Annotation of src/share/mk/bsd.README, Revision 1.62
1.62 ! deraadt 1: # $OpenBSD: bsd.README,v 1.61 2015/10/26 10:43:42 bluhm Exp $
1.8 deraadt 2: # $NetBSD: bsd.README,v 1.17 1996/04/13 02:08:08 thorpej Exp $
1.1 deraadt 3: # @(#)bsd.README 5.1 (Berkeley) 5/11/90
4:
5: This is the README file for the new make "include" files for the BSD
6: source tree. The files are installed in /usr/share/mk, and are, by
7: convention, named with the suffix ".mk".
1.17 espie 8:
9: bsd.dep.mk - handle Makefile dependencies
10: bsd.lib.mk - support for building libraries
11: bsd.man.mk - installing manual pages and their links
12: bsd.obj.mk - creating 'obj' directories and cleaning up
13: bsd.own.mk - define common variables
14: bsd.port.mk - building ports
1.46 espie 15: bsd.port.arch.mk - glue for building ports with MD stuff
1.17 espie 16: bsd.port.subdir.mk - targets for building subdirectories for ports
17: bsd.prog.mk - building programs from source files
1.30 provos 18: bsd.regress.mk - regression tests
19: bsd.subdir.mk - targets for building subdirectories
1.17 espie 20: bsd.sys.mk - building bsd from the source tree
1.1 deraadt 21:
22: Note, this file is not intended to replace reading through the .mk
23: files for anything tricky.
24:
25: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
26:
27: RANDOM THINGS WORTH KNOWING:
28:
29: The files are simply C-style #include files, and pretty much behave like
30: you'd expect. The syntax is slightly different in that a single '.' is
31: used instead of the hash mark, i.e. ".include <bsd.prog.mk>".
32:
33: One difference that will save you lots of debugging time is that inclusion
34: of the file is normally done at the *end* of the Makefile. The reason for
35: this is because .mk files often modify variables and behavior based on the
36: values of variables set in the Makefile. To make this work, remember that
37: the FIRST target found is the target that is used, i.e. if the Makefile has:
38:
39: a:
40: echo a
41: a:
42: echo a number two
43:
44: the command "make a" will echo "a". To make things confusing, the SECOND
45: variable assignment is the overriding one, i.e. if the Makefile has:
46:
47: a= foo
48: a= bar
49:
50: b:
51: echo ${a}
52:
53: the command "make b" will echo "bar". This is for compatibility with the
54: way the V7 make behaved.
55:
1.23 espie 56: To make things even more confusing, make uses lazy evaluation. All
57: variables are expanded only when needed. Which means that, in
58:
59: a= foo
60:
61: b: $(a)
62: echo $(.ALLSRC)
63: echo $(a)
64:
65: foo:
66: touch foo
67:
68: a= bar
69:
70: the command "make b" will echo "foo"; echo "bar". The first $(a) means
71: "foo", because it's needed to generate the dependency rule when it's read,
72: but the second $(a) is only expanded when needed, at which point a contains
73: bar.
74:
1.1 deraadt 75: It's fairly difficult to make the BSD .mk files work when you're building
1.16 espie 76: multiple programs in a single directory. It's a lot easier to split up the
1.1 deraadt 77: programs than to deal with the problem. Most of the agony comes from making
1.16 espie 78: the "obj" directory stuff work right, not because we switched to a new version
1.1 deraadt 79: of make. So, don't get mad at us, figure out a better way to handle multiple
80: architectures so we can quit using the symbolic link stuff. (Imake doesn't
81: count.)
82:
83: The file .depend in the source directory is expected to contain dependencies
84: for the source files. This file is read automatically by make after reading
85: the Makefile.
86:
87: The variable DESTDIR works as before. It's not set anywhere but will change
88: the tree where the file gets installed.
89:
90: The profiled libraries are no longer built in a different directory than
91: the regular libraries. A new suffix, ".po", is used to denote a profiled
92: object.
