649 lines
23 KiB
Plaintext
649 lines
23 KiB
Plaintext
# $NetBSD: bsd.README,v 1.64 2000/06/23 06:11:05 thorpej Exp $
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# @(#)bsd.README 8.2 (Berkeley) 4/2/94
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This is the README file for the new make "include" files for the BSD
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source tree. The files are installed in /usr/share/mk, and are, by
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convention, named with the suffix ".mk".
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Note, this file is not intended to replace reading through the .mk
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files for anything tricky.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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RANDOM THINGS WORTH KNOWING:
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The files are simply C-style #include files, and pretty much behave like
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you'd expect. The syntax is slightly different in that a single '.' is
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used instead of the hash mark, i.e. ".include <bsd.prog.mk>".
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One difference that will save you lots of debugging time is that inclusion
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of the file is normally done at the *end* of the Makefile. The reason for
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this is because .mk files often modify variables and behavior based on the
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values of variables set in the Makefile. To make this work, remember that
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the FIRST target found is the target that is used, i.e. if the Makefile has:
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a:
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echo a
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a:
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echo a number two
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the command "make a" will echo "a". To make things confusing, the SECOND
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variable assignment is the overriding one, i.e. if the Makefile has:
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a= foo
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a= bar
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b:
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echo ${a}
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the command "make b" will echo "bar". This is for compatibility with the
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way the V7 make behaved.
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It's fairly difficult to make the BSD .mk files work when you're building
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multiple programs in a single directory. It's a lot easier split up the
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programs than to deal with the problem. Most of the agony comes from making
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the "obj" directory stuff work right, not because we switched to a new version
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of make. So, don't get mad at us, figure out a better way to handle multiple
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architectures so we can quit using the symbolic link stuff. (Imake doesn't
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count.)
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The file .depend in the source directory is expected to contain dependencies
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for the source files. This file is read automatically by make after reading
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the Makefile.
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The variable DESTDIR works as before. It's not set anywhere but will change
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the tree where the file gets installed.
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The profiled libraries are no longer built in a different directory than
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the regular libraries. A new suffix, ".po", is used to denote a profiled
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object, and ".so" denotes a shared (position-independent) object.
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The following variables that control how things are made/installed that
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are not set by default. These should not be set by Makefiles; they're for
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the user to define in MAKECONF (see bsd.own.mk, below) or on the make(1)
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command line:
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BUILD If defined, 'make install' checks that the targets in the
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source directories are up-to-date and remakes them if they
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are out of date, instead of blindly trying to install
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out of date or non-existant targets.
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UPDATE If defined, 'make install' only installs targets that are
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more recently modified in the source directories that their
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installed counterparts.
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UNPRIVILEGED If defined, don't set the owner/group/mode when installing
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files or directories. This allows a non-root "make install".
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MKCATPAGES If "no", don't build or install the catman pages.
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MKDOC If "no", don't build or install the documentation.
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MKINFO If "no", don't build or install Info documentation from
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Texinfo source files.
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MKLINT If "no", don't build or install the lint libraries.
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MKMAN If "no", don't build or install the man or catman pages.
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Also acts as "MKCATPAGES=no"
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MKNLS If "no", don't build or install the NLS files.
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MKOBJ If "no", don't enable the rule which creates objdirs.
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"yes" by default.
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MKOBJDIRS If "no", don't create objdirs during a "make build".
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"no" by default.
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MKPIC If "no", don't build or install shared libraries.
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MKPICINSTALL If "no", don't install the *_pic.a libraries.
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MKPROFILE If "no", don't build or install the profiling libraries.
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MKSHARE If "no", act as "MKCATPAGES=no MKDOC=no MKINFO=no MKMAN=no
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MKNLS=no". I.e, don't build catman pages, documentation,
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Info documentation, man pages, NLS files, ...
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <sys.mk> has the default rules for all makes, in the BSD
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environment or otherwise. You probably don't want to touch this file.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.man.mk> handles installing manual pages and their
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links.
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It has a two targets:
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maninstall:
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Install the manual page sources and their links.
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catinstall:
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Install the preformatted manual pages and their links.
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It sets/uses the following variables:
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MANDIR Base path for manual installation.
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MANGRP Manual group.
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MANOWN Manual owner.
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MANMODE Manual mode.
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MANSUBDIR Subdirectory under the manual page section, i.e. "/vax"
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or "/tahoe" for machine specific manual pages.
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MAN The manual pages to be installed (use a .1 - .9 suffix).
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MLINKS List of manual page links (using a .1 - .9 suffix). The
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linked-to file must come first, the linked file second,
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and there may be multiple pairs. The files are soft-linked.
