GNAT-FSF-builds

Builds of the GNAT Ada compiler from FSF GCC releases.

We aim to provide builds for various platforms on every major GCC release. There are also weekly unstable "snapshots" builds of GCC's next version, to be found in the snapshots-index branch.

How to build

To start the builds you will need python3 (up to version 3.12) and the e3-core package. This can be done in a virtual env, e.g.:

$ python3 -m venv my-virtual-env
$ source my-virtual-env/bin/activate
$ pip install e3-core==22.10.0

A Python 3.12 specific environment can be created with uv instead:

$ uv venv --python=3.12

To build a spec, for example mpc, run the anod script:

$ ./anod build mpc -v --loglevel DEBUG

-v --loglevel DEBUG will produce many information log about the build.

For a cross compiler:

$ ./anod build gcc --target=avr-elf -v --loglevel DEBUG

Building release packages can be done using the release_package spec:

$ ./anod build release_package --qualifier=package=<package name>

Currently supported package names are gnat, gprbuild and gnatprove.

On Windows

Only builds in the msys2 mingw64 environement are supported. You will need:

• mingw-w64-x86_64-python-psutil package for e3-core installation to work.

• The Unix and Windows PATH of the repo checkout must match: C:\dir1\dir2\GNAT-FSF-builds <-> \dir1\dir2\GNAT-FSF-builds. This can be done by "mounting" Windows directories in msys2, e.g.: mount C:/Users /Users.

Writing specs

Until the e3-core/anod documentation is available online, the best way to write a spec is to start from an existing one. A good starting point would be gnatcoll.anod.

• First, change the version, tarball and, source_pkg_build url
• Modify the list of build_deps, you probably need at least gcc.
• Change the configure/make options

Publishing to the Alire index

A little script is available to speedup the process of publising GNAT FSF package to the Alire index.

Edit the PKG_VERSION and CRATE_VERSION constant and then run the script to generate all the GNAT manifests. The script also checks the correctness of sha256 hashes.