Created FreeBSD Build (markdown)

FreeBSD-Build.md

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+## FreeBSD 11
+There are 2 different ways of installing XMRig on FreeBSD 11.
+
+### 1. Installation via the ports collection:
+```bash
+cd /usr/ports/net-p2p/xmrig && make install clean
+```
+*or*
+```bash
+cd /usr/ports/ports-mgmt/portmaster && make install clean
+portmaster net-p2p/xmrig
+```
+
+### 2. Using binary packages and building XMRig from source:
+
+Using Clang:
+```bash
+pkg install git clang38 cmake libuv libmicrohttpd
+git clone https://github.com/xmrig/xmrig.git
+cd xmrig
+mkdir build
+cd build
+cmake ..
+make
+```
+*or*
+
+Using GCC:
+```bash
+pkg install git gcc7 cmake libuv libmicrohttpd
+git clone https://github.com/xmrig/xmrig.git
+cd xmrig
+mkdir build
+cd build
+cmake -DCMAKE_C_COMPILER=gcc7 -DCMAKE_CXX_COMPILER=g++7 ..
+make
+```
+
+## Additional CMake options
+
+* `-DWITH_LIBCPUID=OFF` Disable libcpuid. Auto configuration of CPU after this will be very limited.
+* `-DWITH_AEON=OFF` Disable CryptoNight-Lite support.
+* `-DWITH_HTTPD=OFF` Build without built-in httpd and API.
+* `-DUV_LIBRARY=/usr/local/lib/libuv.a` Use static libuv version.
+* `-DMHD_LIBRARY=/usr/local/lib/libmicrohttpd.a` Use static libmicrohttpd version.