bsd.README revision 1.308
1#	$NetBSD: bsd.README,v 1.308 2012/11/19 16:04:54 apb Exp $
2#	@(#)bsd.README	8.2 (Berkeley) 4/2/94
3
4This is the README file for the make "include" files for the NetBSD
5source tree.  The files are installed in /usr/share/mk, and are,
6by convention, named with the suffix ".mk".
7
8Note, this file is not intended to replace reading through the .mk
9files for anything tricky.
10
11=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
12
13RANDOM THINGS WORTH KNOWING:
14
15The files are simply C-style #include files, and pretty much behave like
16you'd expect.  The syntax is slightly different in that a single '.' is
17used instead of the hash mark, i.e. ".include <bsd.prog.mk>".
18
19One difference that will save you lots of debugging time is that inclusion
20of the file is normally done at the *end* of the Makefile.  The reason for
21this is because .mk files often modify variables and behavior based on the
22values of variables set in the Makefile.  To make this work, remember that
23the FIRST target found is the target that is used, i.e. if the Makefile has:
24
25	a:
26		echo a
27	a:
28		echo a number two
29
30the command "make a" will echo "a".  To make things confusing, the SECOND
31variable assignment is the overriding one, i.e. if the Makefile has:
32
33	a=	foo
34	a=	bar
35
36	b:
37		echo ${a}
38
39the command "make b" will echo "bar".  This is for compatibility with the
40way the V7 make behaved.
41
42It's fairly difficult to make the BSD .mk files work when you're building
43multiple programs in a single directory.  It's a lot easier to split up the
44programs than to deal with the problem.  Most of the agony comes from making
45the "obj" directory stuff work right, not because we switched to a new version
46of make.  So, don't get mad at us, figure out a better way to handle multiple
47architectures so we can quit using the symbolic link stuff.  (Imake doesn't
48count.)
49
50The file .depend in the source directory is expected to contain dependencies
51for the source files.  This file is read automatically by make after reading
52the Makefile.
53
54The variable DESTDIR works as before.  It's not set anywhere but will change
55the tree where the file gets installed.
56
57The profiled libraries are no longer built in a different directory than
58the regular libraries.  A new suffix, ".po", is used to denote a profiled
59object, and ".pico" denotes a shared (position-independent) object.
60
61There are various make variables used during the build.
62
63Many variables support a (case sensitive) value of "no" or "yes",
64and are tested with  ${VAR} == "no"  and  ${VAR} != "no" .
65
66
67The basic rule for the variable naming scheme is as follows:
68
69HOST_xxx	A command that runs on the host machine regardless of
70		whether or not the system is being cross compiled, or
71		flags for such a command.
72
73MKxxx		Can be set to "no" to disable functionality, or
74		"yes" to enable it.
75		Usually defaults to "yes", although some variables
76		default to "no".
77		Due to make(1) implementation issues, if a temporary
78		command-line override of a mk.conf(5) or <bsd.own.mk>
79		setting is required whilst still honoring a particular
80		Makefile's setting of MKxxx, use
81			env MKxxx=value make
82		instead of
83			make MKxxx=value
84
85NOxxx		If defined, disables a feature.
86		Not intended for users.
87		This is to allow Makefiles to disable functionality
88		that they don't support (such as missing man pages).
89		NOxxx variables must be defined before <bsd.own.mk>
90		is included.
91
92TOOL_xxx	A tool that is provided as part of the USETOOLS
93		framework.  When not using the USETOOLS framework,
94		TOOL_xxx variables should refer to tools that are
95		already installed on the host system.
96
97The following variables that control how things are made/installed that
98are not set by default. These should not be set by Makefiles; they're for
99the user to define in MAKECONF (see <bsd.own.mk>, below, or mk.conf(5))
100or on the make(1) command line:
101
102BUILD 		If defined, 'make install' checks that the targets in the
103		source directories are up-to-date and remakes them if they
104                are out of date, instead of blindly trying to install
105                out of date or non-existent targets.
106
107MAKEVERBOSE	Control how "verbose" the standard make(1) rules are.
108		Default: 2
109		Supported values:
110		    0	Minimal output ("quiet")
111		    1	Describe what is occurring
112		    2	Describe what is occurring and echo the actual command
113		    3	Ignore the effect of the "@" prefix in make commands
114		    4	Trace shell commands using the shell's -x flag
115
116MKATF		If "no", don't build libatf-c, libatf-c++ libraries associated
117		with the Automated Testing Framework (ATF).
118		Default: yes
119
120MKBFD		Obsolete, use MKBINUTILS
121
122MKBINUTILS	If "no", don't build binutils (gas, ld, etc and libbfd,
123		libopcodes)
124		Default: yes
125
126MKBSDTAR	If "yes", use the libarchive based cpio and tar instead of
127		the pax frontends.
128		Default: no
129
130MKCATPAGES	If "no", don't build or install the catman pages.
131		Default: no
132
133MKCOMPAT  	If "no", don't build or install the src/compat.
134		Default: yes on amd64/mips64/sparc64, no elsewhere.
135
136MKCOMPLEX	If "no", don't build libm support for <complex.h>
137		Default: yes
138
139MKCRYPTO	If "no", no cryptography support will be built into the system,
140		and also acts as "MKKERBEROS=no".
141		Default: yes
142
143MKCRYPTO_RC5	If not "no", RC5 support will be built into libcrypto_rc5
144		Default: no
145
146MKCVS		If "no", don't build or install cvs(1).
147		Default: yes
148
149MKDEBUG		If "no", don't build and install separate debugging symbols
150		into /usr/libdata/debug.
151		Default: no
152
153MKDEBUGLIB	Build *_g.a debugging libraries, which are compiled
154		with -DDEBUG.
155		Default: no
156
157MKDOC		If "no", don't build or install the documentation.
158		Default: yes
159
160MKDTRACE	If "no", do not build and install the kernel modules,
161		utilities and libraries used to implement the dtrace(1)
162		facility.
163		Default: no
164
165MKDYNAMICROOT	If "no", build programs in /bin and /sbin statically,
166		don't install certain libraries in /lib, and don't
167		install the shared linker into /libexec.
168		Default: yes
169
170MKEXTSRC        If not "no", 'make build' also descends into either src/extsrc
171		to cross-build programs and libraries externally added by
172		users, and automatically enables creation of those sets.
173		Default: no
174
175MKGCC		If "no", don't build gcc(1) or any of the GCC-related
176		libraries (libgcc, libobjc, libstdc++).
177		Default: yes
178
179MKGCCCMDS	If "no", don't build gcc(1), but do build the GCC-related
180		libraries (libgcc, libobjc, libstdc++).
181		Default: yes
182
183MKGDB		If "no", don't build gdb(1).
184		Default: yes
185
186MKHESIOD	If "no", disables building of Hesiod infrastructure
187		(libraries and support programs).
188		Default: yes
189
190MKHOSTOBJ	If not "no", for programs intended to be run on the compile
191		host, the name, release, and architecture of the host
192		operating system will be suffixed to the name of the object
193		directory created by "make obj".
194		Default: no
195
196MKHTML		If "no", don't build or install the HTML man pages.
197		Default: yes
198
199MKIEEEFP	If "no", don't add code for IEEE754/IEC60559 conformance.
200		Has no effect on most platforms.
201		Default: yes
202
203MKSTRIPIDENT	Strip the RCS IDs from program binaries and shared libraries.
204		Default: no
205
206MKINET6		If "no", disables building of INET6 (IPv6) infrastructure
207		(libraries and support programs).  This option must not be
208		set to "no" if MKX11 is not "no".
209		Default: yes
210
211MKINFO		If "no", don't build or install Info documentation from
212		Texinfo source files.
213		Default: yes
214
215MKIPFILTER	If "no", don't build or install the IP Filter programs and LKM.
216		Default: yes
217
218MKISCSI		If "no", don't build or install iSCSI library or applications
219		(depends on libpthread.)
220		Default: yes
221
222MKKERBEROS	If "no", disables building of Kerberos v5
223		infrastructure (libraries and support programs).
224		Default: yes
225
226MKKMOD		If "no", disables building of kernel modules.
227		Default: yes
228
229MKLDAP		If "no", disables building of LDAP infrastructure
230		(libraries and support programs).
231		Default: yes
232
233MKLINKLIB	If "no", act as "MKLINT=no MKPICINSTALL=no MKPROFILE=no".
234		Also:
235			- don't install the .a libraries
236			- don't install _pic.a libraries on PIC systems
237			- don't build .a libraries on PIC systems
238			- don't install the .so symlink on ELF systems
239		I.e, only install the shared library (and the .so.major
240		symlink on ELF).
241		Default: yes
242
243MKLINT		If "no", don't build or install the lint libraries.
244		Default: yes
245
246MKLVM		If "no", don't build or install the logical volume manager
247		and device mapper tools and libraries
248		Default: yes
249
250MKMAN		If "no", don't build or install the man or catman pages,
251		and also acts as "MKCATPAGES=no MKHTML=no".
252		Default: yes
253
254MKMANDOC	If "yes", mandoc is built as tool and used to compile
255		catman or html pages.  A directory can be exempted by
256		defining NOMANDOC.  Individual man pages are exempted
257		if NOMANDOC.${target} is set to "yes".
258		Default: yes
259
260MKMANZ		If not "no", compress manual pages at installation time.
261		Default: no
262
263MKMDNS		If "no", disables building of mDNS infrastructure
264		(libraries and support programs).
265		Default: yes
266
267MKNLS		If "no", don't build or install the NLS files and locale
268		definition files.
269		Default: yes
270
271MKNPF		If "no", don't build or install the NPF and its modules.
272		Default: yes
273
274MKOBJ		If "no", don't enable the rule which creates objdirs,
275		and also acts as "MKOBJDIRS=no".
276		Default: yes
277
278MKOBJDIRS	If "no", don't create objdirs during a "make build".
279		Default: no
280
281MKPAM		If "no", disables building of PAM authentication
282		infrastructure (libraries and support programs).
283		Default: yes
284
285MKPCC		If "no", don't build pcc(1) or any of the PCC-related
286		libraries (libpcc, libpccsoftfloat).
287		Default: no
288
289MKPF		If "no", don't build or install the pf programs and LKM.
