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.