Various enhancements (#44)

* expand/automate compatibility testing in weekly workflow
* consolidate gcc and intel compatibility tables in README.md
* only test latest toolchain versions on each platform on push/pr
* update README wording to reflect support for standalone compilers
* install g++ separately on ubuntu (not included with gcc-13 via APT)
* support gcc 13 via chocolatey mingw on windows
* bump default gcc from 11 to 13 (supported on all 3 platforms)
* set cxx output and env var consistently
* test compiling C/C++ programs

README.md

@@ -25,6 +25,8 @@ Action to setup a Fortran compiler.
 
 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.
+
 ```yaml
 jobs:
   test:
@@ -65,56 +67,45 @@ jobs:
 - *version*: Version of the compiler toolchain. See [runner compatibility](#runner-compatibility) charts below.
 
 
-
 ## Outputs
 
 The action sets the following outputs:
 
-- `cc`: C compiler executable, e.g. `gcc`
 - `fc`: Fortran compiler executable, e.g. `gfortran`
+- `cc`: C compiler executable, e.g. `gcc`
+- `cxx`: C++ compiler executable, e.g. `g++`
 
 
 ## Environment variables
 
 The same values are also set as environment variables:
 
-- `CC`
 - `FC`
+- `CC`
+- `CXX`
 
 These are made available to subsequent workflow steps via the [`GITHUB_ENV` environment file mechanism](https://docs.github.com/en/actions/learn-github-actions/environment-variables#passing-values-between-steps-and-jobs-in-a-workflow).
 
 
 ## Runner compatibility
 
-Support for the GCC toolchain varies across GitHub-hosted runner images.
+Toolchain support varies across GitHub-hosted runner images.
 
 <!-- compat starts -->
-| runner       | 6       | 7       | 8       | 9       | 10      | 11      | 12      | 13      |
-|:-------------|:--------|:--------|:--------|:--------|:--------|:--------|:--------|:--------|
-| macos-11     | &check; | &check; | &check; | &check; | &check; | &check; | &check; | &check; |
-| macos-12     | &check; | &check; | &check; | &check; | &check; | &check; | &check; | &check; |
-| macos-13     |      | &check; | &check; | &check; | &check; | &check; | &check; | &check; |
-| ubuntu-20.04 |      | &check; | &check; | &check; | &check; | &check; |      | &check; |
-| ubuntu-22.04 |      |      |      | &check; | &check; | &check; | &check; | &check; |
-| windows-2019 |      |      | &check; | &check; | &check; | &check; | &check; |      |
-| windows-2022 |      |      | &check; | &check; | &check; | &check; | &check; |      |
+| runner       | gcc 10   | gcc 11   | gcc 12   | gcc 13   | gcc 6   | gcc 7   | gcc 8   | gcc 9   | intel-classic 2021.1.2   | intel-classic 2021.1   | intel-classic 2021.10   | intel-classic 2021.2   | intel-classic 2021.3   | intel-classic 2021.4   | intel-classic 2021.5   | intel-classic 2021.6   | intel-classic 2021.7.1   | intel-classic 2021.7   | intel-classic 2021.8   | intel-classic 2021.9   | intel 2021.1.2   | intel 2021.1   | intel 2021.2   | intel 2021.4   | intel 2022.0   | intel 2022.1   | intel 2022.2.1   | intel 2022.2   | intel 2023.0   | intel 2023.1   | intel 2023.2   |
+|:-------------|:----------------|:----------------|:----------------|:----------------|:---------------|:---------------|:---------------|:---------------|:--------------------------------|:------------------------------|:-------------------------------|:------------------------------|:------------------------------|:------------------------------|:------------------------------|:------------------------------|:--------------------------------|:------------------------------|:------------------------------|:------------------------------|:------------------------|:----------------------|:----------------------|:----------------------|:----------------------|:----------------------|:------------------------|:----------------------|:----------------------|:----------------------|:----------------------|
+| macos-11     | &check;         | &check;         | &check;         | &check;         | &check;        | &check;        | &check;        | &check;        |                              | &check;                       | &check;                        | &check;                       | &check;                       | &check;                       | &check;                       | &check;                       | &check;                         | &check;                       | &check;                       | &check;                       |                      |                    |                    |                    |                    |                    |                      |                    |                    |                    |                    |
+| macos-12     | &check;         | &check;         | &check;         | &check;         | &check;        | &check;        | &check;        | &check;        |                              | &check;                       | &check;                        | &check;                       | &check;                       | &check;                       | &check;                       | &check;                       | &check;                         | &check;                       | &check;                       | &check;                       |                      |                    |                    |                    |                    |                    |                      |                    |                    |                    |                    |