290		Default: yes
291
292MKPIC		If "no", don't build or install shared libraries, and
293		also acts as "MKPICLIB=no"
294		Default: yes (for MACHINE_ARCHs that support it)
295
296MKPICINSTALL	If "no", don't install the *_pic.a libraries.
297		Default: yes
298
299MKPICLIB	If "no", don't build *_pic.a libraries, and build the
300		shared object libraries from the .a libraries.
301		A symlink is installed in ${DESTDIR}/usr/lib for the
302		_pic.a library pointing to the .a library.
303		Default: yes
304
305MKPIE		If "no", create regular executables. Otherwise create
306		PIE (Position Independent Executables).
307		Default: no
308
309MKPIGZGZIP	If "no", only install pigz as pigz, not gzip.
310		Default: no
311
312MKPOSTFIX	If "no", don't build or install postfix(1).
313		Default: yes
314
315MKPROFILE	If "no", don't build or install the profiling (*_p.a) libraries.
316		Default: yes
317
318MKREPRO         If "yes", create reproducable builds. This enables
319		different switches to make two builds from the same source tree
320		result in the same build results.
321		Default: no
322
323MKSHARE		If "no", act as "MKCATPAGES=no MKDOC=no MKHTML=no MKINFO=no
324		MKMAN=no MKNLS=no".
325		I.e, don't build catman pages, documentation, Info
326		documentation, man pages, NLS files, ...
327		Default: yes
328
329MKSKEY		If "no", disables building of S/key authentication
330		infrastructure (libraries and support programs).
331		Default: yes
332
333MKSOFTFLOAT	If not "no", build with options to enable the compiler to
334		generate output containing library calls for floating
335		point and possibly soft-float library support.
336		Default: no
337
338MKSTATICLIB	If "no", don't build or install the normal static (*.a)
339		libraries.
340		Default: yes
341
342MKTPM		If "no" then don't build the Trusted Platform Module
343		infrastructure.
344		Default: no
345
346MKUNPRIVED	If not "no", don't set the owner/group/mode when installing
347		files or directories, and keep a metadata log of what
348		the owner/group/mode should be.  This allows a
349		non-root "make install".
350		Default: no
351
352MKUPDATE 	If not "no", 'make install' only installs targets that are
353		more recently modified in the source directories that their
354		installed counterparts.
355		Default: no
356
357MKX11		If not "no", depending on the value of ${X11FLAVOUR},
358		'make build' also descends into either src/x11 (XFree86) or
359		src/external/mit/xorg (modular Xorg) to cross-build X11 and
360		automatically enables creation of X sets.
361		Default: no
362
363MKX11FONTS	If not "no", if ${X11FLAVOUR} is "Xorg", do not build or
364		install the X fonts.  The xfont set is still created but
365		will be empty.
366		Default: yes
367
368MKYP		If "no", disables building of YP (NIS)
369		infrastructure (libraries and support programs).
370		Default: yes
371
372MKZFS		If "no", do not build and install utilities and libraries
373		used to manage ZFS file system. Do not build zfs and solaris
374		compatibility kernel modules.
375		Default: yes on i386/amd64, no elsewhere.
376
377MKRUMP		If "no", do not build and install rump related headers,
378		libraries, and programs.
379		Default: yes
380
381USE_HESIOD	If "no", disables building Hesiod support into
382		various system utilities/libraries that support it.
383		If ${MKHESIOD} is "no", USE_HESIOD will also be
384		forced to "no".
385
386USE_INET6	If "no", disables building INET6 (IPv6) support into
387		various system utilities/libraries that support it.
388		If ${MKINET6} is "no", USE_INET6 will also be
389		forced to "no".
390
391USE_JEMALLOC	If "no", disables building the "jemalloc" allocator
392		designed for improved performance with threaded
393		applications.  The "phkmalloc" allocator as used up
394		before NetBSD-5.0 will be substituted.
395
396USE_KERBEROS	If "no", disables building Kerberos v5
397		support into various system utilities/libraries that
398		support it.  If ${MKKERBEROS} is "no", USE_KERBEROS
399		will also be forced to "no".
400
401USE_LDAP	If "no", disables building LDAP support into various
402		system utilities/libraries that support it.
403		If ${MKLDAP} is "no", USE_LDAP will also be forced to "no".
404
405USE_PAM		If "no", disables building PAM authentication support
406		into various system utilities/libraries that support it.
407		If ${MKPAM} is "no", USE_PAM will also be forced to "no".
408
409USE_SKEY	If "no", disables building S/key authentication
410		support into various system utilities/libraries that
411		support it.  If ${MKSKEY} is "no", USE_SKEY will
412		also be forced to "no".
413		Default: no
414
415USE_SSP		If "no", disables GCC stack protection code, which
416		detects stack overflows and aborts the program. The
417		stack protection code imposes a performance penalty
418		of about 5%.
419		Default: "no", unless "USE_FORT" is set to "yes"
420
421USE_FORT 	If "yes" turns on substitute wrappers for commonly used
422		functions that do not do bounds checking regularly, but
423		they could in some cases by using the gcc
424		__builtin_object_size() function to determine the buffer
425		size where it is known and detect buffer overflows.
426		These substitute functions are in /usr/include/ssp.
427		Default: depends on the part of the source tree
428
429USE_YP		If "no", disables building YP (NIS) support into
430		various system utilities/libraries that support it.
431		If ${MKYP} is "no", USE_YP will also be forced to "no".
432
433USE_PIGZGZIP	If "no", use the host "gzip" program to compress things.
434		Otherwise, build tools/pigz and use nbpigz to compress
435		things.
436		Default: "no".
437
438X11FLAVOUR	Set to "Xorg" or "XFree86", depending on whether to build
439		XFree86 or modular Xorg.  Only matters if MKX11!=no.
440		Default: "Xorg" on amd64, i386, macppc, shark and sparc64,
441		"XFree86" on everything else.
442
443COPTS.lib<lib>
444OBJCOPTS.lib<lib>
445LDADD.lib<lib>
446CPPFLAGS.lib<lib>
447CXXFLAGS.lib<lib>
448COPTS.<prog>
449OBJCCOPTS.<prog>
450LDADD.<prog>
451CPPFLAGS.<prog>
452CXXFLAGS.<prog>	These provide a way to specify additions to the associated
453		variables in a way that applies only to a particular library
454		or program.  <lib> corresponds to the LIB variable set in
455		the library's makefile.  <prog> corresponds to either PROG
456		or PROG_CXX (if set).  For example, if COPTS.libcrypto is
457		set to "-g", "-g" will be added to COPTS only when compiling
458		the crypto library.
459
460The active compiler is selected using the following variables:
461AVAILABLE_COMPILER
462		List of available compiler suites.  Processed in order
463		for selecting the active compiler for each frontend.
464HAVE_PCC	If defined, PCC is present and enabled.
465HAVE_LLVM	If defined, LLVM/Clang is present and enabled.
466UNSUPPORTED_COMPILER.xxx
467		If defined, the support for compiler "xxx" is disabled.
468
469For the frontends (CC, CPP, CXX, FC and OBJC) the following variables exist:
470ACTIVE_CC	Active compile suite for the CC frontend.
471SUPPORTED_CC	Compile suite with support for the CC frontend.
472TOOL_CC.xxx	Path to the CC frontend for compiler "xxx"
473
474=-=-=-=-=   sys.mk   =-=-=-=-=
475
476The include file <sys.mk> has the default rules for all makes, in the BSD
477environment or otherwise.  You probably don't want to touch this file.
478
479=-=-=-=-=   bsd.own.mk   =-=-=-=-=
480
481The include file <bsd.own.mk> contains source tree configuration parameters,
482such as the owners, groups, etc. for both manual pages and binaries, and
483a few global "feature configuration" parameters.
484
485It has no targets.
486
487To get system-specific configuration parameters, <bsd.own.mk> will try to
488include the file specified by the "MAKECONF" variable.  If MAKECONF is not
489set, or no such file exists, the system make configuration file, /etc/mk.conf
490is included.  These files may define any of the variables described below.
491
492<bsd.own.mk> sets the following variables, if they are not already defined
493(defaults are in brackets):
494
495NETBSDSRCDIR	Top of the NetBSD source tree.
496		If _SRC_TOP_ != "", that will be used as the default,
497		otherwise BSDSRCDIR will be used as the default.
498		Various makefiles within the NetBSD source tree will
499		use this to reference the top level of the source tree.
500
501_SRC_TOP_	Top of the system source tree, as determined by <bsd.own.mk>
502		based on the presence of tools/ and build.sh.  This variable
503		is "internal" to <bsd.own.mk>, although its value is only
504		determined once and then propagated to all sub-makes.
505
506_NETBSD_VERSION_DEPENDS
507		A list of files which contain information about
508		the version of the NetBSD being built.  This is
509		defined only if the current directory appears
510		to be inside a NetBSD source tree.  The list of
511		files includes ${NETBSDSRCDIR}/sys/sys/param.h
512		(which contains the kernel version number),
513		${NETBSDSRCDIR}/sys/conf/newvers.sh and
514		${NETBSDSRCDIR}/sys/conf/osrelease.sh (which
515		interpret the information in sys/sys/param.h), and
516		${_SRC_TOP_OBJ_}/params (which is an optional file,
517		created by "make build" in ${_SRC_TOP_}/Makefile,
518		containing all the variables that may influence the
519		build).
520
521		Targets that depend on the NetBSD version, or on
522		variables defined at build time, can declare a
523		dependency on ${_NETBSD_VERSION_DEPENDS}, like this:
524
525			version.c: ${_NETBSD_VERSION_DEPENDS}
526				commands to create version.c
527
528BSDSRCDIR	The real path to the system sources, so that 'make obj'
529		will work correctly.  [/usr/src]
530
531BSDOBJDIR	The real path to the system 'obj' tree, so that 'make obj'
532		will work correctly.  [/usr/obj]
533
534BINGRP		Binary group.  [wheel]
535
536BINOWN		Binary owner.  [root]
537
538BINMODE		Binary mode.  [555]
539
540NONBINMODE	Mode for non-executable files.  [444]
541
542MANDIR		Base path for manual installation.  [/usr/share/man/cat]
543
544MANGRP		Manual group.  [wheel]
545
546MANOWN		Manual owner.  [root]
547
548MANMODE		Manual mode.  [${NONBINMODE}]
549
550MANINSTALL	Manual installation type.  Space separated list:
551			catinstall, htmlinstall, maninstall
552		Default value derived from MKCATPAGES and MKHTML.
553
554LDSTATIC	Control program linking; if set blank, link everything
555		dynamically.  If set to "-static", link everything statically.
