for that tool.
never Do not use the tools from TOOLDIR, even when
building native tool components. This is similar to
the traditional NetBSD build method, but does not
verify that the compilation tools in use are
up-to-date enough in order to build the tree
successfully. This may cause build or runtime
problems when building the whole NetBSD source tree.
Default: "no" when using <bsd.*.mk> outside the NetBSD
source tree (detected automatically) or if
TOOLCHAIN_MISSING=yes; otherwise "yes".
OBJECT_FMT Object file format. [set to "ELF" on architectures that
use ELF -- currently all architectures].
TOOLCHAIN_MISSING
Can be set to "yes" or "no". If not "no", this
indicates that the platform "MACHINE_ARCH" being built
does not have a working in-tree toolchain.
If the ${MACHINE_ARCH} in question falls into this category,
TOOLCHAIN_MISSING is conditionally assigned the value "yes".
Otherwise, the variable is unconditionally assigned the
value "no".
If not "no", acts as MKBINUTILS=no MKGCC=no MKGDB=no.
Default: "no".
EXTERNAL_TOOLCHAIN
This variable is not directly set by <bsd.own.mk>, but
including <bsd.own.mk> is the canonical way to gain
access to this variable. The variable should be defined
either in the user's environment or in the user's mk.conf(5)
file.
If defined, this variable indicates the root directory of
an external toolchain which will be used to build the
tree. For example, if a platform is a ${TOOLCHAIN_MISSING}
platform, EXTERNAL_TOOLCHAIN can be used to re-enable the
cross-compile framework.
If EXTERNAL_TOOLCHAIN is defined, act as MKGCC=no, since
the external version of the compiler may not be able to build
the library components of the in-tree compiler.
This variable should be used in conjunction with an
appropriate HAVE_GCC or HAVE_LLVM setting to control the
compiler options.
Note: This variable is not yet used in as many places as
it should be. Expect the exact semantics of this variable
to change in the short term as parts of the cross-compile
framework continue to be cleaned up.
The following variables are defined to commands to perform the
appropriate operation, with the default in [brackets]. Note that
the defaults change if USETOOLS == "yes":
TOOL_AMIGAAOUT2BB aout to Amiga bootblock converter. [amiga-aout2bb]
TOOL_AMIGAELF2BB ELF to Amiga bootblock converter. [amiga-elf2bb]
TOOL_AMIGATXLT Amiga assembly language format translator. [amiga-txlt]
TOOL_ARMELF2AOUT ELF to a.out executable converter [arm-elf2aout}
TOOL_GROFF Front end for groff document formatting system. [groff]
TOOL_GZIP Compression/decompression tool. [gzip]
TOOL_GZIP_N Same as TOOL_GZIP, plus a command line option to
prevent it from inserting file names or timestamps
into the compressed output.
[${TOOL_GZIP} ${GZIP_N_FLAG}]
TOOL_SOELIM Eliminate .so's from groff input. [soelim]
TOOL_SPARKCRC Generate a crc suitable for use in a sparkive file.
[sparkcrc]
TOOL_STAT Display file status. [stat]
TOOL_STRFILE Create a random access file for storing strings.
[strfile]
TOOL_SUNLABEL Read or modify a SunOS disk label. [sunlabel]
TOOL_TBL Format tables for groff. [tbl]
TOOL_UUDECODE Uudecode a binary file. [uudecode]
TOOL_VAXMOPCOPY Creates a MOP image from another executable format.
[vax-mopcopy]
TOOL_VGRIND Grind nice listings of programs. [vgrind -f]
TOOL_ZIC Time zone compiler. [zic]
For each possible value of MACHINE_CPU, MACHINES.${MACHINE_CPU} contain a
list of what ports can be built for it. This keeps those definitions in
centralized place.
<bsd.own.mk> is generally useful when building your own Makefiles so that
they use the same default owners etc. as the rest of the tree.
=-=-=-=-= bsd.clean.mk =-=-=-=-=
The include file <bsd.clean.mk> defines the clean and cleandir
targets. It uses the following variables:
CLEANFILES Files to remove for both the clean and cleandir targets.
CLEANDIRFILES Files to remove for the cleandir target, but not for
the clean target.
MKCLEANSRC Controls whether or not the clean and cleandir targets
will delete files from both the object directory,
${.OBJDIR}, and the source directory, ${.CURDIR}.
If MKCLEANSRC is set to "no", then the file names in
CLEANFILES or CLEANDIRFILES are interpreted relative
to the object directory, ${.OBJDIR}. This is the
traditional behaviour.
If MKCLEANSRC is set to "yes", then the file deletion
is performed relative to both the object directory,
${.OBJDIR}, and the source directory, ${.CURDIR}. (This
has no effect if ${.OBJDIR} is the same as ${.CURDIR}.)