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The include file <bsd.man.mk> includes a file named "../Makefile.inc" if
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it exists.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.own.mk> contains source tree configuration parameters,
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such as the owners, groups, etc. for both manual pages and binaries, and
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a few global "feature configuration" parameters.
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It has no targets.
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To get system-specific configuration parameters, bsd.own.mk will try to
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include the file specified by the "MAKECONF" variable. If MAKECONF is not
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set, or no such file exists, the system make configuration file, /etc/mk.conf
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is included. These files may define any of the variables described below.
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bsd.own.mk sets the following variables, if they are not already defined
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(defaults are in brackets):
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BSDSRCDIR The real path to the system sources, so that 'make obj'
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will work correctly. [/usr/src]
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BSDOBJDIR The real path to the system 'obj' tree, so that 'make obj'
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will work correctly. [/usr/obj]
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BINGRP Binary group. [wheel]
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BINOWN Binary owner. [root]
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BINMODE Binary mode. [555]
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NONBINMODE Mode for non-executable files. [444]
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MANDIR Base path for manual installation. [/usr/share/man/cat]
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MANGRP Manual group. [wheel]
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MANOWN Manual owner. [root]
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MANMODE Manual mode. [${NONBINMODE}]
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MANINSTALL Manual installation type: maninstall, catinstall, or both
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LIBDIR Base path for library installation. [/usr/lib]
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LINTLIBDIR Base path for lint(1) library installation. [/usr/libdata/lint]
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LIBGRP Library group. [${BINGRP}]
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LIBOWN Library owner. [${BINOWN}]
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LIBMODE Library mode. [${NONBINMODE}]
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DOCDIR Base path for system documentation (e.g. PSD, USD, etc.)
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installation. [/usr/share/doc]
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HTMLDOCDIR Base path for html system documentation installation.
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[/usr/share/doc/html]
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DOCGRP Documentation group. [wheel]
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DOCOWN Documentation owner. [root]
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DOCMODE Documentation mode. [${NONBINMODE}]
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NLSDIR Base path for National Language Support files installation.
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[/usr/share/nls]
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NLSGRP National Language Support files group. [wheel]
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NLSOWN National Language Support files owner. [root]
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NLSMODE National Language Support files mode. [${NONBINMODE}]
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STRIPFLAG The flag passed to the install program to cause the binary
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to be stripped. This is to be used when building your
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own install script so that the entire system can be made
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stripped/not-stripped using a single knob. [-s]
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COPY The flag passed to the install program to cause the binary
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to be copied rather than moved. This is to be used when
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building our own install script so that the entire system
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can either be installed with copies, or with moves using
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a single knob. [-c]
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Additionally, the following variables may be set by bsd.own.mk or in a
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make configuration file to modify the behaviour of the system build
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process (default values are in brackets along with comments, if set by
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bsd.own.mk):
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MKCRYPTO If set to "no", no cryptography support will be built
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into the system. Defaults to "yes".
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NOCRYPTO If set, it is equivalent to setting MKCRYPTO to "no".
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MKCRYPTO_RSA If set to "no", RSA support will not be built into
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the system's cryptography libraries. This implies
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that SSLv2 support will not be present. Defaults to "yes".
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NOCRYPTO_RSA If set, it is equivalent to setting MKCRYPTO_RSA to "no".
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MKCRYPTO_IDEA If set to "no", IDEA support will not be built into
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the system's cryptography libraries. Defaults to "yes".
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NOCRYPTO_IDEA If set, it is equivalent to setting MKCRYPTO_IDEA to "no".
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MKCRYPTO_RC5 If set to "no", RC5 support will not be built into
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the system's cryptography libraries. Defaults to "yes".
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NOCRYPTO_RC5 If set, it is equivalent to setting MKCRYPTO_RC5 to "no".
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MKKERBEROS If set to "no", disables building Kerberos (v4 or v5)
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support into various system utilities that support it.
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Defaults to "yes". NOTE: This does not affect the
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building of the Kerberos libraries or infrastructure
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programs themselves. To completely disable Kerberos,
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set MKCRYPTO to "no".
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NOKERBEROS If set, it is equivalent to setting MKKERBEROS to "no".
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SKEY Compile in support for S/key authentication. [yes, set
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unconditionally]
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MANZ Compress manual pages at installation time.
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SYS_INCLUDE Copy or symlink kernel include files into /usr/include.
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Possible values are "symlinks" or "copies" (which is
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the same as the variable being unset).
