xref: /freebsd/share/mk/bsd.README (revision 732a02b4e77866604a120a275c082bb6221bd2ff)
1#	@(#)bsd.README	8.2 (Berkeley) 4/2/94
2# $FreeBSD$
3
4This is the README file for the "include" files for the FreeBSD
5source tree.  The files are installed in /usr/share/mk, and are by
6convention, named with the suffix ".mk".  These files store several
7build options and should be handled with caution.
8
9Note, this file is not intended to replace reading through the .mk
10files for anything tricky.
11
12There are two main types of make include files.  One type is the generally
13usable make include files, such as bsd.prog.mk and bsd.lib.mk.  The other is
14the internal make include files, such as bsd.files.mk and bsd.man.mk, which
15can not/should not be used directly but are used by the other make include
16files.  In most cases it is only interesting to include bsd.prog.mk or
17bsd.lib.mk.
18
19bsd.arch.inc.mk		- includes arch-specific Makefile.$arch
20bsd.compat.mk		- definitions for building programs against compat ABIs
21bsd.compiler.mk		- defined based on current compiler
22bsd.confs.mk		- install of configuration files
23bsd.cpu.mk		- sets CPU/arch-related variables (included from sys.mk)
24bsd.crunchgen.mk	- building crunched binaries using crunchgen(1)
25bsd.dep.mk		- handle Makefile dependencies
26bsd.dirs.mk		- handle directory creation
27bsd.doc.mk		- building troff system documents
28bsd.endian.mk		- TARGET_ENDIAN=1234(little) or 4321 (big) for target
29bsd.files.mk		- install of general purpose files
30bsd.incs.mk		- install of include files
31bsd.info.mk		- building GNU Info hypertext system (deprecated)
32bsd.init.mk		- initialization for the make include files
33bsd.kmod.mk		- building loadable kernel modules
34bsd.lib.mk		- support for building libraries
35bsd.libnames.mk		- define library names
36bsd.links.mk		- install of links (sym/hard)
37bsd.man.mk		- install of manual pages and their links
38bsd.nls.mk		- build and install of NLS catalogs
39bsd.obj.mk		- creating 'obj' directories and cleaning up
40bsd.own.mk		- define common variables
41bsd.port.mk		- building ports
42bsd.port.post.mk	- building ports
43bsd.port.pre.mk		- building ports
44bsd.port.subdir.mk	- targets for building subdirectories for ports
45bsd.prog.mk		- building programs from source files
46bsd.progs.mk		- build multiple programs from sources
47bsd.snmpmod.mk		- building modules for the SNMP daemon bsnmpd
48bsd.subdir.mk		- targets for building subdirectories
49bsd.sys.mk		- common settings used for building FreeBSD sources
50bsd.test.mk		- building test programs from source files
51sys.mk			- default rules for all makes
52
53This file does not document bsd.port*.mk.  They are documented in ports(7).
54
55See also make(1), mkdep(1), style.Makefile(5) and `PMake - A
56Tutorial', located in /usr/share/doc/psd/12.make.
57
58=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
59
60Random things worth knowing about this document:
61
62If appropriate when documenting the variables the default value is
63indicated using square brackets e.g. [gzip].
64In some cases the default value depend on other values (e.g. system
65architecture).  In these cases the most common value is indicated.
66
67This document contains some simple examples of the usage of the BSD make
68include files.  For more examples look at the makefiles in the FreeBSD
69source tree.
70
71=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
72
73RANDOM THINGS WORTH KNOWING:
74
75The files are like C-style #include files, and pretty much behave like
76you'd expect.  The syntax is slightly different in that a single '.' is
77used instead of the hash mark, i.e. ".include <bsd.prog.mk>".
78
79One difference that will save you lots of debugging time is that inclusion
80of the file is normally done at the *end* of the Makefile.  The reason for
81this is because .mk files often modify variables and behavior based on the
82values of variables set in the Makefile.  To make this work, remember that
83the FIRST target found is the target that is used, i.e. if the Makefile has:
84
85	a:
86		echo a
87	a:
88		echo a number two
89
90the command "make a" will echo "a".  To make things confusing, the SECOND
91variable assignment is the overriding one, i.e. if the Makefile has:
92
93	a=	foo
94	a=	bar
95
96	b:
97		echo ${a}
98
99the command "make b" will echo "bar".  This is for compatibility with the
100way the V7 make behaved.
