
                             Compress-Raw-Lzma

                               Version 2.100

                              7 January 2021

        Copyright (c) 2009-2021 Paul Marquess. All rights reserved.
          This program is free software; you can redistribute it
           and/or modify it under the same terms as Perl itself.

DESCRIPTION
-----------

This module provides a Perl interface to allow reading and writing of lzma, lzip
and xz files/buffers.

PREREQUISITES
-------------

Before you can build Compress-Raw-Lzma you need to have the following
installed on your system:

    * A C compiler

    * Perl 5.006 or better.

    * A copy of liblzma
      liblzma is part of the XZ Utils which is available at

            http://tukaani.org/xz/

Next you must edit the file config.in that comes with this distribution.
If necessary, change the INCLUDE and LIB variable to the directories where
liblzma and the lzma include file are installed.

BUILDING THE MODULE
-------------------

Assuming you have met all the prerequisites, the module can now be built
using this sequence of commands:

    perl Makefile.PL
    make
    make test

INSTALLATION
------------

To install Compress-Raw-Lzma, run the command below:

    make install

TROUBLESHOOTING
---------------

Test harness fails with: Undefined symbol "lzma_properties_size"
----------------------------------------------------------------

If the module appears to have built correctly, but the t/001version.t test
harness fails with the error

    Undefined symbol "lzma_properties_size"

it means you have two libraries called liblzma installed on your system.

The version of liblzma used by this module comes from http://tukaani.org/xz/.

There is another distribution, that comes from
http://tokyocabinet.sourceforge.net/misc/ that also builds a library called
liblzma.  The tokyocabinet version of liblzma is not compatible with this
module.  Note that the Perl module Compress-Lzma-Simple uses the
tokyocabinet version of liblzma.

The solution is either:

    1. Set the LIB variable in config.in to point to the directory where
       the correct liblzma library is installed.

    2. Remove the offending version of liblzma.

Solaris build fails with "language optional software package not installed"
---------------------------------------------------------------------------

If you are trying to build this module under Solaris and you get an
error message like this

    /usr/ucb/cc: language optional software package not installed

it means that Perl cannot find the C compiler on your system. The cryptic
message is just Sun's way of telling you that you haven't bought their
C compiler.

When you build a Perl module that needs a C compiler, the Perl build
system tries to use the same C compiler that was used to build perl
itself. In this case your Perl binary was built with a C compiler that
lived in /usr/ucb.

To continue with building this module, you need to get a C compiler,
or tell Perl where your C compiler is, if you already have one.

Assuming you have now got a C compiler, what you do next will be dependent
on what C compiler you have installed. If you have just installed Sun's
C compiler, you shouldn't have to do anything. Just try rebuilding
this module.

If you have installed another C compiler, say gcc, you have to tell perl
how to use it instead of /usr/ucb/cc.

This set of options seems to work if you want to use gcc. Your mileage
may vary.

    perl Makefile.PL CC=gcc CCCDLFLAGS=-fPIC OPTIMIZE=" "
    make test

If that doesn't work for you, it's time to make changes to the Makefile
by hand. Good luck!

Solaris build fails with "gcc: unrecognized option `-KPIC'"
-----------------------------------------------------------

You are running Solaris and you get an error like this when you try to
build this Perl module

    gcc: unrecognized option `-KPIC'

This symptom usually means that you are using a Perl binary that has been
built with the Sun C compiler, but you are using gcc to build this module.

When Perl builds modules that need a C compiler, it will attempt to use
the same C compiler and command line options that was used to build perl
itself. In this case "-KPIC" is a valid option for the Sun C compiler,
but not for gcc. The equivalent option for gcc is "-fPIC".

The solution is either:

    1. Build both Perl and this module with the same C compiler, either
       by using the Sun C compiler for both or gcc for both.

    2. Try generating the Makefile for this module like this perl

           perl Makefile.PL CC=gcc CCCDLFLAGS=-fPIC OPTIMIZE=" " LD=gcc
           make test

       This second option seems to work when mixing a Perl binary built
       with the Sun C compiler and this module built with gcc. Your
       mileage may vary.

HP-UX Notes
-----------

I've had a report that when building Compress-Raw-Lzma under HP-UX that it
is necessary to have first built the lzma library with the -fpic
option.

SUPPORT
-------

General feedback/questions/bug reports should be sent to
https://github.com/pmqs/Compress-Raw-Lzma/issues (preferred) or
https://rt.cpan.org/Public/Dist/Display.html?Name=Compress-Raw-Lzma.

FEEDBACK
--------

How to report a problem with Compress-Raw-Lzma.

To help me help you, I need all of the following information:

 1. The Versions of everything relevant.
    This includes:

     a. The *complete* output from running this

            perl -V

        Do not edit the output in any way.
        Note, I want you to run "perl -V" and NOT "perl -v".

        If your perl does not understand the "-V" option it is too
        old. This module needs Perl version 5.004 or better.

     b. The version of Compress-Raw-Lzma you have.
        If you have successfully installed Compress-Raw-Lzma, this one-liner
        will tell you:

           perl -MCompress::Raw::Lzma -e 'print qq[ver $Compress::Raw::Lzma::VERSION\n]'

        If you are  running windows use this

           perl -MCompress::Raw::Lzma -e "print qq[ver $Compress::Raw::Lzma::VERSION\n]"

        If you haven't installed Compress-Raw-Lzma then search Compress::Raw::Lzma.pm
        for a line like this:

          $VERSION = "2.100" ;

     c. The version of lzma you have used.
        If you have successfully installed Compress-Raw-Lzma, this one-liner
        will tell you:

          perl -MCompress::Raw::Lzma -e "print q[lzma ver ]. Compress::Raw::Lzma::ZLIB_VERSION.qq[\n]"

        If not, look at the beginning of the file zlib.h.

 2. If you are having problems building Compress-Raw-Lzma, send me a
    complete log of what happened. Start by unpacking the Compress-Raw-Lzma
    module into a fresh directory and keep a log of all the steps

        [edit config.in, if necessary]
        perl Makefile.PL
        make
        make test TEST_VERBOSE=1

Paul Marquess <pmqs@cpan.org>
