extend README.txt

add overview about advanced compile options

README.md

@@ -1,11 +1,11 @@
-### XMR-Stak-CPU - Monero mining software
+# XMR-Stak-CPU - Monero mining software
 
 XMR-Stak is a universal Stratum pool miner. This is the CPU-mining version; there is also an [AMD GPU version](https://github.com/fireice-uk/xmr-stak-amd) and an [NVIDA GPU version](https://github.com/fireice-uk/xmr-stak-nvidia)
 
-#### HTML reports
+## HTML reports
 <img src="https://gist.githubusercontent.com/fireice-uk/2da301131ac01695ff79539a27b81d68/raw/4c09cdeee86f94df2e9dd86b927e64aded6184f5/xmr-stak-cpu-hashrate.png" width="260"> <img src="https://gist.githubusercontent.com/fireice-uk/2da301131ac01695ff79539a27b81d68/raw/4c09cdeee86f94df2e9dd86b927e64aded6184f5/xmr-stak-cpu-results.png" width="260"> <img src="https://gist.githubusercontent.com/fireice-uk/2da301131ac01695ff79539a27b81d68/raw/4c09cdeee86f94df2e9dd86b927e64aded6184f5/xmr-stak-cpu-connection.png" width="260">
 
-#### Usage on Windows 
+## Usage on Windows 
 1) Edit the config.txt file to enter your pool login and password. 
 2) Double click the exe file. 
 
@@ -42,22 +42,27 @@ lBoYbHZRpcWUfDO8o2y+ZQIs+yzMoJHHBBXB9fsHlwq62PTtzjsEVwB2aq9ABzk=
 
 ```
 
-#### Usage on Linux (Debian-based distros)
+## Compile on Linux (Debian-based distros)
+
+### GNU Compiler
 ```
     sudo apt-get install libmicrohttpd-dev libssl-dev cmake build-essential
     cmake .
-    make
+    make install
 ```
 
-GCC version 5.1 or higher is required for full C++11 support. CMake release compile scripts, as well as CodeBlocks build environment for debug builds is included.
+- GCC version 5.1 or higher is required for full C++11 support. CMake release compile scripts, as well as CodeBlocks build environment for debug builds is included.
 
-To do a static build for a system without gcc 5.1+
+### To do a static build for a system without gcc 5.1+
 ```
-    cmake -DCMAKE_BUILD_TYPE=STATIC
-    make
+    cmake -DCMAKE_BUILD_TYPE=STATIC .
+    make install
 ```
 Note - cmake caches variables, so if you want to do a dynamic build later you need to specify '-DCMAKE_BUILD_TYPE=RELEASE'
 
+
+You can find a complete compile guide under [Advanced Compile Options](#advanced-compile-options).
+
 #### CPU mining performance 
 
 Performance is nearly identical to the closed source paid miners. Here are some numbers:
@@ -67,7 +72,7 @@ Performance is nearly identical to the closed source paid miners. Here are some
 * **Dual X5650** - 466 H/s (depends on NUMA)
 * **Dual E5640** - 365 H/s (same as above)
 
-#### Default dev donation
+## Default dev donation
 By default the miner will donate 1% of the hashpower (1 minute in 100 minutes) to my pool. If you want to change that, edit **donate-level.h** before you build the binaries.
 
 If you want to donate directly to support further development, here is my wallet
@@ -76,7 +81,7 @@ If you want to donate directly to support further development, here is my wallet
 4581HhZkQHgZrZjKeCfCJxZff9E3xCgHGF25zABZz7oR71TnbbgiS7sK9jveE6Dx6uMs2LwszDuvQJgRZQotdpHt1fTdDhk
 ```
 
-#### PGP Key
+## PGP Key
 ```
 -----BEGIN PGP PUBLIC KEY BLOCK-----
 Version: GnuPG v2
@@ -110,7 +115,7 @@ c4hC0Yg9Dha1OoE5CJCqVL+ic4vAyB1urAwBlsd/wH8=
 -----END PGP PUBLIC KEY BLOCK-----
 ```
 
-### Common Issues
+## Common Issues
 
 **SeLockMemoryPrivilege failed**
 
@@ -160,4 +165,38 @@ You can also do it Windows-style and simply run-as-root, but this is NOT recomme
 This typically means you are trying to run it on a CPU that does not have [AES](https://en.wikipedia.org/wiki/AES_instruction_set).  This only happens on older version of miner, new version gives better error message (but still wont' work since your CPU doesn't support the required instructions).
 
 
+## Advanced Compile Options
 
+The build system is CMake, if you are not familiar with CMake you can learn more [here](https://cmake.org/runningcmake/).
+
+### Short Description
+
+There are two easy ways to set variables for `cmake` to configure *xmr-stak-cpu*
+- use the ncurses GUI
+  - `ccmake .`
+  - edit your options
+  - end the GUI by pressing the key `c`(create) and than `g`(generate)
+- set Options on the command line
+  - enable a option: `cmake . -DNAME_OF_THE_OPTION=ON`
+  - disable a option `cmake . -DNAME_OF_THE_OPTION=OFF`
+  - set a value `cmake . -DNAME_OF_THE_OPTION=value`
+
+After the configuration you need to call
+`make install` for slow sequential build
+or
+`make -j install` for faster parallel build
+and install.
+
+### xmr-stak-cpu Compile Options
+- `CMAKE_INSTALL_PREFIX` install miner to the home folder
+  - `cmake . -DCMAKE_INSTALL_PREFIX=$HOME/xmr-stak-cpu`
+  - you can find the binary and the `config.txt` file after `make install` in `$HOME/xmr-stak-cpu/bin`
+-`CMAKE_BUILD_TYPE` set the build type
+  - valid options: `Release` or `Debug`
+  - you should always keep `Release` for your productive miners
+- `MICROHTTPD_REQUIRED` allow to disable/enable the dependency *microhttpd*
+  - by default enabled
+  - there is no *http* interface available if option is disabled: `cmake . -DMICROHTTPD_REQUIRED=OFF`
+- `OpenSSL_REQUIRED`allow to disable/enable the dependency *OpenSSL*
+  - by default enabled
+  - it is not possible to connect to a *https* secured pool if optin is disabled: `cmake . -DOpenSSL_REQUIRED=OFF`