101
102It's fairly difficult to make the BSD .mk files work when you're building
103multiple programs in a single directory.  It's a lot easier to split up
104the programs than to deal with the problem.  Most of the agony comes from
105making the "obj" directory stuff work right, not because we switch to a new
106version of make.  So, don't get mad at us, figure out a better way to handle
107multiple architectures so we can quit using the symbolic link stuff.
108(Imake doesn't count.)
109
110The file .depend in the source directory is expected to contain dependencies
111for the source files.  This file is read automatically by make after reading
112the Makefile.
113
114The variable DESTDIR works as before.  It's not set anywhere but will change
115the tree where the file gets installed.
116
117The profiled libraries are no longer built in a different directory than
118the regular libraries.  A new suffix, ".po", is used to denote a profiled
119object, and ".pico" denotes a position-independent relocatable object.
120".nossppico" denotes a position-independent relocatable object without
121stack smashing protection.
122
123=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
124
125The following variables are common:
126
127AFLAGS.${SRC}
128		Flags dependent on source file name.
129AFLAGS.${TARGET}
130		Flags dependent on output file name.
131ACFLAGS.${SRC}
132		Flags dependent on source file name.
133ACFLAGS.${TARGET}
134		Flags dependent on output file name.
135CFLAGS.${SRC}
136		Flags dependent on source file name.
137CFLAGS.${TARGET}
138		Flags dependent on output file name.
139CFLAGS.${COMPILER_TYPE}
140		Flags dependent on compiler added to CFLAGS.
141CFLAGS.${MACHINE_ARCH}
142		Architectural flags added to CFLAGS.
143CFLAGS_NO_SIMD	Add this to CFLAGS for programs that don't want any SIMD
144		instructions generated. It is setup in bsd.cpu.mk to an
145		appropriate value for the compiler and target.
146CXXFLAGS.${COMPILER_TYPE}
147		Flags dependent on compiler added to CXXFLAGS.
148CXXFLAGS.${MACHINE_ARCH}
149		Architectural flags added to CXXFLAGS.
150CXXFLAGS.${SRC}
151		Flags dependent on source file name.
152CXXFLAGS.${TARGET}
153		Flags dependent on output file name.
154COMPILER_FEATURES
155		A list of features that the compiler supports. Zero or
156		more of:
157			c++11	Supports full C++ 11 standard.
158
159COMPILER_TYPE	Type of compiler, either clang or gcc, though other
160		values are possible. Don't assume != clang == gcc.
161
162COMPILER_VERSION
163		A numeric constant equal to:
164		     major * 10000 + minor * 100 + tiny
165		for the compiler's self-reported version.
166
167=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
168
169The include file <sys.mk> has the default rules for all makes, in the BSD
170environment or otherwise.  You probably don't want to touch this file.
171
172=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
173
174The include file <bsd.arch.inc.mk> includes other Makefiles for specific
175architectures, if they exist. It will include the first of the following
176files that it finds: Makefile.${MACHINE}, Makefile.${MACHINE_ARCH},
177Makefile.${MACHINE_CPUARCH}
178
179=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
180
181The include file <bsd.man.mk> handles installing manual pages and their
182links.
183
184It has three targets:
185
186	all-man:
187		build manual pages.
188	maninstall:
189		install the manual pages and their links.
190	manlint:
191		verify the validity of manual pages.
192
193It sets/uses the following variables:
194
195MAN		The manual pages to be installed (use a .1 - .9 suffix).
196
197MANDIR		Base path for manual installation.
198
199MANGRP		Manual group.
200
201MANMODE		Manual mode.
202
203MANOWN		Manual owner.
204
205MANSUBDIR	Subdirectory under the manual page section, i.e. "/vax"
206		or "/tahoe" for machine specific manual pages.
207
208MLINKS		List of manual page links (using a .1 - .9 suffix).  The
209		linked-to file must come first, the linked file second,
210		and there may be multiple pairs.  The files are hard-linked.
211
212The include file <bsd.man.mk> includes a file named "../Makefile.inc" if
213it exists.
214
215=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
216
217The include file <bsd.own.mk> contains the owners, groups, etc. for both
218manual pages and binaries.
219
220It has no targets.
221
222It sets/uses the following variables:
223
224BINGRP		Binary group.
225
226BINMODE		Binary mode.
227
228BINOWN		Binary owner.
229
230MANDIR		Base path for manual installation.
231
232MANGRP		Manual group.
233
234MANMODE		Manual mode.
