How to build dynamic (shared) libraries of crashpad?

Question

Crashpad is an error reporting system for c++ apps. https://chromium.googlesource.com/crashpad/crashpad/+/HEAD/doc/developing.md

build instructions are

Answer 1

@bobbyg603's answer is almost what I needed.

But as usual things are not written by hand but embedded in a script, so opening up an editor to change things is oftentimes not really useful at all. Programmatically, you can also use:

gn gen out\Default --args="extra_cflags=\"/MD\""

This will also change the arguments for cxx by the way.