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NOPROFILE Do not build profiled versions of system libraries
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NOPIC Do not build PIC versions of system libraries, and
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do not build shared libraries. [set if ${MACHINE_ARCH}
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is "sparc64", unset otherwise.]
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NOLINT Do not build lint libraries.
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OBJECT_FMT Object file format. [set to "ELF" on architectures that
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use ELF -- currently if ${MACHINE_ARCH} is "alpha",
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"mipsel", "mipseb", "powerpc", "sparc", "sparc64",
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and "i386", or set to "a.out" on other architectures].
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bsd.own.mk is generally useful when building your own Makefiles so that
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they use the same default owners etc. as the rest of the tree.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.prog.mk> handles building programs from one or
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more source files, along with their manual pages. It has a limited number
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of suffixes, consistent with the current needs of the BSD tree.
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It has eight targets:
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all:
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build the program and its manual page
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clean:
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remove the program, any object files and the files a.out,
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Errs, errs, mklog, and ${PROG}.core.
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cleandir:
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remove all of the files removed by the target clean, as
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well as .depend, tags, and any manual pages.
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`distclean' is a synonym for `cleandir'.
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depend:
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make the dependencies for the source files, and store
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them in the file .depend.
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includes:
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install any header files.
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install:
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install the program and its manual pages; if the Makefile
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does not itself define the target install, the targets
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beforeinstall and afterinstall may also be used to cause
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actions immediately before and after the install target
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is executed.
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lint:
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run lint on the source files
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tags:
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create a tags file for the source files.
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It sets/uses the following variables:
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BINGRP Binary group.
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BINOWN Binary owner.
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BINMODE Binary mode.
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CLEANFILES Additional files to remove for the clean and cleandir targets.
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COPTS Additional flags to the compiler when creating C objects.
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CPPFLAGS Additional flags to the C pre-processor
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LDADD Additional loader objects. Usually used for libraries.
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For example, to load with the compatibility and utility
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libraries, use:
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LDADD+=-lutil -lcompat
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LDFLAGS Additional loader flags.
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LINKS The list of binary links; should be full pathnames, the
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linked-to file coming first, followed by the linked
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file. The files are hard-linked. For example, to link
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/bin/test and /bin/[, use:
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LINKS= ${DESTDIR}/bin/test ${DESTDIR}/bin/[
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SYMLINKS The list of symbolic links; should be full pathnames.
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Syntax is identical to LINKS. Note that DESTDIR is not
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automatically included in the link.
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MAN Manual pages (should end in .1 - .9). If no MAN variable is
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defined, "MAN=${PROG}.1" is assumed.
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PROG The name of the program to build. If not supplied, nothing
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is built.
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PROGNAME The name that the above program will be installed as, if
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different from ${PROG}.
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SRCS List of source files to build the program. If SRCS is not
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defined, it's assumed to be ${PROG}.c.
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DPADD Additional dependencies for the program. Usually used for
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libraries. For example, to depend on the compatibility and
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utility libraries use:
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DPADD+=${LIBCOMPAT} ${LIBUTIL}
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The following libraries are predefined for DPADD:
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LIBCRT0?= ${DESTDIR}/usr/lib/crt0.o
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LIBC?= ${DESTDIR}/usr/lib/libc.a
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LIBC_PIC?= ${DESTDIR}/usr/lib/libc_pic.a
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LIBCOMPAT?= ${DESTDIR}/usr/lib/libcompat.a
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LIBCRYPT?= ${DESTDIR}/usr/lib/libcrypt.a
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LIBCURSES?= ${DESTDIR}/usr/lib/libcurses.a
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LIBDBM?= ${DESTDIR}/usr/lib/libdbm.a
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LIBDES?= ${DESTDIR}/usr/lib/libdes.a
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LIBEDIT?= ${DESTDIR}/usr/lib/libedit.a
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LIBGCC?= ${DESTDIR}/usr/lib/libgcc.a
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LIBGNUMALLOC?= ${DESTDIR}/usr/lib/libgnumalloc.a
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LIBIPSEC?= ${DESTDIR}/usr/lib/libipsec.a
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LIBKDB?= ${DESTDIR}/usr/lib/libkdb.a
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LIBKRB?= ${DESTDIR}/usr/lib/libkrb.a
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LIBKVM?= ${DESTDIR}/usr/lib/libkvm.a
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LIBL?= ${DESTDIR}/usr/lib/libl.a
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LIBM?= ${DESTDIR}/usr/lib/libm.a
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LIBMENU?= ${DESTDIR}/usr/lib/libmenu.a
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LIBMP?= ${DESTDIR}/usr/lib/libmp.a
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LIBNTP?= ${DESTDIR}/usr/lib/libntp.a
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LIBPC?= ${DESTDIR}/usr/lib/libpc.a
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LIBPCAP?= ${DESTDIR}/usr/lib/libpcap.a
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LIBPLOT?= ${DESTDIR}/usr/lib/libplot.a
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LIBPOSIX?= ${DESTDIR}/usr/lib/libposix.a
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LIBRESOLV?= ${DESTDIR}/usr/lib/libresolv.a
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LIBRPCSVC?= ${DESTDIR}/usr/lib/librpcsvc.a
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LIBSKEY?= ${DESTDIR}/usr/lib/libskey.a
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LIBTERMCAP?= ${DESTDIR}/usr/lib/libtermcap.a
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LIBTELNET?= ${DESTDIR}/usr/lib/libtelnet.a
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LIBUTIL?= ${DESTDIR}/usr/lib/libutil.a
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LIBWRAP?= ${DESTDIR}/usr/lib/libwrap.a
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LIBY?= ${DESTDIR}/usr/lib/liby.a
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LIBZ?= ${DESTDIR}/usr/lib/libz.a
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SHAREDSTRINGS If defined, a new .c.o rule is used that results in shared
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strings, using xstr(1). Note that this will not work with
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parallel makes.
