1 [[!meta title="cross-compiling tinc for Windows under Linux using MinGW"]]
3 ## Howto: cross-compiling tinc for Windows under Linux using MinGW
5 This howto describes how to create a Windows binary of tinc. Although it is
6 possible to compile tinc under Windows itself, cross-compiling it under Linux
7 is much faster. It is also much easier to get all the dependencies in a modern
8 distribution. Therefore, this howto deals with cross-compiling tinc with MinGW
9 under Linux on a Debian distribution.
15 * Install MinGW and Wine.
16 * Create a directory where we will perform all cross-compilations.
17 * Get all the necessary sources.
18 * Cross-compile everything.
20 ### Installing the prerequisites for cross-compilation
22 There are only a few packages that need to be installed as root to get started:
24 > sudo apt-get install mingw32 wine git-core
25 > sudo apt-get build-dep tinc
27 ### Setting up the build directory and getting the sources
29 We will create a directory called `mingw/` in the home directory. We use
30 apt-get to get the required libraries necessary for tinc, and use `git` to get
31 the latest development version of tinc.
35 > apt-get source openssl liblzo2-dev zlib1g-dev
36 > git clone git://tinc-vpn.org/tinc
38 ### Making cross-compilation easy
40 To make cross-compiling easy, we create a script called `mingw` that will set
41 up the necessary environment variables so configure scripts and Makefiles will
42 use the MinGW version of GCC and binutils:
45 > cat >$HOME/bin/mingw << EOF
47 > export CC=i586-mingw32msvc-gcc
48 > export CXX=i586-mingw32msvc-g++
49 > export CPP=i586-mingw32msvc-cpp
50 > export RANLIB=i586-mingw32msvc-ranlib
51 > export PATH="/usr/i586-mingw32msvc/bin:$PATH"
55 If `$HOME/bin` is not already part of your `$PATH`, you need to add it:
57 > export PATH="$HOME/bin:$PATH"
59 We use this script to call `./configure` and `make` with the right environment
60 variables, but only when the `./configure` script doesn't support cross-compilation itself.
61 You can also run the export commands from the `mingw` script by
62 hand instead of calling the mingw script for every `./configure` or `make`
63 command, or execute `$HOME/bin/mingw $SHELL` to get a shell with these
64 environment variables set, but in this howto we will call it explicitly every
69 Cross-compiling LZO is easy:
71 > cd $HOME/mingw/lzo2-2.03
72 > ./configure --host=i586-mingw32msvc
74 > DESTDIR=$HOME/mingw make install
78 Cross-compiling Zlib is also easy, but a plain `make` failed to compile the
79 tests, so we only build the static library here:
81 > cd $HOME/mingw/zlib-1.2.3.3.dfsg
84 > DESTDIR=$HOME/mingw mingw make install
88 OpenSSL is always a bit hard to compile, because they have their own
89 `Configure` script that needs some tweaking. There is also a small bug in
90 e_os2.h that breaks compilation with recent versions of GCC. First download
91 this [[openssl-cross-compilation.diff]] to your home directory, then patch
92 OpenSSL, and then compile as usual. Do not use the `-j` option when compiling
93 OpenSSL, it will break.
95 > cd $HOME/mingw/openssl-0.9.8k
96 > patch < $HOME/openssl-cross-compilation.diff
97 > mingw ./Configure --openssldir=$HOME/mingw/usr/local mingw
103 Now that all the dependencies have been cross-compiled, we can cross-compile
104 tinc. Since we use a clone of the git repository here, we need to run
105 `autoreconf` first. If you want to cross-compile tinc from a released tarball,
106 this is not necessary.
108 > cd $HOME/mingw/tinc
110 > ./configure --host=i586-mingw32msvc --with-openssl=$HOME/mingw/usr/local
115 Since Wine was installed, you can execute the resulting binary even on Linux.
116 You cannot do much however, since tinc requires a TAP-Win32 device, which is
117 not available in Wine. Still, the following command should work:
119 > $HOME/mingw/tinc/src/tincd.exe --help