nerves-toolchain

This project contains the configuration and scripts used to build the cross-compilers for the Nerves project. While pre-built toolchains exist for various hosts and targets, they don't seem to exist for the combination supported by Nerves. This project fills that gap.

Linux

Install the following packages:

sudo apt-get install TBD

Run build.sh and wait.

OSX

Install the following packages:

brew update
brew tap homebrew/dupes
brew install gawk binutils xz wget automake
brew install libtool autoconf gnu-sed mpfr gmp gcc
brew install grep -—with-default-names
brew install --universal gettext
brew link --force gettext

Run build.sh and wait.

Windows

TBD

Updating ctng config files

You may need to update the ctng configurations if gcc needs to be upgraded or the C library needs to change. The small defconfigs are stored in the configs directory and expanded automatically by build.sh to work-.../build/.config. In that directory, you can run make menuconfig to change the ctng configuration. When you're done, run make savedefconfig and copy the result to the configs directory.

Toolchain configuration notes

Glibc 2.22 has a #define change that breaks the Raspberry Pi userland (rpi-userland) package. You'll get an error that EAI_AGAIN and some other defines are missing sue to a #ifdef that changed from __USE_POSIX to _USE_XOPEN2K. Do NOT select glibc 2.22 until rpi-userland is fixed.

See https://bugs.busybox.net/show_bug.cgi?id=8446 for more details.