93:
94: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
95:
96: The include file <sys.mk> has the default rules for all makes, in the BSD
97: environment or otherwise. You probably don't want to touch this file.
98:
99: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
100:
101: The include file <bsd.man.mk> handles installing manual pages and their
102: links.
103:
104: It has a single target:
105:
106: maninstall:
107: Install the manual pages and their links.
108:
109: It sets/uses the following variables:
110:
111: MANDIR Base path for manual installation.
112:
113: MANGRP Manual group.
114:
115: MANOWN Manual owner.
116:
117: MANMODE Manual mode.
118:
1.24 mpech 119: MANSUBDIR Subdirectory under the manual page section, i.e. "vax"
120: or "tahoe" for machine specific manual pages.
1.1 deraadt 121:
1.4 niklas 122: MAN The manual pages to be installed (use a .1 - .9 suffix).
1.1 deraadt 123:
1.4 niklas 124: MLINKS List of manual page links (using a .1 - .9 suffix). The
1.1 deraadt 125: linked-to file must come first, the linked file second,
126: and there may be multiple pairs. The files are soft-linked.
1.40 espie 127:
128: BEFOREMAN List of extra targets that must be already built before the
129: man target can be run. Those targets must be real files (and
130: not .PHONY targets).
1.1 deraadt 131:
132: The include file <bsd.man.mk> includes a file named "../Makefile.inc" if
133: it exists.
134:
135: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
136:
1.8 deraadt 137: The include file <bsd.own.mk> contains source tree configuration parameters,
138: such as the owners, groups, etc. for both manual pages and binaries, and
139: a few global "feature configuration" parameters.
1.1 deraadt 140:
141: It has no targets.
142:
1.8 deraadt 143: To get system-specific configuration parameters, bsd.own.mk will try to
144: include the file specified by the "MAKECONF" variable. If MAKECONF is not
145: set, or no such file exists, the system make configuration file, /etc/mk.conf
146: is included. These files may define any of the variables described below.
147:
148: bsd.own.mk sets the following variables, if they are not already defined
149: (defaults are in brackets):
1.4 niklas 150:
151: BSDSRCDIR The real path to the system sources, so that 'make obj'
152: will work correctly. [/usr/src]
153:
154: BSDOBJDIR The real path to the system 'obj' tree, so that 'make obj'
155: will work correctly. [/usr/obj]
156:
157: BINGRP Binary group. [bin]
158:
1.10 deraadt 159: BINOWN Binary owner. [root]
1.4 niklas 160:
161: BINMODE Binary mode. [555]
162:
163: NONBINMODE Mode for non-executable files. [444]
164:
1.23 espie 165: DIRMODE Mode for new directories. [755]
166:
1.45 schwarze 167: MANDIR Base path for manual installation. [/usr/share/man/man]
1.4 niklas 168:
169: MANGRP Manual group. [bin]
170:
1.18 millert 171: MANOWN Manual owner. [root]
1.4 niklas 172:
173: MANMODE Manual mode. [${NONBINMODE}]
174:
175: LIBDIR Base path for library installation. [/usr/lib]
176:
177: LIBGRP Library group. [${BINGRP}]
178:
179: LIBOWN Library owner. [${BINOWN}]
180:
181: LIBMODE Library mode. [${NONBINMODE}]
182:
1.44 jmc 183: DOCDIR Base path for system documentation
1.4 niklas 184: installation. [/usr/share/doc]
185:
186: DOCGRP Documentation group. [bin]
187:
1.18 millert 188: DOCOWN Documentation owner. [root]
1.4 niklas 189:
190: DOCMODE Documentation mode. [${NONBINMODE}]
1.1 deraadt 191:
1.15 millert 192: INSTALL_STRIP The flag passed to the install program to cause the binary
1.1 deraadt 193: to be stripped. This is to be used when building your
194: own install script so that the entire system can be made
1.15 millert 195: stripped/not-stripped using a single knob. Note that
196: INSTALL_STRIP is not set if ${DEBUG} is defined. [-s]
1.1 deraadt 197:
1.15 millert 198: INSTALL_COPY The old usage of this flag is obsolescent since install(1)
199: now copies by default. However, it can also be used to
200: specify that a file not be copied unless it is different
201: (via the -p option). See install(1) for details. This
202: is to be used when building our own install script so
203: that the entire system can either be installed with copies,
204: or copy-if-different using a single knob. [-c]
1.4 niklas 205:
1.8 deraadt 206: Additionally, the following variables may be set by bsd.own.mk or in a
207: make configuration file to modify the behaviour of the system build
208: process (default values are in brackets along with comments, if set by
209: bsd.own.mk):
1.23 espie 210:
1.4 niklas 211: SKEY Compile in support for S/key authentication. [yes, set
212: unconditionally]
213:
214: SYS_INCLUDE Copy or symlink kernel include files into /usr/include.
