Updated Build Linux (markdown)

Build-Linux.md

@@ -1,17 +1,17 @@
-Building CubicSDR for Linux:
+##Building CubicSDR for Linux:
 ---
 
-Basic build support:
+###Basic build support:
 ```bash
 $ sudo apt-get install git build-essential automake cmake
 ```
 
-Base Dependencies: (debian)
+###Base Dependencies: (debian)
 ```bash
 $ sudo apt-get install libfftw3-dev libwxgtk3.0-dev libpulse-dev
 ```
 
-Build and install SoapySDR
+###Build and install SoapySDR
 ```bash
 $ git clone https://github.com/pothosware/SoapySDR.git
 $ cd SoapySDR
@@ -24,7 +24,7 @@ build$ sudo ldconfig
 build$ SoapySDRUtil --info #test SoapySDR install
 ```
 
-Build and install liquid-dsp
+###Build and install liquid-dsp
 ```bash
 $ git clone https://github.com/jgaeddert/liquid-dsp
 liquid-dsp$ cd liquid-dsp
@@ -35,7 +35,7 @@ liquid-dsp$ sudo make install
 liquid-dsp$ sudo ldconfig
 ```
 
-Build CubicSDR
+###Build CubicSDR
 ```bash
 $ git clone https://github.com/cjcliffe/CubicSDR.git
 CubicSDR$ cd CubicSDR
@@ -59,11 +59,12 @@ Un-install CubicSDR
 build$ sudo make uninstall
 ```
 
-Support Modules
+
+
+## Support Modules
 ---
 
-
-SoapyRTLSDR (similar to other Soapy modules):
+### SoapyRTLSDR (similar to other Soapy modules):
 ```bash
 $ sudo apt-get install librtlsdr-dev
 $ git clone https://github.com/pothosware/SoapyRTLSDR.git
@@ -78,9 +79,10 @@ build$ sudo ldconfig
 build$ SoapySDRUtil --probe     
 ```
 
-SoapySDRPlay (similar to other Soapy modules):
+### SoapySDRPlay (similar to other Soapy modules):
 
 ** Note: requires API from http://sdrplay.com/linux.html to be installed first.
+** Also note that the SoapySDRPlay installer will at present time install an earlier SoapySDR binary -- please re-run 'sudo make install' for your SoapySDR build folder to update to the build version after installing.
 ```bash
 $ git clone https://github.com/pothosware/SoapySDRPlay.git
 $ cd SoapySDRPlay
@@ -94,3 +96,35 @@ build$ SoapySDRUtil --probe
 ```
 
 - Always ensure to update, build and install SoapySDR before building dependent projects.
+
+
+
+
+## Ubuntu 15.10 Note:
+
+If you've installed a graphics driver that includes OpenGL and your libGL.so currently points to an invalid mesa/libGL.so you may get a compiler error:
+```bash
+make[2]: *** No rule to make target '/usr/lib/x86_64-linux-gnu/libGL.so', needed by 'x64/CubicSDR'.  Stop.
+```
+
+Checking the link should reveal that it's pointing at a deleted file:
+```
+$ ls -lah /usr/lib/x86_64-linux-gnu/libGL.so
+lrwxrwxrwx 1 root root 13 Oct  9 01:16 /usr/lib/x86_64-linux-gnu/libGL.so -> mesa/libGL.so
+```
+
+To fix the link first remove the old one:
+```
+$ sudo rm /usr/lib/x86_64-linux-gnu/libGL.so
+```
+
+Then check where libGL.so.1 is pointing:
+```
+$ ls -lah /usr/lib/x86_64-linux-gnu/libGL.so.1
+lrwxrwxrwx 1 root root 15 Dec 20 19:03 /usr/lib/x86_64-linux-gnu/libGL.so.1 -> libGL.so.358.16
+```
+
+And create a new link to the same location:
+```
+$ sudo ln -s /usr/lib/x86_64-linux-gnu/libGL.so.358.16 /usr/lib/x86_64-linux-gnu/libGL.so
+```