Configure autotools to use foreign options
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8
AUTHORS
8
AUTHORS
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# This is the list of [Project Name]'s significant contributors.
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#
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# This does not necessarily list everyone who has contributed code,
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# especially since many employees of one corporation may be contributing.
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# To see the full list of contributors, see the revision history in
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# source control.
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Z. Charles Dziura
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365
INSTALL
365
INSTALL
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Installation Instructions
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*************************
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Basic Installation
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==================
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The following shell commands:
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test -f configure || ./bootstrap
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./configure
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make
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make install
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should configure, build, and install this package. The first line,
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which bootstraps, is intended for developers; when building from
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distribution tarballs it does nothing and can be skipped.
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The following more-detailed instructions are generic; see the
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‘README’ file for instructions specific to this package. Some packages
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provide this ‘INSTALL’ file but do not implement all of the features
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documented below. The lack of an optional feature in a given package is
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not necessarily a bug. More recommendations for GNU packages can be
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found in the GNU Coding Standards.
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Many packages have scripts meant for developers instead of ordinary
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builders, as they may use developer tools that are less commonly
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installed, or they may access the network, which has privacy
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implications. If the ‘bootstrap’ shell script exists, it attempts to
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build the ‘configure’ shell script and related files, possibly using
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developer tools or the network. Because the output of ‘bootstrap’ is
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system-independent, it is normally run by a package developer so that
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its output can be put into the distribution tarball and ordinary
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builders and users need not run ‘bootstrap’. Some packages have
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commands like ‘./autopull.sh’ and ‘./autogen.sh’ that you can run
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instead of ‘./bootstrap’, for more fine-grained control over
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bootstrapping.
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The ‘configure’ shell script attempts to guess correct values for
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various system-dependent variables used during compilation. It uses
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those values to create a ‘Makefile’ in each directory of the package.
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It may also create one or more ‘.h’ files containing system-dependent
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definitions. Finally, it creates a shell script ‘config.status’ that
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you can run in the future to recreate the current configuration, and a
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file ‘config.log’ containing output useful for debugging ‘configure’.
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It can also use an optional file (typically called ‘config.cache’ and
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enabled with ‘--cache-file=config.cache’ or simply ‘-C’) that saves the
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results of its tests to speed up reconfiguring. Caching is disabled by
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default to prevent problems with accidental use of stale cache files.
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If you need to do unusual things to compile the package, please try
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to figure out how ‘configure’ could check whether to do them, and mail
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diffs or instructions to the address given in the ‘README’ so they can
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be considered for the next release. If you are using the cache, and at
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some point ‘config.cache’ contains results you don’t want to keep, you
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may remove or edit it.
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The ‘autoconf’ program generates ‘configure’ from the file
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‘configure.ac’. Normally you should edit ‘configure.ac’ instead of
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editing ‘configure’ directly.
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The simplest way to compile this package is:
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1. ‘cd’ to the directory containing the package’s source code.
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2. If this is a developer checkout and file ‘configure’ does not yet
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exist, type ‘./bootstrap’ to create it. You may need special
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developer tools and network access to bootstrap, and the network
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access may have privacy implications.
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3. Type ‘./configure’ to configure the package for your system. This
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might take a while. While running, ‘configure’ prints messages
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telling which features it is checking for.
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4. Type ‘make’ to compile the package.
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5. Optionally, type ‘make check’ to run any self-tests that come with
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the package, generally using the just-built uninstalled binaries.
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6. Type ‘make install’ to install the programs and any data files and
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documentation. When installing into a prefix owned by root, it is
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recommended that the package be configured and built as a regular
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user, and only the ‘make install’ phase executed with root
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privileges.
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7. Optionally, type ‘make installcheck’ to repeat any self-tests, but
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this time using the binaries in their final installed location.
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This target does not install anything. Running this target as a
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regular user, particularly if the prior ‘make install’ required
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root privileges, verifies that the installation completed
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correctly.
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8. You can remove the program binaries and object files from the
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source code directory by typing ‘make clean’. To also remove the
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files that ‘configure’ created (so you can compile the package for
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a different kind of computer), type ‘make distclean’. There is
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also a ‘make maintainer-clean’ target, but that is intended mainly
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for the package’s developers. If you use it, you may have to
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bootstrap again.
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9. If the package follows the GNU Coding Standards, you can type ‘make
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uninstall’ to remove the installed files.
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Compilers and Options
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=====================
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Some systems require unusual options for compilation or linking that
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the ‘configure’ script does not know about. Run ‘./configure --help’
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for details on some of the pertinent environment variables.
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You can give ‘configure’ initial values for configuration parameters
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by setting variables in the command line or in the environment. Here is
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an example:
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./configure CC=gcc CFLAGS=-g LIBS=-lposix
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See “Defining Variables” for more details.
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Compiling For Multiple Architectures
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====================================
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You can compile the package for more than one kind of computer at the
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same time, by placing the object files for each system in their own
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directory. To do this, you can use GNU ‘make’. ‘cd’ to the directory
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where you want the object files and executables to go and run the
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‘configure’ script. ‘configure’ automatically checks for the source
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code in the directory that ‘configure’ is in and in ‘..’. This is known
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as a “VPATH” build.
