diff src/capnproto-git-20161025/doc/install.md @ 48:9530b331f8c1

Add Cap'n Proto source

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+---
+layout: page
+title: Installation
+---
+
+# Installation: Tools and C++ Runtime
+
+The Cap'n Proto tools, including the compiler (which takes `.capnp` files and generates source code
+for them), are written in C++.  Therefore, you must install the C++ package even if your actual
+development language is something else.
+
+This package is licensed under the [MIT License](http://opensource.org/licenses/MIT).
+
+## Caveats
+
+<p style="font-size: 125%; font-weight: bold;">Cap'n Proto is in BETA</p>
+
+<div style="float: right"><a class="groups_link" style="color: #fff"
+href="https://groups.google.com/group/capnproto-announce">Sign Up for Updates</a></div>
+
+As of this writing, Cap'n Proto is in beta.  The serialization layer is close to feature-complete
+and we don't anticipate any further changes to the wire format.  That said, if you want to use it,
+you should keep in mind some caveats:
+
+* **Security:** Cap'n Proto has not yet had a security review.  Although Kenton has a background
+  in security and is not aware of any vulnerabilities in the current code, it's likely that there
+  are a few, and [some have been found](https://github.com/sandstorm-io/capnproto/tree/master/security-advisories)
+  in the past.  For now, do not accept Cap'n Proto messages from parties you do not trust.
+* **API Stability:** The Cap'n Proto programming interface may still change in ways that break
+  existing code.  Such changes are likely to be minor and should not affect the wire format.
+* **Performance:** While Cap'n Proto is inherently fast by design, the implementation has not yet
+  undergone serious profiling and optimization.  Currently it only beats Protobufs in realistic-ish
+  end-to-end benchmarks by around 2x-5x.  We can do better.
+* **RPC:** The RPC implementation particularly experimental, though it is used heavily by
+  [Sandstorm.io](https://sandstorm.io).
+
+If you'd like to hack on Cap'n Proto, you should join the
+[discussion group](https://groups.google.com/group/capnproto)!
+
+If you'd just like to receive updates as things progress, add yourself to the
+[announce list](https://groups.google.com/group/capnproto-announce).
+
+## Prerequisites
+
+### Supported Compilers
+
+Cap'n Proto makes extensive use of C++11 language features. As a result, it requires a relatively
+new version of a well-supported compiler. The minimum versions are:
+
+* GCC 4.8
+* Clang 3.3
+* Visual C++ 2015 (lite mode only)
+
+If your system's default compiler is older that the above, you will need to install a newer
+compiler and set the `CXX` environment variable before trying to build Cap'n Proto. For example,
+after installing GCC 4.8, you could set `CXX=g++-4.8` to use this compiler.
+
+### Supported Operating Systems
+
+In theory, Cap'n Proto should work on any POSIX platform supporting one of the above compilers,
+as well as on Windows. We test every Cap'n Proto release on the following platforms:
+
+* Android
+* Linux
+* Mac OS X
+* Windows - Cygwin
+* Windows - MinGW-w64 (lite mode and compiler binary only)
+* Windows - Visual C++ (lite mode only)
+
+**Windows users:** As of Visual Studio 2015, Visual C++ still does not support enough of C++11 to
+compile Cap'n Proto's reflection or RPC APIs. "Cap'n Proto Lite" omits these features from the
+library, giving you only the core serialization based on generated code.
+
+**Mac OS X users:** You must use at least Xcode 5 with the Xcode command-line
+tools (Xcode menu > Preferences > Downloads).  Alternatively, the command-line tools
+package from [Apple](https://developer.apple.com/downloads/) or compiler builds from
+[Macports](http://www.macports.org/), [Fink](http://www.finkproject.org/), or
+[Homebrew](http://brew.sh/) are reported to work.
+
+## Installation: Unix
+
+**From Release Tarball**
+
+You may download and install the release version of Cap'n Proto like so:
+
+<pre><code>curl -O <a href="https://capnproto.org/capnproto-c++-0.0.0.tar.gz">https://capnproto.org/capnproto-c++-0.0.0.tar.gz</a>
+tar zxf capnproto-c++-0.0.0.tar.gz
+cd capnproto-c++-0.0.0
+./configure
+make -j6 check
+sudo make install</code></pre>
+
+This will install `capnp`, the Cap'n Proto command-line tool.  It will also install `libcapnp`,
+`libcapnpc`, and `libkj` in `/usr/local/lib` and headers in `/usr/local/include/capnp` and
+`/usr/local/include/kj`.