215: Possible values are "symlinks" or "copies" (which is
216: the same as the variable being unset).
1.1 deraadt 217:
1.28 brad 218: NOPROFILE Do not build profiled versions of system libraries.
1.1 deraadt 219:
1.4 niklas 220: NOPIC Do not build PIC versions of system libraries, and
1.28 brad 221: do not build shared libraries.
1.48 pascal 222:
223: NOPIE Do not build PIE objects or executables.
1.1 deraadt 224:
1.22 niklas 225: DEBUG Add -g to assembly, C compiler and linking passes. Also
226: doesn't set STRIP to -s per default if defined.
227:
228: DEBUGLIBS Create libraries with -g debug information, and install
229: them in /usr/lib/debug.
1.27 espie 230:
231: WARNINGS Adds appropriate warning flags (defined in CDIAGFLAGS,
232: e.g., -Wall...) to compiles. [no]
1.19 millert 233:
234: SUDO Command to run when doing "make install" portion of
235: "make build". If set to sudo, this allows one to run
236: "make build" as a user other than root (assuming sudo
237: is setup for that user).
238:
239: PIPE If set to "-pipe" gcc will be given the -pipe option
240: which can speed up compiles on machines with memory
241: to spare. Instead of using temp files, gcc uses pipes
242: for the temporary data.
1.20 kstailey 243:
244: GLOBAL_AUTOCONF_CACHE
245: Set to the name of a file that all cached GNU autoconf
246: test results will be saved in. Reduces redundant tests.
1.23 espie 247: Be careful! Redundant tests may not be redundant if you
248: are installing substantially updated gnu programs.
1.1 deraadt 249:
1.8 deraadt 250: bsd.own.mk is generally useful when building your own Makefiles so that
1.1 deraadt 251: they use the same default owners etc. as the rest of the tree.
252:
253: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
254:
255: The include file <bsd.prog.mk> handles building programs from one or
256: more source files, along with their manual pages. It has a limited number
257: of suffixes, consistent with the current needs of the BSD tree.
258:
1.58 schwarze 259: It has seven targets:
1.1 deraadt 260:
261: all:
262: build the program and its manual page
263: clean:
264: remove the program, any object files and the files a.out,
265: Errs, errs, mklog, and core.
266: cleandir:
267: remove all of the files removed by the target clean, as
268: well as .depend, tags, and any manual pages.
269: depend:
270: make the dependencies for the source files, and store
271: them in the file .depend.
1.8 deraadt 272: includes:
273: install any header files.
1.1 deraadt 274: install:
275: install the program and its manual pages; if the Makefile
276: does not itself define the target install, the targets
277: beforeinstall and afterinstall may also be used to cause
278: actions immediately before and after the install target
279: is executed.
280: tags:
281: create a tags file for the source files.
282:
283: It sets/uses the following variables:
284:
285: BINGRP Binary group.