556		If not set, programs link according to their makefile.
557
558LIBDIR		Base path for library installation.  [/usr/lib]
559
560LINTLIBDIR	Base path for lint(1) library installation.  [/usr/libdata/lint]
561
562LIBGRP		Library group.  [${BINGRP}]
563
564LIBOWN		Library owner.  [${BINOWN}]
565
566LIBMODE		Library mode.  [${NONBINMODE}]
567
568DOCDIR		Base path for system documentation (e.g. PSD, USD, etc.)
569	        installation.  [/usr/share/doc]
570
571HTMLDOCDIR	Base path for html system documentation installation.
572		[/usr/share/doc/html]
573
574DOCGRP		Documentation group.  [wheel]
575
576DOCOWN		Documentation owner.  [root]
577
578DOCMODE		Documentation mode.  [${NONBINMODE}]
579
580NLSDIR		Base path for Native Language Support files installation.
581		[/usr/share/nls]
582
583NLSGRP		Native Language Support files group.  [wheel]
584
585NLSOWN		Native Language Support files owner.  [root]
586
587NLSMODE		Native Language Support files mode.  [${NONBINMODE}]
588
589X11SRCDIR	The path to the xsrc tree.  [${NETBSDSRCDIR}/../xsrc,
590		if that exists; otherwise /usr/xsrc]
591
592X11SRCDIR.xc	The path to the (old) X11 xc src tree.  [${X11SRCDIR}/xfree/xc]
593
594X11SRCDIR.local	The path to the local X11 src tree.  [${X11SRCDIR}/local]
595
596X11SRCDIR.lib<package>
597X11SRCDIR.<package>
598		The path to the xorg src tree for the specificed package>.
599		[${X11SRCDIR}/external/mit/xorg/<package>/dist]
600
601X11ROOTDIR	Root directory of the X11 installation.  [/usr/X11R6 or
602		[/usr/X11R7]
603
604X11BINDIR	X11 bin directory.  [${X11ROOTDIR}/bin]
605
606X11FONTDIR	X11 font directory.  [${X11ROOTDIR}/lib/X11/fonts]
607
608X11INCDIR	X11 include directory.  [${X11ROOTDIR}/include]
609
610X11LIBDIR	X11 lib/x11 (config) directory.  [${X11ROOTDIR}/lib/X11]
611
612X11MANDIR	X11 manual directory.  [${X11ROOTDIR}/man]
613
614X11USRLIBDIR	X11 library directory.  [${X11ROOTDIR}/lib]
615
616STRIPFLAG	The flag passed to the install program to cause the binary
617		to be stripped.  This is to be used when building your
618		own install script so that the entire system can be made
619		stripped/not-stripped using a single knob.  []
620
621COPY		The flag passed to the install program to cause the binary
622		to be copied rather than moved.  This is to be used when
623		building our own install script so that the entire system
624		can either be installed with copies, or with moves using
625		a single knob.  [-c]
626
627MAKEDIRTARGET dir target [params]
628		Runs "cd $${dir} && ${MAKE} [params] $${target}",
629		displaying a "pretty" message whilst doing so.
630
631RELEASEMACHINEDIR
632		Subdirectory used below RELEASEDIR when building
633		a release.  [${MACHINE}]
634
635RELEASEMACHINE	Subdirectory or path component used for the following
636		paths:
637			distrib/${RELEASEMACHINE}
638			distrib/notes/${RELEASEMACHINE}
639			etc/etc.${RELEASEMACHINE}
640		Used when building a release.  [${MACHINE}]
641
642Additionally, the following variables may be set by <bsd.own.mk> or in a
643make configuration file to modify the behavior of the system build
644process (default values are in brackets along with comments, if set by
645<bsd.own.mk>):
646
647USETOOLS	Indicates whether the tools specified by ${TOOLDIR} should
648		be used as part of a build in progress.
649		Supported values:
650
651		yes	Use the tools from TOOLDIR.
652			Must be set to this if cross-compiling.
653
654		no	Do not use the tools from TOOLDIR, but refuse to
655			build native compilation tool components that are
656			version-specific for that tool.
657
658		never	Do not use the tools from TOOLDIR, even when
659			building native tool components.  This is similar to
660			the traditional NetBSD build method, but does not
661			verify that the compilation tools in use are
662			up-to-date enough in order to build the tree
663			successfully.  This may cause build or runtime
664			problems when building the whole NetBSD source tree.
665
666		Default: "yes" if building all or part of a whole NetBSD
667		source tree (detected automatically); "no" otherwise
668		(to preserve traditional semantics of the <bsd.*.mk>
669		make(1) include files).
670
671OBJECT_FMT	Object file format.  [set to "ELF" on architectures that
672		use ELF -- currently all architectures].
673
674TOOLCHAIN_MISSING
675		If not "no", this indicates that the platform being built
676		does not have a working in-tree toolchain.  If the
677		${MACHINE_ARCH} in question falls into this category,
678		TOOLCHAIN_MISSING is conditionally assigned the value "yes".
679		Otherwise, the variable is unconditionally assigned the
680		value "no".
681		If not "no", ${MKBINUTILS}, ${MKGCC}, and ${MKGDB} are
682		unconditionally assigned the value "no".
683
684EXTERNAL_TOOLCHAIN
685		This variable is not directly set by <bsd.own.mk>, but
686		including <bsd.own.mk> is the canonical way to gain
687		access to this variable.  The variable should be defined
688		either in the user's environment or in the user's mk.conf
689		file.  If defined, this variable indicates the root of
690		an external toolchain which will be used to build the
691		tree.  For example, if a platform is a ${TOOLCHAIN_MISSING}
692		platform, EXTERNAL_TOOLCHAIN can be used to re-enable the
693		cross-compile framework.
694
695		If EXTERNAL_TOOLCHAIN is defined, ${MKGCC} is unconditionally
696		assigned the value "no", since the external version of the
697		compiler may not be able to build the library components of
698		the in-tree compiler.
699
700		NOTE: This variable is not yet used in as many places as
701		it should be.  Expect the exact semantics of this variable
702		to change in the short term as parts of the cross-compile
703		framework continue to be cleaned up.
704
705The following variables are defined to commands to perform the
706appropriate operation, with the default in [brackets].  Note that
707the defaults change if USETOOLS == "yes":
708
709TOOL_AMIGAAOUT2BB	aout to Amiga bootblock converter.  [amiga-aout2bb]
710
711TOOL_AMIGAELF2BB	ELF to Amiga bootblock converter.  [amiga-elf2bb]
712
713TOOL_AMIGATXLT		Amige assembly language format translator.  [amiga-txlt]
714
715TOOL_ASN1_COMPILE	ASN1 compiler.  [asn1_compile]
716
717TOOL_AWK		Pattern-directed scanning/processing language.  [awk]
718
719TOOL_CAP_MKDB		Create capability database.  [cap_mkdb]
720
721TOOL_CAT		Concatenate and print files.  [cat]
722
723TOOL_CKSUM		Display file checksums.  [cksum]
724
725TOOL_COMPILE_ET		Error table compiler.  [compile_et]
726
727TOOL_CONFIG		Build kernel compilation directories.  [config]
728
729TOOL_CRUNCHGEN		Generate crunched binary build environment.  [crunchgen]
730
731TOOL_CTAGS		Create a tags file.  [ctags]
732
733TOOL_DB			Manipulate db(3) databases.  [db]
734
735TOOL_DISKLABEL		Read and write disk pack label.  [disklabel]
736
737TOOL_EQN		Format equations for groff.  [eqn]
738
739TOOL_FDISK		MS-DOS partition maintenance program.  [fdisk]
740
741TOOL_FGEN		IEEE 1275 Open Firmware FCode Tokenizer.  [fgen]
742
743TOOL_GENASSYM		Generate constants for assembly files.  [genassym]
744
745TOOL_GENCAT		Generate NLS message catalogs.  [gencat]
746
747TOOL_GMAKE		GNU make utility.  [gmake]
748
749TOOL_GREP		Print lines matching a pattern.  [grep]
750
751TOOL_GROFF		Front end for groff document formatting system.  [groff]
752
753TOOL_HEXDUMP		Ascii, decimal, hexadecimal, octal dump.  [hexdump]
754
755TOOL_HP300MKBOOT	Make bootable image for hp300.  [hp300-mkboot]
756
757TOOL_HP700MKBOOT	Make bootable image for hp700.  [hp700-mkboot]
758
759TOOL_INDXBIB		Make bibliographic database's inverted index.  [indxbib]
760
761TOOL_INSTALLBOOT	Install disk bootstrap software.  [installboot]
762
763TOOL_INSTALL_INFO	Update info/dir entries.  [install-info]
764
765TOOL_JOIN		Relational database operator.  [join]
766
767TOOL_M4			M4 macro language processor.  [m4]
768
769TOOL_MACPPCFIXCOFF	Fix up xcoff headers for macppc.  [macppc-fixcoff]
770
771TOOL_MAKEFS		Create file system image from directory tree.  [makefs]
772
773TOOL_MAKEINFO		Translate Texinfo documents.  [makeinfo]
774
775TOOL_MAKEWHATIS		Create a whatis.db database.  [makewhatis]
776
777TOOL_MDSETIMAGE		Set kernel RAM disk image.  [mdsetimage]
778
779TOOL_MENUC		Menu compiler.  [menuc]
780
781TOOL_MIPSELF2ECOFF	Convert ELF-format executable to ECOFF for mips.