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STRIPFLAG The flag passed to the install program to cause the binary
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to be stripped.
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SUBDIR A list of subdirectories that should be built as well.
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Each of the targets will execute the same target in the
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subdirectories.
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SCRIPTS A list of interpreter scripts [file.{sh,csh,pl,awk,...}].
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These are installed exactly like programs.
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SCRIPTSNAME The name that the above program will be installed as, if
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different from ${SCRIPTS}. These can be further specialized
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by setting SCRIPTSNAME_<script>.
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FILES A list of files to install. The installation is controlled
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by the FILESNAME, FILESOWN, FILESGRP, FILESMODE, FILESDIR
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variables that can be further specialized by FILES<VAR>_<file>
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The include file <bsd.prog.mk> includes the file named "../Makefile.inc"
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if it exists, as well as the include file <bsd.man.mk>.
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Some simple examples:
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To build foo from foo.c with a manual page foo.1, use:
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PROG= foo
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.include <bsd.prog.mk>
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To build foo from foo.c with a manual page foo.2, add the line:
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MAN= foo.2
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If foo does not have a manual page at all, add the line:
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NOMAN= noman
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If foo has multiple source files, add the line:
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SRCS= a.c b.c c.c d.c
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.subdir.mk> contains the default targets for building
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subdirectories. It has the same eight targets as <bsd.prog.mk>: all,
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clean, cleandir, depend, includes, install, lint, and tags. For all of
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the directories listed in the variable SUBDIRS, the specified directory
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will be visited and the target made. There is also a default target which
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allows the command "make subdir" where subdir is any directory listed in
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the variable SUBDIRS.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.links.mk> handles the LINKS and SYMLINKS variables
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and is included from from bsd.lib.mk and bsd.prog.mk.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.files.mk> handles the FILES variables and is included
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from bsd.lib.mk and bsd.prog.mk.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.inc.mk> defines the includes target and uses two
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variables:
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INCS The list of include files
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INCSDIR The location to install the include files.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.kinc.mk> defines the many targets (includes,
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subdirectories, etc.), and is used by kernel makefiles to handle
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include file installation. It is intended to be included alone, by
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kernel Makefiles. Please see bsd.kinc.mk for more details, and keep
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the documentation in that file up to date.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.info.mk> is used to generate and install GNU Info
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documentation from respective Texinfo source files. It defines three
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implicit targets (.txi.info, .texi.info, and .texinfo.info), and uses the
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following variables:
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TEXINFO List of Texinfo source files. Info documentation will
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consist of single files with the extension replaced by
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.info.
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INFOFLAGS Flags to pass to makeinfo. []
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INSTALL_INFO Name of install-info program. [install-info]
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MAKEINFO Name of makeinfo program. [makeinfo]
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The include file <bsd.sys.mk> is used by <bsd.prog.mk> and
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<bsd.lib.mk>. It contains overrides that are used when building
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the NetBSD source tree. For instance, if "PARALLEL" is defined by
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the program/library Makefile, it includes a set of rules for lex and
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yacc that allow multiple lex and yacc targets to be built in parallel.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.lib.mk> has support for building libraries. It has
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the same eight targets as <bsd.prog.mk>: all, clean, cleandir, depend,
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includes, install, lint, and tags. Additionally, it has a checkver target
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which checks for installed shared object libraries whose version is greater
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that the version of the source. It has a limited number of suffixes,
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consistent with the current needs of the BSD tree.
