4ce80b95f3
Currently there's some hacky logic in the AppleClang compiler that makes
it also accept `gfortran` as a fortran compiler if `flang` is not found.
This is guarded by `if sys.platform` checks s.t. it only applies to
Darwin.
But on Linux the feature of detecting mixed toolchains is highly
requested too, cause it's rather annoying to run into a failed build of
`openblas` after dozens of minutes of compiling its dependencies, just
because clang doesn't have a fortran compiler.
In particular in CI where the system compilers may change during system
updates, it's typically impossible to fix compilers in a hand-written
compilers.yaml config file: the config will almost certainly be outdated
sooner or later, and maintaining one config file per target machine and
writing logic to select the correct config is rather undesirable too.
---
This PR introduces a flag `spack compiler find --mixed-toolchain` that
fills out missing `fc` and `f77` entries in `clang` / `apple-clang` by
picking the best matching `gcc`.
It is enabled by default on macOS, but not on Linux, matching current
behavior of `spack compiler find`.
The "best matching gcc" logic and compiler path updates are identical to
how compiler path dictionaries are currently flattened "horizontally"
(per compiler id). This just adds logic to do the same "vertically"
(across different compiler ids).
So, with this change on Ubuntu 22.04:
```
$ spack compiler find --mixed-toolchain
==> Added 6 new compilers to /home/harmen/.spack/linux/compilers.yaml
gcc@13.1.0 gcc@12.3.0 gcc@11.4.0 gcc@10.5.0 clang@16.0.0 clang@15.0.7
==> Compilers are defined in the following files:
/home/harmen/.spack/linux/compilers.yaml
```
you finally get:
```
compilers:
- compiler:
spec: clang@=15.0.7
paths:
cc: /usr/bin/clang
cxx: /usr/bin/clang++
f77: /usr/bin/gfortran
fc: /usr/bin/gfortran
flags: {}
operating_system: ubuntu23.04
target: x86_64
modules: []
environment: {}
extra_rpaths: []
- compiler:
spec: clang@=16.0.0
paths:
cc: /usr/bin/clang-16
cxx: /usr/bin/clang++-16
f77: /usr/bin/gfortran
fc: /usr/bin/gfortran
flags: {}
operating_system: ubuntu23.04
target: x86_64
modules: []
environment: {}
extra_rpaths: []
```
The "best gcc" is automatically default system gcc, since it has no
suffixes / prefixes.
|
||
|---|---|---|
| .github | ||
| bin | ||
| etc/spack/defaults | ||
| lib/spack | ||
| share/spack | ||
| var/spack | ||
| .codecov.yml | ||
| .dockerignore | ||
| .flake8 | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .readthedocs.yml | ||
| CHANGELOG.md | ||
| CITATION.cff | ||
| COPYRIGHT | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| NOTICE | ||
| pyproject.toml | ||
| pytest.ini | ||
| README.md | ||
| SECURITY.md | ||
Spack
Spack is a multi-platform package manager that builds and installs multiple versions and configurations of software. It works on Linux, macOS, and many supercomputers. Spack is non-destructive: installing a new version of a package does not break existing installations, so many configurations of the same package can coexist.
Spack offers a simple "spec" syntax that allows users to specify versions and configuration options. Package files are written in pure Python, and specs allow package authors to write a single script for many different builds of the same package. With Spack, you can build your software all the ways you want to.
See the Feature Overview for examples and highlights.
To install spack and your first package, make sure you have Python. Then:
$ git clone -c feature.manyFiles=true https://github.com/spack/spack.git
$ cd spack/bin
$ ./spack install zlib
Documentation
Full documentation is available, or
run spack help or spack help --all.
For a cheat sheet on Spack syntax, run spack help --spec.
Tutorial
We maintain a hands-on tutorial. It covers basic to advanced usage, packaging, developer features, and large HPC deployments. You can do all of the exercises on your own laptop using a Docker container.
Feel free to use these materials to teach users at your organization about Spack.
Community
Spack is an open source project. Questions, discussion, and contributions are welcome. Contributions can be anything from new packages to bugfixes, documentation, or even new core features.
Resources:
- Slack workspace: spackpm.slack.com. To get an invitation, visit slack.spack.io.
- Matrix space: #spack-space:matrix.org: bridged to Slack.
- Github Discussions: not just for discussions, but also Q&A.
- Mailing list: groups.google.com/d/forum/spack
- Twitter: @spackpm. Be sure to
@mentionus!
Contributing
Contributing to Spack is relatively easy. Just send us a
pull request.
When you send your request, make develop the destination branch on the
Spack repository.
Your PR must pass Spack's unit tests and documentation tests, and must be PEP 8 compliant. We enforce these guidelines with our CI process. To run these tests locally, and for helpful tips on git, see our Contribution Guide.
Spack's develop branch has the latest contributions. Pull requests
should target develop, and users who want the latest package versions,
features, etc. can use develop.
Releases
For multi-user site deployments or other use cases that need very stable software installations, we recommend using Spack's stable releases.
Each Spack release series also has a corresponding branch, e.g.
releases/v0.14 has 0.14.x versions of Spack, and releases/v0.13 has
0.13.x versions. We backport important bug fixes to these branches but
we do not advance the package versions or make other changes that would
change the way Spack concretizes dependencies within a release branch.
So, you can base your Spack deployment on a release branch and git pull
to get fixes, without the package churn that comes with develop.
The latest release is always available with the releases/latest tag.
See the docs on releases for more details.
Code of Conduct
Please note that Spack has a Code of Conduct. By participating in the Spack community, you agree to abide by its rules.
Authors
Many thanks go to Spack's contributors.
Spack was created by Todd Gamblin, tgamblin@llnl.gov.
Citing Spack
If you are referencing Spack in a publication, please cite the following paper:
- Todd Gamblin, Matthew P. LeGendre, Michael R. Collette, Gregory L. Lee, Adam Moody, Bronis R. de Supinski, and W. Scott Futral. The Spack Package Manager: Bringing Order to HPC Software Chaos. In Supercomputing 2015 (SC’15), Austin, Texas, November 15-20 2015. LLNL-CONF-669890.
On GitHub, you can copy this citation in APA or BibTeX format via the "Cite this repository"
button. Or, see the comments in CITATION.cff for the raw BibTeX.
License
Spack is distributed under the terms of both the MIT license and the Apache License (Version 2.0). Users may choose either license, at their option.
All new contributions must be made under both the MIT and Apache-2.0 licenses.
See LICENSE-MIT, LICENSE-APACHE, COPYRIGHT, and NOTICE for details.
SPDX-License-Identifier: (Apache-2.0 OR MIT)
LLNL-CODE-811652