CHANGELOG.md

v0.16.1 (2021-02-22)

This minor release includes a new feature and associated fixes:

• intel-oneapi support through new packages (#20411, #20686, #20693, #20717, #20732, #20808, #21377, #21448)

This release also contains bug fixes/enhancements for:

• HIP/ROCm support (#19715, #20095)
• concretization (#19988, #20020, #20082, #20086, #20099, #20102, #20128, #20182, #20193, #20194, #20196, #20203, #20247, #20259, #20307, #20362, #20383, #20423, #20473, #20506, #20507, #20604, #20638, #20649, #20677, #20680, #20790)
• environment install reporting fix (#20004)
• avoid import in ABI compatibility info (#20236)
• restore ability of dev-build to skip patches (#20351)
• spack find -d spec grouping (#20028)
• spack smoke test support (#19987, #20298)
• macOS fixes (#20038, #21662)
• abstract spec comparisons (#20341)
• continuous integration (#17563)
• performance improvements for binary relocation (#19690, #20768)
• additional sanity checks for variants in builtin packages (#20373)
• do not pollute auto-generated configuration files with empty lists or dicts (#20526)

plus assorted documentation (#20021, #20174) and package bug fixes/enhancements (#19617, #19933, #19986, #20006, #20097, #20198, #20794, #20906, #21411).

v0.16.0 (2020-11-18)

v0.16.0 is a major feature release.

Major features in this release

1. New concretizer (experimental) Our new backtracking concretizer is now in Spack as an experimental feature. You will need to install clingo@master+python and set concretizer: clingo in config.yaml to use it. The original concretizer is not exhaustive and is not guaranteed to find a solution if one exists. We encourage you to use the new concretizer and to report any bugs you find with it. We anticipate making the new concretizer the default and including all required dependencies for it in Spack v0.17. For more details, see #19501.

2. spack test (experimental) Users can add test() methods to their packages to run smoke tests on installations with the new spack test command (the old spack test is now spack unit-test). spack test is environment-aware, so you can spack install an environment and spack test run smoke tests on all of its packages. Historical test logs can be perused with spack test results. Generic smoke tests for MPI implementations, C, C++, and Fortran compilers as well as specific smoke tests for 18 packages. This is marked experimental because the test API (self.run_test()) is likely to be change, but we encourage users to upstream tests, and we will maintain and refactor any that are added to mainline packages (#15702).

3. spack develop New spack develop command allows you to develop several packages at once within a Spack environment. Running spack develop foo@v1 and spack develop bar@v2 will check out specific versions of foo and bar into subdirectories, which you can then build incrementally with spack install (#15256).

4. More parallelism Spack previously installed the dependencies of a single spec in parallel. Entire environments can now be installed in parallel, greatly accelerating builds of large environments. get parallelism from individual specs. Spack now parallelizes entire environment builds (#18131).

5. Customizable base images for spack containerize spack containerize previously only output a Dockerfile based on ubuntu. You may now specify any base image of your choosing (#15028).

6. more external finding spack external find was added in v0.15, but only cmake had support. spack external find can now find bison, cuda, findutils, flex, git, lustre m4, mpich, mvapich2, ncurses, openmpi, perl, spectrum-mpi, tar, and texinfo on your system and add them automatically to packages.yaml.

7. Support aocc, nvhpc, and oneapi compilers We are aggressively pursuing support for the newest vendor compilers, especially those for the U.S. exascale and pre-exascale systems. Compiler classes and auto-detection for aocc, nvhpc, oneapi are now in Spack (#19345, #19294, #19330).

Additional new features of note

• New spack mark command can be used to designate packages as explicitly installed, so that spack gc will not garbage-collect them (#16662).
• install_tree can be customized with Spack's projection format (#18341)
• sbang now lives in the install_tree so that all users can access it (#11598)
• csh and tcsh users no longer need to set SPACK_ROOT before sourcing setup-env.csh (#18225)
• Spec syntax now supports variant=* syntax for finding any package that has a particular variant (#19381).
• Spack respects SPACK_GNUPGHOME variable for custom GPG directories (#17139)
• Spack now recognizes Graviton chips

Major refactors

• Use spawn instead of fork on Python >= 3.8 on macOS (#18205)
• Use indexes for public build caches (#19101, #19117, #19132, #19141, #19209)
• sbang is an external package now (https://github.com/spack/sbang, #19582)
• archspec is an external package now (https://github.com/archspec/archspec, #19600)

Deprecations and Removals

• spack bootstrap was deprecated in v0.14.0, and has now been removed.
• spack setup is deprecated as of v0.16.0.
• What was spack test is now called spack unit-test. spack test is now the smoke testing feature in (2) above.

