301 lines
9.2 KiB
Plaintext
301 lines
9.2 KiB
Plaintext
# @(#)bsd.README 8.2 (Berkeley) 4/2/94
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This is the README file for the new make "include" files for the BSD
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source tree. The files are installed in /usr/share/mk, and are, by
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convention, named with the suffix ".mk". Each ".mk" file has a
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corresponding ".rd" file which is an explanation of the ".mk" file.
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Note, this file is not intended to replace reading through the .mk
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files for anything tricky.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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RANDOM THINGS WORTH KNOWING:
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The files are simply C-style #include files, and pretty much behave like
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you'd expect. The syntax is slightly different in that a single '.' is
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used instead of the hash mark, i.e. ".include <bsd.prog.mk>".
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One difference that will save you lots of debugging time is that inclusion
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of the file is normally done at the *end* of the Makefile. The reason for
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this is because .mk files often modify variables and behavior based on the
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values of variables set in the Makefile. To make this work, remember that
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the FIRST target found is the target that is used, i.e. if the Makefile has:
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a:
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echo a
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a:
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echo a number two
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the command "make a" will echo "a". To make things confusing, the SECOND
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variable assignment is the overriding one, i.e. if the Makefile has:
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a= foo
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a= bar
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b:
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echo ${a}
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the command "make b" will echo "bar". This is for compatibility with the
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way the V7 make behaved.
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It's fairly difficult to make the BSD .mk files work when you're building
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multiple programs in a single directory. It's a lot easier split up the
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programs than to deal with the problem. Most of the agony comes from making
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the "obj" directory stuff work right, not because we switch to a new version
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of make. So, don't get mad at us, figure out a better way to handle multiple
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architectures so we can quit using the symbolic link stuff. (Imake doesn't
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count.)
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The file .depend in the source directory is expected to contain dependencies
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for the source files. This file is read automatically by make after reading
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the Makefile.
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The variable DESTDIR works as before. It's not set anywhere but will change
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the tree where the file gets installed.
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The profiled libraries are no longer built in a different directory than
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the regular libraries. A new suffix, ".po", is used to denote a profiled
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object.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <sys.mk> has the default rules for all makes, in the BSD
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environment or otherwise. You probably don't want to touch this file.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.man.mk> handles installing manual pages and their
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links.
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It has a single target:
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maninstall:
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Install the manual pages and their links.
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It sets/uses the following variables:
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MANDIR Base path for manual installation.
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MANGRP Manual group.
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MANOWN Manual owner.
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MANMODE Manual mode.
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MANSUBDIR Subdirectory under the manual page section, i.e. "/vax"
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or "/tahoe" for machine specific manual pages.
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MAN1 ... MAN8 The manual pages to be installed (use a .0 suffix).
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MLINKS List of manual page links (using a .1 - .8 suffix). The
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linked-to file must come first, the linked file second,
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and there may be multiple pairs. The files are soft-linked.
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The include file <bsd.man.mk> includes a file named "../Makefile.inc" if
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it exists.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.own.mk> contains the owners, groups, etc. for both
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manual pages and binaries.
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It has no targets.
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It sets/uses the following variables:
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BINGRP Binary group.
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BINOWN Binary owner.
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BINMODE Binary mode.
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STRIP The flag passed to the install program to cause the binary
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to be stripped. This is to be used when building your
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own install script so that the entire system can be made
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stripped/not-stripped using a single nob.
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MANDIR Base path for manual installation.
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MANGRP Manual group.
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MANOWN Manual owner.
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MANMODE Manual mode.
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This file is generally useful when building your own Makefiles so that
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they use the same default owners etc. as the rest of the tree.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.prog.mk> handles building programs from one or
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more source files, along with their manual pages. It has a limited number
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of suffixes, consistent with the current needs of the BSD tree.
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It has seven targets:
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all:
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build the program and its manual page
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clean:
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remove the program, any object files and the files a.out,
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Errs, errs, mklog, and ${PROG}.core.
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cleandir:
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remove all of the files removed by the target clean, as
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well as .depend, tags, and any manual pages.
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depend:
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make the dependencies for the source files, and store
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them in the file .depend.
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install:
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install the program and its manual pages; if the Makefile
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does not itself define the target install, the targets
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beforeinstall and afterinstall may also be used to cause
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actions immediately before and after the install target
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is executed.
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lint:
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run lint on the source files
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tags:
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create a tags file for the source files.