286:
287: BINOWN Binary owner.
288:
289: BINMODE Binary mode.
290:
291: CLEANFILES Additional files to remove for the clean and cleandir targets.
292:
293: COPTS Additional flags to the compiler when creating C objects.
294:
295: LDADD Additional loader objects. Usually used for libraries.
1.53 deraadt 296: For example, to load with the crypto and utility
1.1 deraadt 297: libraries, use:
298:
1.53 deraadt 299: LDADD+=-lutil -lcrypto
1.1 deraadt 300:
301: LDFLAGS Additional loader flags.
302:
303: LINKS The list of binary links; should be full pathnames, the
304: linked-to file coming first, followed by the linked
305: file. The files are hard-linked. For example, to link
306: /bin/test and /bin/[, use:
307:
308: LINKS= ${DESTDIR}/bin/test ${DESTDIR}/bin/[
309:
1.4 niklas 310: MAN Manual pages (should end in .1 - .9). If no MAN variable is
1.1 deraadt 311: defined, "MAN=${PROG}.1" is assumed.
312:
313: PROG The name of the program to build. If not supplied, nothing
314: is built.
315:
1.6 mickey 316: SRCS List of source files to build the program. If it's not
1.1 deraadt 317: defined, it's assumed to be ${PROG}.c.
318:
319: DPADD Additional dependencies for the program. Usually used for
1.53 deraadt 320: libraries. For example, to depend on the crypto and
1.1 deraadt 321: utility libraries use:
322:
1.53 deraadt 323: DPADD+=${LIBCRYPTO} ${LIBUTIL}
1.1 deraadt 324:
325: The following libraries are predefined for DPADD:
326:
1.31 espie 327: LIBC /usr/lib/libc.a
328: LIBCRYPTO /usr/lib/libcrypto.a
1.1 deraadt 329: LIBCURSES /usr/lib/libcurses.a
1.26 millert 330: LIBEDIT /usr/lib/libedit.a
1.32 millert 331: LIBEVENT /usr/lib/libevent.a
1.42 miod 332: LIBEXPAT /usr/lib/libexpat.a
333: LIBFORM /usr/lib/libform.a
334: LIBFORMW /usr/lib/libformw.a
1.26 millert 335: LIBKEYNOTE /usr/lib/libkeynote.a
1.1 deraadt 336: LIBKVM /usr/lib/libkvm.a
1.26 millert 337: LIBL /usr/lib/libl.a
1.1 deraadt 338: LIBM /usr/lib/libm.a
1.42 miod 339: LIBMENU /usr/lib/libmenu.a
340: LIBMENUW /usr/lib/libmenuw.a
1.60 yasuoka 341: LIBRADIUS /usr/lib/libradius.a
1.42 miod 342: LIBOSSAUDIO /usr/lib/libossaudio.a
343: LIBPANEL /usr/lib/libpanel.a
344: LIBPANELW /usr/lib/libpanelw.a
1.31 espie 345: LIBPCAP /usr/lib/libpcap.a
1.21 millert 346: LIBPERL /usr/lib/libperl.a
1.42 miod 347: LIBPTHREAD /usr/lib/libpthread.a
1.26 millert 348: LIBRPCSVC /usr/lib/librpcsvc.a
349: LIBSKEY /usr/lib/libskey.a
1.42 miod 350: LIBSNDIO /usr/lib/libsndio.a
1.26 millert 351: LIBSSL /usr/lib/libssl.a
1.9 tholo 352: LIBTERMCAP /usr/lib/libtermcap.a
353: LIBTERMLIB /usr/lib/libtermlib.a
1.59 jsing 354: LIBTLS /usr/lib/libtls.a
1.31 espie 355: LIBUSB /usr/lib/libusbhid.a
1.1 deraadt 356: LIBUTIL /usr/lib/libutil.a
1.31 espie 357: LIBY /usr/lib/liby.a
1.13 deraadt 358: LIBZ /usr/lib/libz.a
1.31 espie 359: LIBARCH arch-dependent stuff
1.1 deraadt 360:
361: STRIP The flag passed to the install program to cause the binary
362: to be stripped.
