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* Autoconf / Automake configuration and building.

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Eelco Dolstra 2003-04-04 16:14:56 +00:00
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
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This program is distributed in the hope that it will be useful,
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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Copyright 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software
Foundation, Inc.
This file is free documentation; the Free Software Foundation gives
unlimited permission to copy, distribute and modify it.
Basic Installation
==================
These are generic installation instructions.
The `configure' shell script attempts to guess correct values for
various system-dependent variables used during compilation. It uses
those values to create a `Makefile' in each directory of the package.
It may also create one or more `.h' files containing system-dependent
definitions. Finally, it creates a shell script `config.status' that
you can run in the future to recreate the current configuration, and a
file `config.log' containing compiler output (useful mainly for
debugging `configure').
It can also use an optional file (typically called `config.cache'
and enabled with `--cache-file=config.cache' or simply `-C') that saves
the results of its tests to speed up reconfiguring. (Caching is
disabled by default to prevent problems with accidental use of stale
cache files.)
If you need to do unusual things to compile the package, please try
to figure out how `configure' could check whether to do them, and mail
diffs or instructions to the address given in the `README' so they can
be considered for the next release. If you are using the cache, and at
some point `config.cache' contains results you don't want to keep, you
may remove or edit it.
The file `configure.ac' (or `configure.in') is used to create
`configure' by a program called `autoconf'. You only need
`configure.ac' if you want to change it or regenerate `configure' using
a newer version of `autoconf'.
The simplest way to compile this package is:
1. `cd' to the directory containing the package's source code and type
`./configure' to configure the package for your system. If you're
using `csh' on an old version of System V, you might need to type
`sh ./configure' instead to prevent `csh' from trying to execute
`configure' itself.
Running `configure' takes awhile. While running, it prints some
messages telling which features it is checking for.
2. Type `make' to compile the package.
3. Optionally, type `make check' to run any self-tests that come with
the package.
4. Type `make install' to install the programs and any data files and
documentation.
5. You can remove the program binaries and object files from the
source code directory by typing `make clean'. To also remove the
files that `configure' created (so you can compile the package for
a different kind of computer), type `make distclean'. There is
also a `make maintainer-clean' target, but that is intended mainly
for the package's developers. If you use it, you may have to get
all sorts of other programs in order to regenerate files that came
with the distribution.
Compilers and Options
=====================
Some systems require unusual options for compilation or linking that
the `configure' script does not know about. Run `./configure --help'
for details on some of the pertinent environment variables.
You can give `configure' initial values for configuration parameters
by setting variables in the command line or in the environment. Here
is an example:
./configure CC=c89 CFLAGS=-O2 LIBS=-lposix
*Note Defining Variables::, for more details.
Compiling For Multiple Architectures
====================================
You can compile the package for more than one kind of computer at the
same time, by placing the object files for each architecture in their
own directory. To do this, you must use a version of `make' that
supports the `VPATH' variable, such as GNU `make'. `cd' to the
directory where you want the object files and executables to go and run
the `configure' script. `configure' automatically checks for the
source code in the directory that `configure' is in and in `..'.
If you have to use a `make' that does not support the `VPATH'
variable, you have to compile the package for one architecture at a
time in the source code directory. After you have installed the
package for one architecture, use `make distclean' before reconfiguring
for another architecture.
Installation Names
==================
By default, `make install' will install the package's files in
`/usr/local/bin', `/usr/local/man', etc. You can specify an
installation prefix other than `/usr/local' by giving `configure' the
option `--prefix=PATH'.
You can specify separate installation prefixes for
architecture-specific files and architecture-independent files. If you
give `configure' the option `--exec-prefix=PATH', the package will use
PATH as the prefix for installing programs and libraries.
Documentation and other data files will still use the regular prefix.
In addition, if you use an unusual directory layout you can give
options like `--bindir=PATH' to specify different values for particular
kinds of files. Run `configure --help' for a list of the directories
you can set and what kinds of files go in them.
If the package supports it, you can cause programs to be installed
with an extra prefix or suffix on their names by giving `configure' the
option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
Optional Features
=================
Some packages pay attention to `--enable-FEATURE' options to
`configure', where FEATURE indicates an optional part of the package.
They may also pay attention to `--with-PACKAGE' options, where PACKAGE
is something like `gnu-as' or `x' (for the X Window System). The
`README' should mention any `--enable-' and `--with-' options that the
package recognizes.
For packages that use the X Window System, `configure' can usually
find the X include and library files automatically, but if it doesn't,
you can use the `configure' options `--x-includes=DIR' and
`--x-libraries=DIR' to specify their locations.
Specifying the System Type
==========================
There may be some features `configure' cannot figure out
automatically, but needs to determine by the type of machine the package
will run on. Usually, assuming the package is built to be run on the
_same_ architectures, `configure' can figure that out, but if it prints
a message saying it cannot guess the machine type, give it the
`--build=TYPE' option. TYPE can either be a short name for the system
type, such as `sun4', or a canonical name which has the form:
CPU-COMPANY-SYSTEM
where SYSTEM can have one of these forms:
OS KERNEL-OS
See the file `config.sub' for the possible values of each field. If
`config.sub' isn't included in this package, then this package doesn't
need to know the machine type.
If you are _building_ compiler tools for cross-compiling, you should
use the `--target=TYPE' option to select the type of system they will
produce code for.
If you want to _use_ a cross compiler, that generates code for a
platform different from the build platform, you should specify the
"host" platform (i.e., that on which the generated programs will
eventually be run) with `--host=TYPE'.
Sharing Defaults
================
If you want to set default values for `configure' scripts to share,
you can create a site shell script called `config.site' that gives
default values for variables like `CC', `cache_file', and `prefix'.
`configure' looks for `PREFIX/share/config.site' if it exists, then
`PREFIX/etc/config.site' if it exists. Or, you can set the
`CONFIG_SITE' environment variable to the location of the site script.
A warning: not all `configure' scripts look for a site script.
Defining Variables
==================
Variables not defined in a site shell script can be set in the
environment passed to `configure'. However, some packages may run
configure again during the build, and the customized values of these
variables may be lost. In order to avoid this problem, you should set
them in the `configure' command line, using `VAR=value'. For example:
./configure CC=/usr/local2/bin/gcc
will cause the specified gcc to be used as the C compiler (unless it is
overridden in the site shell script).
`configure' Invocation
======================
`configure' recognizes the following options to control how it
operates.
`--help'
`-h'
Print a summary of the options to `configure', and exit.
`--version'
`-V'
Print the version of Autoconf used to generate the `configure'
script, and exit.
`--cache-file=FILE'
Enable the cache: use and save the results of the tests in FILE,
traditionally `config.cache'. FILE defaults to `/dev/null' to
disable caching.
`--config-cache'
`-C'
Alias for `--cache-file=config.cache'.
`--quiet'
`--silent'
`-q'
Do not print messages saying which checks are being made. To
suppress all normal output, redirect it to `/dev/null' (any error
messages will still be shown).
`--srcdir=DIR'
Look for the package's source code in directory DIR. Usually
`configure' can determine that directory automatically.
`configure' also accepts some other, not widely useful, options. Run
`configure --help' for more details.