782			[mips-elf2ecoff]
783
784TOOL_MKCSMAPPER		Make charset mapping table.  [mkcsmapper]
785
786TOOL_MKESDB		Make encoding scheme database.  [mkesdb]
787
788TOOL_MKLOCALE		Make LC_CTYPE locale files.  [mklocale]
789
790TOOL_MKMAGIC		Create database for file(1).  [file]
791
792TOOL_MKTEMP		Make (unique) temporary file name.  [mktemp]
793
794TOOL_MSGC		Simple message list compiler.  [msgc]
795
796TOOL_MTREE		Map a directory hierarchy.  [mtree]
797
798TOOL_PAX		Manipulate file archives and copy directories.  [pax]
799
800TOOL_PIC		Compile pictures for groff.  [pic]
801
802TOOL_PIGZ		Parallel compressor.  [pigz]
803
804TOOL_POWERPCMKBOOTIMAGE	Make bootable image for powerpc.  [powerpc-mkbootimage]
805
806TOOL_PWD_MKDB		Generate the password databases.  [pwd_mkdb]
807
808TOOL_REFER		Preprocess bibliographic references for groff.  [refer]
809
810TOOL_ROFF_ASCII		Generate ASCII groff output.  [nroff]
811
812TOOL_ROFF_DVI		Generate DVI groff output.  [${TOOL_GROFF} -Tdvi]
813
814TOOL_ROFF_HTML		Generate HTML groff output.
815			[${TOOL_GROFF} -Tlatin1 -mdoc2html]
816
817TOOL_ROFF_PS		Generate PS groff output.  [${TOOL_GROFF} -Tps]
818
819TOOL_ROFF_RAW		Generate "raw" groff output.  [${TOOL_GROFF} -Z]
820
821TOOL_RPCGEN		Remote Procedure Call (RPC) protocol compiler.  [rpcgen]
822
823TOOL_SED		Stream editor.  [sed]
824
825TOOL_SOELIM		Eliminate .so's from groff input.  [soelim]
826
827TOOL_SPARKCRC		Generate a crc suitable for use in a sparkive file.
828			[sparkcrc]
829
830TOOL_STAT		Display file status.  [stat]
831
832TOOL_STRFILE		Create a random access file for storing strings.
833			[strfile]
834
835TOOL_SUNLABEL		Read or modify a SunOS disk label.  [sunlabel]
836
837TOOL_TBL		Format tables for groff.  [tbl]
838
839TOOL_UUDECODE		Uudecode a binary file.  [uudecode]
840
841TOOL_VGRIND		Grind nice listings of programs.  [vgrind -f]
842
843TOOL_ZIC		Time zone compiler.  [zic]
844
845<bsd.own.mk> is generally useful when building your own Makefiles so that
846they use the same default owners etc. as the rest of the tree.
847
848
849=-=-=-=-=   bsd.clean.mk   =-=-=-=-=
850
851The include file <bsd.clean.mk> defines the clean and cleandir
852targets.  It uses the following variables:
853
854CLEANFILES	Files to remove for both the clean and cleandir targets.
855
856CLEANDIRFILES	Files to remove for the cleandir target, but not for
857		the clean target.
858
859MKCLEANSRC	Controls whether or not the clean and cleandir targets
860		will delete files from both the object directory,
861		${.OBJDIR}, and the source directory, ${.CURDIR}.
862
863		If MKCLEANSRC is set to "no", then the file names in
864		CLEANFILES or CLEANDIRFILES are interpreted relative
865		to the object directory, ${.OBJDIR}.  This is the
866		traditional behaviour.
867
868		If MKCLEANSRC is set to "yes", then the file deletion
869		is performed relative to both the object directory,
870		${.OBJDIR}, and the source directory, ${.CURDIR}.  (This
871		has no effect if ${.OBJDIR} is the same as ${.CURDIR}.)
872		Deleting files from ${.CURDIR} is intended to remove
873		stray output files that had been left in the source
874		directory by an earlier build that did not use object
875		directories.
876
877		The default is MKCLEANSRC=yes.  If you always build with
878		separate object directories, and you are sure that there
879		are no stray files in the source directories, then you
880		may set MKCLEANSRC=no to save some time.
881
882MKCLEANVERIFY	Controls whether or not the clean and cleandir targets
883		will verify that files have been deleted.
884
885		If MKCLEANVERIFY is set to "no", then the files will
886		be deleted using a "rm -f" command, and its success or
887		failure will be ignored.
888
889		If MKCLEANVERIFY is set to "yes", then the success of
890		the "rm -f" command will be verified using an "ls"
891		command.
892
893		The default is MKCLEANVERIFY=yes.  If you are sure that
894		there will be no problems caused by file permissions,
895		read-only file systems, or the like, then you may set
896		MKCLEANVERIFY=no to save some time.
897
898To use the clean and cleandir targets defined in <bsd.clean.mk>, other
899Makefiles or bsd.*.mk files should append file names to the CLEANFILES
900or CLEANDIRFILES variables.  For example:
901
902	    CLEANFILES+= a.out
903	    CLEANDIRFILES+= .depend
904
905	    .include <bsd.clean.mk>
906
907The files listed in CLEANFILES and CLEANDIRFILES must not be
908directories, because the potential risk from running "rm -rf" commands
909in bsd.clean.mk is considered too great.  If you want to recursively
910delete a directory as part of "make clean" or "make cleandir" then you
911need to provide your own target.
912
913=-=-=-=-=   bsd.dep.mk   =-=-=-=-=
914
915The include file <bsd.dep.mk> contains the default targets for building
916.depend files.  It creates .d files from entries in SRCS and DPSRCS
917that are C, C++, or Objective C source files, and builds .depend from the
918.d files.  All other files in SRCS and all of DPSRCS will be used as
919dependencies for the .d files.  In order for this to function correctly,
920it should be .included after all other .mk files and directives that may
921modify SRCS or DPSRCS.  It uses the following variables:
922
923SRCS		List of source files to build the program.
924
925DPSRCS		List of source files which are needed for generating
926		dependencies, but are not needed in ${SRCS}.
927
928
929=-=-=-=-=   bsd.files.mk   =-=-=-=-=
930
931The include file <bsd.files.mk> handles the FILES variables and is included
932from <bsd.lib.mk> and <bsd.prog.mk>, and uses the following variables:
933
934FILES		The list of files to install.
935
936CONFIGFILES	Similar semantics to FILES, except that the files
937		are installed by the `configinstall' target,
938		not the `install' target.
939		The FILES* variables documented below also apply.
940
941FILESOWN	File owner.  [${BINOWN}]
942
943FILESGRP	File group.  [${BINGRP}]
944
945FILESMODE	File mode.  [${NONBINMODE}]
946
947FILESDIR	The location to install the files.
948
949FILESNAME	Optional name to install each file as.
950
951FILESOWN_<fn>	File owner of the specific file <fn>.
952
953FILESGRP_<fn>	File group of the specific file <fn>.
954
955FILESMODE_<fn>	File mode of the specific file <fn>.
956
957FILESDIR_<fn>	The location to install the specific file <fn>.
958
959FILESNAME_<fn>	Optional name to install <fn> as.
960
961FILESBUILD	If this variable is defined, then its value will be
962		used as the default for all FILESBUILD_<fn> variables.
963		Otherwise, the default will be "no".
964
965FILESBUILD_<fn>	A value different from "no" will add the file to the list of
966		targets to be built by `realall'.  Users of that variable
967		should provide a target to build the file.
968
969
970BUILDSYMLINKS	List of two word items:
971			lnsrc lntgt
972		For each lnsrc item, create a symlink named lntgt.
973		The lntgt symlinks are removed by the cleandir target.
974
975UUDECODE_FILES	List of files which are stored as <file>.uue in the source
976		tree. Each one will be decoded with ${TOOL_UUDECODE}.
977		The source files have a `.uue' suffix, the generated files do
978		not.
979
980UUDECODE_FILES_RENAME_<fn>
981		Rename the output from the decode to the provided name.
982		
983		*NOTE: These files are simply decoded, with no install or other
984		       rule applying implicitly except being added to the clean
985		       target.
986
987=-=-=-=-=   bsd.gcc.mk   =-=-=-=-=
988
989The include file <bsd.gcc.mk> computes various parameters related to GCC
990support libraries.  It defines no targets.  <bsd.own.mk> MUST be included
991before <bsd.gcc.mk>.
992
993The primary users of <bsd.gcc.mk> are <bsd.prog.mk> and <bsd.lib.mk>, each
994of which need to know where to find certain GCC support libraries.
995
996The behavior of <bsd.gcc.mk> is influenced by the EXTERNAL_TOOLCHAIN variable,
997which is generally set by the user.  If EXTERNAL_TOOLCHAIN it set, then
998the compiler is asked where to find the support libraries, otherwise the
999support libraries are found in ${DESTDIR}/usr/lib.
1000
1001<bsd.gcc.mk> sets the following variables:
1002
1003_GCC_CRTBEGIN	The full path name to crtbegin.o.
1004
1005_GCC_CRTBEGINS	The full path name to crtbeginS.o.
1006
1007_GCC_CRTEND	The full path name to crtend.o.
1008
1009_GCC_CRTENDS	The full path name to crtendS.o.
1010
1011_GCC_LIBGCCDIR	The directory where libgcc.a is located.
1012
1013
1014=-=-=-=-=   bsd.inc.mk   =-=-=-=-=
1015
1016The include file <bsd.inc.mk> defines the includes target and uses the
1017variables:
1018
1019INCS		The list of include files.
1020
1021INCSDIR		The location to install the include files.
1022
1023INCSNAME	Target name of the include file, if only one; same as
1024		FILESNAME, but for include files.
1025
1026INCSYMLINKS	Similar to SYMLINKS in <bsd.links.mk>, except that these
1027		are installed in the 'includes' target and not the
1028		(much later) 'install' target.
1029
1030INCSNAME_<file>	The name file <file> should be installed as, if not <file>,
1031		same as FILESNAME_<file>, but for include files.
1032
1033
1034=-=-=-=-=   bsd.info.mk   =-=-=-=-=
1035
1036The include file <bsd.info.mk> is used to generate and install GNU Info
1037documentation from respective Texinfo source files.  It defines three
1038implicit targets (.txi.info, .texi.info, and .texinfo.info), and uses the
1039following variables:
1040
1041TEXINFO		List of Texinfo source files.  Info documentation will
1042		consist of single files with the extension replaced by
1043		.info.
1044
1045INFOFLAGS	Flags to pass to makeinfo.  []
1046
1047
1048=-=-=-=-=   bsd.kernobj.mk   =-=-=-=-=
1049
1050The include file <bsd.kernobj.mk> defines variables related to the
1051location of kernel sources and object directories.
1052
1053KERNSRCDIR	Is the location of the top of the kernel src.