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With a non-GNU ‘make’, it is safer to compile the package for one
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system at a time in the source code directory. After you have installed
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the package for one system, use ‘make distclean’ before reconfiguring
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for another system.
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Some platforms, notably macOS, support “fat” or “universal” binaries,
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where a single binary can execute on different architectures. On these
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platforms you can configure and compile just once, with options specific
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to that platform.
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Installation Names
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==================
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By default, ‘make install’ installs the package’s commands under
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‘/usr/local/bin’, include files under ‘/usr/local/include’, etc. You
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can specify an installation prefix other than ‘/usr/local’ by giving
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‘configure’ the option ‘--prefix=PREFIX’, where PREFIX must be an
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absolute file name.
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You can specify separate installation prefixes for
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architecture-specific files and architecture-independent files. If you
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pass the option ‘--exec-prefix=PREFIX’ to ‘configure’, the package uses
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PREFIX as the prefix for installing programs and libraries.
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Documentation and other data files still use the regular prefix.
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In addition, if you use an unusual directory layout you can give
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options like ‘--bindir=DIR’ to specify different values for particular
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kinds of files. Run ‘configure --help’ for a list of the directories
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you can set and what kinds of files go in them. In general, the default
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for these options is expressed in terms of ‘${prefix}’, so that
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specifying just ‘--prefix’ will affect all of the other directory
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specifications that were not explicitly provided.
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The most portable way to affect installation locations is to pass the
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correct locations to ‘configure’; however, many packages provide one or
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both of the following shortcuts of passing variable assignments to the
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‘make install’ command line to change installation locations without
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having to reconfigure or recompile.
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The first method involves providing an override variable for each
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affected directory. For example, ‘make install
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prefix=/alternate/directory’ will choose an alternate location for all
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directory configuration variables that were expressed in terms of
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‘${prefix}’. Any directories that were specified during ‘configure’,
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but not in terms of ‘${prefix}’, must each be overridden at install time
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for the entire installation to be relocated. The approach of makefile
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variable overrides for each directory variable is required by the GNU
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Coding Standards, and ideally causes no recompilation. However, some
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platforms have known limitations with the semantics of shared libraries
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that end up requiring recompilation when using this method, particularly
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noticeable in packages that use GNU Libtool.
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The second method involves providing the ‘DESTDIR’ variable. For
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example, ‘make install DESTDIR=/alternate/directory’ will prepend
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‘/alternate/directory’ before all installation names. The approach of
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‘DESTDIR’ overrides is not required by the GNU Coding Standards, and
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does not work on platforms that have drive letters. On the other hand,
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it does better at avoiding recompilation issues, and works well even
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when some directory options were not specified in terms of ‘${prefix}’
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at ‘configure’ time.
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Optional Features
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=================
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If the package supports it, you can cause programs to be installed
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with an extra prefix or suffix on their names by giving ‘configure’ the
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option ‘--program-prefix=PREFIX’ or ‘--program-suffix=SUFFIX’.
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Some packages pay attention to ‘--enable-FEATURE’ and
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‘--disable-FEATURE’ options to ‘configure’, where FEATURE indicates an
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optional part of the package. They may also pay attention to
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‘--with-PACKAGE’ and ‘--without-PACKAGE’ options, where PACKAGE is
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something like ‘gnu-ld’. ‘./configure --help’ should mention the
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‘--enable-...’ and ‘--with-...’ options that the package recognizes.
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Some packages offer the ability to configure how verbose the
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execution of ‘make’ will be. For these packages, running ‘./configure
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--enable-silent-rules’ sets the default to minimal output, which can be
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overridden with ‘make V=1’; while running ‘./configure
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--disable-silent-rules’ sets the default to verbose, which can be
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overridden with ‘make V=0’.
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Specifying a System Type
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========================
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By default ‘configure’ builds for the current system. To create
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binaries that can run on a different system type, specify a
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‘--host=TYPE’ option along with compiler variables that specify how to
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generate object code for TYPE. For example, to create binaries intended
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to run on a 64-bit ARM processor:
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./configure --host=aarch64-linux-gnu \
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CC=aarch64-linux-gnu-gcc \
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CXX=aarch64-linux-gnu-g++
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If done on a machine that can execute these binaries (e.g., via
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‘qemu-aarch64’, ‘$QEMU_LD_PREFIX’, and Linux’s ‘binfmt_misc’
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capability), the build behaves like a native build. Otherwise it is a
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cross-build: ‘configure’ will make cross-compilation guesses instead of
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running test programs, and ‘make check’ will not work.
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A system type can either be a short name like ‘mingw64’, or a
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canonical name like ‘x86_64-pc-linux-gnu’. Canonical names have the
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form CPU-COMPANY-SYSTEM where SYSTEM is either OS or KERNEL-OS. To
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canonicalize and validate a system type, you can run the command
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‘config.sub’, which is often squirreled away in a subdirectory like
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‘build-aux’. For example:
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$ build-aux/config.sub arm64-linux
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aarch64-unknown-linux-gnu
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$ build-aux/config.sub riscv-lnx
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Invalid configuration 'riscv-lnx': OS 'lnx' not recognized
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You can look at the ‘config.sub’ file to see which types are recognized.