+
+**From Package Managers**
+
+Some package managers include Cap'n Proto packages.
+
+Note: These packages are not maintained by us and are sometimes not up to date with the latest Cap'n Proto release.
+
+* Debian / Ubuntu: `apt-get install capnproto`
+* Homebrew (OSX): `brew install capnp`
+
+**From Git**
+
+If you download directly from Git, you will need to have the GNU autotools --
+[autoconf](http://www.gnu.org/software/autoconf/),
+[automake](http://www.gnu.org/software/automake/), and
+[libtool](http://www.gnu.org/software/libtool/) -- installed.
+
+    git clone https://github.com/sandstorm-io/capnproto.git
+    cd capnproto/c++
+    autoreconf -i
+    ./configure
+    make -j6 check
+    sudo make install
+
+## Installation: Windows
+
+**From Release Zip**
+
+1. Download Cap'n Proto Win32 build:
+
+   <pre><a href="https://capnproto.org/capnproto-c++-win32-0.0.0.zip">https://capnproto.org/capnproto-c++-win32-0.0.0.zip</a></pre>
+
+2. Find `capnp.exe`, `capnpc-c++.exe`, and `capnpc-capnp.exe` under `capnproto-tools-win32-0.0.0` in
+   the zip and copy them somewhere.
+
+If you don't care about C++ support, you can stop here. The compiler exe can be used with plugins
+provided by projects implementing Cap'n Proto in other languages.
+
+If you want to use Cap'n Proto in C++ with Visual Studio, do the following:
+
+1. Install [CMake](http://www.cmake.org/) version 3.1 or later.
+
+2. Use CMake to generate Visual Studio project files under `capnproto-c++-0.0.0` in the zip file.
+   You will need to enable the CMake project options `CAPNP_LITE` and `EXTERNAL_CAPNP`.
+   You can use the CMake UI for this or run this shell command:
+
+       cmake -G "Visual Studio 14 2015" -DCAPNP_LITE=1 -DEXTERNAL_CAPNP=1
+
+    If the `capnp.exe` and `capnpc-c++.exe` tools are not on your `PATH`, then `CAPNP_EXECUTABLE`
+    and `CAPNPC_CXX_EXECUTABLE` will need to be set to their respective locations.
+
+3. Open the "Cap'n Proto" solution in Visual Studio.
+
+4. Adjust the project build options (e.g., choice of C++ runtime library, enable/disable exceptions
+   and RTTI) to match the options of the project in which you plan to use Cap'n Proto.
+
+5. Build the solution (`ALL_BUILD`).
+
+6. Build the `INSTALL` project to copy the compiled libraries and header files into `CMAKE_INSTALL_PREFIX`.
+
+   Alternatively, find the compiled `.lib` files in the build directory under
+   `src/{capnp,kj}/{Debug,Release}` and place them somewhere where your project can link against them.
+   Also add the `src` directory to your search path for `#include`s, or copy all the headers to your
+   project's include directory.
+
+7. Add `#define CAPNP_LITE 1` to either your project's precompiled/shared header or compiler options.
+
+**From Git**
+
+If you download directly from Git, you'll need to compile the Cap'n Proto tools (the `.exe`s) using
+MinGW-w64. This is easiest to do in Cygwin or on Linux. For example, on Debian or Ubuntu, you can
+install MinGW like so:
+
+    sudo apt-get install mingw-w64
+
+You'll first need to install Cap'n Proto on the host system (using the Unix installation
+instructions, above). Then, do:
+
+    make distclean
+    ./configure --host=i686-w64-mingw32 --with-external-capnp \
+      --disable-shared CXXFLAGS='-static-libgcc -static-libstdc++'
+    make -j6 capnp.exe capnpc-c++.exe capnpc-capnp.exe
+
+Now that you have the `exe`s, you can proceed with the usual Windows compilation instructions.