Bugfixes

Some of the most notable bugfixes in this release include:

• Better warning messages for deprecated syntax in packages.yaml (#18013)
• buildcache list --allarch now works properly (#17827)
• Many fixes and tests for buildcaches and binary relcoation (#15687, *#17455, #17418, #17455, #15687, #18110)

Package Improvements

Spack now has 5050 total packages, 720 of which were added since v0.15.

• ROCm packages (hip, aomp, more) added by AMD (#19957, #19832, others)
• Many improvements for ARM support
• llvm-flang, flang, and f18 removed, as llvm has real flang support since Flang was merged to LLVM mainline
• Emerging support for spack external find and spack test in packages.

Infrastructure

• Major infrastructure improvements to pipelines on gitlab.spack.io
• Support for testing PRs from forks (#19248) is being enabled for all forks to enable rolling, up-to-date binary builds on develop

v0.15.4 (2020-08-12)

This release contains one feature addition:

• Users can set SPACK_GNUPGHOME to override Spack's GPG path (#17139)

Several bugfixes for CUDA, binary packaging, and spack -V:

• CUDA package's .libs method searches for libcudart instead of libcuda (#18000)
• Don't set CUDAHOSTCXX in environments that contain CUDA (#17826)
• buildcache create: NoOverwriteException is a warning, not an error (#17832)
• Fix spack buildcache list --allarch (#17884)
• spack -V works with releases/latest tag and shallow clones (#17884)

And fixes for GitHub Actions and tests to ensure that CI passes on the release branch (#15687, #17279, #17328, #17377, #17732).

v0.15.3 (2020-07-28)

This release contains the following bugfixes:

• Fix handling of relative view paths (#17721)
• Fixes for binary relocation (#17418, #17455)
• Fix redundant printing of error messages in build environment (#17709)

It also adds a support script for Spack tutorials:

• Add a tutorial setup script to share/spack (#17705, #17722)

v0.15.2 (2020-07-23)

This minor release includes two new features:

• Spack install verbosity is decreased, and more debug levels are added (#17546)
• The $spack/share/spack/keys directory contains public keys that may be optionally trusted for public binary mirrors (#17684)

This release also includes several important fixes:

• MPICC and related variables are now cleand in the build environment (#17450)
• LLVM flang only builds CUDA offload components when +cuda (#17466)
• CI pipelines no longer upload user environments that can contain secrets to the internet (#17545)
• CI pipelines add bootstrapped compilers to the compiler config (#17536)
• spack buildcache list does not exit on first failure and lists later mirrors (#17565)
• Apple's "gcc" executable that is an apple-clang compiler does not generate a gcc compiler config (#17589)
• Mixed compiler toolchains are merged more naturally across different compiler suffixes (#17590)
• Cray Shasta platforms detect the OS properly (#17467)
• Additional more minor fixes.

v0.15.1 (2020-07-10)

This minor release includes several important fixes:

• Fix shell support on Cray (#17386)
• Fix use of externals installed with other Spack instances (#16954)
• Fix gcc+binutils build (#9024)
• Fixes for usage of intel-mpi (#17378 and #17382)
• Fixes to Autotools config.guess detection (#17333 and #17356)
• Update spack install message to prompt user when an environment is not explicitly activated (#17454)

This release also adds a mirror for all sources that are fetched in Spack (#17077). It is expected to be useful when the official website for a Spack package is unavailable.

v0.15.0 (2020-06-28)

v0.15.0 is a major feature release.