Deleting files from ${.CURDIR} is intended to remove
stray output files that had been left in the source
directory by an earlier build that did not use object
directories.
The default is MKCLEANSRC=yes. If you always build with
separate object directories, and you are sure that there
are no stray files in the source directories, then you
may set MKCLEANSRC=no to save some time.
MKCLEANVERIFY Controls whether or not the clean and cleandir targets
will verify that files have been deleted.
If MKCLEANVERIFY is set to "no", then the files will
be deleted using a "rm -f" command, and its success or
failure will be ignored.
If MKCLEANVERIFY is set to "yes", then the success of
the "rm -f" command will be verified using an "ls"
command.
The default is MKCLEANVERIFY=yes. If you are sure that
there will be no problems caused by file permissions,
read-only file systems, or the like, then you may set
MKCLEANVERIFY=no to save some time.
To use the clean and cleandir targets defined in <bsd.clean.mk>, other
Makefiles or bsd.*.mk files should append file names to the CLEANFILES
or CLEANDIRFILES variables. For example:
CLEANFILES+= a.out
CLEANDIRFILES+= .depend
.include <bsd.clean.mk>
The files listed in CLEANFILES and CLEANDIRFILES must not be
directories, because the potential risk from running "rm -rf" commands
in bsd.clean.mk is considered too great. If you want to recursively
delete a directory as part of "make clean" or "make cleandir" then you
need to provide your own target.
=-=-=-=-= bsd.dep.mk =-=-=-=-=
The include file <bsd.dep.mk> contains the default targets for building
depend files. It creates .d files from entries in SRCS and DPSRCS
that are C, C++, or Objective C source files, and builds .depend from the
d files. All other files in SRCS and all of DPSRCS will be used as
dependencies for the .d files. In order for this to function correctly,
it should be .included after all other .mk files and directives that may
modify SRCS or DPSRCS. It uses the following variables:
SRCS List of source files to build the program.
DPSRCS List of source files which are needed for generating
dependencies, but are not needed in ${SRCS}.
NODPSRCS TODO
=-=-=-=-= bsd.files.mk =-=-=-=-=
The include file <bsd.files.mk> handles the FILES variables and is included
from <bsd.lib.mk> and <bsd.prog.mk>, and uses the following variables:
FILES The list of files to install.
CONFIGFILES Similar semantics to FILES, except that the files
are installed by the `configinstall' target,
not the `install' target.
The FILES* variables documented below also apply.
FILESOWN File owner. [${BINOWN}]
FILESGRP File group. [${BINGRP}]
FILESMODE File mode. [${NONBINMODE}]
FILESDIR The location to install the files.
FILESNAME Optional name to install each file as.
FILESOWN_<fn> File owner of the specific file <fn>.
FILESGRP_<fn> File group of the specific file <fn>.
FILESMODE_<fn> File mode of the specific file <fn>.
FILESDIR_<fn> The location to install the specific file <fn>.
FILESNAME_<fn> Optional name to install <fn> as.
FILESBUILD If this variable is defined, then its value will be
used as the default for all FILESBUILD_<fn> variables.
Otherwise, the default will be "no".
FILESBUILD_<fn> A value different from "no" will add the file to the list of
targets to be built by `realall'. Users of that variable
should provide a target to build the file.
BUILDSYMLINKS List of two word items:
lnsrc lntgt
For each lnsrc item, create a symlink named lntgt.
The lntgt symlinks are removed by the cleandir target.
UUDECODE_FILES List of files which are stored as <file>.uue in the source
tree. Each one will be decoded with ${TOOL_UUDECODE}.
The source files have a `.uue' suffix, the generated files do
not.
UUDECODE_FILES_RENAME_<fn>
Rename the output from the decode to the provided name.
Note: These files are simply decoded, with no install or other
rule applying implicitly except being added to the clean
target.
=-=-=-=-= bsd.gcc.mk =-=-=-=-=
The include file <bsd.gcc.mk> computes various parameters related to GCC
support libraries. It defines no targets. <bsd.own.mk> MUST be included
before <bsd.gcc.mk>.
The primary users of <bsd.gcc.mk> are <bsd.prog.mk> and <bsd.lib.mk>, each
of which need to know where to find certain GCC support libraries.
The behavior of <bsd.gcc.mk> is influenced by the EXTERNAL_TOOLCHAIN variable,
which is generally set by the user. If EXTERNAL_TOOLCHAIN it set, then
the compiler is asked where to find the support libraries, otherwise the
support libraries are found in ${DESTDIR}/usr/lib.
<bsd.gcc.mk> sets the following variables:
_GCC_CRTBEGIN The full path name to crtbegin.o.
