While adding compiled from source glew libraries in VS 2017, I encountered:
LNK4272 library machine type 'x64' conflicts with target machine type 'x86'
Here, Point 2. was really helpful !
Sourcetrail is a productivity tool for software developers on Windows, Mac and Linux. It uses static source code analysis to provide a visualization that lets you follow calls and other dependencies.
The main goal of include-what-you-use is to remove superfluous #includes. It does this both by figuring out what #includes are not actually needed for this file (for both .cc and .h files), and replacing #includes with forward-declares when possible.