Major Features in this release

1. Cray support Spack will now work properly on Cray "Cluster" systems (non XC systems) and after a module purge command on Cray systems. See #12989

2. Virtual package configuration Virtual packages are allowed in packages.yaml configuration. This allows users to specify a virtual package as non-buildable without needing to specify for each implementation. See #14934

3. New config subcommands This release adds spack config add and spack config remove commands to add to and remove from yaml configuration files from the CLI. See #13920

4. Environment activation Anonymous environments are no longer automatically activated in the current working directory. To activate an environment from a spack.yaml file in the current directory, use the spack env activate . command. This removes a concern that users were too easily polluting their anonymous environments with accidental installations. See #17258

5. Apple clang compiler The clang compiler and the apple-clang compiler are now separate compilers in Spack. This allows Spack to improve support for the apple-clang compiler. See #17110

6. Finding external packages Spack packages can now support an API for finding external installations. This allows the spack external find command to automatically add installations of those packages to the user's configuration. See #15158

Additional new features of note

• support for using Spack with the fish shell (#9279)
• spack load --first option to load first match (instead of prompting user) (#15622)
• support the Cray cce compiler both new and classic versions (#17256, #12989)
• spack dev-build command:
  • supports stopping before a specified phase (#14699)
  • supports automatically launching a shell in the build environment (#14887)
• spack install --fail-fast allows builds to fail at the first error (rather than best-effort) (#15295)
• environments: SpecList references can be dereferenced as compiler or dependency constraints (#15245)
• spack view command: new support for a copy/relocate view type (#16480)
• ci pipelines: see documentation for several improvements
• spack mirror -a command now supports excluding packages (#14154)
• spack buildcache create is now environment-aware (#16580)
• module generation: more flexible format for specifying naming schemes (#16629)
• lmod module generation: packages can be configured as core specs for lmod hierarchy (#16517)

Deprecations and Removals

The following commands were deprecated in v0.13.0, and have now been removed:

• spack configure
• spack build
• spack diy

The following commands were deprecated in v0.14.0, and will be removed in the next major release:

• spack bootstrap

Bugfixes

Some of the most notable bugfixes in this release include:

• Spack environments can now contain the string -h (#15429)
• The spack install gracefully handles being backgrounded (#15723, #14682)
• Spack uses -isystem instead of -I in cases that the underlying build system does as well (#16077)
• Spack no longer prints any specs that cannot be safely copied into a Spack command (#16462)
• Incomplete Spack environments containing python no longer cause problems (#16473)
• Several improvements to binary package relocation

Package Improvements

The Spack project is constantly engaged in routine maintenance, bugfixes, and improvements for the package ecosystem. Of particular note in this release are the following:

• Spack now contains 4339 packages. There are 430 newly supported packages in v0.15.0
• GCC now builds properly on ARM architectures (#17280)
• Python: patched to support compiling mixed C/C++ python modules through distutils (#16856)
• improvements to pytorch and py-tensorflow packages
• improvements to major MPI implementations: mvapich2, mpich, openmpi, and others

Spack Project Management:

• Much of the Spack CI infrastructure has moved from Travis to GitHub Actions (#16610, #14220, #16345)
• All merges to the develop branch run E4S CI pipeline (#16338)
• New spack debug report command makes reporting bugs easier (#15834)

v0.14.2 (2020-04-15)

This is a minor release on the 0.14 series. It includes performance improvements and bug fixes:

• Improvements to how spack install handles foreground/background (#15723)
• Major performance improvements for reading the package DB (#14693, #15777)
• No longer check for the old index.yaml database file (#15298)
• Properly activate environments with '-h' in the name (#15429)
• External packages have correct .prefix in environments/views (#15475)
• Improvements to computing env modifications from sourcing files (#15791)
• Bugfix on Cray machines when getting TERM env variable (#15630)
• Avoid adding spurious LMOD env vars to Intel modules (#15778)
• Don't output [+] for mock installs run during tests (#15609)

v0.14.1 (2020-03-20)

This is a bugfix release on top of v0.14.0. Specific fixes include:

• several bugfixes for parallel installation (#15339, #15341, #15220, #15197)
• spack load now works with packages that have been renamed (#14348)
• bugfix for suite-sparse installation (#15326)
• deduplicate identical suffixes added to module names (#14920)
• fix issues with configure_args during module refresh (#11084)
• increased test coverage and test fixes (#15237, #15354, #15346)
• remove some unused code (#15431)

v0.14.0 (2020-02-23)

v0.14.0 is a major feature release, with 3 highlighted features:

1. Distributed builds. Multiple Spack instances will now coordinate properly with each other through locks. This works on a single node (where you've called spack several times) or across multiple nodes with a shared filesystem. For example, with SLURM, you could build trilinos and its dependencies on 2 24-core nodes, with 3 Spack instances per node and 8 build jobs per instance, with srun -N 2 -n 6 spack install -j 8 trilinos. This requires a filesystem with locking enabled, but not MPI or any other library for parallelism.