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SUBDIRS = src

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AC_INIT(nix, 0.1)
AC_CONFIG_SRCDIR(src/nix.cc)
AC_CONFIG_AUX_DIR(config)
AM_INIT_AUTOMAKE
AC_PREFIX_DEFAULT(/nix)
AC_CANONICAL_HOST
AC_PROG_CC
AC_PROG_CXX
AC_CONFIG_FILES(Makefile src/Makefile src/nix-instantiate)
AC_OUTPUT

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@ -1,21 +0,0 @@
all: nix nix-instantiate
SYSTEM = $(shell ./config.guess)
nix: nix.o md5.o
g++ -g -o $@ $^ -ldb_cxx-4 -lATerm
%.o: %.cc
g++ -g -Wall -o $@ -c $< -DSYSTEM=\"$(SYSTEM)\"
%.o: %.c
gcc -g -Wall -o $@ -c $< -DSYSTEM=\"$(SYSTEM)\"
md5.o: md5.c md5.h
nix-instantiate: nix-instantiate.in
sed "s/@SYSTEM@/$(SYSTEM)/" < $^ > $@
chmod +x $@
clean:
rm -f *.o nix nix-instantiate

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bin_PROGRAMS = nix
nix_SOURCES = nix.cc md5.c
nix_CXXFLAGS = -DSYSTEM=\"@host@\"
nix_LDADD = -ldb_cxx-4 -lATerm

