# How to build ClickHouse

Build should work on Mac OS X 10.12. If you're using earlier version, you can try to build ClickHouse using Gentoo Prefix and clang sl in this instruction.
With appropriate changes, build should work on any other OS X distribution.

## Install Homebrew

```
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
```

## Install cmake, gcc

```
brew install cmake gcc
```

## Install GCC-compatible version of boost

```
brew install boost --cc=gcc-6
```

## Install required libraries

```
brew install icu4c mysql openssl unixodbc glib libtool gettext homebrew/dupes/libiconv homebrew/dupes/zlib
```

## Install optional libraries

```
brew install readline
```

# Checkout ClickHouse sources

```
git clone git@github.com:yandex/ClickHouse.git
# or: git clone https://github.com/yandex/ClickHouse.git

cd ClickHouse
```

Note that master branch is not stable.
For stable version, switch to some release branch.

## Use GCC 6 for builds

```
export CC=gcc-6
export CXX=g++-6
```

## Disable MongoDB binding
```
export ENABLE_MONGODB=0
```

## Detect number of threads

```
export THREADS=$(sysctl -n hw.ncpu)
```

# Build ClickHouse

```
mkdir build
cd build
cmake ..
make -j $THREADS
cd ..
```