DOC: instructions for installing C Compiler are missing
#### Excerpt from [Contributing to pandas](https://dev.pandas.io/development/contributing.html#installing-a-c-compiler)
>Pandas uses C extensions (mostly written using Cython) to speed up certain operations. To install pandas from source, you need to compile these C extensions, which means you need a C compiler. This process depends on which platform you’re using. Follow the [CPython contributing guide](https://devguide.python.org/setup/#compile-and-build) for getting a compiler installed. You don’t need to do any of the ./configure or make steps; you only need to install the compiler.

#### Problem description

The link to CPython contributing guide doesn't explain how to set up a C Compiler.

What is needed is an OS-specific explanation for how to set up a C Compiler, or an explanation for how to check that one already has a compiler.