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src/nix-instantiate.in
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@ -5,7 +5,7 @@ use FileHandle;
use File::Spec;
use Digest::MD5;
my $system = "@SYSTEM@";
my $system = "@host@";
my $outdir = File::Spec->rel2abs($ARGV[0]);
my $netdir = File::Spec->rel2abs($ARGV[1]);

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src/nix-regprebuilts
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@ -1,6 +1,6 @@
#! /usr/bin/perl -w
my $dir = $ENV{"NIX"} . "/prebuilts";
my $dir = $ARGV[0];
foreach my $prebuilt (glob("$dir/*.tar.bz2")) {

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src/nix.cc
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@ -24,53 +24,25 @@ extern "C" {
#include "md5.h"
}
#include "util.hh"
using namespace std;
#define PKGINFO_ENVVAR "NIX_DB"
#define PKGINFO_PATH "/pkg/sys/var/pkginfo"
#define PKGHOME_ENVVAR "NIX_PKGHOME"
/* Database names. */
static string dbRefs = "refs";
static string dbInstPkgs = "pkginst";
static string dbPrebuilts = "prebuilts";
static string prog;
static string dbfile = PKGINFO_PATH;
static string pkgHome = "/pkg";
/* The canonical system name, as returned by config.guess. */
static string thisSystem = SYSTEM;
class Error : public exception
{
string err;
public:
Error(string _err) { err = _err; }
~Error() throw () { };
const char * what() const throw () { return err.c_str(); }
};
class UsageError : public Error
{
public:
UsageError(string _err) : Error(_err) { };
};
class BadRefError : public Error
{
public:
BadRefError(string _err) : Error(_err) { };
};
typedef vector<string> Strings;
/* The prefix of the Nix installation, and the environment variable
that can be used to override the default. */
static string nixHomeDir = "/nix";
static string nixHomeDirEnvVar = "NIX";
/* Wrapper classes that ensures that the database is closed upon
@ -98,7 +70,7 @@ auto_ptr<Db2> openDB(const string & dbname, bool readonly)
db = auto_ptr<Db2>(new Db2(0, 0));
db->open(dbfile.c_str(), dbname.c_str(),
db->open((nixHomeDir + "/var/nix/pkginfo.db").c_str(), dbname.c_str(),
DB_HASH, readonly ? DB_RDONLY : DB_CREATE, 0666);
return db;
@ -336,7 +308,7 @@ void installPkg(string hash)
string id = getFromEnv(env, "id");
/* Construct a path for the installed package. */
path = pkgHome + "/" + id + "-" + hash;
path = nixHomeDir + "/pkg/" + id + "-" + hash;
/* Create the path. */
if (mkdir(path.c_str(), 0777))
@ -767,11 +739,8 @@ void run(Strings::iterator argCur, Strings::iterator argEnd)
{
umask(0022);
if (getenv(PKGINFO_ENVVAR))
dbfile = getenv(PKGINFO_ENVVAR);
if (getenv(PKGHOME_ENVVAR))
pkgHome = getenv(PKGHOME_ENVVAR);
char * homeDir = getenv(nixHomeDirEnvVar.c_str());
if (homeDir) nixHomeDir = homeDir;
/* Parse the global flags. */
for ( ; argCur != argEnd; argCur++) {
@ -779,8 +748,6 @@ void run(Strings::iterator argCur, Strings::iterator argEnd)
if (arg == "-h" || arg == "--help") {
printUsage();
return;
} else if (arg == "-d") {
dbfile = optarg;
} else if (arg[0] == '-') {
throw UsageError("invalid option `" + arg + "'");
} else break;
@ -848,7 +815,7 @@ int main(int argc, char * * argv)
while (argc--) args.push_back(*argv++);
Strings::iterator argCur = args.begin(), argEnd = args.end();
prog = *argCur++;
argCur++;
try {
try {

34
src/util.hh Normal file
View file

@ -0,0 +1,34 @@
#ifndef __UTIL_H
#define __UTIL_H
#include <vector>
using namespace std;
class Error : public exception
{
string err;
public:
Error(string _err) { err = _err; }
~Error() throw () { };
const char * what() const throw () { return err.c_str(); }
};
class UsageError : public Error
{
public:
UsageError(string _err) : Error(_err) { };
};
class BadRefError : public Error
{
public:
BadRefError(string _err) : Error(_err) { };
};
typedef vector<string> Strings;
#endif /* !__UTIL_H */