Preprocessor output

Question

How do I view the output produced by the C pre-processor, prior to its conversion into an object file?

I want to see what the MACRO definitions do to my code.

user_20479 · Answer

If using CLion by Jetbrains, you can use the action "clangd: Preprocess current TU"

So hit shift shift and start typing clangd...

Best assign it to a shortcut for simpler reuse in preferences->keymap:

Shout out to marcosbento

PS: TU means 'translation unit' (see here LLVM translation unit)

user_3034482 · Answer

You can check out my script described here:

It formats the preprocessor output into a (hopefully) readable html document: lines that are different due to preprocessor are marked in the file.