+| macos-13     | &check;         | &check;         | &check;         | &check;         |             | &check;        | &check;        | &check;        |                              | &check;                       | &check;                        | &check;                       | &check;                       | &check;                       | &check;                       | &check;                       | &check;                         | &check;                       | &check;                       | &check;                       |                      |                    |                    |                    |                    |                    |                      |                    |                    |                    |                    |
+| ubuntu-20.04 | &check;         | &check;         |              | &check;         |             | &check;        | &check;        | &check;        | &check;                         | &check;                       | &check;                        | &check;                       |                            | &check;                       | &check;                       | &check;                       | &check;                         | &check;                       | &check;                       | &check;                       | &check;                 | &check;               | &check;               | &check;               | &check;               | &check;               | &check;                 | &check;               | &check;               | &check;               | &check;               |
+| ubuntu-22.04 | &check;         | &check;         | &check;         | &check;         |             |             |             | &check;        | &check;                         | &check;                       | &check;                        | &check;                       |                            | &check;                       | &check;                       | &check;                       | &check;                         | &check;                       | &check;                       | &check;                       | &check;                 | &check;               | &check;               | &check;               | &check;               | &check;               | &check;                 | &check;               | &check;               | &check;               | &check;               |
+| windows-2019 | &check;         | &check;         | &check;         | &check;             |             |             | &check;        | &check;        |                              |                            | &check;                        |                            |                            |                            |                            | &check;                       |                              | &check;                       | &check;                       | &check;                       |                      |                    |                    |                    |                    | &check;               |                      | &check;               | &check;               | &check;               | &check;               |
+| windows-2022 | &check;         | &check;         | &check;         | &check;             |             |             | &check;        | &check;        |                              |                            | &check;                        |                            |                            |                            |                            | &check;                       |                              | &check;                       | &check;                       | &check;                       |                      |                    |                    |                    |                    | &check;               |                      | &check;               | &check;               | &check;               | &check;               |
 <!-- compat ends -->
 
-**Note:** version 13 of the GNU toolchain is not yet available on Windows.
-
-**Note:** on `macos-13`, gcc 7-9 require flag `-L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib`.
-
-Supported Intel toolchains:
-
-| runner    | compiler       | version |
-| :-------- | :------------- | :------ |
-| ubuntu-\* | intel          | 2023.2, 2023.1, 2023.0, <br/> 2022.2.1, 2022.2, 2022.1, 2022.0, <br/> 2021.4, 2021.2, 2021.1.2, 2021.1 |
-| ubuntu-\* | intel-classic  | 2021.10, 2021.9, 2021.8, <br/> 2021.7.1, 2021.7, 2021.6, 2021.5, <br/> 2021.4, 2021.3, 2021.2, 2021.1.2, 2021.1 |
-| macos-\*  | intel-classic  | 2021.10, 2021.9, 2021.8, <br/> 2021.7.1, 2021.7, 2021.6, 2021.5, <br/> 2021.4, 2021.3, 2021.2, 2021.1 |
-| windows-\* | intel | 2023.2, 2023.1, 2023.0, 2022.2.0, 2022.1.0 |
-| windows-\* | intel-classic | 2021.10.0, 2021.9.0, 2021.8.0, 2021.7.0, 2021.6.0 |
+**Note:** on `macos-13`, `gfortran` 7-9 require flag `-L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib`.
 
-**Note:** on macOS `ifx` is not supported, so the `intel` option redirects to `intel-classic` (`ifort`).
