necessary owner, group, mode and flags. Approved by: bapt (mentor) Differential Revision: https://reviews.freebsd.org/D16405
713 lines
23 KiB
Plaintext
713 lines
23 KiB
Plaintext
# @(#)bsd.README 8.2 (Berkeley) 4/2/94
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# $FreeBSD$
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This is the README file for the "include" files for the FreeBSD
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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". These files store several
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build options and should be handled with caution.
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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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There are two main types of make include files. One type is the generally
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usable make include files, such as bsd.prog.mk and bsd.lib.mk. The other is
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the internal make include files, such as bsd.files.mk and bsd.man.mk, which
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can not/should not be used directly but are used by the other make include
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files. In most cases it is only interesting to include bsd.prog.mk or
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bsd.lib.mk.
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bsd.arch.inc.mk - includes arch-specific Makefile.$arch
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bsd.compiler.mk - defined based on current compiler
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bsd.confs.mk - install of configuration files
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bsd.cpu.mk - sets CPU/arch-related variables (included from sys.mk)
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bsd.crunchgen.mk - building crunched binaries using crunchgen(1)
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bsd.dep.mk - handle Makefile dependencies
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bsd.dirs.mk - handle directory creation
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bsd.doc.mk - building troff system documents
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bsd.endian.mk - TARGET_ENDIAN=1234(little) or 4321 (big) for target
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bsd.files.mk - install of general purpose files
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bsd.incs.mk - install of include files
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bsd.info.mk - building GNU Info hypertext system (deprecated)
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bsd.init.mk - initialization for the make include files
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bsd.kmod.mk - building loadable kernel modules
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bsd.lib.mk - support for building libraries
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bsd.libnames.mk - define library names
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bsd.links.mk - install of links (sym/hard)
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bsd.man.mk - install of manual pages and their links
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bsd.nls.mk - build and install of NLS catalogs
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bsd.obj.mk - creating 'obj' directories and cleaning up
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bsd.own.mk - define common variables
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bsd.port.mk - building ports
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bsd.port.post.mk - building ports
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bsd.port.pre.mk - building ports
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bsd.port.subdir.mk - targets for building subdirectories for ports
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bsd.prog.mk - building programs from source files
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bsd.progs.mk - build multiple programs from sources
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bsd.snmpmod.mk - building modules for the SNMP daemon bsnmpd
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bsd.subdir.mk - targets for building subdirectories
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bsd.sys.mk - common settings used for building FreeBSD sources
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bsd.test.mk - building test programs from source files
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sys.mk - default rules for all makes
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This file does not document bsd.port*.mk. They are documented in ports(7).
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See also make(1), mkdep(1), style.Makefile(5) and `PMake - A
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Tutorial', located in /usr/share/doc/psd/12.make.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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Random things worth knowing about this document:
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If appropriate when documenting the variables the default value is
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indicated using square brackets e.g. [gzip].
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In some cases the default value depend on other values (e.g. system
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architecture). In these cases the most common value is indicated.
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This document contains some simple examples of the usage of the BSD make
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include files. For more examples look at the makefiles in the FreeBSD
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source tree.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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RANDOM THINGS WORTH KNOWING:
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The files are like 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 to split up
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the programs than to deal with the problem. Most of the agony comes from
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making the "obj" directory stuff work right, not because we switch to a new
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version of make. So, don't get mad at us, figure out a better way to handle
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multiple architectures so we can quit using the symbolic link stuff.
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(Imake doesn't count.)
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The file .depend in the source directory is expected to contain dependencies
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for the source files. This file is read automatically by make after reading
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the Makefile.
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The variable DESTDIR works as before. It's not set anywhere but will change
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the tree where the file gets installed.
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The profiled libraries are no longer built in a different directory than
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the regular libraries. A new suffix, ".po", is used to denote a profiled
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object, and ".pico" denotes a position-independent relocatable object.
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".nossppico" denotes a position-independent relocatable object without
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stack smashing protection.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The following variables are common:
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AFLAGS.${SRC}
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Flags dependent on source file name.
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ACFLAGS.${SRC}
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Flags dependent on source file name.
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CFLAGS.${SRC}
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Flags dependent on source file name.
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CFLAGS.${COMPILER_TYPE}
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Flags dependent on compiler added to CFLAGS.
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CFLAGS.${MACHINE_ARCH}
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Architectural flags added to CFLAGS.
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CFLAGS_NO_SIMD Add this to CFLAGS for programs that don't want any SIMD
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instructions generated. It is setup in bsd.cpu.mk to an
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appropriate value for the compiler and target.
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CXXFLAGS.${COMPILER_TYPE}
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Flags dependent on compiler added to CXXFLAGS.
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CXXFLAGS.${MACHINE_ARCH}
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Architectural flags added to CXXFLAGS.