235
236MANOWN		Manual owner.
237
238INSTALL_LINK	Command to install a hard link.
239
240INSTALL_SYMLINK	Command to install a symbolic link.
241
242INSTALL_RSYMLINK	Command to install a relative symbolic link.
243
244LINKOWN		Owner of hard links created by INSTALL_LINK.
245
246LINKGRP		Group of hard links created by INSTALL_LINK.
247
248LINKMODE	Mode of hard links created by INSTALL_LINK.
249
250SYMLINKOWN	Owner of hard links created by INSTALL_[R]SYMLINK.
251
252SYMLINKGRP	Group of hard links created by INSTALL_[R]SYMLINK.
253
254SYMLINKMODE	Mode of hard links created by INSTALL_[R]SYMLINK.
255
256This file is generally useful when building your own Makefiles so that
257they use the same default owners etc. as the rest of the tree.
258
259=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
260
261The include file <bsd.prog.mk> handles building programs from one or
262more source files, along with their manual pages.  It has a limited number
263of suffixes, consistent with the current needs of the BSD tree.
264
265It has seven targets:
266
267	all:
268		build the program and its manual page
269	clean:
270		remove the program and any object files.
271	cleandir:
272		remove all of the files removed by the target clean, as
273		well as .depend, tags, and any manual pages.
274	depend:
275		make the dependencies for the source files, and store
276		them in the file .depend.
277	install:
278		install the program and its manual pages; if the Makefile
279		does not itself define the target install, the targets
280		beforeinstall and afterinstall may also be used to cause
281		actions immediately before and after the install target
282		is executed.
283	tags:
284		create a tags file for the source files.
285
286It sets/uses the following variables:
287
288ACFLAGS		Flags to the compiler when preprocessing and
289		assembling .S files.
290
291AFLAGS		Flags to the assembler when assembling .s files.
292
293BINGRP		Binary group.
294
295BINMODE		Binary mode.
296
297BINOWN		Binary owner.
298
299CFLAGS		Flags to the compiler when creating C objects.
300
301CLEANDIRS	Additional files (CLEANFILES) and directories (CLEANDIRS) to
302CLEANFILES	remove during clean and cleandir targets.  "rm -rf" and
303		"rm -f" are used, respectively.
304
305DIRS		A list of variables referring to directories.  For example:
306
307			DIRS+=	FOO
308			FOO=	/usr/share/foo
309
310		Owner, Group, Mode and Flags are handled by FOO_OWN,
311		FOO_GRP, FOO_MODE and FOO_FLAGS, respectively.
312
313		This allows FILESDIR to be set to FOO, and the directory
314		will be created before the files are installed and the
315		dependencies will be set correctly.
316
317DPADD		Additional dependencies for the program.  Usually used for
318		libraries.  For example, to depend on the compatibility and
319		utility libraries use:
320
321			DPADD=${LIBCOMPAT} ${LIBUTIL}
322
323		There is a predefined identifier for each (non-profiled,
324		non-shared) library and object.  Library file names are
325		transformed to identifiers by removing the extension and
326		converting to upper case.
327
328		There are no special identifiers for profiled or shared
329		libraries or objects.  The identifiers for the standard
330		libraries are used in DPADD.  This works correctly iff all
331		the libraries are built at the same time.  Unfortunately,
332		it causes unnecessary relinks to shared libraries when
333		only the static libraries have changed.  Dependencies on
334		shared libraries should be only on the library version
335		numbers.
336
337FILES		A list of non-executable files.
338		The installation is controlled by the FILESNAME, FILESOWN,
339		FILESGRP, FILESMODE, FILESDIR variables that can be
340		further specialized by FILES<VAR>_<file>.
341
342LDADD		Additional loader objects.  Usually used for libraries.
343		For example, to load with the compatibility and utility
344		libraries, use:
345
346			LDADD=-lutil -lcompat
347
348LDADD.${TAREGT}
349		Loader objects dependent on output file name.
350
351LDFLAGS		Additional loader flags. Passed to the loader via CC,
352		since that's used to link programs as well, so loader
353		specific flags need to be prefixed with -Wl, to work.
354
355LDFLAGS.${TARGET}
356		Flags dependent on output file name.
357
358LIBADD		Additional libraries.  This is for base system libraries
359		and is only valid inside of the /usr/src tree.