1054		[${_SRC_TOP_}/sys]
1055
1056KERNARCHDIR	Is the location of the machine dependent kernel sources.
1057		[arch/${MACHINE}]
1058
1059KERNCONFDIR	Is where the configuration files for kernels are found.
1060		[${KERNSRCDIR}/${KERNARCHDIR}/conf]
1061
1062KERNOBJDIR	Is the kernel build directory.  The kernel GENERIC for
1063		instance will be compiled in ${KERNOBJDIR}/GENERIC.
1064		The default value is
1065		${MAKEOBJDIRPREFIX}${KERNSRCDIR}/${KERNARCHDIR}/compile
1066		if it exists or the target 'obj' is being made.
1067		Otherwise the default is
1068		${KERNSRCDIR}/${KERNARCHDIR}/compile.
1069
1070It is important that Makefiles (such as those under src/distrib) that
1071wish to find compiled kernels use <bsd.kernobj.mk> and ${KERNOBJDIR}
1072rather than make assumptions about the location of the compiled kernel.
1073
1074
1075=-=-=-=-=   bsd.kinc.mk   =-=-=-=-=
1076
1077The include file <bsd.kinc.mk> defines the many targets (includes,
1078subdirectories, etc.), and is used by kernel makefiles to handle
1079include file installation.  It is intended to be included alone, by
1080kernel Makefiles.  It uses similar variables to <bsd.inc.mk>.
1081Please see <bsd.kinc.mk> for more details, and keep the documentation
1082in that file up to date.
1083
1084
1085=-=-=-=-=   bsd.lib.mk   =-=-=-=-=
1086
1087The include file <bsd.lib.mk> has support for building libraries.  It has
1088the same eight targets as <bsd.prog.mk>: all, clean, cleandir, depend,
1089includes, install, lint, and tags.  Additionally, it has a checkver target
1090which checks for installed shared object libraries whose version is greater
1091that the version of the source. It has a limited number of suffixes,
1092consistent with the current needs of the BSD tree.  <bsd.lib.mk> includes
1093<bsd.shlib.mk> to get shared library parameters.
1094
1095It sets/uses the following variables:
1096
1097LIB		The name of the library to build.
1098
1099LIBDIR		Target directory for libraries.
1100
1101MKARZERO	Normally, ar(1) sets the timestamps, uid, gid and
1102		permissions in files inside its archives to those of
1103		the file it was fed. This leads to non-reproduceable
1104		builds. If MKARZERO is set to "yes" (default is "no")
1105		then the "D" flag is passed to ar, causing the
1106		timestamp, uid and gid to be zeroed and the file
1107		permissions to be set to 644. This allows .a files
1108		from different builds to be bit identical.
1109
1110SHLIBINSTALLDIR	Target directory for shared libraries if ${USE_SHLIBDIR}
1111		is not "no".
1112
1113SHLIB_MAJOR
1114SHLIB_MINOR
1115SHLIB_TEENY	Major, minor, and teeny version numbers of shared library
1116
1117USE_SHLIBDIR	If not "no", use ${SHLIBINSTALLDIR} instead of ${LIBDIR}
1118		as the path to install shared libraries to.
1119		USE_SHLIBDIR must be defined before <bsd.own.mk> is included.
1120		Default: no
1121
1122LIBISMODULE	If not "no", install as ${LIB}.so (without the "lib" prefix),
1123		and act as "MKDEBUGLIB=no MKLINT=no MKPICINSTALL=no
1124		MKPROFILE=no MKSTATICLIB=no".
1125		Default: no
1126
1127LIBISPRIVATE	If not "no", act as "MKDEBUGLIB=no MKLINT=no MKPIC=no
1128		MKPROFILE=no", and don't install the (.a) library.
1129		This is useful for "build only" helper libraries.
1130		Default: no
1131
1132LIBISCXX	If not "no", Use ${CXX} instead of ${CC} to link
1133		shared libraries.
1134		This is useful for C++ libraries.
1135		Default: no
1136
1137LINTLIBDIR	Target directory for lint libraries.
1138
1139LIBGRP		Library group.
1140
1141LIBOWN		Library owner.
1142
1143LIBMODE		Library mode.
1144
1145LDADD		Additional loader objects.
1146
1147MAN		The manual pages to be installed (use a .1 - .9 suffix).
1148
1149NOCHECKVER_<library>
1150NOCHECKVER	If set, disables checking for installed shared object
1151		libraries with versions greater than the source.  A
1152		particular library name, without the "lib" prefix, may
1153		be appended to the variable name to disable the check for
1154		only that library.
1155
1156SRCS		List of source files to build the library.  Suffix types
1157		.s, .c, and .f are supported.  Note, .s files are preferred
1158		to .c files of the same name.  (This is not the default for
1159		versions of make.)
1160
1161LIBDPLIBS	A list of the tuples:
1162			libname  path-to-srcdir-of-libname
1163
1164		For each tuple;
1165		     *	LIBDO.libname contains the .OBJDIR of the library
1166			`libname', and if it is not set it is determined
1167			from the srcdir and added to MAKEOVERRIDES (the
1168			latter is to allow for build time optimization).
1169		     *	LDADD gets  -L${LIBDO.libname} -llibname    added.
1170		     *	DPADD gets  ${LIBDO.libname}/liblibname.so  or
1171				    ${LIBDO.libname}/liblibname.a   added.
1172
1173		The special value "_external" for LIBDO.lib makes the
1174		build system to assume the library comes from outside
1175		of the NetBSD source tree and only causes -llibname
1176		to be added to LDADD.
1177
1178		This variable may be used for individual libraries, as
1179		well as in parent directories to cache common libraries
1180		as a build-time optimization.
1181
1182The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
1183if it exists, as well as the include file <bsd.man.mk>.
1184
1185It has rules for building profiled objects; profiled libraries are
1186built by default.
1187
1188Libraries are ranlib'd when made.
1189
1190
1191=-=-=-=-=   bsd.links.mk   =-=-=-=-=
1192
1193The include file <bsd.links.mk> handles the LINKS and SYMLINKS variables
1194and is included from from <bsd.lib.mk> and <bsd.prog.mk>.
1195
1196LINKSOWN, LINKSGRP, and LINKSMODE, are relevant only if a metadata log
1197is used. The defaults may be modified by other bsd.*.mk files which
1198include bsd.links.mk.  In the future, these variables may be replaced
1199by a method for explicitly recording hard links in a metadata log.
1200
1201LINKS		The list of hard links, consisting of pairs of paths:
1202			source-file target-file
1203		${DESTDIR} is prepended to both paths before linking.
1204		For example, to link /bin/test and /bin/[, use:
1205			LINKS=/bin/test /bin/[
1206
1207CONFIGLINKS	Similar semantics to LINKS, except that the links
1208		are installed by the `configinstall' target,
1209		not the `install' target.
1210
1211SYMLINKS	The list of symbolic links, consisting of pairs of paths:
1212			source-file target-file
1213		${DESTDIR} is only prepended to target-file before linking.
1214		For example, to symlink /usr/bin/tar to /bin/tar resulting
1215		in ${DESTDIR}/usr/bin/tar -> /bin/tar:
1216			SYMLINKS=/bin/tar /usr/bin/tar
1217
1218CONFIGSYMLINKS	Similar semantics to SYMLINKS, except that the symbolic links
1219		are installed by the `configinstall' target,
1220		not the `install' target.
1221
1222LINKSOWN	Link owner.  [${BINOWN}]
1223
1224LINKSGRP	Link group.  [${BINGRP}]
1225
1226LINKSMODE	Link mode.  [${NONBINMODE}]
1227
1228LINKSOWN_<fn>	Link owner of the specific file <fn>.
1229
1230LINKSGRP_<fn>	Link group of the specific file <fn>.
1231
1232LINKSMODE_<fn>	Link mode of the specific file <fn>.
1233
1234
1235=-=-=-=-=   bsd.man.mk   =-=-=-=-=
1236
1237The include file <bsd.man.mk> handles installing manual pages and their
1238links.
1239
1240It has a three targets:
1241
1242	catinstall:
1243		Install the preformatted manual pages and their links.
1244	htmlinstall:
1245		Install the HTML manual pages and their links.
1246	maninstall:
1247		Install the manual page sources and their links.
1248
1249It sets/uses the following variables:
1250
1251MANDIR		Base path for manual installation.
1252
1253MANGRP		Manual group.
1254
1255MANOWN		Manual owner.
1256
1257MANMODE		Manual mode.
1258
1259MANSUBDIR	Subdirectory under the manual page section, i.e. "/vax"
1260		or "/tahoe" for machine specific manual pages.
1261
1262MAN		The manual pages to be installed (use a .1 - .9 suffix).
1263
1264MLINKS		List of manual page links (using a .1 - .9 suffix).  The
1265		linked-to file must come first, the linked file second,
1266		and there may be multiple pairs.
1267
1268The include file <bsd.man.mk> includes a file named "../Makefile.inc" if
1269it exists.
1270
1271
1272=-=-=-=-=   bsd.obj.mk   =-=-=-=-=
1273
1274The include file <bsd.obj.mk> defines targets related to the creation
1275and use of separated object and source directories.
1276
1277If an environment variable named MAKEOBJDIRPREFIX is set, make(1) uses
1278${MAKEOBJDIRPREFIX}${.CURDIR} as the name of the object directory if
1279it exists.  Otherwise make(1) looks for the existence of a
1280subdirectory (or a symlink to a directory) of the source directory
1281into which built targets should be placed.  If an environment variable
1282named MAKEOBJDIR is set, make(1) uses its value as the name of the
1283object directory; failing that, make first looks for a subdirectory
1284named "obj.${MACHINE}", and if that doesn't exist, it looks for "obj".
1285
1286Object directories are not created automatically by make(1) if they
1287don't exist; you need to run a separate "make obj".  (This will happen
1288during a top-level build if "MKOBJDIRS" is set to a value other than
1289"no").  When the source directory is a subdirectory of ${BSDSRCDIR} --
1290and this is determined by a simple string prefix comparison -- object
1291directories are created in a separate object directory tree, and a
1292symlink to the object directory in that tree is created in the source
1293directory; otherwise, "make obj" assumes that you're not in the main
1294source tree and that it's not safe to use a separate object tree.