2. Build pipelines. You can also build in parallel through Gitlab CI. Simply create a Spack environment and push it to Gitlab to build on Gitlab runners. Pipeline support is now integrated into a single spack ci command, so setting it up is easier than ever. See the Pipelines section in the docs.

3. Container builds. The new spack containerize command allows you to create a Docker or Singularity recipe from any Spack environment. There are options to customize the build if you need them. See the Container Images section in the docs.

In addition, there are several other new commands, many bugfixes and improvements, and spack load no longer requires modules, so you can use it the same way on your laptop or on your supercomputer.

Spack grew by over 300 packages since our last release in November 2019, and the project grew to over 500 contributors. Thanks to all of you for making yet another great release possible. Detailed notes below.

Major new core features

• Distributed builds: spack instances coordinate and build in parallel (#13100)
• New spack ci command to manage CI pipelines (#12854)
• Generate container recipes from environments: spack containerize (#14202)
• spack load now works without using modules (#14062, #14628)
• Garbage collect old/unused installations with spack gc (#13534)
• Configuration files all set environment modifications the same way (#14372, docs)
• spack commands --format=bash auto-generates completion (#14393, #14607)
• Packages can specify alternate fetch URLs in case one fails (#13881)

Improvements

• Improved locking for concurrency with environments (#14676, #14621, #14692)
• spack test sends args to pytest, supports better listing (#14319)
• Better support for aarch64 and cascadelake microarch (#13825, #13780, #13820)
• Archspec is now a separate library (see https://github.com/archspec/archspec)
• Many improvements to the spack buildcache command (#14237, #14346, #14466, #14467, #14639, #14642, #14659, #14696, #14698, #14714, #14732, #14929, #15003, #15086, #15134)

Selected Bugfixes

• Compilers now require an exact match on version (#8735, #14730, #14752)
• Bugfix for patches that specified specific versions (#13989)
• spack find -p now works in environments (#10019, #13972)
• Dependency queries work correctly in spack find (#14757)
• Bugfixes for locking upstream Spack instances chains (#13364)
• Fixes for PowerPC clang optimization flags (#14196)
• Fix for issue with compilers and specific microarchitectures (#13733, #14798)

New commands and options

• spack ci (#12854)
• spack containerize (#14202)
• spack gc (#13534)
• spack load accepts --only package, --only dependencies (#14062, #14628)
• spack commands --format=bash (#14393)
• spack commands --update-completion (#14607)
• spack install --with-cache has new option: --no-check-signature (#11107)
• spack test now has --list, --list-long, and --list-names (#14319)
• spack install --help-cdash moves CDash help out of the main help (#13704)

Deprecations

• spack release-jobs has been rolled into spack ci
• spack bootstrap will be removed in a future version, as it is no longer needed to set up modules (see spack load improvements above)

Documentation

• New section on building container images with Spack (see docs)
• New section on using spack ci command to build pipelines (see docs)
• Document how to add conditional dependencies (#14694)
• Document how to use Spack to replace Homebrew/Conda (#13083, see docs)

Important package changes

• 3,908 total packages (345 added since 0.13.0)
• Added first cut at a TensorFlow package (#13112)
• We now build R without "recommended" packages, manage them w/Spack (#12015)
• Elpa and OpenBLAS now leverage microarchitecture support (#13655, #14380)
• Fix octave compiler wrapper usage (#14726)
• Enforce that packages in builtin aren't missing dependencies (#13949)

v0.13.4 (2020-02-07)

This release contains several bugfixes:

• bugfixes for invoking python in various environments (#14349, #14496, #14569)
• brought tab completion up to date (#14392)
• bugfix for removing extensions from views in order (#12961)
• bugfix for nondeterministic hashing for specs with externals (#14390)

v0.13.3 (2019-12-23)

This release contains more major performance improvements for Spack environments, as well as bugfixes for mirrors and a python issue with RHEL8.

