### Dependencies
* [CMake][cmake]: for generating compilation targets.
+* [Python 2.7][python]: for executing SPIRV-Tools scripts. (Optional if not using SPIRV-Tools.)
* [bison][bison]: _optional_, but needed when changing the grammar (glslang.y).
* [googletest][googletest]: _optional_, but should use if making any changes to glslang.
./update_glslang_sources.py
```
+For running the CMake GUI or Visual Studio with python dependencies, you will,
+in addition to python within the cygwin environment, need a Windows [python][python]
+installation, including selecting the `PATH` update.
+
#### 3) Configure
Assume the source directory is `$SOURCE_DIR` and
[cmake]: https://cmake.org/
+[python]: https://www.python.org/
[bison]: https://www.gnu.org/software/bison/
[googletest]: https://github.com/google/googletest
[bison-gnu-win32]: http://gnuwin32.sourceforge.net/packages/bison.htm