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It sets/uses the following variables:
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LIB The name of the library to build.
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LIBDIR Target directory for libraries.
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LINTLIBDIR Target directory for lint libraries.
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LIBGRP Library group.
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LIBOWN Library owner.
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LIBMODE Library mode.
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LDADD Additional loader objects.
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MAN The manual pages to be installed (use a .1 - .9 suffix).
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MKLINKLIB If "no", act as "MKPICINSTALL=no MKPROFILE=no".
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Also:
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- don't install the .a libraries
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- don't install _pic.a libraries on PIC systems
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- don't build .a libraries on PIC systems
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- don't install the .so symlink on ELF systems
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I.e, only install the shared library (and the .so.major
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symlink on ELF).
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MKPICLIB If "no", don't build _pic.a libraries, and build the
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shared object libraries from the .a libraries. A
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symlink is installed in ${DESTDIR}/usr/lib for the
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_pic.a library pointing to the .a library.
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NOCHECKVER_<library>
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NOCHECKVER If set, disables checking for installed shared object
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libraries with versions greater than the source. A
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particular library name, without the "lib" prefix, may
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be appended to the variable name to disable the check for
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only that library.
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SRCS List of source files to build the library. Suffix types
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.s, .c, and .f are supported. Note, .s files are preferred
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to .c files of the same name. (This is not the default for
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versions of make.)
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The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
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if it exists, as well as the include file <bsd.man.mk>.
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It has rules for building profiled objects; profiled libraries are
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built by default.
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Libraries are ranlib'd when made.
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The include file <bsd.obj.mk> defines targets related to the creation
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and use of separated object and source directories.
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If an environment variable named MAKEOBJDIRPREFIX is set, make(1) uses
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${MAKEOBJDIRPREFIX}${.CURDIR} as the name of the object directory if
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it exists. Otherwise make(1) looks for the existance of a
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subdirectory (or a symlink to a directory) of the source directory
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into which built targets should be placed. If an environment variable
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named MAKEOBJDIR is set, make(1) uses its value as the name of the
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object directory; failing that, make first looks for a subdirectory
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named "obj.${MACHINE}", and if that doesn't exist, it looks for "obj".
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Object directories are not created automatically by make(1) if they
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don't exist; you need to run a separate "make obj". (This will happen
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during a top-level build if "MKOBJDIRS" is set to a value other than
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"no"). When the source directory is a subdirectory of ${BSDSRCDIR} --
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and this is determined by a simple string prefix comparison -- object
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directories are created in a separate object directory tree, and a
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symlink to the object directory in that tree is created in the source
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directory; otherwise, "make obj" assumes that you're not in the main
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source tree and that it's not safe to use a separate object tree.
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Several variables used by <bsd.obj.mk> control exactly what
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directories and links get created during a "make obj":
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MAKEOBJDIR If set, this is the component name of the object
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directory.
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OBJMACHINE If this is set but MAKEOBJDIR is not set, creates
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object directories or links named "obj.${MACHINE}";
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otherwise, just creates ones named "obj".
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USR_OBJMACHINE If set, and the current directory is a subdirectory of
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${BSDSRCDIR}, create object directory in the
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corresponding subdirectory of ${BSDOBJDIR}.${MACHINE};
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otherwise, create it in the corresponding subdirectory
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of ${BSDOBJDIR}
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.kernobj.mk> defines variables related to the
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location of kernel sources and object directories.
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KERNSRCDIR Is the location of the top of the kernel src.
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It defaults to ${BSDSRCDIR}/sys, but the top-level
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Makefile.inc sets it to ${ABSTOP}/sys (ABSTOP is the
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absolute path to the directory where the top-level
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Makefile.inc was found.
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KERNARCHDIR Is the location of the machine dependent kernel
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sources. It defaults to arch/${MACHINE}
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KERNCONFDIR Is where the configuration files for kernels are
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found; default is ${KERNSRCDIR}/${KERNARCHDIR}/conf.
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KERNOBJDIR Is the kernel build directory. The kernel GENERIC for
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instance will be compiled in ${KERNOBJDIR}/GENERIC.
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The default value is
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${MAKEOBJDIRPREFIX}${KERNSRCDIR}/${KERNARCHDIR}/compile
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if it exists or the target 'obj' is being made.
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Otherwise the default is
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${KERNSRCDIR}/${KERNARCHDIR}/compile.
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It is important that Makefiles (such as those under src/distrib) that
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wish to find compiled kernels use bsd.kernobj.mk and ${KERNOBJDIR}
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rather than make assumptions about the location of the compiled kernel.
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