Cross compiling a C++ program fully hermetically, from zero, using a hermetic 2 stages toolchain

by cerisier 10 months ago

macOS • xterm-256color • zsh 224 views

This showcases the current state of my project to build a fully hermetic cross-compilation c/c++ bazel toolchain.

The toolchain is made of 1 “bootstrapped” toolchain that builds all the default libs (libc (glibc stubs), libcxx, compiler-rt, CRT) and that passes include and libs artifacts to a second toolchain that takes care of building the end program.

This video shows an entire cross compilation process for a simple hello world in c++ in an environment that has no clang, no includes. Everything is cross compiled from source.

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Compiling a C++ program fully hermetically, from zero, using a hermetic 2 stages toolchain 0:49

by cerisier 10 months ago

Compiling a C++ program entirely from source (no sysroot, no hostlibs) 3:31

by cerisier 10 months ago

https://asciinema.org/a/711744

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