• mirror bugfixes: symlinks, duplicate patches, and exception handling (#13789)
• don't try to fetch BundlePackages (#13908)
• avoid re-fetching patches already added to a mirror (#13908)
• avoid re-fetching already added patches (#13908)
• avoid re-fetching already added patches (#13908)
• allow repeated invocations of spack mirror create on the same dir (#13908)
• bugfix for RHEL8 when python is unavailable (#14252)
• improve concretization performance in environments (#14190)
• improve installation performance in environments (#14263)

v0.13.2 (2019-12-04)

This release contains major performance improvements for Spack environments, as well as some bugfixes and minor changes.

• allow missing modules if they are blacklisted (#13540)
• speed up environment activation (#13557)
• mirror path works for unknown versions (#13626)
• environments: don't try to modify run-env if a spec is not installed (#13589)
• use semicolons instead of newlines in module/python command (#13904)
• verify.py: os.path.exists exception handling (#13656)
• Document use of the maintainers field (#13479)
• bugfix with config caching (#13755)
• hwloc: added 'master' version pointing at the HEAD of the master branch (#13734)
• config option to allow gpg warning suppression (#13744)
• fix for relative symlinks when relocating binary packages (#13727)
• allow binary relocation of strings in relative binaries (#13724)

v0.13.1 (2019-11-05)

This is a bugfix release on top of v0.13.0. Specific fixes include:

• spack find now displays variants and other spec constraints
• bugfix: uninstall should find concrete specs by DAG hash (#13598)
• environments: make shell modifications partially unconditional (#13523)
• binary distribution: relocate text files properly in relative binaries (#13578)
• bugfix: fetch prefers to fetch local mirrors over remote resources (#13545)
• environments: only write when necessary (#13546)
• bugfix: spack.util.url.join() now handles absolute paths correctly (#13488)
• sbang: use utf-8 for encoding when patching (#13490)
• Specs with quoted flags containing spaces are parsed correctly (#13521)
• targets: print a warning message before downgrading (#13513)
• Travis CI: Test Python 3.8 (#13347)
• Documentation: Database.query methods share docstrings (#13515)
• cuda: fix conflict statements for x86-64 targets (#13472)
• cpu: fix clang flags for generic x86_64 (#13491)
• syaml_int type should use int.repr rather than str.repr (#13487)
• elpa: prefer 2016.05.004 until sse/avx/avx2 issues are resolved (#13530)
• trilinos: temporarily constrain netcdf@:4.7.1 (#13526)

v0.13.0 (2019-10-25)

v0.13.0 is our biggest Spack release yet, with many new major features. From facility deployment to improved environments, microarchitecture support, and auto-generated build farms, this release has features for all of our users.

Spack grew by over 700 packages in the past year, and the project now has over 450 contributors. Thanks to all of you for making this release possible.

Major new core features

• Chaining: use dependencies from external "upstream" Spack instances
• Environments now behave more like virtualenv/conda
  • Each env has a view: a directory with all packages symlinked in
  • Activating an environment sets PATH, LD_LIBRARY_PATH, CPATH, CMAKE_PREFIX_PATH, PKG_CONFIG_PATH, etc. to point to this view.
• Spack detects and builds specifically for your microarchitecture
  • named, understandable targets like skylake, broadwell, power9, zen2
  • Spack knows which compilers can build for which architectures
  • Packages can easily query support for features like avx512 and sse3
  • You can pick a target with, e.g. spack install foo target=icelake
• Spack stacks: combinatorial environments for facility deployment
  • Environments can now build cartesian products of specs (with matrix:)
  • Conditional syntax support to exclude certain builds from the stack
• Projections: ability to build easily navigable symlink trees environments
• Support no-source packages (BundlePackage) to aggregate related packages
• Extensions: users can write custom commands that live outside of Spack repo
• Support ARM and Fujitsu compilers