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If the file is absent, this package does not need the system type.
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If ‘configure’ fails with the diagnostic “cannot guess build type”.
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‘config.sub’ did not recognize your system’s type. In this case, first
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fetch the newest versions of these files from the GNU config package
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(https://savannah.gnu.org/projects/config). If that fixes things,
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please report it to the maintainers of the package containing
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‘configure’. Otherwise, you can try the configure option ‘--build=TYPE’
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where TYPE comes close to your system type; also, please report the
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problem to <config-patches@gnu.org>.
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For more details about configuring system types, see the Autoconf
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documentation.
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Sharing Defaults
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================
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If you want to set default values for ‘configure’ scripts to share,
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you can create a site shell script called ‘config.site’ that gives
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default values for variables like ‘CC’, ‘cache_file’, and ‘prefix’.
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‘configure’ looks for ‘PREFIX/share/config.site’ if it exists, then
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‘PREFIX/etc/config.site’ if it exists. Or, you can set the
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‘CONFIG_SITE’ environment variable to the location of the site script.
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A warning: not all ‘configure’ scripts look for a site script.
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Defining Variables
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==================
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Variables not defined in a site shell script can be set in the
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environment passed to ‘configure’. However, some packages may run
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configure again during the build, and the customized values of these
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variables may be lost. In order to avoid this problem, you should set
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them in the ‘configure’ command line, using ‘VAR=value’. For example:
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./configure CC=/usr/local2/bin/gcc
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causes the specified ‘gcc’ to be used as the C compiler (unless it is
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overridden in the site shell script).
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Unfortunately, this technique does not work for ‘CONFIG_SHELL’ due to an
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Autoconf limitation. Until the limitation is lifted, you can use this
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workaround:
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CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
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‘configure’ Invocation
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======================
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‘configure’ recognizes the following options to control how it
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operates.
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‘--help’
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‘-h’
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Print a summary of all of the options to ‘configure’, and exit.
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‘--help=short’
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‘--help=recursive’
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Print a summary of the options unique to this package’s
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‘configure’, and exit. The ‘short’ variant lists options used only
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in the top level, while the ‘recursive’ variant lists options also
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present in any nested packages.
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‘--version’
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‘-V’
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Print the version of Autoconf used to generate the ‘configure’
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script, and exit.
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‘--cache-file=FILE’
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Enable the cache: use and save the results of the tests in FILE,
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traditionally ‘config.cache’. FILE defaults to ‘/dev/null’ to
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disable caching.
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‘--config-cache’
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‘-C’
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Alias for ‘--cache-file=config.cache’.
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‘--srcdir=DIR’
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Look for the package’s source code in directory DIR. Usually
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‘configure’ can determine that directory automatically.
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‘--prefix=DIR’
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Use DIR as the installation prefix. See “Installation Names” for
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more details, including other options available for fine-tuning the
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installation locations.
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‘--host=TYPE’
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Build binaries for system TYPE. See “Specifying a System Type”.
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‘--enable-FEATURE’
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‘--disable-FEATURE’
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Enable or disable the optional FEATURE. See “Optional Features”.
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‘--with-PACKAGE’
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‘--without-PACKAGE’
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Use or omit PACKAGE when building. See “Optional Features”.
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‘--quiet’
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‘--silent’
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‘-q’
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Do not print messages saying which checks are being made. To
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suppress all normal output, redirect it to ‘/dev/null’ (any error
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messages will still be shown).
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‘--no-create’
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‘-n’
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Run the configure checks, but stop before creating any output
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files.
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‘configure’ also recognizes several environment variables, and accepts
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some other, less widely useful, options. Run ‘configure --help’ for
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more details.
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Copyright notice
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================
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Copyright © 1994–1996, 1999–2002, 2004–2017, 2020–2024 Free Software
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Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved. This file is offered as-is,
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without warranty of any kind.
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0
NEWS
0
NEWS
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AC_INIT([fckgw], [1.0])
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AC_INIT([fckgw],[1.0])
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AC_CONFIG_SRCDIR([src/main.c])
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AM_INIT_AUTOMAKE
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AM_INIT_AUTOMAKE([-Wall -Werror foreign])
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AC_PROG_CC
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CFLAGS="$CFLAGS -std=c17"
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AC_CONFIG_FILES([Makefile src/Makefile])
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AC_OUTPUT
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6
configure.ac~
Normal file
6
configure.ac~
Normal file
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AC_INIT([fckgw], [1.0])
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AC_CONFIG_SRCDIR([src/main.c])
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AM_INIT_AUTOMAKE([-Wall -Wextra -Werror foreign])
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AC_PROG_CC_STDC
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AC_CONFIG_FILES([Makefile src/Makefile])
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AC_OUTPUT
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5626
configure~
Executable file
5626
configure~
Executable file
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