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CXXFLAGS.${SRC}
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Flags dependent on source file name.
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COMPILER_FEATURES
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A list of features that the compiler supports. Zero or
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more of:
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c++11 Supports full C++ 11 standard.
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COMPILER_TYPE Type of compiler, either clang or gcc, though other
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values are possible. Don't assume != clang == gcc.
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COMPILER_VERSION
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A numeric constant equal to:
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major * 10000 + minor * 100 + tiny
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for the compiler's self-reported version.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <sys.mk> has the default rules for all makes, in the BSD
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environment or otherwise. You probably don't want to touch this file.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.arch.inc.mk> includes other Makefiles for specific
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architectures, if they exist. It will include the first of the following
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files that it finds: Makefile.${MACHINE}, Makefile.${MACHINE_ARCH},
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Makefile.${MACHINE_CPUARCH}
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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 three targets:
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all-man:
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build manual pages.
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maninstall:
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install the manual pages and their links.
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manlint:
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verify the validity of manual pages.
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It sets/uses the following variables:
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MAN The manual pages to be installed (use a .1 - .9 suffix).
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MANDIR Base path for manual installation.
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MANGRP Manual group.
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MANMODE Manual mode.
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MANOWN Manual owner.
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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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MLINKS List of manual page links (using a .1 - .9 suffix). The
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linked-to file must come first, the linked file second,
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and there may be multiple pairs. The files are hard-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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BINMODE Binary mode.
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BINOWN Binary owner.
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MANDIR Base path for manual installation.
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MANGRP Manual group.
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MANMODE Manual mode.
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MANOWN Manual owner.
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INSTALL_LINK Command to install a hard link.
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INSTALL_SYMLINK Command to install a symbolic link.
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INSTALL_RSYMLINK Command to install a relative symbolic link.
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LINKOWN Owner of hard links created by INSTALL_LINK.
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LINKGRP Group of hard links created by INSTALL_LINK.
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LINKMODE Mode of hard links created by INSTALL_LINK.
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SYMLINKOWN Owner of hard links created by INSTALL_[R]SYMLINK.
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SYMLINKGRP Group of hard links created by INSTALL_[R]SYMLINK.
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SYMLINKMODE Mode of hard links created by INSTALL_[R]SYMLINK.
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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 and any object files.
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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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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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ACFLAGS Flags to the compiler when preprocessing and
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assembling .S files.
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AFLAGS Flags to the assembler when assembling .s files.
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BINGRP Binary group.
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BINMODE Binary mode.
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BINOWN Binary owner.
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CFLAGS Flags to the compiler when creating C objects.
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CLEANDIRS Additional files (CLEANFILES) and directories (CLEANDIRS) to
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CLEANFILES remove during clean and cleandir targets. "rm -rf" and
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"rm -f" are used, respectively.
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DIRS A list of variables referring to directories. For example:
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DIRS+= FOO
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FOO= /usr/share/foo
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Owner, Group, Mode and Flags are handled by FOO_OWN,
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FOO_GRP, FOO_MODE and FOO_FLAGS, respectively.
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This allows FILESDIR to be set to FOO, and the directory
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will be created before the files are installed and the
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dependencies will be set correctly.
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DPADD Additional dependencies for the program. Usually used for
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libraries. For example, to depend on the compatibility and
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utility libraries use:
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DPADD=${LIBCOMPAT} ${LIBUTIL}
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There is a predefined identifier for each (non-profiled,
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non-shared) library and object. Library file names are
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transformed to identifiers by removing the extension and
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converting to upper case.
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There are no special identifiers for profiled or shared
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libraries or objects. The identifiers for the standard
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libraries are used in DPADD. This works correctly iff all
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the libraries are built at the same time. Unfortunately,
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it causes unnecessary relinks to shared libraries when
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only the static libraries have changed. Dependencies on
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shared libraries should be only on the library version
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numbers.
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FILES A list of non-executable files.
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The installation is controlled by the FILESNAME, FILESOWN,
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FILESGRP, FILESMODE, FILESDIR variables that can be
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further specialized by FILES<VAR>_<file>.
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LDADD Additional loader objects. Usually used for libraries.
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For example, to load with the compatibility and utility
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libraries, use:
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LDADD=-lutil -lcompat
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LDFLAGS Additional loader flags. Passed to the loader via CC,
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since that's used to link programs as well, so loader
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specific flags need to be prefixed with -Wl, to work.
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LIBADD Additional libraries. This is for base system libraries
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and is only valid inside of the /usr/src tree.
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Use LIBADD=name instead of LDADD=-lname.
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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= /bin/test /bin/[
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LINKOWN Owner of links created with LINKS [${BINOWN}].
