Action to setup a Fortran compiler.

• Usage
• Options
• Outputs
• Environment variables
• Runner compatibility
• License

This action sets up a Fortran compiler on Ubuntu, MacOS and Windows runners.

C/C++ compilers of the same toolchain/version are provided where possible, otherwise (if a standalone Fortran compiler is selected) defaulting to the preinstalled GCC.

jobs:
  test:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        toolchain:
          - {compiler: gcc, version: 11}
          - {compiler: intel-classic, version: '2021.10'}
        include:
          - os: ubuntu-latest
            toolchain: {compiler: intel, version: '2023.2'}
        exclude:
          - os: windows-latest
            toolchain: {compiler: intel-classic, version: '2021.10'}

    steps:
      - uses: fortran-lang/setup-fortran@v1
        id: setup-fortran
        with:
          compiler: ${{ matrix.toolchain.compiler }}
          version: ${{ matrix.toolchain.version }}

      - run: ${{ env.FC }} --version
        env:
          FC: ${{ steps.setup-fortran.outputs.fc }}

• compiler: Compiler toolchain to setup, available options are
  • gcc (for gfortran)
  • intel (for ifx)
  • intel-classic (for ifort)
• version: Version of the compiler toolchain. See runner compatibility charts below.

The action sets the following outputs:

• fc: Fortran compiler executable, e.g. gfortran
• cc: C compiler executable, e.g. gcc
• cxx: C++ compiler executable, e.g. g++

The same values are also set as environment variables:

• FC
• CC
• CXX

These are made available to subsequent workflow steps via the GITHUB_ENV environment file mechanism.

Toolchain support varies across GitHub-hosted runner images.

Note: on macos-13, gfortran 7-9 require flag -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib.

Note: Intel's ifx compiler is not supported on macOS, so the intel option redirects to intel-classic (ifort).

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “as is” basis, without warranties or conditions of any kind, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.