Question

So we have for example ffmpeg that can be compiled into > than 4 libraries. Is it possible using GCC to compile\collect not into .a or .so libraries but into some wary large one C files?

Answer 1

Funny question, why would you want to do this? Anyway, you can try and see whether gcc -E does what you want – it only invokes the preprocessor. So you might have to adapt the source code to include other source code files.

MiLu@Dago: ~ > cat x.c
int x_num() {
        return 7;
}
MiLu@Dago: ~ > cat moin.c
#include <stdio.h>
#include "x.c"
int main() {
        printf("moin: %d\n", x_num());
        return 0;
}
MiLu@Dago: ~ > gcc -E moin.c | wc -l
1150

I think I’d rather try the cat utility:

find -type f -name \*.c | xargs cat > all_my.c

Still, what are you trying to achieve?