_GCC_CRTBEGINS The full path name to crtbeginS.o.
_GCC_CRTEND The full path name to crtend.o.
_GCC_CRTENDS The full path name to crtendS.o.
_GCC_LIBGCCDIR The directory where libgcc.a is located.
=-=-=-=-= bsd.inc.mk =-=-=-=-=
The include file <bsd.inc.mk> defines the includes target and uses the
variables:
INCS The list of include files.
INCSDIR The location to install the include files.
INCSNAME Target name of the include file, if only one; same as
FILESNAME, but for include files.
INCSYMLINKS Similar to SYMLINKS in <bsd.links.mk>, except that these
are installed in the 'includes' target and not the
(much later) 'install' target.
INCSNAME_<file> The name file <file> should be installed as, if not <file>,
same as FILESNAME_<file>, but for include files.
=-=-=-=-= bsd.info.mk =-=-=-=-=
The include file <bsd.info.mk> is used to generate and install GNU Info
documentation from respective Texinfo source files. It defines three
implicit targets (.txi.info, .texi.info, and .texinfo.info), and uses the
following variables:
TEXINFO List of Texinfo source files. Info documentation will
consist of single files with the extension replaced by
.info.
INFOFLAGS Options to pass to makeinfo. []
=-=-=-=-= bsd.kernobj.mk =-=-=-=-=
The include file <bsd.kernobj.mk> defines variables related to the
location of kernel sources and object directories.
KERNSRCDIR Directory at the top of the kernel source..
[${NETBSDSRCDIR}/sys]
KERNARCHDIR Directory under KERNSRCDIR containing the machine
dependent kernel sources.
[arch/${MACHINE}]
KERNCONFDIR Directory containing the kernel configuration files.
[${KERNSRCDIR}/${KERNARCHDIR}/conf]
KERNOBJDIR Directory for kernel builds. For example, the kernel
GENERIC will be compiled in KERNOBJDIR/GENERIC.
Default:
${MAKEOBJDIRPREFIX}${KERNSRCDIR}/${KERNARCHDIR}/compile
if it exists or the make(1) target 'obj' is being made;
otherwise ${KERNSRCDIR}/${KERNARCHDIR}/compile.
It is important that Makefiles (such as those under src/distrib) that
wish to find compiled kernels use <bsd.kernobj.mk> and ${KERNOBJDIR}
rather than make assumptions about the location of the compiled kernel.
=-=-=-=-= bsd.kinc.mk =-=-=-=-=
The include file <bsd.kinc.mk> defines the many targets (includes,
subdirectories, etc.), and is used by kernel makefiles to handle
include file installation. It is intended to be included alone, by
kernel Makefiles. It uses similar variables to <bsd.inc.mk>.
Please see <bsd.kinc.mk> for more details, and keep the documentation
in that file up to date.
=-=-=-=-= bsd.syscall.mk =-=-=-=-=
The include file <bsd.syscall.mk> contains the logic to create syscall
files for various emulations. It includes <bsd.kinc.mk> to handle the
rest of the targets.
=-=-=-=-= bsd.lib.mk =-=-=-=-=
The include file <bsd.lib.mk> has support for building libraries. It has
the same eight targets as <bsd.prog.mk>: all, clean, cleandir, depend,
includes, install, lint, and tags. Additionally, it has a checkver target
which checks for installed shared object libraries whose version is greater
that the version of the source. It has a limited number of suffixes,
consistent with the current needs of the BSD tree. <bsd.lib.mk> includes
<bsd.shlib.mk> to get shared library parameters.
It sets/uses the following variables:
LIB The name of the library to build.
LIBDIR Target directory for libraries.
SHLIBINSTALLDIR Target directory for shared libraries if ${USE_SHLIBDIR}
is not "no".
SHLIB_MAJOR
SHLIB_MINOR
SHLIB_TEENY Major, minor, and teeny version numbers of shared library
USE_SHLIBDIR If not "no", use ${SHLIBINSTALLDIR} instead of ${LIBDIR}
as the path to install shared libraries to.
USE_SHLIBDIR must be defined before <bsd.own.mk> is included.
Default: no
LIBISMODULE If not "no", install as ${LIB}.so (without the "lib" prefix),
and act as "MKDEBUGLIB=no MKPICINSTALL=no MKPROFILE=no
MKSTATICLIB=no". Also do not install the lint library.
Default: no
LIBISPRIVATE If not "no", act as "MKDEBUGLIB=no MKPIC=no MKPROFILE=no",
and don't install the (.a) library or the lint library.
This is useful for "build only" helper libraries.
If set to "pic", then a _pic.a library is also produced,
so that it can be incorporated into other shared objects.
Default: no
LIBISCXX If not "no", Use ${CXX} instead of ${CC} to link
shared libraries.
