Created Linux Build (markdown)

Linux-Build.md

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+## Dependencies:
+
+You'll need to download and install the following to build Citra:
+
+* [GLFW](http://www.glfw.org/download.html) (tested with v3.0.4)
+ * Requires X11 and OpenGL header packages installed, e.g. xorg-dev and libglu1-mesa-dev on Ubuntu
+* [Qt v4](http://qt-project.org/downloads) (tested with version 4.8.5.
+ * Note... v5 will be supported soon
+* GCC v4.7+ (for C++11 support)
+* [CMake](http://www.cmake.org/)
+
+## Build GLFW:
+
+Works by calling these commands from a terminal:
+
+<pre>git clone https://github.com/glfw/glfw.git
+cd glfw
+mkdir build && cd build
+cmake ..
+make
+sudo make install</pre>
+
+## Build Citra:
+
+<pre>mkdir build
+cd build
+cmake ..
+make
+sudo make install (currently doesn't work, needs to be fixed)
+Optionally, you can use "cmake -i .." to adjust various options (e.g. disable Qt4 GUI).</pre>
+
+## Building with debug symbols:
+
+<pre>cmake .. -DCMAKE_BUILD_TYPE=Debug
+make</pre>
+
+## Running without installing:
+
+<pre>cd data
+../build/src/citra_qt/citra-qt</pre>
+
+## Debugging:
+
+<pre>cd data
+gdb ../build/src/citra_qt/citra-qt
+(gdb) run
+(gdb) bt</pre>