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Spack Bootstrap Mirrors

This repository contains several Github Action workflows that are used to generate binaries to bootstrap Spack. Stable binary artifacts are tagged and released.

Purpose of this repository

Spack has some minimum requirements to work correctly. Most of them are currently system requirements i.e. they are assumed to be present on the machines where Spack is run. This is usually the case for common software found on linux systems, such as the patch or tar executables. A few less common, but critical, dependencies are instead bootstrapped by Spack if not present on the system. These are currently:

  1. clingo: needed to concretize specs
  2. GnuPG: needed to sign and verify binaries
  3. patchelf: needed to relocate binaries on linux

The purpose of this repository is to define workflows that generate binary packages suitable for bootstrapping Spack on most architectures. For completeness we report a summary of Spack requirements below:

Name Supported Versions System Requirement Requirement Reason
Python 3.6-3.13 Yes Interpreter for Spack
C/C++ compilers - Yes Building software
GNU make - Yes Building software
patch - Yes Building software
curl - Yes Fetching archives
tar - Yes Extract/create archives
gzip - Yes Archive compression
unzip - Yes Archive compression
bzip2 - Yes Archive compression
xz - Yes Archive compression
zstd - Yes Archive compression
file - Yes Binary packages
patchelf 0.13 or later No Binary packages
GnuPG 2.3 or later No Binary packages
clingo 5.5 No Concretization
git - Yes Software repositories
hg - Yes Software repositories
svn - Yes Software repositories

Supported platforms

A few different toolchains have been used to produce binaries depending on the target platform and architecture. Choices have been mainly driven by compatibility with the manylinux project.

Platform Compatibility Compiler Toolchain Architecture Python
linux glibc 2.17 or later GCC 10.2.1 x86_64 3.6-3.13
linux glibc 2.17 or later GCC 10.2.1 aarch64 3.6-3.13
linux glibc 2.17 or later GCC 10.2.1 ppc64le 3.6-3.13
darwin macOS 10.13 or later Apple Clang 15.0.0 x86_64 3.6-3.13
darwin macOS 11 or later Apple Clang 15.0.0 aarch64 3.8-3.13

Github Actions Workflows

All the linux workflows make use of a slightly customized manylinux2014 image. The customization is minimal and amounts to building multi-arch images with the same name on Github Actions.

clingo specific caveats

To avoid having runtime dependencies on libstdc++.so, clingo is linked against a static version of the runtime library.

GnuPG specific caveats

On darwin GnuPG had to be built with --disable-nls --without-libintl-prefix to avoid having binary requirements on the system libintl installed in the CI environment.