This is useful for C++ libraries.
Default: no
LINTLIBDIR Target directory for lint libraries.
LIBGRP Library group.
LIBOWN Library owner.
LIBMODE Library mode.
LDADD Additional loader objects.
MAN The manual pages to be installed (use a .1 - .9 suffix).
NOCHECKVER_<library>
NOCHECKVER If set, disables checking for installed shared object
libraries with versions greater than the source. A
particular library name, without the "lib" prefix, may
be appended to the variable name to disable the check for
only that library.
SRCS List of source files to build the library. Suffix types
.s, .c, and .f are supported. Note, .s files are preferred
to .c files of the same name. (This is not the default for
versions of make.)
LIBDPLIBS/
PROGDPLIBS A list of the tuples:
libname path-to-srcdir-of-libname
Instead of depending on installed versions of the libraries,
one can depend on their built version in the source directory.
This is useful for finding private libraries (LIBISPRIVATE).
For each tuple;
* LIBDO.libname contains the .OBJDIR of the library
`libname', and if it is not set it is determined
from the srcdir and added to MAKEOVERRIDES (the
latter is to allow for build time optimization).
* LDADD gets -L${LIBDO.libname} -llibname added.
* DPADD gets ${LIBDO.libname}/liblibname.so or
${LIBDO.libname}/liblibname.a added.
The special value "_external" for LIBDO.lib makes the
build system to assume the library comes from outside
of the NetBSD source tree and only causes -llibname
to be added to LDADD.
This variable may be used for individual libraries/programs,
as well as in parent directories to cache common libraries
as a build-time optimization.
LIB_EXPSYM File listing all symbols expected to be defined by the
library. Each line has a single symbol. If the symbol
is versioned, it is followed by `@@', if it is the
default version, or `@', if not, and the symbol
version. The lines must be sorted in LANG=C.
bsd.lib.mk checks to make sure exactly the set of
symbols in this file is defined when the library is
built; if not, the build will fail and print a diff
from the expected symbols to the actual symbols.
During development, you can update the expected symbols
from the actual ones with `make update-symbols'.
VERSION_MAP Path to an ld version script to use when linking the
library. Resolved from .PATH like a target
prerequisite.
The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
if it exists, as well as the include file <bsd.man.mk>.
It has rules for building profiled objects; profiled libraries are
built by default.
Libraries are ranlib'd when made.
=-=-=-=-= bsd.links.mk =-=-=-=-=
The include file <bsd.links.mk> handles the LINKS and SYMLINKS variables
and is included from <bsd.lib.mk> and <bsd.prog.mk>.
LINKSOWN, LINKSGRP, and LINKSMODE, are relevant only if a metadata log
is used. The defaults may be modified by other bsd.*.mk files which
include bsd.links.mk. In the future, these variables may be replaced
by a method for explicitly recording hard links in a metadata log.
LINKS The list of hard links, consisting of pairs of paths:
source-file target-file
${DESTDIR} is prepended to both paths before linking.
For example, to link /bin/test and /bin/[, use:
LINKS=/bin/test /bin/[
CONFIGLINKS Similar semantics to LINKS, except that the links
are installed by the `configinstall' target,
not the `install' target.
SYMLINKS The list of symbolic links, consisting of pairs of paths:
source-file target-file
${DESTDIR} is only prepended to target-file before linking.
For example, to symlink /usr/bin/tar to /bin/tar resulting
in ${DESTDIR}/usr/bin/tar -> /bin/tar:
SYMLINKS=/bin/tar /usr/bin/tar
CONFIGSYMLINKS Similar semantics to SYMLINKS, except that the symbolic links
are installed by the `configinstall' target,
not the `install' target.
LINKSOWN Link owner. [${BINOWN}]
LINKSGRP Link group. [${BINGRP}]
LINKSMODE Link mode. [${NONBINMODE}]
LINKSOWN_<fn> Link owner of the specific file <fn>.
LINKSGRP_<fn> Link group of the specific file <fn>.
LINKSMODE_<fn> Link mode of the specific file <fn>.
=-=-=-=-= bsd.man.mk =-=-=-=-=
The include file <bsd.man.mk> handles installing manual pages and their
links.
It has a three targets:
catinstall:
Install the preformatted manual pages and their links.
htmlinstall:
Install the HTML manual pages and their links.
maninstall:
Install the manual page sources and their links.
It sets/uses the following variables:
MANDIR Base path for manual installation.
MANGRP Manual group.
MANOWN Manual owner.
MANMODE Manual mode.
MANSUBDIR Subdirectory under the manual page section, i.e. "/vax"
or "/tahoe" for machine specific manual pages.
MAN The manual pages to be installed (use a .1 - .9 suffix).