+**Note:** Intel's `ifx` compiler is not supported on macOS, so the `intel` option redirects to `intel-classic` (`ifort`).
 
 ## License
 

action.yml

@@ -2,11 +2,11 @@ name: "Setup Fortran"
 description: "Setup Fortran compiler and toolchain"
 inputs:
   compiler:
-    description: "Compiler toolchain"
+    description: "Toolchain or compiler to install"
     required: true
     default: "gcc"
   version:
-    description: "Version of compiler toolchain"
+    description: "Version of toolchain or compiler"
     required: false
 outputs:
   fc:
@@ -15,41 +15,43 @@ outputs:
   cc:
     description: "Path to C compiler"
     value: ${{ steps.outputs.outputs.cc }}
+  cxx:
+    description: "Path to C++ compiler"
+    value: ${{ steps.outputs.outputs.cxx }}
 runs:
   using: "composite"
   steps:
-
+    # On Windows runners the Intel toolchain is very slow to install,
+    # setup caching with daily key rotation. Steps are also needed to
+    # activate the oneAPI environment.
     - name: Set oneAPI install dir
       id: oneapi-root
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')
       shell: bash
       run: echo "ONEAPI_ROOT=C:\Program Files (x86)\Intel\oneAPI" >> "$GITHUB_ENV"
-
     # GNU tar can't handle symlinks on Windows, hide it so default Windows tar is used to restore cache
     - name: Hide GNU tar
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')
       shell: bash
       run: mv "C:\Program Files\Git\usr\bin\tar.exe" "$RUNNER_TEMP\tar.exe"
-
-    - name: Get Date
+    - name: Get date
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')
       id: get-date
       shell: bash
       run: echo "date=$(/bin/date -u "+%Y%m%d")" >> "$GITHUB_OUTPUT"
-
     - name: Restore cache
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')
       id: cache
       uses: actions/cache/restore@v3
       with:
         path: ${{ env.ONEAPI_ROOT }}
         key: ${{ runner.os }}-${{ inputs.compiler }}-${{ inputs.version }}-${{ steps.get-date.outputs.date }}
-
     - name: Restore GNU tar
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')
       shell: bash
       run: mv "$RUNNER_TEMP\tar.exe" 'C:\Program Files\Git\usr\bin\tar.exe'
 
+    # Set up the selected toolchain or compiler
     - name: Setup toolchain
       id: setup
       if: steps.cache.outputs.cache-hit != 'true'
@@ -66,7 +68,7 @@ runs:
 
         case $compiler in
           gcc)
-            version=${VERSION:-11}
+            version=${VERSION:-13}
             install_gcc $platform
             ;;
           intel-classic)
@@ -82,62 +84,66 @@ runs:
             ;;
         esac
 
-        if ! ([ "$RUNNER_OS" == "Windows" ] && [[ "${{ inputs.compiler }}" =~ "intel" ]]); then
-          which "${FC}"
-          which "${CC}"
-          
-          # persist environment variables
+        if ! ([[ "$RUNNER_OS" == "Windows" ]] && [[ "${{ inputs.compiler }}" =~ "intel" ]]); then
+          # save environment variables
           echo "FC=${FC}" >> $GITHUB_ENV
           echo "CC=${CC}" >> $GITHUB_ENV
+          echo "CXX=${CXX}" >> $GITHUB_ENV
         fi
 
+    # save oneAPI cache and activate environment
     - name: Save cache
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel') && steps.cache.outputs.cache-hit != 'true'
       uses: actions/cache/save@v3
       with:
         path: ${{ env.ONEAPI_ROOT }}
         key: ${{ runner.os }}-${{ inputs.compiler }}-${{ inputs.version }}-${{ steps.get-date.outputs.date }}
