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Building ZeroTier One from Source
======
(See RUNNING.md for what to do next.)
Developers note: there is currently no management of dependencies on *nix platforms, so you should 'make clean ; make' if you change a header (.h or .hpp) file. Need to fix eventually.
### Linux and BSD
Just type 'make' (or 'gmake' on BSD). You will need gcc/g++ or clang/clang++ installed. No other third party libraries are needed.
Very old versions of Linux or BSD may run into problems. On Linux our primary build container is CentOS 6 (for backward compatibility), and on FreeBSD we've only tested with FreeBSD 10.
### Macintosh
Just type 'make'. You'll need Xcode and the command line tools installed of course.
To install the tap driver, 'sudo make install-mac-tap' will place it in the default ZeroTier home directory. We ship a signed tap driver binary for ZeroTier One that should work for everyone.
If you do for some reason want to build ext/tap-mac you will need an older version of the OSX gcc compiler chain than what currently ships (clang) to build a properly backward compatibile image. A copy is hosted here:
http://download.zerotier.com/dev/llvm-g++-Xcode4.6.2.tar.bz2
Un-tar this into ext/ (it's excluded in .gitignore) and then 'make' in ext/tap-mac/tuntap/src/tap.
We really don't recommend messing with this build yourself unless you think there's a bug in the driver and want to try to fix it. So far the driver has been completely stable for a very long time and the old binaries continue to work flawlessly on (last we checked) 10.10.
### Windows
There's a Visual Studio 2012 solution file in windows/ that can be used. I've never tried it with MinGW, but theoretically this should be possible.
Windows is, of course, harder to build than any other platform.
### Debug builds
The Unix/Mac makefiles support a ZT_DEBUG=1 option ('make ZT_DEBUG=1') to build a version that will print a whole bunch of TRACE output to stderr as it runs. This also builds the binary with debug rather than production optimized flags.
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