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LINKGRP Group of links created with LINKS [${BINGRP}].
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LINKMODE Mode of links created with LINKS [${BINMODE}].
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MAN Manual pages. If no MAN variable is defined,
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"MAN=${PROG}.1" is assumed. See bsd.man.mk for more details.
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PROG The name of the program to build. If not supplied, nothing
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is built.
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PROGNAME The name that the above program will be installed as, if
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different from ${PROG}.
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PROG_CXX If defined, the name of the program to build. Also
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causes <bsd.prog.mk> to link the program with the
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standard C++ library. PROG_CXX overrides the value
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of PROG if PROG is also set.
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PROGS When used with <bsd.progs.mk>, allow building multiple
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PROGS_CXX PROG and PROG_CXX in one Makefile. To define
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individual variables for each program the VAR.prog
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syntax should be used. For example:
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PROGS= foo bar
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SRCS.foo= foo_src.c
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LDADD.foo= -lutil
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SRCS.bar= bar_src.c
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The supported variables are:
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- BINDIR
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- BINGRP
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- BINMODE
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- BINOWN
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- CFLAGS
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- CXXFLAGS
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- DEBUG_FLAGS
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- DPADD
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- DPSRCS
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- INTERNALPROG (no installation)
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- LDADD
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- LDFLAGS
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- LIBADD
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- LINKS
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- MAN
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- MLINKS
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- NO_WERROR
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- PROGNAME
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- SRCS
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- STRIP
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- WARNS
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SCRIPTS A list of interpreter scripts [file.{sh,csh,pl,awk,...}].
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The installation is controlled by the SCRIPTSNAME, SCRIPTSOWN,
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SCRIPTSGRP, SCRIPTSMODE, SCRIPTSDIR variables that can be
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further specialized by SCRIPTS<VAR>_<script>.
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SRCS List of source files to build the program. If SRCS is not
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defined, it's assumed to be ${PROG}.c or, if PROG_CXX is
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defined, ${PROG_CXX}.cc.
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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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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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MAN= foo.2
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If foo does not have a manual page at all, add the line:
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MAN=
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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.snmpmod.mk>, handles building MIB modules for bsnmpd
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from one or more source files, along with their manual pages. It has a
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limited number of suffixes, consistent with the current needs of the BSD
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tree.
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bsd.snmpmod.mk leverages bsd.lib.mk for building MIB modules and
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bsd.files.mk for installing MIB description and definition files.
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It implements the following additional targets:
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smilint:
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execute smilint on the MIBs defined by BMIBS.
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The net-mgmt/libsmi package must be installed before
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executing this target. The net-mgmt/net-snmp package
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should be installed as well to reduce false positives
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from smilint.
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It sets/uses the following variables:
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BMIBS The MIB definitions to install.
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BMIBSDIR The directory where the MIB definitions are installed.
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This defaults to `${SHAREDIR}/snmp/mibs`.
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DEFS The MIB description files to install.
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DEFSDIR The directory where MIB description files are installed.
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This defaults to `${SHAREDIR}/snmp/defs`.
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EXTRAMIBDEFS Extra MIB description files to use as input when
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generating ${MOD}_oid.h and ${MOD}_tree.[ch].
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EXTRAMIBSYMS Extra MIB definition files used only for extracting
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symbols.
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EXTRAMIBSYMS are useful when resolving inter-module
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dependencies and are useful with files containing only
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enum-definitions.
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See ${MOD}_oid.h for more details.
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LOCALBASE The package root where smilint and the net-snmp
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definitions can be found
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MOD The bsnmpd module name.
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SMILINT smilint binary to use with the smilint make target.
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SMILINT_FLAGS flags to pass to smilint.
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SMIPATH A colon-separated directory path where MIBs definitions
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can be found. See "SMIPATH" in smi_config for more
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details.
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XSYM MIB names to extract symbols for. See ${MOD}_oid.h for
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more details.
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It generates the following files:
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${MOD}_tree.c A source file and header which programmatically describes
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${MOD}_tree.h the MIB (type, OID name, ACCESS attributes, etc).
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The files are generated via "gensnmptree -p".
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See gensnmptree(1) for more details.
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${MOD}_oid.h A header which programmatically describes the MIB root and
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MIB tables.
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The files are generated via "gensnmptree -e".
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See gensnmptree(1) for more details.
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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, and tags. For all of the directories listed in the
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variable SUBDIRS, the specified directory will be visited and the target made.
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There is also a default target which allows the command "make subdir" where
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subdir is any directory listed in the variable SUBDIRS.
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.lib.mk> has support for building libraries. It has the
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same seven targets as <bsd.prog.mk>: all, clean, cleandir, depend, install, and
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tags. It has a limited number of suffixes, consistent with the current needs of
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the BSD tree.