360		Use LIBADD=name instead of LDADD=-lname.
361
362LIBADD.${TARGET}
363		Libraries dependent on output file name.
364
365LINKS		The list of binary links; should be full pathnames, the
366		linked-to file coming first, followed by the linked
367		file.  The files are hard-linked.  For example, to link
368		/bin/test and /bin/[, use:
369
370			LINKS=	/bin/test /bin/[
371
372LINKOWN		Owner of links created with LINKS [${BINOWN}].
373
374LINKGRP		Group of links created with LINKS [${BINGRP}].
375
376LINKMODE	Mode of links created with LINKS [${BINMODE}].
377
378
379MAN		Manual pages.  If no MAN variable is defined,
380		"MAN=${PROG}.1" is assumed. See bsd.man.mk for more details.
381
382PROG		The name of the program to build.  If not supplied, nothing
383		is built.
384
385PROGNAME	The name that the above program will be installed as, if
386		different from ${PROG}.
387
388PROG_CXX	If defined, the name of the program to build.  Also
389		causes <bsd.prog.mk> to link the program with the
390		standard C++ library.  PROG_CXX overrides the value
391		of PROG if PROG is also set.
392
393PROGS		When used with <bsd.progs.mk>, allow building multiple
394PROGS_CXX	PROG and PROG_CXX in one Makefile.  To define
395		individual variables for each program the VAR.prog
396		syntax should be used.  For example:
397
398		PROGS=		foo bar
399		SRCS.foo=	foo_src.c
400		LDADD.foo=	-lutil
401		SRCS.bar=	bar_src.c
402
403		The supported variables are:
404		- BINDIR
405		- BINGRP
406		- BINMODE
407		- BINOWN
408		- CFLAGS
409		- CXXFLAGS
410		- DEBUG_FLAGS
411		- DPADD
412		- DPSRCS
413		- INTERNALPROG (no installation)
414		- LDADD
415		- LDFLAGS
416		- LIBADD
417		- LINKS
418		- MAN
419		- MLINKS
420		- NO_WERROR
421		- PROGNAME
422		- SRCS
423		- STRIP
424		- WARNS
425
426SCRIPTS		A list of interpreter scripts [file.{sh,csh,pl,awk,...}].
427		The installation is controlled by the SCRIPTSNAME, SCRIPTSOWN,
428		SCRIPTSGRP, SCRIPTSMODE, SCRIPTSDIR variables that can be
429		further specialized by SCRIPTS<VAR>_<script>.
430
431SRCS		List of source files to build the program.  If SRCS is not
432		defined, it's assumed to be ${PROG}.c or, if PROG_CXX is
433		defined, ${PROG_CXX}.cc.
434
435STRIP		The flag passed to the install program to cause the binary
436		to be stripped.  This is to be used when building your
437		own install script so that the entire system can be made
438		stripped/not-stripped using a single nob.
439
440SUBDIR		A list of subdirectories that should be built as well.
441		Each of the targets will execute the same target in the
442		subdirectories.
443
444The include file <bsd.prog.mk> includes the file named "../Makefile.inc"
445if it exists, as well as the include file <bsd.man.mk>.
446
447Some simple examples:
448
449To build foo from foo.c with a manual page foo.1, use:
450
451	PROG=	foo
452
453	.include <bsd.prog.mk>
454
455To build foo from foo.c with a manual page foo.2, add the line:
456
457	MAN=	foo.2
458
459If foo does not have a manual page at all, add the line:
460
461	MAN=
462
463If foo has multiple source files, add the line:
464
465	SRCS=	a.c b.c c.c d.c
466
467=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
468
469The include file, <bsd.compat.mk>, allows programs (built with
470<bsd.prog.mk>) to be built for one the ABI(s) supported by the
471top-level Makefile.libcompat.  It requires that <bsd.prog.mk> also be
472included.
473
474NEED_COMPAT	Build and link targeting a compatibility ABI or fail if it
475		is not available.  Supported values are "32", "soft", and
476		"any" being a wildcard.
477
478WANT_COMPAT	Similar to NEED_COMPAT, but build with the base ABI if
479		the specified ABI is not available.
480
481=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
482
483The include file, <bsd.snmpmod.mk>, handles building MIB modules for bsnmpd
484from one or more source files, along with their manual pages.  It has a
485limited number of suffixes, consistent with the current needs of the BSD
486tree.
487
488bsd.snmpmod.mk leverages bsd.lib.mk for building MIB modules and
489bsd.files.mk for installing MIB description and definition files.
490
491It implements the following additional targets:
492
493	smilint:
494		execute smilint on the MIBs defined by BMIBS.