363:
364: SUBDIR A list of subdirectories that should be built as well.
365: Each of the targets will execute the same target in the
366: subdirectories.
367:
368: The include file <bsd.prog.mk> includes the file named "../Makefile.inc"
369: if it exists, as well as the include file <bsd.man.mk>.
370:
371: Some simple examples:
372:
373: To build foo from foo.c with a manual page foo.1, use:
374:
375: PROG= foo
376:
377: .include <bsd.prog.mk>
378:
379: To build foo from foo.c with a manual page foo.2, add the line:
380:
381: MAN= foo.2
382:
383: If foo does not have a manual page at all, add the line:
384:
385: NOMAN= noman
386:
387: If foo has multiple source files, add the line:
388:
389: SRCS= a.c b.c c.c d.c
390:
391: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
392:
393: The include file <bsd.subdir.mk> contains the default targets for building
1.58 schwarze 394: subdirectories. It has the same seven targets as <bsd.prog.mk>: all,
1.47 jsg 395: clean, cleandir, depend, includes, install, and tags. For all of
1.41 jmc 396: the directories listed in the variable SUBDIR, the specified directory
1.8 deraadt 397: will be visited and the target made. There is also a default target which
398: allows the command "make subdir" where subdir is any directory listed in
1.41 jmc 399: the variable SUBDIR.
1.2 deraadt 400:
401: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
402:
403: The include file <bsd.sys.mk> is used by <bsd.prog.mk> and
1.3 deraadt 404: <bsd.lib.mk>. It contains overrides that are used when building
1.14 millert 405: the OpenBSD source tree. For instance, if "PARALLEL" is defined by
1.3 deraadt 406: the program/library Makefile, it includes a set of rules for lex and
407: yacc that allow multiple lex and yacc targets to be built in parallel.
1.1 deraadt 408:
409: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
410:
411: The include file <bsd.lib.mk> has support for building libraries. It has
1.58 schwarze 412: the same seven targets as <bsd.prog.mk>: all, clean, cleandir, depend,
1.47 jsg 413: includes, install, and tags. It has a limited number of suffixes,
1.8 deraadt 414: consistent with the current needs of the BSD tree.
1.1 deraadt 415:
416: It sets/uses the following variables:
417:
418: LIB The name of the library to build.
419:
420: LIBDIR Target directory for libraries.
421:
422: LIBGRP Library group.
423:
424: LIBOWN Library owner.
425:
426: LIBMODE Library mode.
427:
428: LDADD Additional loader objects.
429:
1.4 niklas 430: MAN The manual pages to be installed (use a .1 - .9 suffix).
1.1 deraadt 431:
432: SRCS List of source files to build the library. Suffix types
433: .s, .c, and .f are supported. Note, .s files are preferred
434: to .c files of the same name. (This is not the default for
435: versions of make.)
436:
437: The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
438: if it exists, as well as the include file <bsd.man.mk>.
439:
440: It has rules for building profiled objects; profiled libraries are
441: built by default.
442:
443: Libraries are ranlib'd when made.
1.52 guenther 444:
445: In addition, a reduced version of a library, including just specific
446: objects that are compiled with additional options to reduce their
447: size may be built. This is used by the distrib/ tree and crunchgen
448: when building ramdisks. This sets/uses the following variables:
449:
450: DIST_LIB The path of the library to build. [lib${LIB}_d.a]
451:
452: DIST_OBJS The (sub)set of .o files to include in ${DIST_LIB}. [${OBJS}]
453:
454: DIST_CFLAGS Additional flags for the C compiler and assembler.
455: [-Os]
1.6 mickey 456:
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