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Building XZ Utils on Windows
============================
Introduction
------------
This document explains shortly where to get and how to install the
build tools that are needed to build XZ Utils on Windows. The final
binary package will be standalone in sense that it will depend only
on DLLs that are included in all Windows installations.
These instructions don't apply to Cygwin. XZ Utils can be built under
Cygwin in the same way as many other packages.
These instructions don't apply to MinGW and MSYS developers either,
who may want to package XZ Utils for MinGW or MSYS distributions.
You know who you are, and will probably use quite different configure
options etc. than what is described here.
Installing the toolchain(s)
---------------------------
Some of the following is needed:
- MSYS is always needed to use the GNU Autotools based build system.
- MinGW builds 32-bit x86 binaries.
- 32-bit MinGW-w64 (I call it MingW-w32 here) builds 32-bit x86
executables too.
- MinGW-w64 builds 64-bit x86-64 binaries.
So you need to pick between MinGW and MinGW-w32 when building
32-bit version. You don't need both.
You might find 7-Zip <https://7-zip.org/> handy when extracting
some files. The ready-made build script build.bash will also use
7-Zip to create the distributable .zip and .7z files.
I used the following directory structure but you can use whatever
you want. Just note that I will use these in my examples. Each of
these should have a subdirectory "bin":
C:\devel\tools\msys
C:\devel\tools\mingw
C:\devel\tools\mingw-w32
C:\devel\tools\mingw-w64
Installing MSYS
You can download MSYS from MinGW's Sourceforge page:
https://sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/
I recommend using MSYS 1.0.11 (MSYS-1.0.11.exe or
msysCORE-1.0.11-bin.tar.gz) because that package includes all the
required tools. At least some of the later versions include only
a subset and thus you would need to download the rest separately.
The old version will work fine for building XZ Utils.
You can use either the .exe or .tar.gz package. I prefer .tar.gz,
because it can be extracted into any directory and later removed
without worrying about uninstallers.
Installing MinGW
NOTE: This section may be outdated. I haven't tried MinGW recently.
You can download the required packages from MinGW's Sourceforge page:
https://sourceforge.net/projects/mingw/files/
These version numbers were the latest when I wrote this document, but
you probably should pick the latest versions:
MinGW Runtime -> mingwrt-3.17-mingw32-dev.tar.gz
MinGW API for MS-Windows -> w32api-3.14-mingw32-dev.tar.gz
GNU Binutils -> binutils-2.20-1-bin.tar.gz
GCC Version 4 -> gcc-full-4.4.0-mingw32-bin-2.tar.lzma
The full GCC package is quite big, but if you want a smaller
download, you will need to download more than one file, so I'm
using the full package in this document for simplicity.
Extract the packages in the above order, possibly overwriting files
from packages that were extracted earlier.
Installing MinGW-w32 or MinGW-w64
I used the packages from Mingw-builds project. With that it is
enough to pick one .7z file for 32-bit and another for 64-bit
toolchain. For XZ Utils 5.2.0 I used the packages from these
directories:
https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/mingw-builds/4.9.2/threads-win32/sjlj/
https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/4.9.2/threads-win32/sjlj/
If you install both MinGW-w32 and MinGW-w64, remember to extract
them into different directories. build.bash looks at
C:\devel\tools\mingw-w32 and C:\devel\tools\mingw-w64 by default.
Building XZ Utils
-----------------
Start MSYS by going to the directory C:\devel\tools\msys and running
msys.bat there (double-click or use command prompt). It will start
at "home" directory, which is C:\devel\tools\msys\home\YourUserName.
If you have xz-5.x.x.tar.gz in C:\devel, you should be able to build
it now with the following commands:
cd /c/devel
tar xzf xz-5.x.x.tar.gz
cd xz-5.x.x
bash windows/build.bash
If you used some other directory than C:\devel\tools for the build
tools, edit the variables near the beginning of build.bash first.
If you want to build manually, read the buildit() function in
build.bash. Look especially at the latter configure invocation.
Be patient. Running configure and other scripts used by the build
system is (very) slow under Windows.
Using a snapshot from the Git repository
To use a snapshot, the build system files need to be generated with
autogen.sh or "autoreconf -fi" before trying to build using the
above build instructions. You can install the relevant extra packages
from MinGW or use Cygwin or use e.g. a GNU/Linux system to create a
source package with the required build system files.
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