Cross compiler for the Raspberry Pi.
I have always found cross compilation to be an interesting topic. The ability to create programs for a different target than the one your building on was difficult for me to first grasp, but now understand how it works and have used it to build programs, I thought I'd give a stab and try to build a cross compiler targeted for Raspberry Pi development.
Building a cross compiler involves three systemsr the build system, the host system, and the target system. In this example, the build and host system will be my own development machine (Fedora 28). Our target system is the Raspberry Pi. The build system will be used to compile the cross compiler by using the system's native compiler to compile the GCC source code. The host system will then be used to run the cross compiler we built to compile any program we want to run on our Raspberry Pi. Sounds simple, right? Well, there are a lot of tiny details we need to cover, but that is the gist of it. Let's get started.
The build & host machine I'll be using is Fedora 28 which is running in a VirtualBox image on my Macbook Pro Retina Late 2012 (Macbook Pro 10,1)
To perform building the cross compiler I followed the following guide, modifying commands as needded (the guide was using Ubuntu as the build machine).
I owe tremendous credit to the following resource:
When building the first portion of gcc, had to modify some things before running
make install-gcc
- while in the build-gcc dir, ran:
cp -r ./build-x86_64-pc-linux-gnu/fixincludes ./ - also, modified ./fixincludes/Makefile line 37 to remove one level of
../- and line 52 to set gcc_version to
6.3.0
- and line 52 to set gcc_version to
- before running
make install-gcci had to singlely compile libiberty myself:cd libiberty && make
[STOPPING POINT] - need to continue by building (partially) glibc, then completing gcc, then completing glibc, then we should be ready!