= Updating GCC/Binutils Toolchain =

HelenOS is build using cross toolchain built from our repositories that contain modified versions of GCC and Binutils. The customization consists of the addition of HelenOS-specific targets.

The process of updating the toolchain is very similar for both GCC and binutils-gdb projects.

 * Add another Git remote with upstream development.
   * git://sourceware.org/git/binutils-gdb.git
   * git://gcc.gnu.org/git/gcc.git
 * Find a branch on the upstream with the right version.
   * binutils-2_40-branch
   * releases/gcc-13
 * Create a new branch starting on the last commit from branch from the previous step.
   * binutils-2_40-helenos
   * 13_1_1-helenos
 * Rebase changes in previous *-helenos branch onto the branch from the previous step.
   * There will be conflicts: mostly in various *config* files as new targets are added or obsoleted ones are removed. Usually resolving them is straightforward.
 * Update the version numbers in toolchain.sh.

{{{#!box type=information
= Pro-tip =
Set up the repositories in toolchain.sh to point to your local clones to speed-up the cloning. Or setup the clones in the downloads directory and comment-out all Git operations.
}}}