1295
1296Several variables used by <bsd.obj.mk> control exactly what
1297directories and links get created during a "make obj":
1298
1299MAKEOBJDIR	If set, this is the component name of the object
1300		directory.
1301
1302OBJMACHINE	If this is set but MAKEOBJDIR is not set, creates
1303		object directories or links named "obj.${MACHINE}";
1304		otherwise, just creates ones named "obj".
1305
1306USR_OBJMACHINE  If set, and the current directory is a subdirectory of
1307		${BSDSRCDIR}, create object directory in the
1308		corresponding subdirectory of ${BSDOBJDIR}.${MACHINE};
1309		otherwise, create it in the corresponding subdirectory
1310		of ${BSDOBJDIR}
1311
1312BUILDID		If set, the contents of this variable are appended
1313		to the object directory name.  If OBJMACHINE is also
1314		set, ".${BUILDID}" is added after ".${MACHINE}".
1315
1316
1317=-=-=-=-=   bsd.prog.mk   =-=-=-=-=
1318
1319The include file <bsd.prog.mk> handles building programs from one or
1320more source files, along with their manual pages.  It has a limited number
1321of suffixes, consistent with the current needs of the BSD tree.
1322<bsd.prog.mk> includes <bsd.shlib.mk> to get shared library parameters.
1323
1324It has eight targets:
1325
1326	all:
1327		build the program and its manual page.  This also
1328		creates a GDB initialization file (.gdbinit) in
1329		the objdir.  The .gdbinit file sets the shared library
1330		prefix to ${DESTDIR} to facilitate cross-debugging.
1331	clean:
1332		remove the program, any object files and the files a.out,
1333		Errs, errs, mklog, and ${PROG}.core.
1334	cleandir:
1335		remove all of the files removed by the target clean, as
1336		well as .depend, tags, and any manual pages.
1337		`distclean' is a synonym for `cleandir'.
1338	depend:
1339		make the dependencies for the source files, and store
1340		them in the file .depend.
1341	includes:
1342		install any header files.
1343	install:
1344		install the program and its manual pages; if the Makefile
1345		does not itself define the target install, the targets
1346		beforeinstall and afterinstall may also be used to cause
1347		actions immediately before and after the install target
1348		is executed.
1349	lint:
1350		run lint on the source files
1351	tags:
1352		create a tags file for the source files.
1353
1354It sets/uses the following variables:
1355
1356BINGRP		Binary group.
1357
1358BINOWN		Binary owner.
1359
1360BINMODE		Binary mode.
1361
1362CLEANDIRFILES	Additional files to remove for the cleandir target.
1363
1364CLEANFILES	Additional files to remove for the clean and cleandir targets.
1365
1366COPTS		Additional flags to the compiler when creating C objects.
1367
1368COPTS.<fn>	Additional flags to the compiler when creating the
1369		C objects for <fn>.
1370		For <fn>.[ly], "<fn>.c" must be used.
1371
1372CPUFLAGS	Additional flags to the compiler/assembler to select
1373		CPU instruction set options, CPU tuning options, etc.
1374
1375CPUFLAGS.<fn>	Additional flags to the compiler/assembler for <fn>.
1376		For <fn>.[ly], "<fn>.c" must be used.
1377
1378CPPFLAGS	Additional flags to the C pre-processor.
1379
1380CPPFLAGS.<fn>	Additional flags to the C pre-processor for <fn>.
1381		For <fn>.[ly], "<fn>.c" must be used.
1382
1383GDBINIT		List of GDB initialization files to add to "source"
1384		directives in the .gdbinit file that is created in the
1385		objdir.
1386
1387LDADD		Additional loader objects.  Usually used for libraries.
1388		For example, to load with the compatibility and utility
1389		libraries, use:
1390
1391			LDADD+=-lutil -lcompat
1392
1393LDFLAGS		Additional linker flags (passed to ${CC} during link).
1394
1395LINKS		See <bsd.links.mk>
1396
1397OBJCOPTS	Additional flags to the compiler when creating ObjC objects.
1398
1399OBJCOPTS.<fn>	Additional flags to the compiler when creating the
1400		ObjC objects for <fn>.
1401		For <fn>.[ly], "<fn>.c" must be used.
1402
1403SYMLINKS	See <bsd.links.mk>
1404
1405MAN		Manual pages (should end in .1 - .9).  If no MAN variable is
1406		defined, "MAN=${PROG}.1" is assumed.
1407
1408PAXCTL_FLAGS	If defined, run paxctl(1) on the program binary after link
1409		time, with the value of this variable as args to paxctl(1).
1410
1411PAXCTL_FLAGS.${PROG} Custom override for PAXCTL_FLAGS.
1412
1413PROG		The name of the program to build.  If not supplied, nothing
1414		is built.
1415
1416PROG_CXX	If defined, the name of the program to build.  Also
1417		causes <bsd.prog.mk> to link the program with the C++
1418		compiler rather than the C compiler.  PROG_CXX overrides
1419		the value of PROG if PROG is also set.
1420
1421PROGNAME	The name that the above program will be installed as, if
1422		different from ${PROG}.
1423
1424SRCS		List of source files to build the program.  If SRCS is not
1425		defined, it's assumed to be ${PROG}.c.
1426
1427DPSRCS		List of source files which are needed for generating
1428		dependencies, but are not needed in ${SRCS}.
1429
1430DPADD		Additional dependencies for the program.  Usually used for
1431		libraries.  For example, to depend on the compatibility and
1432		utility libraries use:
1433
1434			DPADD+=${LIBCOMPAT} ${LIBUTIL}
1435
1436		The following system libraries are predefined for DPADD:
1437
1438		LIBARCHIVE?=	${DESTDIR}/usr/lib/libarchive.a
1439		LIBASN1?=	${DESTDIR}/usr/lib/libasn1.a
1440		LIBATF_C?=	${DESTDIR}/usr/lib/libatf-c.a
1441		LIBATF_CXX?=	${DESTDIR}/usr/lib/libatf-c++.a
1442		LIBBIND9?=	${DESTDIR}/usr/lib/libbind9.a
1443		LIBBLUETOOTH?=	${DESTDIR}/usr/lib/libbluetooth.a
1444		LIBBSDMALLOC?=	${DESTDIR}/usr/lib/libbsdmalloc.a
1445		LIBBZ2?=	${DESTDIR}/usr/lib/libbz2.a
1446		LIBC?=		${DESTDIR}/usr/lib/libc.a
1447		LIBCOMPAT?=	${DESTDIR}/usr/lib/libcompat.a
1448		LIBCOM_ERR?=	${DESTDIR}/usr/lib/libcom_err.a
1449		LIBCRT0?=	${DESTDIR}/usr/lib/crt0.o
1450		LIBCRYPT?=	${DESTDIR}/usr/lib/libcrypt.a
1451		LIBCRYPTO?=	${DESTDIR}/usr/lib/libcrypto.a
1452		LIBCRYPTO_IDEA?=${DESTDIR}/usr/lib/libcrypto_idea.a
1453		LIBCRYPTO_MDC2?=${DESTDIR}/usr/lib/libcrypto_mdc2.a
1454		LIBCRYPTO_RC5?=	${DESTDIR}/usr/lib/libcrypto_rc5.a
1455		LIBCURSES?=	${DESTDIR}/usr/lib/libcurses.a
1456		LIBC_PIC?=	${DESTDIR}/usr/lib/libc_pic.a
1457		LIBDBM?=	${DESTDIR}/usr/lib/libdbm.a
1458		LIBDES?=	${DESTDIR}/usr/lib/libdes.a
1459		LIBDNS?=	${DESTDIR}/usr/lib/libdns.a
1460		LIBEDIT?=	${DESTDIR}/usr/lib/libedit.a
1461		LIBEVENT?=	${DESTDIR}/usr/lib/libevent.a
1462		LIBEXPAT?=	${DESTDIR}/usr/lib/libexpat.a
1463		LIBFETCH?=	${DESTDIR}/usr/lib/libfetch.a
1464		LIBFORM?=	${DESTDIR}/usr/lib/libform.a
1465		LIBFL?=		${DESTDIR}/usr/lib/libfl.a
1466		LIBG2C?=	${DESTDIR}/usr/lib/libg2c.a
1467		LIBGCC?=	${DESTDIR}/usr/lib/libgcc.a
1468		LIBGNUMALLOC?=	${DESTDIR}/usr/lib/libgnumalloc.a
1469		LIBGSSAPI?=	${DESTDIR}/usr/lib/libgssapi.a
1470		LIBHDB?=	${DESTDIR}/usr/lib/libhdb.a
1471		LIBHEIMBASE?=	${DESTDIR}/usr/lib/libheimbase.a
1472		LIBHEIMNTLM?=	${DESTDIR}/usr/lib/libheimntlm.a
1473		LIBHX500?=	${DESTDIR}/usr/lib/libhx500.a
1474		LIBINTL?=	${DESTDIR}/usr/lib/libintl.a
