ci/build.windows.gitlab-ci.yml

# Base configuration for windows builds.
# SPDX-FileCopyrightText: The Eigen Authors
# SPDX-License-Identifier: MPL-2.0
.build:windows:
  needs: []
  extends: [ .common:windows, .artifacts:windows:builddir ]
  stage: build
  variables:
    EIGEN_CI_BUILD_TARGET: buildtests
    # Reduce overall build size and compile time.
    # Note: -d2ReducedOptimizeHugeFunctions (VS 2019+) uses '-' rather than '/'
    # because sccache treats unrecognized '/...' arguments as input file paths.
    EIGEN_CI_TEST_CUSTOM_CXX_FLAGS: "-d2ReducedOptimizeHugeFunctions;-DEIGEN_STRONG_INLINE=inline;-Os"
    # "off" disables the ccache compiler launchers (see
    # build.windows.script.ps1). The script downloads a pinned,
    # SHA-256-verified ccache when the runner has none; if that also fails,
    # the job builds exactly as before.
    EIGEN_CI_CCACHE: "on"
    # cache:policy of the .ccache/ pool; see the Linux build template.
    EIGEN_CI_CCACHE_POLICY: pull-push
    EIGEN_CI_CCACHE_DIR: ${CI_PROJECT_DIR}/.ccache
    # Runner-local cache, so no archive-size limit applies; 4G holds a full
    # MSVC buildtests run with headroom and only bounds runner disk use.
    EIGEN_CI_CCACHE_MAXSIZE: 4G
    # Hash compile paths relative to the project directory: absolute paths are
    # part of ccache's hash, so without this a checkout-path change (runner
    # layout, concurrent build slots) turns every compile into a miss.
    EIGEN_CI_CCACHE_BASEDIR: ${CI_PROJECT_DIR}
    # Don't re-compress the already-zstd-compressed ccache payload when
    # archiving; see the Linux build template for the measured rationale.
    FF_USE_FASTZIP: "true"
    CACHE_COMPRESSION_LEVEL: "fastest"
    # ccache pool name; see the Linux build template.
    EIGEN_CI_CCACHE_POOL: $CI_JOB_NAME_SLUG
  script:
     - ./ci/scripts/build.windows.script.ps1
  after_script: !reference [.windows:stop-sccache, script]
  tags:
    - eigen-runner
    - windows
    - x86-64
  rules: !reference [.rules:libeigen:all-tests, rules]
  # Cache the ccache directory, not ${EIGEN_CI_BUILDDIR}, mirroring
  # build.linux.gitlab-ci.yml: ccache keys on file content and compiler, so
  # hits survive a re-checkout that re-stamps every source mtime (which made
  # the old build-directory cache rebuild everything anyway). Deliberately not
  # scoped by EIGEN_CI_CCACHE_SCOPE the way the Linux template is: the Windows
  # runner has no shared cache server, so every archive is runner-local and
  # nothing ever evicts one. Shared pools are bounded at one archive per job;
  # per-merge-request pools would grow without bound, by four MSVC pools per
  # `all-tests` merge request (22 of them in the 60 days to 2026-09-03), for
  # little gain -- Windows builds run only under a label, so a merge request
  # seldom builds here twice. Keys stay split by GitLab's protection suffix as
  # described in the Linux template. Both entries push even when the build fails
  # (when: always): the retry pipeline after a compile error is exactly where
  # hits matter most.
  cache:
    # The pinned sccache/ccache binaries the build script downloads when the runner has
    # none; one shared key so a runner downloads it once for all build jobs.
    # Cache content is writable job output, not a trusted source: the script
    # re-verifies the binary's SHA-256 on every use before executing it.
    - key: "windows-ccache-bin"
      paths:
        - .ccache-bin/
        - .sccache-bin/
      when: always
    - key: "$EIGEN_CI_CCACHE_POOL-ccache"
      paths:
        - .ccache/
        - .sccache/
      policy: $EIGEN_CI_CCACHE_POLICY
      when: always

######### MSVC #################################################################

# MSVC 14.29 (VS 2019) 32 bit

build:windows:x86:msvc-14.29:default:
  extends: .build:windows
  variables:
    EIGEN_CI_MSVC_ARCH: "x64_x86"

# MSVC 14.29 (VS 2019) 64 bit

build:windows:x86-64:msvc-14.29:default:
  extends: .build:windows

build:windows:x86-64:msvc-14.29:avx2:
  extends: .build:windows
  variables:
    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX2=on"

build:windows:x86-64:msvc-14.29:avx512dq:
  extends: .build:windows
  variables:
    EIGEN_CI_ADDITIONAL_ARGS: "-DEIGEN_TEST_AVX512DQ=on"


# MSVC 14.29 (VS 2019) + CUDA

.build:windows:cuda:
  extends: .build:windows
  # The .cu compiles reach the launcher through CMAKE_CUDA_COMPILER_LAUNCHER;
  # see the Linux CUDA template for the rationale.
  variables:
    # The GPU in the Windows CUDA runner (eigen-windows-testing-001.gcloud) is
    # a Tesla L4, sm_89.  Eigen has no architecture-dependent device code
    # between sm_75 and sm_89, so a second architecture would only double the
    # device compile time on a single self-hosted runner.  CUDA 13 dropped
    # offline compilation for Volta and older; nothing below sm_75 can be
    # listed here any more.
    EIGEN_CI_CUDA_COMPUTE_ARCH: "89"
    EIGEN_CI_BUILD_TARGET: buildtests_gpu
    EIGEN_CI_ADDITIONAL_ARGS:
      -DEIGEN_TEST_CUDA=on
      -DEIGEN_CUDA_COMPUTE_ARCH=${EIGEN_CI_CUDA_COMPUTE_ARCH}
  # Name the GPU and driver on this runner first; the arch list above has to
  # match it.
  before_script:
    - nvidia-smi
    - . ci/scripts/common.windows.before_script.ps1
  rules: !reference [.rules:libeigen:gpu, rules]
  tags:
    - eigen-runner
    - windows
    - x86-64
    - cuda

# MSVC 14.29 + CUDA 13.0
build:windows:x86-64:cuda-13.0:msvc-14.29:
  extends: .build:windows:cuda
  variables:
    # Pin the toolkit and fail when it is absent.  With CUDA_PATH empty,
    # FindCUDA falls through to whichever nvcc is first on PATH and the job
    # silently builds with a toolkit other than the one in its name.
    EIGEN_CI_BEFORE_SCRIPT: >-
      if (-not $$env:CUDA_PATH_V13_0) { throw 'CUDA 13.0 is not installed on this runner' };
      $$env:CUDA_PATH=$$env:CUDA_PATH_V13_0

######### MR Affected Tests ####################################################
# Opt-in via `affected-tests` plus `windows-tests` or `all-platforms`; see
# .rules:libeigen:affected-tests:windows in ci/common.gitlab-ci.yml.  Only MSVC
# x64 at baseline ISA; the wider Windows matrix stays in `all-tests`.

build:windows:x86-64:msvc-14.29:default:affected:
  extends: [ build:windows:x86-64:msvc-14.29:default, .affected:build ]
  variables:
    EIGEN_CI_CCACHE_POOL: build-windows-x86-64-msvc-14-29-default
  rules: !reference [.rules:libeigen:affected-tests:windows, rules]