MLINKS List of manual page links (using a .1 - .9 suffix). The
linked-to file must come first, the linked file second,
and there may be multiple pairs.
The include file <bsd.man.mk> includes a file named "../Makefile.inc" if
it exists.
=-=-=-=-= bsd.obj.mk =-=-=-=-=
The include file <bsd.obj.mk> defines targets related to the creation
and use of separated object and source directories.
If an environment variable named MAKEOBJDIRPREFIX is set, make(1) uses
${MAKEOBJDIRPREFIX}${.CURDIR} as the name of the object directory if
it exists. Otherwise make(1) looks for the existence of a
subdirectory (or a symlink to a directory) of the source directory
into which built targets should be placed. If an environment variable
named MAKEOBJDIR is set, make(1) uses its value as the name of the
object directory; failing that, make first looks for a subdirectory
named "obj.${MACHINE}", and if that doesn't exist, it looks for "obj".
Object directories are not created automatically by make(1) if they
don't exist; you need to run a separate "make obj". (This will happen
during a top-level build if "MKOBJDIRS" is set to a value other than
"no"). When the source directory is a subdirectory of ${BSDSRCDIR} --
and this is determined by a simple string prefix comparison -- object
directories are created in a separate object directory tree, and a
symlink to the object directory in that tree is created in the source
directory; otherwise, "make obj" assumes that you're not in the main
source tree and that it's not safe to use a separate object tree.
Several variables used by <bsd.obj.mk> control exactly what
directories and links get created during a "make obj":
MAKEOBJDIR If set, this is the component name of the object
directory.
OBJMACHINE If this is set but MAKEOBJDIR is not set, creates
object directories or links named "obj.${MACHINE}";
otherwise, just creates ones named "obj".
OBJMACHINE_ARCH If set with OBJMACHINE, creates object directories or
links named "obj.${MACHINE}-${MACHINE_ARCH}".
USR_OBJMACHINE If set, and the current directory is a subdirectory of
${BSDSRCDIR}, create object directory in the
corresponding subdirectory of ${BSDOBJDIR}.${MACHINE};
otherwise, create it in the corresponding subdirectory
of ${BSDOBJDIR}
BUILDID Identifier for the build. If set, this should be a short
string that is suitable for use as part of a file or
directory name. The identifier will be appended to
object directory names; if OBJMACHINE is also set, then
.BUILDID is appended after .MACHINE. The identifier will
also be used as part of the kernel version string, which
can be shown by “uname -v”.
Default: Unset.
=-=-=-=-= bsd.prog.mk =-=-=-=-=
The include file <bsd.prog.mk> handles building programs from one or
more source files, along with their manual pages. It has a limited number
of suffixes, consistent with the current needs of the BSD tree.
<bsd.prog.mk> includes <bsd.shlib.mk> to get shared library parameters.
It has eight targets:
all:
build the program and its manual page. This also
creates a GDB initialization file (.gdbinit) in
the objdir. The .gdbinit file sets the shared library
prefix to ${DESTDIR} to facilitate cross-debugging.
clean:
remove the program, any object files and the files a.out,
Errs, errs, mklog, and ${PROG}.core.
cleandir:
remove all of the files removed by the target clean, as
well as .depend, tags, and any manual pages.
`distclean' is a synonym for `cleandir'.
depend:
make the dependencies for the source files, and store
them in the file .depend.
includes:
install any header files.
install:
install the program and its manual pages; if the Makefile
does not itself define the target install, the targets
beforeinstall and afterinstall may also be used to cause
actions immediately before and after the install target
is executed.
lint:
run lint on the source files
tags:
create a tags file for the source files.
It sets/uses the following variables:
BINGRP Binary group.
BINOWN Binary owner.
BINMODE Binary mode.
CLEANDIRFILES Additional files to remove for the cleandir target.
CLEANFILES Additional files to remove for the clean and cleandir targets.
CONFIGOPTS Additional options to config(1) when building kernels.
Default: Unset.
COPTS Extra options for the C compiler. Should be appended to
(e.g., COPTS+=-g), rather than explicitly set.
Note: CPUFLAGS, not COPTS, should be used for compiler
options that select CPU-related options.
COPTS.<fn> Extra options for the C compiler when creating the
C objects for <fn>.
For <fn>.[ly], "<fn>.c" must be used.
CPUFLAGS Additional options passed to the compiler/assembler to
select CPU instruction set options, CPU tuning options,
etc.
Note: Such options should not be specified in COPTS,
because some parts of the build process need to override
CPU-related compiler options.
Default: Unset.
CPUFLAGS.<fn> Additional options to the compiler/assembler for <fn>.
For <fn>.[ly], "<fn>.c" must be used.