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It sets/uses the following variables:
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BINGRP Binary group.
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BINOWN Binary owner.
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BINMODE Binary mode.
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CLEANFILES Additional files to remove for the clean and cleandir targets.
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COPTS Additional flags to the compiler when creating C objects.
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HIDEGAME If HIDEGAME is defined, the binary is installed in
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/usr/games/hide, and a symbolic link is created to
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/usr/games/dm.
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LDADD Additional loader objects. Usually used for libraries.
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For example, to load with the compatibility and utility
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libraries, use:
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LDFILES=-lutil -lcompat
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LDFLAGS Additional loader flags.
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LINKS The list of binary links; should be full pathnames, the
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linked-to file coming first, followed by the linked
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file. The files are hard-linked. For example, to link
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/bin/test and /bin/[, use:
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LINKS= ${DESTDIR}/bin/test ${DESTDIR}/bin/[
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MAN1...MAN8 Manual pages (should end in .0). If no MAN variable is
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defined, "MAN1=${PROG}.0" is assumed.
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PROG The name of the program to build. If not supplied, nothing
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is built.
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SRCS List of source files to build the program. If PROG is not
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defined, it's assumed to be ${PROG}.c.
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DPADD Additional dependencies for the program. Usually used for
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libraries. For example, to depend on the compatibility and
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utility libraries use:
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SRCLIB=${LIBCOMPAT} ${LIBUTIL}
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The following libraries are predefined for DPADD:
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LIBC /lib/libc.a
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LIBCOMPAT /usr/lib/libcompat.a
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LIBCURSES /usr/lib/libcurses.a
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LIBDBM /usr/lib/libdbm.a
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LIBDES /usr/lib/libdes.a
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LIBL /usr/lib/libl.a
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LIBKDB /usr/lib/libkdb.a
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LIBKRB /usr/lib/libkrb.a
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LIBM /usr/lib/libm.a
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LIBMP /usr/lib/libmp.a
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LIBPC /usr/lib/libpc.a
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LIBPLOT /usr/lib/libplot.a
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LIBRPC /usr/lib/sunrpc.a
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LIBTERM /usr/lib/libterm.a
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LIBUTIL /usr/lib/libutil.a
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SHAREDSTRINGS If defined, a new .c.o rule is used that results in shared
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strings, using xstr(1).
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STRIP The flag passed to the install program to cause the binary
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to be stripped.
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SUBDIR A list of subdirectories that should be built as well.
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Each of the targets will execute the same target in the
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subdirectories.
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The include file <bsd.prog.mk> includes the file named "../Makefile.inc"
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if it exists, as well as the include file <bsd.man.mk>.
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Some simple examples:
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To build foo from foo.c with a manual page foo.1, use:
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PROG= foo
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.include <bsd.prog.mk>
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To build foo from foo.c with a manual page foo.2, add the line:
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MAN2= foo.0
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If foo does not have a manual page at all, add the line:
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NOMAN= noman
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If foo has multiple source files, add the line:
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SRCS= a.c b.c c.c d.c
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.subdir.mk> contains the default targets for building
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subdirectories. It has the same seven targets as <bsd.prog.mk>: all, clean,
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cleandir, depend, install, lint, and tags. For all of the directories
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listed in the variable SUBDIRS, the specified directory will be visited
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and the target made. There is also a default target which allows the
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command "make subdir" where subdir is any directory listed in the variable
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SUBDIRS.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.lib.mk> has support for building libraries. It has
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the same seven targets as <bsd.prog.mk>: all, clean, cleandir, depend,
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install, lint, and tags. It has a limited number of suffixes, consistent
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with the current needs of the BSD tree.
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It sets/uses the following variables:
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LIBDIR Target directory for libraries.
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LINTLIBDIR Target directory for lint libraries.
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LIBGRP Library group.
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LIBOWN Library owner.
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LIBMODE Library mode.
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LDADD Additional loader objects.
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MAN1 ... MAN8 The manual pages to be installed (use a .0 suffix).
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SRCS List of source files to build the library. Suffix types
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.s, .c, and .f are supported. Note, .s files are preferred
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to .c files of the same name. (This is not the default for
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versions of make.)
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The include file <bsd.lib.mk> includes the file named "../Makefile.inc"
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if it exists, as well as the include file <bsd.man.mk>.
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It has rules for building profiled objects; profiled libraries are
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built by default.
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Libraries are ranlib'd before installation.
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