CI/build farm support

• spack release-jobs can detect package.py changes and generate .gitlab-ci.yml to create binaries for an environment or stack in parallel (initial support -- will change in future release).
• Results of build pipelines can be uploaded to a CDash server.
• Spack can now upload/fetch from package mirrors in Amazon S3

New commands/options

• spack mirror create --all downloads all package sources/resources/patches
• spack dev-build runs phases of the install pipeline on the working directory
• spack deprecate permanently symlinks an old, unwanted package to a new one
• spack verify chcecks that packages' files match what was originally installed
• spack find --json prints JSON that is easy to parse with, e.g. jq
• spack find --format FORMAT allows you to flexibly print package metadata
• spack spec --json prints JSON version of spec.yaml

Selected improvements

• Auto-build requested compilers if they do not exist
• Spack automatically adds RPATHs needed to make executables find compiler runtime libraries (e.g., path to newer libstdc++ in icpc or g++)
• setup-env.sh is now compatible with Bash, Dash, and Zsh
• Spack now caps build jobs at min(16, ncores) by default
• spack compiler find now also throttles number of spawned processes
• Spack now writes stage directories directly to $TMPDIR instead of symlinking stages within $spack/var/spack/cache.
• Improved and more powerful spec format strings
• You can pass a spec.yaml file anywhere in the CLI you can type a spec.
• Many improvements to binary caching
• Gradually supporting new features from Environment Modules v4
• spack edit respects VISUAL environment variable
• Simplified package syntax for specifying build/run environment modifications
• Numerous improvements to support for environments across Spack commands
• Concretization improvements

Documentation

• Multi-lingual documentation (Started a Japanese translation)
• Tutorial now has its own site at spack-tutorial.readthedocs.io
  • This enables us to keep multiple versions of the tutorial around

Deprecations

• Spack no longer supports dotkit (LLNL's homegrown, now deprecated module tool)
• spack build, spack configure, spack diy deprecated in favor of spack dev-build and spack install

Important package changes

• 3,563 total packages (718 added since 0.12.1)
• Spack now defaults to Python 3 (previously preferred 2.7 by default)
• Much improved ARM support thanks to Fugaku (RIKEN) and SNL teams
• Support new special versions: master, trunk, and head (in addition to develop)
• Better finding logic for libraries and headers

v0.12.1 (2018-11-13)

This is a minor bugfix release, with a minor fix in the tutorial and a flake8 fix.

Bugfixes

• Add r back to regex strings in binary distribution
• Fix gcc install version in the tutorial

v0.12.0 (2018-11-13)

Major new features

• Spack environments
• spack.yaml and spack.lock files for tracking dependencies
• Custom configurations via command line
• Better support for linking Python packages into view directories
• Packages have more control over compiler flags via flag handlers
• Better support for module file generation
• Better support for Intel compilers, Intel MPI, etc.
• Many performance improvements, improved startup time

License

• As of this release, all of Spack is permissively licensed under Apache-2.0 or MIT, at the user's option.
• Consents from over 300 contributors were obtained to make this relicense possible.
• Previous versions were distributed under the LGPL license, version 2.1.

New packages

Over 2,900 packages (800 added since last year)

Spack would not be possible without our community. Thanks to all of our contributors for the new features and packages in this release!

v0.11.2 (2018-02-07)

This release contains the following fixes:

• Fixes for gfortran 7 compiler detection (#7017)
• Fixes for exceptions thrown during module generation (#7173)

v0.11.1 (2018-01-19)

This release contains bugfixes for compiler flag handling. There were issues in v0.11.0 that caused some packages to be built without proper optimization.

Fixes:

• Issue #6999: FFTW installed with Spack 0.11.0 gets built without optimisations

Includes:

• PR #6415: Fixes for flag handling behavior
• PR #6960: Fix type issues with setting flag handlers
• 880e319: Upstream fixes to list_url in various R packages

v0.11.0 (2018-01-17)

Spack v0.11.0 contains many improvements since v0.10.0. Below is a summary of the major features, broken down by category.

