Header file inclusion static analysis tools?

Question

A colleague recently revealed to me that a single source file of ours includes over 3,400 headers during compile time. We have over 1,000 translation units that get compiled

Answer 1

I heard there are some tools do it, but I don't use them.

I created some tool https://sourceforge.net/p/headerfinder may be this is useful. Unfortunately it is "HOME MADE" tool with following issues,

• Developed in Vb.Net
• Source code need to compiled
• Very slow and consumes memory.
• No help available.

Answer 2

a few things-

• use "preprocess only" to look at your preprocessor output. gcc -E option, other compilers have the function too

• use precompiled headers.

• gcc has -verbose and --trace options which also display the full include tree, MSVC has the /showIncludes option found under Advanced C++ property page

Also, Displaying the #include hierarchy for a C++ file in Visual Studio