make-stds.texi

基于4个mips核的noc设计

commands and @dfn{post-installation} commands.  @xref{Install Command
Categories}.

@item uninstall
Delete all the installed files---the copies that the @samp{install}
target creates.

This rule should not modify the directories where compilation is done,
only the directories where files are installed.

The uninstallation commands are divided into three categories, just like
the installation commands.  @xref{Install Command Categories}.

@item install-strip
Like @code{install}, but strip the executable files while installing
them.  In many cases, the definition of this target can be very simple:

@smallexample
install-strip:
        $(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' \
                install
@end smallexample

Normally we do not recommend stripping an executable unless you are sure
the program has no bugs.  However, it can be reasonable to install a
stripped executable for actual execution while saving the unstripped
executable elsewhere in case there is a bug.

@comment The gratuitous blank line here is to make the table look better
@comment in the printed Make manual.  Please leave it in.
@item clean

Delete all files from the current directory that are normally created by
building the program.  Don't delete the files that record the
configuration.  Also preserve files that could be made by building, but
normally aren't because the distribution comes with them.

Delete @file{.dvi} files here if they are not part of the distribution.

@item distclean
Delete all files from the current directory that are created by
configuring or building the program.  If you have unpacked the source
and built the program without creating any other files, @samp{make
distclean} should leave only the files that were in the distribution.

@item mostlyclean
Like @samp{clean}, but may refrain from deleting a few files that people
normally don't want to recompile.  For example, the @samp{mostlyclean}
target for GCC does not delete @file{libgcc.a}, because recompiling it
is rarely necessary and takes a lot of time.

@item maintainer-clean
Delete almost everything from the current directory that can be
reconstructed with this Makefile.  This typically includes everything
deleted by @code{distclean}, plus more: C source files produced by
Bison, tags tables, Info files, and so on.

The reason we say ``almost everything'' is that running the command
@samp{make maintainer-clean} should not delete @file{configure} even if
@file{configure} can be remade using a rule in the Makefile.  More generally,
@samp{make maintainer-clean} should not delete anything that needs to
exist in order to run @file{configure} and then begin to build the
program.  This is the only exception; @code{maintainer-clean} should
delete everything else that can be rebuilt.

The @samp{maintainer-clean} target is intended to be used by a maintainer of
the package, not by ordinary users.  You may need special tools to
reconstruct some of the files that @samp{make maintainer-clean} deletes.
Since these files are normally included in the distribution, we don't
take care to make them easy to reconstruct.  If you find you need to
unpack the full distribution again, don't blame us.

To help make users aware of this, the commands for the special
@code{maintainer-clean} target should start with these two:

@smallexample
@@echo 'This command is intended for maintainers to use; it'
@@echo 'deletes files that may need special tools to rebuild.'
@end smallexample

@item TAGS
Update a tags table for this program.
@c ADR: how?

@item info
Generate any Info files needed.  The best way to write the rules is as
follows:

@smallexample
info: foo.info

foo.info: foo.texi chap1.texi chap2.texi
        $(MAKEINFO) $(srcdir)/foo.texi
@end smallexample

@noindent
You must define the variable @code{MAKEINFO} in the Makefile.  It should
run the @code{makeinfo} program, which is part of the Texinfo
distribution.

Normally a GNU distribution comes with Info files, and that means the
Info files are present in the source directory.  Therefore, the Make
rule for an info file should update it in the source directory.  When
users build the package, ordinarily Make will not update the Info files
because they will already be up to date.

@item dvi
Generate DVI files for all Texinfo documentation.
For example:

@smallexample
dvi: foo.dvi

foo.dvi: foo.texi chap1.texi chap2.texi
        $(TEXI2DVI) $(srcdir)/foo.texi
@end smallexample

@noindent
You must define the variable @code{TEXI2DVI} in the Makefile.  It should
run the program @code{texi2dvi}, which is part of the Texinfo
distribution.@footnote{@code{texi2dvi} uses @TeX{} to do the real work
of formatting. @TeX{} is not distributed with Texinfo.}  Alternatively,
write just the dependencies, and allow GNU @code{make} to provide the command.

@item dist
Create a distribution tar file for this program.  The tar file should be
set up so that the file names in the tar file start with a subdirectory
name which is the name of the package it is a distribution for.  This
name can include the version number.

For example, the distribution tar file of GCC version 1.40 unpacks into
a subdirectory named @file{gcc-1.40}.

The easiest way to do this is to create a subdirectory appropriately
named, use @code{ln} or @code{cp} to install the proper files in it, and
then @code{tar} that subdirectory.

Compress the tar file file with @code{gzip}.  For example, the actual
distribution file for GCC version 1.40 is called @file{gcc-1.40.tar.gz}.

The @code{dist} target should explicitly depend on all non-source files
that are in the distribution, to make sure they are up to date in the
distribution.
@ifset CODESTD
@xref{Releases, , Making Releases}.
@end ifset
@ifclear CODESTD
@xref{Releases, , Making Releases, standards, GNU Coding Standards}.
@end ifclear

@item check
Perform self-tests (if any).  The user must build the program before
running the tests, but need not install the program; you should write
the self-tests so that they work when the program is built but not
installed.
@end table

The following targets are suggested as conventional names, for programs
in which they are useful.

