This is a port of isl library 0.20  to MSDOS/DJGPP.

  isl is a library for manipulating sets and relations of integer points
  bounded by linear constraints. Supported operations on sets include
  intersection, union, set difference, emptiness check, convex hull, (integer)
  affine hull, integer projection, computing the lexicographic minimum using
  parametric integer programming, coalescing and parametric vertex enumeration.
  It also includes an ILP solver based on generalized basis reduction,
  transitive closures on maps (which may encode infinite graphs), dependence
  analysis and bounds on piecewise step-polynomials.



1.:     DJGPP specific changes.
        =======================

        This port has been configured using DJGPP 2.05.  It has been configured
        to be build in the "_build" directory under the top srcdir.

        The port has been configured and compiled on WinXP SP3 and Win98SE.
        There is no guarantee that this may be possible with any other DOS-
        like OS.  Due to the use of long file names it will not be possible
        to configure and compile without LFN support.

        The port has been compiled using gcc346b and bnu227b.

        To configure, compile and to use this port it is necessary to install
        the GMP library port available as:
          ftp://ftp.delorie.com/pub/djgpp/current/v2gnu/gmp612b.zip

        To build this port and run the testsuite you will need LFN support.

        As usual, all djgpp specific files (config.bat, diffs, README files,
        etc.) are stored in the /djgpp directory.

        For further information about isl library please read the info docs and NEWS file.


2.:     Installing the binary package.
        ==============================

2.1.:   Copy the binary distribution into the top DJGPP installation directory,
        just unzip it preserving the directory structure running *ONE* of the
        following commands:
          unzip32 isl020b.zip      or
          djtarx isl020b.zip       or
          pkunzip -d isl020b.zip


3.:     Building the binaries from sources.
        ===================================

3.1.:   Create a temporary directory and copy the source package into the
        directory.  If you download the source distribution from one of the
        DJGPP sites, just unzip it preserving the directory structure
        running *ONE* of the following commands:
          unzip32 isl020s.zip      or
          djtarx isl020s.zip       or
          pkunzip -d isl020s.zip

3.2.:   To build the binaries you will need the following binary packages:
          djdev205.zip (or a later but NOT a prior version)
          bsh205bbr3.zip (or a later but NOT a prior version)
          gccNNNb.zip, gppNNN.zip, bnuNNNb.zip, makNNNb.zip, filNNNb.zip,
          shlNNNb.zip, txtNNNb.zip, txiNNNb.zip, grepNNNb.zip, sedNNNb.zip,
          pcreNNNb.zip, mktmpNNb.zip and gwkNNNb.zip.

        If you want to configure and compile this packages with NLS support
        enabled you must install licvNNNb.zip, lunsNNNb.zip and gtxNNNNb.zip.

        If you want to run the check you will need also:
          difNNNb.zip and mktmpNNNb.zip

        NNN represents the latest version number of the binary packages.  All
        this packages can be found in the /v2gnu directory of any
        ftp.delorie.com mirror.
        You will need bsh205bbr3.zip or later and *NOT* a prior version or
        the build will fail.  The same applies to djdev205.zip.

3.3.:   The package has been configured to be build in a separate build directory
        under the top srcdir (aka isl-0.20).  To build the binaries cd
        into /_build directory.  If for some reason you want to reconfigure the
        package cd into the build directory and run the
        following commands:
          del config.cache
          make clean
          ..\djgpp\config ./..

        Please note that you *MUST* delete the config.cache file in the /_build
        directory or you will not really reconfigure the sources because the
        configuration informations will be read from the cache file instead
        of being newly computed.

        config.bat, among other things, will start the configure script passing
        to it a couple of arguments.  You can control these argument passing the
        following command line arguments to config.bat:
          nls or no-nls, default nls.  NLS support enabled.
          cache or no-cache, default cache.  Cache in build directory.
          dep or no-dep, default no-dep.  No dependency tracking.
        All other configure specific options are not set by config.bat so their
        values are left as they are.  If no arguments are passed to config.bat
        then the default values are used.


        To build the programs in a directory other than where the sources are,
        you must add the parameter that specifies the source directory,
        e.g:
          x:\src\contrib\isl-0.20\djgpp\config x:/src/contrib/isl-0.20

        Lets assume you want to build the binaries in a directory placed on a
        different drive (z:\build in this case) from where the sources are,
        then you will run the following commands:
          z:
          md \build
          cd \build
          x:\src\contrib\isl-0.20\djgpp\config x:/src/contrib/isl-0.20

        The order of the options and the srcdir option does not matter.  You
        *MUST* use forward slashes to specify the source directory.

        The batch file will set same environment variables, make MSDOS specific
        modifications to the Makefile.in's and supply all other needed options
        to the configure script.

3.4.:   To compile the package run from the directory where you have configured
        the sources the command:
          make

3.5.:   Now you can run the tests if you like.  Start the command:
          make check

        No check shall fail.

3.6.:   To install the binaries and info docs run the following command from
        the directory where you have configured the sources:
          make install

        This will install the products into your DJGPP installation tree given
        by the default prefix "/dev/env/DJDIR".  If you prefer to install them
        into some other directory you will have to set prefix to the appropriate
        value:
          make install prefix=z:/some/other/place



        Send isl specific bug reports to <http://groups.google.com/group/isl-development>.
        Send suggestions and bug reports concerning the DJGPP port to
        comp.os.msdos.djgpp or <djgpp@delorie.com>.


Enjoy.

        Guerrero, Juan Manuel <juan.guerrero@gmx.de>
