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GNU Coding Standards

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7.2.5 Standard Targets for Users

All GNU programs should have the following targets in their Makefiles:

`all'
Compile the entire program. This should be the default target. This target need not rebuild any documentation files; Info files should normally be included in the distribution, and DVI files should be made only when explicitly asked for.

By default, the Make rules should compile and link with `-g', so that executable programs have debugging symbols. Users who don't mind being helpless can strip the executables later if they wish.

`install'
Compile the program and copy the executables, libraries, and so on to the file names where they should reside for actual use. If there is a simple test to verify that a program is properly installed, this target should run that test.

Do not strip executables when installing them. Devil-may-care users can use the install-strip target to do that.

If possible, write the install target rule so that it does not modify anything in the directory where the program was built, provided `make all' has just been done. This is convenient for building the program under one user name and installing it under another.

The commands should create all the directories in which files are to be installed, if they don't already exist. This includes the directories specified as the values of the variables prefix and exec_prefix, as well as all subdirectories that are needed. One way to do this is by means of an installdirs target as described below.

Use `-' before any command for installing a man page, so that make will ignore any errors. This is in case there are systems that don't have the Unix man page documentation system installed.

The way to install Info files is to copy them into `$(infodir)' with $(INSTALL_DATA) (see section 7.2.3 Variables for Specifying Commands), and then run the install-info program if it is present. install-info is a program that edits the Info `dir' file to add or update the menu entry for the given Info file; it is part of the Texinfo package. Here is a sample rule to install an Info file:

 
$(DESTDIR)$(infodir)/foo.info: foo.info
        $(POST_INSTALL)
# There may be a newer info file in . than in srcdir.
        -if test -f foo.info; then d=.; \
         else d=$(srcdir); fi; \
        $(INSTALL_DATA) $$d/foo.info $(DESTDIR)$@; \
# Run install-info only if it exists.
# Use `if' instead of just prepending `-' to the
# line so we notice real errors from install-info.
# We use `$(SHELL) -c' because some shells do not
# fail gracefully when there is an unknown command.
        if $(SHELL) -c 'install-info --version' \
           >/dev/null 2>&1; then \
          install-info --dir-file=$(DESTDIR)$(infodir)/dir \
                       $(DESTDIR)$(infodir)/foo.info; \
        else true; fi

When writing the install target, you must classify all the commands into three categories: normal ones, pre-installation commands and post-installation commands. See section 7.2.6 Install Command Categories.

`uninstall'
Delete all the installed files--the copies that the `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. See section 7.2.6 Install Command Categories.

`install-strip'
Like install, but strip the executable files while installing them. In simple cases, this target can use the install target in a simple way:

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

But if the package installs scripts as well as real executables, the install-strip target can't just refer to the install target; it has to strip the executables but not the scripts.

install-strip should not strip the executables in the build directory which are being copied for installation. It should only strip the copies that are installed.

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.

`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 `.dvi' files here if they are not part of the distribution.

`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, `make distclean' should leave only the files that were in the distribution.

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

`maintainer-clean'
Delete almost everything from the current directory that can be reconstructed with this Makefile. This typically includes everything deleted by 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 `make maintainer-clean' should not delete `configure' even if `configure' can be remade using a rule in the Makefile. More generally, `make maintainer-clean' should not delete anything that needs to exist in order to run `configure' and then begin to build the program. This is the only exception; maintainer-clean should delete everything else that can be rebuilt.

The `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 `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 maintainer-clean target should start with these two:

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

`TAGS'
Update a tags table for this program.

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

 
info: foo.info

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

You must define the variable MAKEINFO in the Makefile. It should run the 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.

`dvi'
Generate DVI files for all Texinfo documentation. For example:

 
dvi: foo.dvi

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

You must define the variable TEXI2DVI in the Makefile. It should run the program texi2dvi, which is part of the Texinfo distribution.(1) Alternatively, write just the dependencies, and allow GNU make to provide the command.

`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 `gcc-1.40'.

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

Compress the tar file with gzip. For example, the actual distribution file for GCC version 1.40 is called `gcc-1.40.tar.gz'.

The 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. See section Making Releases.

`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.

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

installcheck
Perform installation tests (if any). The user must build and install the program before running the tests. You should not assume that `$(bindir)' is in the search path.

installdirs
It's useful to add a target named `installdirs' to create the directories where files are installed, and their parent directories. There is a script called `mkinstalldirs' which is convenient for this; you can find it in the Texinfo package. You can use a rule like this:

 
# Make sure all installation directories (e.g. $(bindir))
# actually exist by making them if necessary.
installdirs: mkinstalldirs
        $(srcdir)/mkinstalldirs $(bindir) $(datadir) \
                                $(libdir) $(infodir) \
                                $(mandir)

or, if you wish to support DESTDIR,

 
# Make sure all installation directories (e.g. $(bindir))
# actually exist by making them if necessary.
installdirs: mkinstalldirs
        $(srcdir)/mkinstalldirs \
            $(DESTDIR)$(bindir) $(DESTDIR)$(datadir) \
            $(DESTDIR)$(libdir) $(DESTDIR)$(infodir) \
            $(DESTDIR)$(mandir)

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


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