495
496		The net-mgmt/libsmi package must be installed before
497		executing this target. The net-mgmt/net-snmp package
498		should be installed as well to reduce false positives
499		from smilint.
500
501It sets/uses the following variables:
502
503BMIBS		The MIB definitions to install.
504
505BMIBSDIR	The directory where the MIB definitions are installed.
506		This defaults to `${SHAREDIR}/snmp/mibs`.
507
508DEFS		The MIB description files to install.
509
510DEFSDIR		The directory where MIB description files are installed.
511		This defaults to `${SHAREDIR}/snmp/defs`.
512
513EXTRAMIBDEFS	Extra MIB description files to use as input when
514		generating ${MOD}_oid.h and ${MOD}_tree.[ch].
515
516EXTRAMIBSYMS	Extra MIB definition files used only for extracting
517		symbols.
518
519		EXTRAMIBSYMS are useful when resolving inter-module
520		dependencies and are useful with files containing only
521		enum-definitions.
522
523		See ${MOD}_oid.h for more details.
524
525LOCALBASE	The package root where smilint and the net-snmp
526		definitions can be found
527
528MOD		The bsnmpd module name.
529
530SMILINT		smilint binary to use with the smilint make target.
531
532SMILINT_FLAGS	flags to pass to smilint.
533
534SMIPATH		A colon-separated directory path where MIBs definitions
535		can be found. See "SMIPATH" in smi_config for more
536		details.
537
538XSYM		MIB names to extract symbols for. See ${MOD}_oid.h for
539		more details.
540
541It generates the following files:
542
543${MOD}_tree.c	A source file and header which programmatically describes
544${MOD}_tree.h	the MIB (type, OID name, ACCESS attributes, etc).
545
546		The files are generated via "gensnmptree -p".
547
548		See gensnmptree(1) for more details.
549
550${MOD}_oid.h	A header which programmatically describes the MIB root and
551		MIB tables.
552
553		The files are generated via "gensnmptree -e".
554
555		See gensnmptree(1) for more details.
556
557=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
558
559The include file <bsd.subdir.mk> contains the default targets for building
560subdirectories.  It has the same seven targets as <bsd.prog.mk>: all, clean,
561cleandir, depend, install, and tags.  For all of the directories listed in the
562variable SUBDIRS, the specified directory will be visited and the target made.
563There is also a default target which allows the command "make subdir" where
564subdir is any directory listed in the variable SUBDIRS.
565
566=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
567
568The include file <bsd.lib.mk> has support for building libraries.  It has the
569same seven targets as <bsd.prog.mk>: all, clean, cleandir, depend, install, and
570tags.  It has a limited number of suffixes, consistent with the current needs of
571the BSD tree.
572
573It sets/uses the following variables:
574
575LDADD		Additional loader objects.
576
577LIB		The name of the library to build.  Both a shared and static
578		library will be built.  NO_PIC can be set to only build a
579		static library.
580
581LIBADD		Additional libraries.  This is for base system libraries
582		and is only valid inside of the /usr/src tree.
583		Use LIBADD=name instead of LDADD=-lname.
584
585LIBDIR		Target directory for libraries.
586
587LIBGRP		Library group.
588
589LIBMODE		Library mode.
590
591LIBOWN		Library owner.
592
593LIBRARIES_ONLY	Do not build or install files other than the library.
594
595LIB_CXX		The name of the library to build. It also causes
596		<bsd.lib.mk> to link the library with the
597		standard C++ library.  LIB_CXX overrides the value
598		of LIB if LIB is also set.  Both a shared and static library
599		will be built.  NO_PIC can be set to only build a static
600		library.
601
602LINKS		The list of binary links; should be full pathnames, the
603		linked-to file coming first, followed by the linked
604		file.  The files are hard-linked.  For example, to link
605		/bin/test and /bin/[, use:
606
607			LINKS=	/bin/test /bin/[
608
609LINKOWN		Owner of links created with LINKS [${LIBOWN}].
610
611LINKGRP		Group of links created with LINKS [${LIBGRP}].
612
613LINKMODE	Mode of links created with LINKS [${LIBMODE}].
614
615LINTLIBDIR	Target directory for lint libraries.
616
617MAN		The manual pages to be installed. See bsd.man.mk for more
618		details.
619
620SHLIB		Like LIB but only builds a shared library.
621
622SHLIB_CXX	Like LIB_CXX but only builds a shared library.