CPPFLAGS Additional options to the C pre-processor.
CPPFLAGS.<fn> Additional options to the C pre-processor for <fn>.
For <fn>.[ly], "<fn>.c" must be used.
GDBINIT List of GDB initialization files to add to "source"
directives in the .gdbinit file that is created in the
objdir.
LDADD Additional loader objects. Usually used for libraries.
For example, to load with the compatibility and utility
libraries, use:
LDADD+=-lutil -lcompat
LDFLAGS Additional linker options (passed to ${CC} during link).
LINKS See <bsd.links.mk>
OBJCOPTS Additional options to the compiler when creating ObjC objects.
OBJCOPTS.<fn> Additional options to the compiler when creating the
ObjC objects for <fn>.
For <fn>.[ly], "<fn>.c" must be used.
SYMLINKS See <bsd.links.mk>
MAN Manual pages (should end in .1 - .9). If no MAN variable is
defined, "MAN=${PROG}.1" is assumed.
PAXCTL_FLAGS If defined, run paxctl(1) on the program binary after link
time, with the value of this variable as options to paxctl(1).
PAXCTL_FLAGS.${PROG} Custom override for PAXCTL_FLAGS.
PROG The name of the program to build. If not supplied, nothing
is built.
PROG_CXX If defined, the name of the program to build. Also
causes <bsd.prog.mk> to link the program with the C++
compiler rather than the C compiler. PROG_CXX overrides
the value of PROG if PROG is also set.
PROGNAME The name that the above program will be installed as, if
different from ${PROG}.
PROGS Multiple programs to build from a single directory.
Defaults to PROG. For each program ${_P} in ${PROGS},
uses SRCS.${_P}, defaulting to ${_P}.c.
PROGS_CXX Multiple C++ programs to build from a single directory.
Defaults to PROG_CXX. For each program ${_P} in ${PROGS_CXX},
uses SRCS.${_P}, defaulting to ${_P}.cc.
SRCS List of source files to build the program. If SRCS is not
defined, it's assumed to be ${PROG}.c or ${PROG_CXX}.cc.
DPSRCS List of source files which are needed for generating
dependencies, but are not needed in ${SRCS}.
DPADD Additional dependencies for the program. Usually used for
libraries. For example, to depend on the compatibility and
utility libraries use:
DPADD+=${LIBCOMPAT} ${LIBUTIL}
The following system libraries are predefined for DPADD:
STRIPFLAG The option passed to the install program to cause the binary
to be stripped.
SUBDIR A list of subdirectories that should be built as well.
Each of the targets will execute the same target in the
subdirectories.
SCRIPTS A list of interpreter scripts [file.{sh,csh,pl,awk,...}].
These are installed exactly like programs.
SCRIPTSDIR The location to install the scripts. Each script can be
installed to a separate path by setting SCRIPTSDIR_<script>.
SCRIPTSNAME The name that the above program will be installed as, if
different from ${SCRIPTS}. These can be further specialized
by setting SCRIPTSNAME_<script>.
FILES See description of <bsd.files.mk>.
SHLINKDIR Target directory for shared linker. See description of
<bsd.own.mk> for additional information about this variable.
The include file <bsd.prog.mk> includes the file named "../Makefile.inc"
if it exists, as well as the include file <bsd.man.mk>.
Some simple examples:
To build foo from foo.c with a manual page foo.1, use:
PROG= foo
.include <bsd.prog.mk>
To build foo from foo.c with a manual page foo.2, add the line:
MAN= foo.2
If foo does not have a manual page at all, add the line
before any make(1) .include directives:
NOMAN=
If foo has multiple source files, add the line:
SRCS= a.c b.c c.c d.c
=-=-=-=-= bsd.rpc.mk =-=-=-=-=
The include file <bsd.rpc.mk> contains a makefile fragment used to
construct source files built by rpcgen.
The following macros may be defined in makefiles which include
<bsd.rpc.mk> in order to control which files get built and how they
are to be built:
RPC_INCS construct .h file from .x file
RPC_XDRFILES construct _xdr.c from .x file
(for marshalling/unmarshalling data types)
RPC_SVCFILES construct _svc.c from .x file
(server-side stubs)
RPC_SVCFLAGS Additional options passed to builds of RPC_SVCFILES.
RPC_XDIR Directory containing .x/.h files
=-=-=-=-= bsd.shlib.mk =-=-=-=-=
The include file <bsd.shlib.mk> computes parameters for shared library
installation and use. It defines no targets. <bsd.own.mk> MUST be
included before <bsd.shlib.mk>.
