Mail Archives: djgpp-announce/2015/07/11/18:43:27
This is a port of XZ utils 5.0.8 to MSDOS/DJGPP.
XZ utils provide a general-purpose data compression library and command line
tools. The native file format is the .xz format, but also the legacy .lzma
format is supported. The .xz format supports multiple compression algorithms,
which are called "filters" in context of XZ Utils. The primary filter is
currently LZMA2. With typical files, XZ utils create about 30 % smaller
files than gzip.
To ease adapting support for the .xz format into existing applications and
scripts, the API of liblzma is somewhat similar to the API of the popular
zlib library. For the same reason, the command line tool xz has similar
command line syntax than that of gzip.
DJGPP specific changes.
=======================
The sources do not compile with djdev203 because inttypes.h and snprintf are
missed. This port uses the CVS repository version of snprintf. The required
definition for PRIx32 and PRIx64 have been taken from the CVS repository
version of inttypes.h.
The library code itself has not been changed. The code has already enough
DJGPP support. But the driver program has no SFN support at all. It simply
appends a ".xz" or ".lzma" extension to the original file name according to
the compression algorithm used. This will work on systems with LFN support
but not on plain DOS. I have applied the same schema that I have used for
the BZIP2 port. Unfortunately the original file name is not stored in the
compressed file header so there will be no way to restore the original file
name extension on SFN systems. The program will try to preserve as much
characters as possible from the extension.
For SFN systems the following rules apply for ".xz" extension:
compressed name uncompressed name
filename.exx --> filename.ex
filename.exz --> filename.e
filename.xz --> filename
uncompressed name compressed name
filename.ext --> filename.exx
filename.ex --> filename.exx
filename.e --> filename.exz
filename --> filename.xz
For SFN systems the following rules apply for ".lzma" extension:
compressed name uncompressed name
filename.exl --> filename.ex
filename.elz --> filename.e
filename.lzm --> filename
uncompressed name compressed name
filename.ext --> filename.exl
filename.ex --> filename.exl
filename.e --> filename.elz
filename --> filename.lzm
The port will detect at run time if LFN support is available or not and will
select the method to handle the extension creation accordingly. For LFN and
SFN systems, ".txz" and ".tlz" extensions are always identified as tar files.
Their file name will always get a ".tar" extension. On LFN systems the port
will behave as the original concerning the generation of the extension.
To compile the sources and run the test suite you will need LFN support.
The source package is configured to be build in the "_build.205" directory.
The port has been configured and compiled on WinXP SP3. 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 DJGPP 2.05 version of the port has been compiled using gcc510 and bnu225br2.
This is the first port that has been compiled using djdev205. Starting with
this port version I will no longer support neither djdev204 nor djdev203.
The port has been tested by using it. I have used them only on WinXP.
It has worked flawlessly. I do not konw if this will ever be the case on
FreeDOS. I have never used/tested them in that environment.
The port does not provide NLS support. No one of the required libraries
have been ported using DJGPP 2.05.
All the changes done to the original distribution are documented in the
diffs file and located together with all the files needed to configure
the package (config.bat, config.sed, config.site, etc.) in the /djgpp
directory.
For further information about XZ utils please read the info docs and NEWS file.
This is an verbatim extract of the NEWS file:
-------------------------------------------------------------------------------
5.0.8 (2014-12-21)
* Fixed an old bug in xzgrep that affected OpenBSD and probably
a few other operating systems too.
* Updated French and German translations.
* Added support for detecting the amount of RAM on AmigaOS/AROS.
* Minor build system updates.
5.0.7 (2014-09-20)
* Fix regressions introduced in 5.0.6:
- Fix building with non-GNU make.
- Fix invalid Libs.private value in liblzma.pc which broke
static linking against liblzma if the linker flags were
taken from pkg-config.
5.0.6 (2014-09-14)
* xzgrep now exits with status 0 if at least one file matched.
* A few minor portability and build system fixes
-------------------------------------------------------------------------------
The port consists of the usual four packages produced using djdev205
that can be downloaded from ftp.delorie.com and mirrors as (time stamp 2015-07-11):
XZ utils 5.0.8 binaries, scripts and man format documentation:
ftp://ftp.delorie.com/pub/djgpp/beta/v2apps/xz-508b.zip
XZ utils 5.0.8 lzma library and headers:
ftp://ftp.delorie.com/pub/djgpp/beta/v2apps/xz-508a.zip
XZ utils 5.0.8 pdf format documentation:
ftp://ftp.delorie.com/pub/djgpp/beta/v2apps/xz-508d.zip
XZ utils 5.0.8 source:
ftp://ftp.delorie.com/pub/djgpp/beta/v2apps/xz-508s.zip
Send XZ utils specific bug reports to <lasse DOT collin AT tukaani DOT org>.
Send suggestions and bug reports concerning the DJGPP port to
comp.os.msdos.djgpp or <djgpp AT delorie DOT com>.
Enjoy.
Guerrero, Juan Manuel <juan DOT guerrero AT gmx DOT de>
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