623
624SHLIB_LDSCRIPT	Template file to generate shared library linker script.
625		If not defined, a simple symlink is created to the real
626		shared object.
627
628SRCS		List of source files to build the library.  Suffix types
629		.s, .c, and .f are supported.  Note, .s files are preferred
630		to .c files of the same name.  (This is not the default for
631		versions of make.)
632
633The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
634if it exists, as well as the include file <bsd.man.mk>.
635
636It has rules for building profiled objects; profiled libraries are
637built by default.
638
639Libraries are ranlib'd before installation.
640
641=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
642
643The include file <bsd.test.mk> handles building one or more test programs
644intended to be used in the FreeBSD Test Suite under /usr/tests/.
645
646It has seven targets:
647
648	all:
649		build the test programs.
650	check:
651		runs the test programs with kyua test.
652
653		The beforecheck and aftercheck targets will be invoked, if
654		defined, to execute commands before and after the realcheck
655		target has been executed, respectively.
656
657		The devel/kyua package must be installed before invoking this
658		target.
659	clean:
660		remove the test programs and any object files.
661	cleandir:
662		remove all of the files removed by the target clean, as
663		well as .depend and tags.
664	depend:
665		make the dependencies for the source files, and store
666		them in the file .depend.
667	install:
668                install the test programs and their data files; if the
669                Makefile does not itself define the target install, the
670                targets beforeinstall and afterinstall may also be used
671                to cause actions immediately before and after the
672                install target is executed.
673	tags:
674		create a tags file for the source files.
675
676It sets/uses the following variables, among many others:
677
678ATF_TESTS_C	The names of the ATF C test programs to build.
679
680ATF_TESTS_CXX	The names of the ATF C++ test programs to build.
681
682ATF_TESTS_SH	The names of the ATF sh test programs to build.
683
684GTESTS		The names of the GoogleTest test programs to build.
685
686KYUAFILE	If 'auto' (the default), generate a Kyuafile out of the
687		test programs defined in the Makefile.  If 'yes', then a
688		manually-crafted Kyuafile must be supplied with the
689		sources.  If 'no', no Kyuafile is installed (useful for
690		subdirectories providing helper programs or data files
691		only).
692
693LOCALBASE	The --prefix for the kyua package.
694
695		The value of LOCALBASE defaults to /usr/local .
696
697NOT_FOR_TEST_SUITE
698		If defined, none of the built test programs get
699		installed under /usr/tests/ and no Kyuafile is
700		automatically generated.  Should not be used within the
701		FreeBSD source tree but is provided for the benefit of
702		third-parties.
703
704PLAIN_TESTS_C	The names of the plain (legacy) programs to build.
705
706PLAIN_TESTS_CXX	The names of the plain (legacy) test programs to build.
707
708PLAIN_TESTS_SH	The names of the plain (legacy) test programs to build.
709
710TAP_PERL_INTERPRETER
711		Path to the Perl interpreter to be used for
712		TAP-compliant test programs that are written in Perl.
713		Refer to TAP_TESTS_PERL for details.
714
715TAP_TESTS_C	The names of the TAP-compliant C test programs to build.
716
717TAP_TESTS_CXX	The names of the TAP-compliant C++ test programs to
718		build.
719
720TAP_TESTS_PERL	The names of the TAP-compliant Perl test programs to
721		build.  The corresponding source files should end with
722		the .pl extension; the test program is marked as
723		requiring Perl; and TAP_PERL_INTERPRETER is used in the
724		built scripts as the interpreter of choice.
725
726TAP_TESTS_SH	The names of the TAP-compliant sh test programs to
727		build.
728
729TESTSBASE	Installation prefix for tests. Defaults to /usr/tests
730
731TESTSDIR	Path to the installed tests.  Must be a subdirectory of
732		TESTSBASE and the subpath should match the relative
733		location of the tests within the src tree.
734
735		The value of TESTSDIR defaults to
736		${TESTSBASE}/${RELDIR:H} , e.g. /usr/tests/bin/ls when
737		included from bin/ls/tests .
738
739TESTS_SUBDIRS	List of subdirectories containing tests into which to
740		recurse.  Differs from SUBDIR in that these directories
741		get registered into the automatically-generated
742		Kyuafile (if any).
743
744The actual building of the test programs is performed by <bsd.prog.mk>.
745Please see the documentation above for this other file for additional
746details on the behavior of <bsd.test.mk>.
747