1475		LIBIPSEC?=	${DESTDIR}/usr/lib/libipsec.a
1476		LIBISC?=	${DESTDIR}/usr/lib/libisc.a
1477		LIBISCCC?=	${DESTDIR}/usr/lib/libisccc.a
1478		LIBISCFG?=	${DESTDIR}/usr/lib/libiscfg.a
1479		LIBKADM5CLNT?=	${DESTDIR}/usr/lib/libkadm5clnt.a
1480		LIBKADM5SRV?=	${DESTDIR}/usr/lib/libkadm5srv.a
1481		LIBKAFS?=	${DESTDIR}/usr/lib/libkafs.a
1482		LIBKRB5?=	${DESTDIR}/usr/lib/libkrb5.a
1483		LIBKVM?=	${DESTDIR}/usr/lib/libkvm.a
1484		LIBL?=		${DESTDIR}/usr/lib/libl.a
1485		LIBLBER?=	${DESTDIR}/usr/lib/liblber.a
1486		LIBLDAP?=	${DESTDIR}/usr/lib/libldap.a
1487		LIBLDAP_R?=	${DESTDIR}/usr/lib/libldap_r.a
1488		LIBLUA?=	${DESTDIR}/usr/lib/liblua.a
1489		LIBLWRES?=	${DESTDIR}/usr/lib/liblwres.a
1490		LIBM?=		${DESTDIR}/usr/lib/libm.a
1491		LIBMAGIC?=	${DESTDIR}/usr/lib/libmagic.a
1492		LIBMENU?=	${DESTDIR}/usr/lib/libmenu.a
1493		LIBOBJC?=	${DESTDIR}/usr/lib/libobjc.a
1494		LIBOSSAUDIO?=	${DESTDIR}/usr/lib/libossaudio.a
1495		LIBPAM?=	${DESTDIR}/usr/lib/libpam.a
1496		LIBPCAP?=	${DESTDIR}/usr/lib/libpcap.a
1497		LIBPCI?=	${DESTDIR}/usr/lib/libpci.a
1498		LIBPMC?=	${DESTDIR}/usr/lib/libpmc.a
1499		LIBPOSIX?=	${DESTDIR}/usr/lib/libposix.a
1500		LIBPTHREAD?=	${DESTDIR}/usr/lib/libpthread.a
1501		LIBPTHREAD_DBG?=${DESTDIR}/usr/lib/libpthread_dbg.a
1502		LIBPUFFS?=	${DESTDIR}/usr/lib/libpuffs.a
1503		LIBQUOTA?=	${DESTDIR}/usr/lib/libquota.a
1504		LIBRADIUS?=	${DESTDIR}/usr/lib/libradius.a
1505		LIBRESOLV?=	${DESTDIR}/usr/lib/libresolv.a
1506		LIBRMT?=	${DESTDIR}/usr/lib/librmt.a
1507		LIBROKEN?=	${DESTDIR}/usr/lib/libroken.a
1508		LIBRPCSVC?=	${DESTDIR}/usr/lib/librpcsvc.a
1509		LIBRT?=		${DESTDIR}/usr/lib/librt.a
1510		LIBRUMP?=	${DESTDIR}/usr/lib/librump.a
1511		LIBRUMPFS_CD9660FS?=${DESTDIR}/usr/lib/librumpfs_cd9660fs.a
1512		LIBRUMPFS_EFS?=	${DESTDIR}/usr/lib/librumpfs_efs.a
1513		LIBRUMPFS_EXT2FS?=${DESTDIR}/usr/lib/librumpfs_ext2fs.a
1514		LIBRUMPFS_FFS?=	${DESTDIR}/usr/lib/librumpfs_ffs.a
1515		LIBRUMPFS_HFS?=	${DESTDIR}/usr/lib/librumpfs_hfs.a
1516		LIBRUMPFS_LFS?=	${DESTDIR}/usr/lib/librumpfs_lfs.a
1517		LIBRUMPFS_MSDOSFS?=${DESTDIR}/usr/lib/librumpfs_msdosfs.a
1518		LIBRUMPFS_NFS?=	${DESTDIR}/usr/lib/librumpfs_nfs.a
1519		LIBRUMPFS_NTFS?=${DESTDIR}/usr/lib/librumpfs_ntfs.a
1520		LIBRUMPFS_SYSPUFFS?=${DESTDIR}/usr/lib/librumpfs_syspuffs.a
1521		LIBRUMPFS_TMPFS?=${DESTDIR}/usr/lib/librumpfs_tmpfs.a
1522		LIBRUMPFS_UDF?=	${DESTDIR}/usr/lib/librumpfs_udf.a
1523		LIBRUMPFS_UFS?=	${DESTDIR}/usr/lib/librumpfs_ufs.a
1524		LIBRUMPUSER?=	${DESTDIR}/usr/lib/librumpuser.a
1525		LIBSASLC?=	${DESTDIR}/usr/lib/libsaslc.a
1526		LIBSKEY?=	${DESTDIR}/usr/lib/libskey.a
1527		LIBSL?=		${DESTDIR}/usr/lib/libsl.a
1528		LIBSQLITE3?=	${DESTDIR}/usr/lib/libsqlite3.a
1529		LIBSS?=		${DESTDIR}/usr/lib/libss.a
1530		LIBSSH?=	${DESTDIR}/usr/lib/libssh.a
1531		LIBSSL?=	${DESTDIR}/usr/lib/libssl.a
1532		LIBSSP?=	${DESTDIR}/usr/lib/libssp.a
1533		LIBSTDCXX?=	${DESTDIR}/usr/lib/libstdc++.a
1534		LIBSUPCXX?=	${DESTDIR}/usr/lib/libsupc++.a
1535		LIBTERMINFO?=	${DESTDIR}/usr/lib/libterminfo.a
1536		LIBTRE?=	${DESTDIR}/usr/lib/libtre.a
1537		LIBUSBHID?=	${DESTDIR}/usr/lib/libusbhid.a
1538		LIBUTIL?=	${DESTDIR}/usr/lib/libutil.a
1539		LIBWIND?=	${DESTDIR}/usr/lib/libwind.a
1540		LIBWRAP?=	${DESTDIR}/usr/lib/libwrap.a
1541		LIBY?=		${DESTDIR}/usr/lib/liby.a
1542		LIBZ?=		${DESTDIR}/usr/lib/libz.a
1543
1544		The following X-Windows libraries are predefined for DPADD:
1545
1546		LIBFS?=		${DESTDIR}/usr/X11R7/lib/libFS.a
1547		LIBGL?=		${DESTDIR}/usr/X11R7/lib/libGL.a
1548		LIBGLU?=	${DESTDIR}/usr/X11R7/lib/libGLU.a
1549		LIBICE?=	${DESTDIR}/usr/X11R7/lib/libICE.a
1550		LIBSM?=		${DESTDIR}/usr/X11R7/lib/libSM.a
1551		LIBX11?=	${DESTDIR}/usr/X11R7/lib/libX11.a
1552		LIBXTRAP?=	${DESTDIR}/usr/X11R7/lib/libXTrap.a
1553		LIBXAU?=	${DESTDIR}/usr/X11R7/lib/libXau.a
1554		LIBXAW?=	${DESTDIR}/usr/X11R7/lib/libXaw.a
1555		LIBXDMCP?=	${DESTDIR}/usr/X11R7/lib/libXdmcp.a
1556		LIBXEXT?=	${DESTDIR}/usr/X11R7/lib/libXext.a
1557		LIBXFONT?=	${DESTDIR}/usr/X11R7/lib/libXfont.a
1558		LIBXFT?=	${DESTDIR}/usr/X11R7/lib/libXft.a
1559		LIBXI?=		${DESTDIR}/usr/X11R7/lib/libXi.a
1560		LIBXINERAMA?=	${DESTDIR}/usr/X11R7/lib/libXinerama.a
1561		LIBXMU?=	${DESTDIR}/usr/X11R7/lib/libXmu.a
1562		LIBXMUU?=	${DESTDIR}/usr/X11R7/lib/libXmuu.a
1563		LIBXPM?=	${DESTDIR}/usr/X11R7/lib/libXpm.a
1564		LIBXRANDR?=	${DESTDIR}/usr/X11R7/lib/libXrandr.a
1565		LIBXRENDER?=	${DESTDIR}/usr/X11R7/lib/libXrender.a
1566		LIBXSS?=	${DESTDIR}/usr/X11R7/lib/libXss.a
1567		LIBXT?=		${DESTDIR}/usr/X11R7/lib/libXt.a
1568		LIBXTST?=	${DESTDIR}/usr/X11R7/lib/libXtst.a
1569		LIBXV?=		${DESTDIR}/usr/X11R7/lib/libXv.a
1570		LIBXXF86DGA?=	${DESTDIR}/usr/X11R7/lib/libXxf86dga.a
1571		LIBXXF86MISC?=	${DESTDIR}/usr/X11R7/lib/libXxf86misc.a
1572		LIBXXF86VM?=	${DESTDIR}/usr/X11R7/lib/libXxf86vm.a
1573		LIBDPS?=	${DESTDIR}/usr/X11R7/lib/libdps.a
1574		LIBFNTSTUBS?=	${DESTDIR}/usr/X11R7/lib/libfntstubs.a
1575		LIBFONTCACHE?=	${DESTDIR}/usr/X11R7/lib/libfontcache.a
1576		LIBFONTCONFIG?=	${DESTDIR}/usr/X11R7/lib/libfontconfig.a
1577		LIBFONTENC?=	${DESTDIR}/usr/X11R7/lib/libfontenc.a
1578		LIBFREETYPE?=	${DESTDIR}/usr/X11R7/lib/libfreetype.a
1579		LIBLBXUTIL?=	${DESTDIR}/usr/X11R7/lib/liblbxutil.a
1580		LIBXKBFILE?=	${DESTDIR}/usr/X11R7/lib/libxkbfile.a
1581
1582SHAREDSTRINGS	If defined, a new .c.o rule is used that results in shared
1583		strings, using xstr(1). Note that this will not work with
1584		parallel makes.
1585
1586STRIPFLAG	The flag passed to the install program to cause the binary
1587		to be stripped.
1588
1589SUBDIR		A list of subdirectories that should be built as well.
1590		Each of the targets will execute the same target in the
1591		subdirectories.
1592
1593SCRIPTS		A list of interpreter scripts [file.{sh,csh,pl,awk,...}].
1594		These are installed exactly like programs.
1595
1596SCRIPTSDIR	The location to install the scripts.  Each script can be
1597		installed to a separate path by setting SCRIPTSDIR_<script>.
1598
1599SCRIPTSNAME	The name that the above program will be installed as, if
1600		different from ${SCRIPTS}. These can be further specialized
1601		by setting SCRIPTSNAME_<script>.
1602
1603FILES		See description of <bsd.files.mk>.
1604
1605SHLINKDIR	Target directory for shared linker.  See description of
1606		<bsd.own.mk> for additional information about this variable.
1607
1608The include file <bsd.prog.mk> includes the file named "../Makefile.inc"
1609if it exists, as well as the include file <bsd.man.mk>.
1610
1611Some simple examples:
1612
1613To build foo from foo.c with a manual page foo.1, use:
1614
1615	PROG=	foo
1616
1617	.include <bsd.prog.mk>
1618
1619To build foo from foo.c with a manual page foo.2, add the line:
1620
1621	MAN=	foo.2
1622
1623If foo does not have a manual page at all, add the line:
1624
1625	MKMAN=	no
1626
1627If foo has multiple source files, add the line:
1628
1629	SRCS=	a.c b.c c.c d.c
1630
1631
1632=-=-=-=-=   bsd.rpc.mk   =-=-=-=-=
1633
1634The include file <bsd.rpc.mk> contains a makefile fragment used to
1635construct source files built by rpcgen.