@table @code
@item installcheck
Perform installation tests (if any).  The user must build and install
the program before running the tests.  You should not assume that
@file{$(bindir)} is in the search path.

@item installdirs
It's useful to add a target named @samp{installdirs} to create the
directories where files are installed, and their parent directories.
There is a script called @file{mkinstalldirs} which is convenient for
this; you can find it in the Texinfo package.
@c It's in /gd/gnu/lib/mkinstalldirs.
You can use a rule like this:

@comment This has been carefully formatted to look decent in the Make manual.
@comment Please be sure not to make it extend any further to the right.--roland
@smallexample
# Make sure all installation directories (e.g. $(bindir))
# actually exist by making them if necessary.
installdirs: mkinstalldirs
        $(srcdir)/mkinstalldirs $(bindir) $(datadir) \
                                $(libdir) $(infodir) \
                                $(mandir)
@end smallexample

This rule should not modify the directories where compilation is done.
It should do nothing but create installation directories.
@end table

@node Install Command Categories
@section Install Command Categories

@cindex pre-installation commands
@cindex post-installation commands
When writing the @code{install} target, you must classify all the
commands into three categories: normal ones, @dfn{pre-installation}
commands and @dfn{post-installation} commands.

Normal commands move files into their proper places, and set their
modes.  They may not alter any files except the ones that come entirely
from the package they belong to.

Pre-installation and post-installation commands may alter other files;
in particular, they can edit global configuration files or data bases.

Pre-installation commands are typically executed before the normal
commands, and post-installation commands are typically run after the
normal commands.

The most common use for a post-installation command is to run
@code{install-info}.  This cannot be done with a normal command, since
it alters a file (the Info directory) which does not come entirely and
solely from the package being installed.  It is a post-installation
command because it needs to be done after the normal command which
installs the package's Info files.

Most programs don't need any pre-installation commands, but we have the
feature just in case it is needed.

To classify the commands in the @code{install} rule into these three
categories, insert @dfn{category lines} among them.  A category line
specifies the category for the commands that follow.

A category line consists of a tab and a reference to a special Make
variable, plus an optional comment at the end.  There are three
variables you can use, one for each category; the variable name
specifies the category.  Category lines are no-ops in ordinary execution
because these three Make variables are normally undefined (and you
@emph{should not} define them in the makefile).

Here are the three possible category lines, each with a comment that
explains what it means:

@smallexample
        $(PRE_INSTALL)     # @r{Pre-install commands follow.}
        $(POST_INSTALL)    # @r{Post-install commands follow.}
        $(NORMAL_INSTALL)  # @r{Normal commands follow.}
@end smallexample

If you don't use a category line at the beginning of the @code{install}
rule, all the commands are classified as normal until the first category
line.  If you don't use any category lines, all the commands are
classified as normal.

These are the category lines for @code{uninstall}:

@smallexample
        $(PRE_UNINSTALL)     # @r{Pre-uninstall commands follow.}
        $(POST_UNINSTALL)    # @r{Post-uninstall commands follow.}
        $(NORMAL_UNINSTALL)  # @r{Normal commands follow.}
@end smallexample

Typically, a pre-uninstall command would be used for deleting entries
from the Info directory.

If the @code{install} or @code{uninstall} target has any dependencies
which act as subroutines of installation, then you should start
@emph{each} dependency's commands with a category line, and start the
main target's commands with a category line also.  This way, you can
ensure that each command is placed in the right category regardless of
which of the dependencies actually run.

Pre-installation and post-installation commands should not run any
programs except for these:

@example
[ basename bash cat chgrp chmod chown cmp cp dd diff echo
egrep expand expr false fgrep find getopt grep gunzip gzip
hostname install install-info kill ldconfig ln ls md5sum
mkdir mkfifo mknod mv printenv pwd rm rmdir sed sort tee
test touch true uname xargs yes
@end example

@cindex binary packages
The reason for distinguishing the commands in this way is for the sake
of making binary packages.  Typically a binary package contains all the
executables and other files that need to be installed, and has its own
method of installing them---so it does not need to run the normal
installation commands.  But installing the binary package does need to
execute the pre-installation and post-installation commands.

Programs to build binary packages work by extracting the
pre-installation and post-installation commands.  Here is one way of
extracting the pre-installation commands:

@smallexample
make -n install -o all \
      PRE_INSTALL=pre-install \
      POST_INSTALL=post-install \
      NORMAL_INSTALL=normal-install \
  | gawk -f pre-install.awk
@end smallexample

@noindent
where the file @file{pre-install.awk} could contain this:

@smallexample
$0 ~ /^\t[ \t]*(normal_install|post_install)[ \t]*$/ @{on = 0@}
on @{print $0@}
$0 ~ /^\t[ \t]*pre_install[ \t]*$/ @{on = 1@}
@end smallexample

The resulting file of pre-installation commands is executed as a shell
script as part of installing the binary package.