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It sets/uses the following variables:
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LDADD Additional loader objects.
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LIB The name of the library to build. Both a shared and static
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library will be built. NO_PIC can be set to only build a
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static library.
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LIBADD Additional libraries. This is for base system libraries
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and is only valid inside of the /usr/src tree.
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Use LIBADD=name instead of LDADD=-lname.
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LIBDIR Target directory for libraries.
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LIBGRP Library group.
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LIBMODE Library mode.
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LIBOWN Library owner.
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LIBRARIES_ONLY Do not build or install files other than the library.
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LIB_CXX The name of the library to build. It also causes
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<bsd.lib.mk> to link the library with the
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standard C++ library. LIB_CXX overrides the value
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of LIB if LIB is also set. Both a shared and static library
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will be built. NO_PIC can be set to only build a static
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library.
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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= /bin/test /bin/[
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LINKOWN Owner of links created with LINKS [${LIBOWN}].
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LINKGRP Group of links created with LINKS [${LIBGRP}].
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LINKMODE Mode of links created with LINKS [${LIBMODE}].
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LINTLIBDIR Target directory for lint libraries.
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MAN The manual pages to be installed. See bsd.man.mk for more
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details.
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SHLIB Like LIB but only builds a shared library.
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SHLIB_CXX Like LIB_CXX but only builds a shared library.
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SHLIB_LDSCRIPT Template file to generate shared library linker script.
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If not defined, a simple symlink is created to the real
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shared object.
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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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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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The include file <bsd.test.mk> handles building one or more test programs
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intended to be used in the FreeBSD Test Suite under /usr/tests/.
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It has seven targets:
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all:
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build the test programs.
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check:
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runs the test programs with kyua test.
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The beforecheck and aftercheck targets will be invoked, if
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defined, to execute commands before and after the realcheck
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target has been executed, respectively.
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The devel/kyua package must be installed before invoking this
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target.
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clean:
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remove the test programs and any object files.
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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 and tags.
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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 test programs and their data files; if the
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Makefile does not itself define the target install, the
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targets beforeinstall and afterinstall may also be used
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to cause actions immediately before and after the
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install target is executed.
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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, among many others:
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ATF_TESTS_C The names of the ATF C test programs to build.
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ATF_TESTS_CXX The names of the ATF C++ test programs to build.
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ATF_TESTS_SH The names of the ATF sh test programs to build.
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KYUAFILE If 'auto' (the default), generate a Kyuafile out of the
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test programs defined in the Makefile. If 'yes', then a
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manually-crafted Kyuafile must be supplied with the
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sources. If 'no', no Kyuafile is installed (useful for
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subdirectories providing helper programs or data files
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only).
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LOCALBASE The --prefix for the kyua package.
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The value of LOCALBASE defaults to /usr/local .
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NOT_FOR_TEST_SUITE
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If defined, none of the built test programs get
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installed under /usr/tests/ and no Kyuafile is
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automatically generated. Should not be used within the
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FreeBSD source tree but is provided for the benefit of
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third-parties.
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PLAIN_TESTS_C The names of the plain (legacy) programs to build.
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PLAIN_TESTS_CXX The names of the plain (legacy) test programs to build.
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PLAIN_TESTS_SH The names of the plain (legacy) test programs to build.
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TAP_PERL_INTERPRETER
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Path to the Perl interpreter to be used for
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TAP-compliant test programs that are written in Perl.
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Refer to TAP_TESTS_PERL for details.
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TAP_TESTS_C The names of the TAP-compliant C test programs to build.
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TAP_TESTS_CXX The names of the TAP-compliant C++ test programs to
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build.
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TAP_TESTS_PERL The names of the TAP-compliant Perl test programs to
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build. The corresponding source files should end with
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the .pl extension; the test program is marked as
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requiring Perl; and TAP_PERL_INTERPRETER is used in the
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built scripts as the interpreter of choice.
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TAP_TESTS_SH The names of the TAP-compliant sh test programs to
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build.
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TESTSBASE Installation prefix for tests. Defaults to /usr/tests
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TESTSDIR Path to the installed tests. Must be a subdirectory of
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TESTSBASE and the subpath should match the relative
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location of the tests within the src tree.
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The value of TESTSDIR defaults to
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${TESTSBASE}/${RELDIR:H} , e.g. /usr/tests/bin/ls when
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included from bin/ls/tests .
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TESTS_SUBDIRS List of subdirectories containing tests into which to
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recurse. Differs from SUBDIR in that these directories
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get registered into the automatically-generated
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Kyuafile (if any).
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The actual building of the test programs is performed by <bsd.prog.mk>.
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Please see the documentation above for this other file for additional
|
|
details on the behavior of <bsd.test.mk>.
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