<bsd.own.mk> sets the following variables, if they are not already defined
(defaults are in brackets):
SHLIBINSTALLDIR If ${USE_SHLIBDIR} is not "no", use ${SHLIBINSTALLDIR}
instead of ${LIBDIR} as the base path for shared library
installation. [/lib]
SHLIBDIR The path to USE_SHLIBDIR shared libraries to use when building
a program. [/lib for programs in /bin and /sbin, /usr/lib
for all others.]
_LIBSODIR Set to ${SHLIBINSTALLDIR} if ${USE_SHLIBDIR} is not "no",
otherwise set to ${LIBDIR}
SHLINKINSTALLDIR Base path for shared linker. [/libexec]
SHLINKDIR Path to use for shared linker when building a program.
[/libexec for programs in /bin and /sbin, /usr/libexec for
all others.]
=-=-=-=-= bsd.subdir.mk =-=-=-=-=
The include file <bsd.subdir.mk> contains the default targets for building
subdirectories. It has the same eight targets as <bsd.prog.mk>: all,
clean, cleandir, depend, includes, install, lint, and tags. It uses the
following variables:
NOSUBDIR If this variable is defined, then the SUBDIR variable
will be ignored and subdirectories will not be processed.
SUBDIR For all of the directories listed in ${SUBDIR}, the
specified directory will be visited and the target made.
As a special case, the use of a token .WAIT as an
entry in SUBDIR acts as a synchronization barrier
when multiple make jobs are run; subdirs before the
.WAIT must complete before any subdirs after .WAIT are
started. See make(1) for some caveats on use of .WAIT
and other special sources.
=-=-=-=-= bsd.x11.mk =-=-=-=-=
The include file <bsd.x11.mk> contains parameters and targets for
cross-building X11 from ${X11SRCDIR.<package>}. It should be included
after the general Makefile contents but before the include files such as
<bsd.prog.mk> and <bsd.lib.mk>.
It provides the following targets:
.man.1 .man.3 .man.4 .man.5 .man.7:
If ${MAN} or ${PROG} is set and ${MKMAN} != "no",
these rules convert from X11's manual page source
into an mdoc.old source file.
It sets the following variables:
BINDIR Set to ${X11BINDIR}.
To override, define after including <bsd.x11.mk>
LIBDIR Set to ${X11USRLIBDIR}.
To override, define after including <bsd.x11.mk>
MANDIR Set to ${X11MANDIR}.
To override, define after including <bsd.x11.mk>
CPPFLAGS Appended with definitions to include from
${DESTDIR}${X11INCDIR}
LDFLAGS Appended with definitions to link from
${DESTDIR}${X11USRLIBDIR}
X11FLAGS.CONNECTION Equivalent to X11's CONNECTION_FLAGS.
X11FLAGS.EXTENSION Equivalent to X11's EXT_DEFINES.
X11FLAGS.LOADABLE Equivalent to X11's LOADABLE.
X11FLAGS.OS_DEFINES Equivalent to X11's OS_DEFINES.
X11FLAGS.SERVER Equivalent to X11's ServerDefines.
X11FLAGS.THREADLIB Equivalent to X11's THREADS_DEFINES for libraries.
X11FLAGS.THREADS Equivalent to X11's THREADS_DEFINES.
X11FLAGS.VERSION cpp(1) definitions of OSMAJORVERSION and OSMINORVERSION.
X11FLAGS.DIX Equivalent to X11's DIX_DEFINES.
X11TOOL_UNXCOMM Commandline to convert `XCOMM' comments to `#'
It uses the following variables:
APPDEFS List of app-default files to install.
CPPSCRIPTS List of files/scripts to run through cpp(1)
and then ${X11TOOL_UNXCOMM}. The source files
have a `.cpp' suffix, the generated files do not.
CPPSCRIPTFLAGS Additional options to cpp(1) when building CPPSCRIPTS.
CPPSCRIPTFLAGS_<fn> Additional options to cpp(1) when building CPPSCRIPT <fn>.
The following files are described here for completion, but they are not
supposed to be included directly from other Makefiles; they are used
internally by other system files.
=-=-=-=-= bsd.sys.mk =-=-=-=-=
The include file <bsd.sys.mk> is used by other system mk files and
it is not intended to be included standalone. It contains rules and
system build variables. It requires bsd.own.mk to be included first.
It contains overrides that are used when building the NetBSD source tree.
The following variables control how various files are compiled/built.
(Note that these may be overridden in <bsd.own.mk> if USETOOLS == "yes"):
AR Create, modify, and extract from archives. [ar]
ARFLAGS Options to ${AR}. [rl]
ARM_ELF2AOUT Convert ELF-format executable to a.out. [elf2aout]
AS Assembler. [as]
AFLAGS Options to ${CC} when compiling or linking .s or .S
assembly source files. []
BUILDSEED g++(1) uses random numbers when compiling C++ code. This
variable seeds the g++(1) random number generator using
-frandom-seed with this value. By default, it is set to
"NetBSD-(majorversion)". Using a fixed value causes C++
binaries to be the same when built from the same sources,
resulting in identical (reproducible) builds. Additional
information is available in the g++(1) documentation of
-frandom-seed.
