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How to partially pre-process a file, without expanding #include or #embed ?

I'm debugging some "clever" macros 
(similar to, but not exactly the same as, X macros https://software.codidact.com/posts/293492
).

Is there a way to get a compiler or a preprocessor (such as `gcc` or `cpp` or `gpp`) to expand only "short" macros and leave "long" preprocessor stuff alone? so if I have something like

    #include <enormous_library>
    #include <some_other_library>
    #embed "embedded_literals.txt"

    int main(void){
        set_baud_rate(baud_rate)
    }

and one of those libraries mentions

    #define baud_rate 1200

I want to somehow generate a (relatively short) partially-preprocessed file something like

    #include <enormous_library>
    #include <some_other_library>
    #embed "embedded_literals.txt"

    int main(void){
        set_baud_rate(1200)
    }

The

    gcc -save-temps 

option tells gcc to expand *all* the preprocessor stuff into an enormous file with a copy of all the libraries and embedded literals, which can make what I'm looking for hard to find.