Merge branch 'main' into pthreads-mingw

README.md

@@ -164,13 +164,15 @@ API in your project.
 For building, testing, and profiling Shaderc, the following tools should be
 installed regardless of your OS:
 
+- A C++17 compiler. Recent versions of Clang, GCC, and MSVC work.
 - [CMake](http://www.cmake.org/) 3.14 or later: for generating compilation targets.
     - Shaderc is tested with cmake 3.17.2
 - [Python 3](http://www.python.org/): for utility scripts and running the test suite.
 
 On Linux, if cross compiling to Windows:
 - [`mingw`](http://www.mingw.org): A GCC-based cross compiler targeting Windows
     so that generated executables use the Microsoft C runtime libraries.
+    The MinGW compiler must support C++17.
 
 On Windows, the following tools should be installed and available on your path: