I'm trying to build a cross-compiler (for an arm-based raspberry pi, if it matters), and I think I need to tell it to also search (in effect) /usr/include/arm-linux-gnueabihf/ for machine-specific header files. But I'm not sure how to. I've copied the target system's exact header tree into /usr/local/rpi/usr/local/include on my build machine. And my fledgling cross-compiler, which I configured with --with-sysroot=/usr/local/rpi, seems to be finding them there. But the copy of stdio.h there has the line #include <bits/predefs.h> in it, and that's *not* getting found, because it's in /usr/include/arm-linux-gnueabihf/bits/ on the target system, or in /usr/local/rpi//usr/include/arm-linux-gnueabihf/bits/ on my build machine. So if the native gcc on the target system knows to search there, how do I teach my cross-compiler to search there, too? Thanks in advance.