New packages

• Spack now has 2,178 packages (from 1,114 in v0.10.0)
• Many more Python packages (356) and R packages (471)
• 48 Exascale Proxy Apps (try spack list -t proxy-app)

Core features for users

• Relocatable binary packages (spack buildcache, #4854)
• Spack now fully supports Python 3 (#3395)
• Packages can be tagged and searched by tags (#4786)
• Custom module file templates using Jinja (#3183)
• spack bootstrap command now sets up a basic module environment (#3057)
• Simplified and better organized help output (#3033)
• Improved, less redundant spack install output (#5714, #5950)
• Reworked spack dependents and spack dependencies commands (#4478)

Major new features for packagers

• Multi-valued variants (#2386)
• New conflicts() directive (#3125)
• New dependency type: test dependencies (#5132)
• Packages can require their own patches on dependencies (#5476)
  • depends_on(..., patches=<patch list>)
• Build interface for passing linker information through Specs (#1875)
  • Major packages that use blas/lapack now use this interface
• Flag handlers allow packages more control over compiler flags (#6415)
• Package subclasses support many more build systems:
  • autotools, perl, qmake, scons, cmake, makefile, python, R, WAF
  • package-level support for installing Intel HPC products (#4300)
• spack blame command shows contributors to packages (#5522)
• spack create now guesses many more build systems (#2707)
• Better URL parsing to guess package version URLs (#2972)
• Much improved PythonPackage support (#3367)

Core

• Much faster concretization (#5716, #5783)
• Improved output redirection (redirecting build output works properly #5084)
• Numerous improvements to internal structure and APIs

Tutorials & Documentation

• Many updates to documentation
• New tutorial material from SC17
  • configuration
  • build systems
  • build interface
  • working with module generation
• Documentation on docker workflows and best practices

Selected improvements and bug fixes

• No longer build Python eggs -- installations are plain directories (#3587)
• Improved filtering of system paths from build PATHs and RPATHs (#2083, #3910)
• Git submodules are properly handled on fetch (#3956)
• Can now set default number of parallel build jobs in config.yaml
• Improvements to setup-env.csh (#4044)
• Better default compiler discovery on Mac OS X (#3427)
  • clang will automatically mix with gfortran
• Improved compiler detection on Cray machines (#3075)
• Better support for IBM XL compilers
• Better tab completion
• Resume gracefully after prematurely terminated partial installs (#4331)
• Better mesa support (#5170)

Spack would not be possible without our community. Thanks to all of our contributors for the new features and packages in this release!

v0.10.0 (2017-01-17)

This is Spack v0.10.0. With this release, we will start to push Spack releases more regularly. This is the last Spack release without automated package testing. With the next release, we will begin to run package tests in addition to unit tests.

Spack has grown rapidly from 422 to 1,114 packages, thanks to the hard work of over 100 contributors. Below is a condensed version of all the changes since v0.9.1.

Packages

• Grew from 422 to 1,114 packages
  • Includes major updates like X11, Qt
  • Expanded HPC, R, and Python ecosystems

Core

• Major speed improvements for spack find and concretization
• Completely reworked architecture support
  • Platforms can have front-end and back-end OS/target combinations
  • Much better support for Cray and BG/Q cross-compiled environments
• Downloads are now cached locally
• Support installations in deeply nested directories: patch long shebangs using sbang

Basic usage

• Easier global configuration via config.yaml
  • customize install, stage, and cache locations
• Hierarchical configuration scopes: default, site, user
  • Platform-specific scopes allow better per-platform defaults
• Ability to set cflags, cxxflags, fflags on the command line
• YAML-configurable support for both Lmod and tcl modules in mainline
• spack install supports --dirty option for emergencies

For developers

• Support multiple dependency types: build, link, and run
• Added Package base classes for custom build systems
  • AutotoolsPackage, CMakePackage, PythonPackage, etc.
  • spack create now guesses many more build systems
• Development environment integration with spack setup
• New interface to pass linking information via spec objects
  • Currently used for BLAS/LAPACK/SCALAPACK libraries
  • Polymorphic virtual dependency attributes: spec['blas'].blas_libs

Testing & Documentation

• Unit tests run continuously on Travis CI for Mac and Linux
• Switched from nose to pytest for unit tests.
  • Unit tests take 1 minute now instead of 8
• Massively expanded documentation
• Docs are now hosted on spack.readthedocs.io