Default: Unset.
CC C compiler. [cc]
CFLAGS Options to ${CC}. [Usually -O or -O2]
Note: CFLAGS should never be set in mk.conf(5).
CPP C Pre-Processor. [cpp]
CPPFLAGS Options to ${CPP}. []
CPUFLAGS Optimization options for ${CC}. []
CXX C++ compiler. [c++]
CXXFLAGS Options to ${CXX}. [${CFLAGS}]
M68K_ELF2AOUT Convert ELF-format executable to a.out. [elf2aout]
MIPS_ELF2ECOFF Convert ELF-format executable to ECOFF. [elf2ecoff]
FC Fortran compiler. [f77]
FFLAGS Options to {$FC}. [-O]
HOST_SH Shell. This must be an absolute path, because it may be
substituted into "#!" lines in scripts. [/bin/sh]
INSTALL install(1) command. [install]
LEX Lexical analyzer. [lex]
LFLAGS Options to ${LEX}. []
LPREFIX Symbol prefix for ${LEX} (see -P option in lex(1)) [yy]
LD Linker. [ld]
LDFLAGS Options to ${CC} during the link process. []
LINT C program verifier. [lint]
LINTFLAGS Options to ${LINT}. [-chapbrxzgFS]
LORDER List dependencies for object files. [lorder]
MAKE make(1). [make]
MKDEP Construct Makefile dependency list. [mkdep]
MKDEPCXX Construct Makefile dependency list for C++ files. [mkdep]
NM List symbols from object files. [nm]
PC Pascal compiler. [pc] (Not present)
PFLAGS Options to ${PC}. []
OBJC Objective C compiler. [${CC}]
OBJCFLAGS Options to ${OBJC}. [${CFLAGS}]
OBJCOPY Copy and translate object files. [objcopy]
OBJCOPYLIBFLAGS Options to pass to objcopy when library objects are
being built. [${.TARGET} =~ "*.po" ? -X : -x]
OBJDUMP Display information from object files. [objdump]
RANLIB Generate index to archive. [ranlib]
READELF Display information from ELF object files. [readelf]
SIZE List section sizes and total size. [size]
STRINGS Display printable character sequences in files. [strings]
STRIP Discard symbols from object files. [strip]
TSORT Topological sort of a directed graph. [tsort -q]
YACC LALR(1) parser generator. [yacc]
YFLAGS Options to ${YACC}. []
YHEADER If defined, add "-d" to YFLAGS, and add dependencies
from <file>.y to <file>.h and <file>.c, and add
<foo>.h to CLEANFILES.
YPREFIX If defined, add "-p ${YPREFIX}" to YFLAGS.
Other variables of note (incomplete list):
NOCLANGERROR If defined and clang is used as C compiler, -Werror is not
passed to it.
NOGCCERROR If defined, prevents passing certain ${CFLAGS} to GCC
that cause warnings to be fatal, such as:
-Werror -Wa,--fatal-warnings
(The latter being for as(1).)
WARNS Crank up compiler warning options; the distinct levels are:
WARNS=1
WARNS=2
WARNS=3
WARNS=4
WARNS=5
WARNS=6
=-=-=-=-= bsd.host.mk =-=-=-=-=
This file is automatically included from bsd.own.mk. It contains settings
for all the HOST_* variables that are used in host programs and libraries.
HOST_AR The host archive processing command
HOST_CC The host c compiler
HOST_CFLAGS The host c compiler options
HOST_COMPILE.c The host c compiler line with options
HOST_COMPILE.cc The host c++ compiler line with options
HOST_CPP The host c pre-processor
HOST_CPPFLAGS The host c pre-processor options
HOST_CXX The host c++ compiler
HOST_CXXFLAGS The host c++ compiler options
HOST_INSTALL_DIR The host command to install a directory
HOST_INSTALL_FILE The host command to install a file
HOST_INSTALL_SYMLINK The host command to install a symlink
HOST_LD The host linker command
HOST_LDFLAGS The host linker options
HOST_LINK.c The host c linker line with options
HOST_LINK.cc The host c++ linker line with options
HOST_LN The host command to link two files
HOST_MKDEP The host command to create dependencies for c programs
HOST_MKDEPCXX The host command to create dependencies for c++ programs
HOST_OSTYPE The host OSNAME-RELEASE-ARCH tupple
HOST_RANLIB The host command to create random access archives
HOST_SH The host Bourne shell interpreter name (absolute path)