This is a port of GNU m4 1.4.17 to MSDOS/DJGPP.

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

        - The port honors the value of the PATH_SEPARATOR environment variable
        to decide if colon or semicolon shall be used as path separator for
        the M4PATH environment variable.  If PATH_SEPARATOR is not set then
        semicolon will be used as path separator.

        - The port will also honor the value of the TMP and the TEMP environment
        variables to determinate where to store temporary files if TMPDIR is not
        set.  If neither of the three environment variables are set or if they
        point to not existing directories the value of P_tmpdir will be used.
        If this directory is also not accessible then the current working
        directory will be used.

        - The port defines two new macros to identify the platform m4 is running
        on.  These are "__djgpp__" and "__msdos__" and "djgpp" and "msdos" if
        the -G option is specified.

        - The port assumes that a bash compatible shell is installed to execute
        the m4 commands syscmd and esyscmd.  The shell to be used is defined at
        compile time by the value of "with_syscmd_shell" variable defined in the
        distributed config.site.  The current value is "/dev/env/DJDIR/bin/sh".
        If the variable is not set then COMMAND.COM will be used as default shell
        for these two commands.  Because most of the executed scripts are UNIX
        based it is not recommended to use COMMAND.COM and always to install the
        newest version of DJGPP's port of bash.

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


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

2.1.:   Copy the binary distribution into the top DJGPP installation directory
        and unzip it running *ONE* of the following commands:
          unzip32 m4-1417b.zip      or
          djtarx m4-1417b.zip       or
          pkunzip -d m4-1417b.zip

        For further information about GNU m4 please read the info docs
        and the NEWS file.


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 m4-1417s.zip      or
          djtarx m4-1417s.zip       or
          pkunzip -d m4-1417s.zip

3.2.:   To build the binaries you will need the following binary packages:
          djdev203.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,
          mktmpNNb.zip and gwkNNNb.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 djdev203.zip.

3.3.:   The package has been configured for both DJGPP 2.03 and DJGPP 2.04.
        There is a separate build directory for DJGPP 2.03 and for DJGPP 2.04
        under the top srcdir (aka grep-1.417).  To build the binaries
        using the 2.03 version of DJGPP cd into _build.203; if you prefer to
        build the binaries using DJGPP 2.04 cd into _build.204.  If for some
        reason you want to reconfigure the package cd into the corresponding
        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 djgpp
        subdir 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.
          cache or no-cache, default cache.
          dep or no-dep, default no-dep.  No dependency tracking.
          silent or no-silent, default no-silent.  Be verbose when compiling and
                                                   linke of the products.
        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\gnu\grep-1.417\djgpp\config x:/src/gnu/m4-1.417

        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\gnu\m4-1.417\djgpp\config x:/src/gnu/m4-1.417

        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 test suite by issuing the command:
          make check
        from the directory where you configured the sources.  The 198.sysval
        test will fail because no kill command is available.  Thus this test
        has been added to list of tests to be skipped by this port.  The tests
        125.changeword, 126.changeword, 127.changeword, 128.changeword,
        129.changeword and 130.changeword will be skipped because no changeword
        support is available in this port.  The test stackovf.test will be
        skipped because this port offers no stack overflow support.

3.6.:   To install the binary, info docs and man pages 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.
        Example:
          make install prefix=z:/some/other/dir




        Send GNU m4 specific bug reports to <bug-m4@gnu.org>.
        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>