1636
1637The following macros may be defined in makefiles which include
1638<bsd.rpc.mk> in order to control which files get built and how they
1639are to be built:
1640
1641RPC_INCS:	construct .h file from .x file
1642RPC_XDRFILES:	construct _xdr.c from .x file
1643		(for marshalling/unmarshalling data types)
1644RPC_SVCFILES:	construct _svc.c from .x file
1645		(server-side stubs)
1646RPC_SVCFLAGS:	Additional flags passed to builds of RPC_SVCFILES.
1647
1648RPC_XDIR:	Directory containing .x/.h files
1649
1650
1651=-=-=-=-=   bsd.shlib.mk   =-=-=-=-=
1652
1653The include file <bsd.shlib.mk> computes parameters for shared library
1654installation and use.  It defines no targets.  <bsd.own.mk> MUST be
1655included before <bsd.shlib.mk>.
1656
1657<bsd.own.mk> sets the following variables, if they are not already defined
1658(defaults are in brackets):
1659
1660SHLIBINSTALLDIR	If ${USE_SHLIBDIR} is not "no", use ${SHLIBINSTALLDIR}
1661		instead of ${LIBDIR} as the base path for shared library
1662		installation.  [/lib]
1663
1664SHLIBDIR	The path to USE_SHLIBDIR shared libraries to use when building
1665		a program.  [/lib for programs in /bin and /sbin, /usr/lib
1666		for all others.]
1667
1668_LIBSODIR	Set to ${SHLIBINSTALLDIR} if ${USE_SHLIBDIR} is not "no",
1669		otherwise set to ${LIBDIR}
1670
1671SHLINKINSTALLDIR Base path for shared linker.  [/libexec]
1672
1673SHLINKDIR	Path to use for shared linker when building a program.
1674		[/libexec for programs in /bin and /sbin, /usr/libexec for
1675		all others.]
1676
1677
1678=-=-=-=-=   bsd.subdir.mk   =-=-=-=-=
1679
1680The include file <bsd.subdir.mk> contains the default targets for building
1681subdirectories.  It has the same eight targets as <bsd.prog.mk>: all,
1682clean, cleandir, depend, includes, install, lint, and tags.  It uses the
1683following variables:
1684
1685NOSUBDIR	If this variable is defined, then the SUBDIR variable
1686		will be ignored and subdirectories will not be processed.
1687
1688SUBDIR		For all of the directories listed in ${SUBDIR}, the
1689		specified directory will be visited and the target made.
1690
1691		As a special case, the use of a token .WAIT as an
1692		entry in SUBDIR acts as a synchronization barrier
1693		when multiple make jobs are run; subdirs before the
1694		.WAIT must complete before any subdirs after .WAIT are
1695		started.  See make(1) for some caveats on use of .WAIT
1696		and other special sources.
1697
1698
1699=-=-=-=-=   bsd.sys.mk   =-=-=-=-=
1700
1701The include file <bsd.sys.mk> is used by <bsd.prog.mk> and
1702<bsd.lib.mk>.  It contains overrides that are used when building
1703the NetBSD source tree.
1704
1705The following variables control how various files are compiled/built.
1706(Note that these may be overridden in <bsd.own.mk> if USETOOLS == "yes"):
1707
1708AR		Create, modify, and extract from archives.  [ar]
1709
1710ARFLAGS		Options to ${AR}.  [rl]
1711
1712AS		Assembler.  [as]
1713
1714AFLAGS		Options to ${CC} when compiling or linking .s or .S
1715		assembly source files.  []
1716
1717BUILDSEED	GCC uses random numbers when compiling C++ code.
1718		If this option is present, seed the random number
1719		generator based on the value, source file names and
1720		the output file name to make builds more deterministic.
1721		Additional information is available in the GCC
1722		documentation of -frandom-seed.
1723
1724CC		C compiler.  [cc]
1725
1726CFLAGS		Options to ${CC}.  [Usually -O or -O2]
1727
1728CPP		C Pre-Processor.  [cpp]
1729
1730CPPFLAGS	Options to ${CPP}.  []
1731
1732CPUFLAGS	Optimization flags for ${CC}.  []
1733
1734CXX		C++ compiler.  [c++]
1735
1736CXXFLAGS	Options to ${CXX}.  [${CFLAGS}]
1737
1738ELF2ECOFF	Convert ELF-format executable to ECOFF.  [elf2ecoff]
1739
1740FC		Fortran compiler.  [f77]
1741
1742FFLAGS		Options to {$FC}.  [-O]
1743
1744HOST_SH		Shell.	This must be an absolute path, because it may be
1745		substituted into "#!" lines in scripts.	 [/bin/sh]
1746
1747INSTALL		install(1) command.  [install]
1748
1749LEX		Lexical analyzer.  [lex]
1750
1751LFLAGS		Options to ${LEX}.  []
1752
1753LPREFIX		Symbol prefix for ${LEX} (see -P option in lex(1)) [yy]
1754
1755LD		Linker.  [ld]
1756
1757LDFLAGS		Options to ${CC} during the link process.  []
1758
1759LINT		C program verifier.  [lint]
1760
1761LINTFLAGS	Options to ${LINT}.  [-chapbxzFS]
1762
1763LORDER		List dependencies for object files.  [lorder]
1764
1765MAKE		make(1).  [make]
1766
1767MKDEP		Construct Makefile dependency list.  [mkdep]
1768
1769NM		List symbols from object files.  [nm]
1770
1771PC		Pascal compiler.  [pc]  (Not present)
1772
1773PFLAGS		Options to ${PC}.  []
1774
1775OBJC		Objective C compiler.  [${CC}]
1776
1777OBJCFLAGS	Options to ${OBJC}.  [${CFLAGS}]
1778
1779OBJCOPY		Copy and translate object files.  [objcopy]
1780
1781OBJCOPYLIBFLAGS	Flags to pass to objcopy when library objects are
1782		being built. [${.TARGET} =~ "*.po" ? -X : -x]
1783
1784OBJDUMP		Display information from object files.  [objdump]
1785
1786RANLIB		Generate index to archive.  [ranlib]
1787
1788SIZE		List section sizes and total size.  [size]
1789
1790STRIP		Discard symbols from object files.  [strip]
1791
1792TSORT		Topological sort of a directed graph.  [tsort -q]
1793
1794YACC		LALR(1) parser generator.  [yacc]
1795
1796YFLAGS		Options to ${YACC}.  []
1797
1798YHEADER		If defined, add "-d" to YFLAGS, and add dependencies
1799		from <file>.y to <file>.h and <file>.c, and add
1800		<foo>.h to CLEANFILES.
1801
1802YPREFIX		If defined, add "-p ${YPREFIX}" to YFLAGS.
1803
1804
1805Other variables of note (incomplete list):
1806
1807NOGCCERROR	If defined, prevents passing certain ${CFLAGS} to GCC
1808		that cause warnings to be fatal, such as:
1809			-Werror -Wa,--fatal-warnings
1810		(The latter being for as(1).)
1811
1812NOCLANGERROR	If defined and clang is used as C compiler, -Werror is not
1813		passed to it.
1814
1815WARNS		Crank up compiler warning options; the distinct levels are:
1816			WARNS=1
1817			WARNS=2
1818			WARNS=3
1819			WARNS=4
1820			WARNS=5
1821
1822=-=-=-=-=   bsd.x11.mk   =-=-=-=-=
1823
1824The include file <bsd.x11.mk> contains parameters and targets for
1825cross-building X11 from ${X11SRCDIR.xc} / ${X11MITSRCDIR.*}.
1826It should be included after the general Makefile contents but before
1827the include files such as <bsd.prog.mk> and <bsd.lib.mk>.
1828
1829It provides the following targets:
1830	.man.1 .man.3 .man.4 .man.5 .man.7:
1831		If ${MAN} or ${PROG} is set and ${MKMAN} != "no",
1832		these rules convert from X11's manual page source
1833		into an mdoc.old source file.
1834
1835It sets the following variables:
1836
1837BINDIR			Set to ${X11BINDIR}.
1838			To override, define after including <bsd.x11.mk>
1839
1840LIBDIR			Set to ${X11USRLIBDIR}.
1841			To override, define after including <bsd.x11.mk>
1842
1843MANDIR			Set to ${X11MANDIR}.
1844			To override, define after including <bsd.x11.mk>
1845
1846CPPFLAGS		Appended with definitions to include from
1847			${DESTDIR}${X11INCDIR}
1848
1849LDFLAGS			Appended with definitions to link from
1850			${DESTDIR}${X11USRLIBDIR}
1851
1852X11FLAGS.CONNECTION	Equivalent to X11's CONNECTION_FLAGS.
1853
1854X11FLAGS.EXTENSION	Equivalent to X11's EXT_DEFINES.
1855
1856X11FLAGS.LOADABLE	Equivalent to X11's LOADABLE.
1857
1858X11FLAGS.OS_DEFINES	Equivalent to X11's OS_DEFINES.
1859
1860X11FLAGS.SERVER		Equivalent to X11's ServerDefines.
1861
1862X11FLAGS.THREADLIB	Equivalent to X11's THREADS_DEFINES for libraries.
1863
1864X11FLAGS.THREADS	Equivalent to X11's THREADS_DEFINES.
1865
1866X11FLAGS.VERSION	cpp(1) definitions of OSMAJORVERSION and OSMINORVERSION.
1867
1868X11FLAGS.DIX		Equivalent to X11's DIX_DEFINES.
1869
1870X11TOOL_UNXCOMM		Commandline to convert `XCOMM' comments to `#'
1871
1872It uses the following variables:
1873
1874APPDEFS			List of app-default files to install.
1875
1876CPPSCRIPTS		List of files/scripts to run through cpp(1)
1877			and then ${X11TOOL_UNXCOMM}.  The source files
1878			have a `.cpp' suffix, the generated files do not.
1879
1880CPPSCRIPTFLAGS		Additional flags to cpp(1) when building CPPSCRIPTS.
1881
1882CPPSCRIPTFLAGS_<fn>	Additional flags to cpp(1) when building CPPSCRIPT <fn>.
1883
1884
1885=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
1886