Gcc can't find header files

Edit: I was wrong what I posted before. stdio.h is on my system:

$ ls -l /usr/include
...
-rw-r--r--  1 root root   2799 Mar  3 20:38 stdio_ext.h
-rw-r--r--  1 root root  29665 Mar  3 20:38 stdio.h

so installing another package won’t help this. You need to either correct the path in whatever you are using or get you money back.