-
     - name: Activate oneAPI
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')
       shell: cmd
       run: |
+        ver | findstr /i "10\.0\.17" && set VS2019INSTALLDIR=C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise
+        ver | findstr /i "10\.0\.20" && set VS2022INSTALLDIR=C:\Program Files\Microsoft Visual Studio\2022\Enterprise
         for /f "tokens=* usebackq" %%f in (`dir /b "%ONEAPI_ROOT%\compiler\" ^| findstr /V latest ^| sort`) do @set "LATEST=%%f"
         :: this script fails when install location is not the default
         call "%ONEAPI_ROOT%\compiler\%LATEST%\env\vars.bat"
         set | findstr /c:"oneAPI" >> "%GITHUB_ENV%"
-
+    # Intel compilers may have restored from cache so env vars may not be set,
+    # set them then set outputs for all compilers/toolchains
     - name: Set outputs and env vars
       shell: bash
       id: outputs
       run: |
-        if [ "$RUNNER_OS" == "Windows" ]; then
+        if [[ "$RUNNER_OS" == "Windows" ]]; then
           if [[ "${{ inputs.compiler }}" == "intel" ]]; then
             echo fc=ifx>>$GITHUB_OUTPUT
             echo cc=icx>>$GITHUB_OUTPUT
+            echo cxx=icx>>$GITHUB_OUTPUT
             echo FC=ifx>>$GITHUB_ENV
             echo CC=icx>>$GITHUB_ENV
             echo CXX=icx>>$GITHUB_ENV
           elif [[ "${{ inputs.compiler }}" == "intel-classic" ]]; then
             echo fc=ifort>>$GITHUB_OUTPUT
             echo cc=icl>>$GITHUB_OUTPUT
+            echo cxx=icl>>$GITHUB_OUTPUT
             echo FC=ifort>>$GITHUB_ENV
             echo CC=icl>>$GITHUB_ENV
             echo CXX=icl>>$GITHUB_ENV
           else
             echo fc=$FC>>$GITHUB_OUTPUT
             echo cc=$CC>>$GITHUB_OUTPUT
+            echo cxx=$CXX>>$GITHUB_OUTPUT
           fi
         else
           echo fc=$FC>>$GITHUB_OUTPUT
           echo cc=$CC>>$GITHUB_OUTPUT
+          echo cxx=$CXX>>$GITHUB_OUTPUT
         fi
 
         # intel oneapi flag to indicate env has been activated
         if [[ "${{ inputs.compiler }}" =~ "intel" ]]; then
           echo SETVARS_COMPLETED=1>>$GITHUB_ENV
         fi
-
     # GitHub Actions prepends GNU linker to the PATH before all bash steps, hide it so MSVC linker is found
     - name: Hide GNU linker (Windows)
       if: runner.os == 'Windows' && contains(inputs.compiler, 'intel')

compat.csv

@@ -1,8 +1,10 @@
-runner,6,7,8,9,10,11,12,13
-macos-11,✓,✓,✓,✓,✓,✓,✓,✓
-macos-12,✓,✓,✓,✓,✓,✓,✓,✓
-macos-13,,✓,✓,✓,✓,✓,✓,✓
-ubuntu-20.04,,✓,✓,✓,✓,✓,,✓
-ubuntu-22.04,,,,✓,✓,✓,✓,✓
-windows-2019,,,✓,✓,✓,✓,✓,
-windows-2022,,,✓,✓,✓,✓,✓,
+compiler,gcc,gcc,gcc,gcc,gcc,gcc,gcc,gcc,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel-classic,intel,intel,intel,intel,intel,intel,intel,intel,intel,intel,intel
+version,10,11,12,13,6,7,8,9,2021.1.2,2021.1,2021.10,2021.2,2021.3,2021.4,2021.5,2021.6,2021.7.1,2021.7,2021.8,2021.9,2021.1.2,2021.1,2021.2,2021.4,2022.0,2022.1,2022.2.1,2022.2,2023.0,2023.1,2023.2
+runner,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
+macos-11,✓,✓,✓,✓,✓,✓,✓,✓,,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,,,,,,,,,,,
+macos-12,✓,✓,✓,✓,✓,✓,✓,✓,,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,,,,,,,,,,,
+macos-13,✓,✓,✓,✓,,✓,✓,✓,,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,,,,,,,,,,,
+ubuntu-20.04,✓,✓,,✓,,✓,✓,✓,✓,✓,✓,✓,,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓
+ubuntu-22.04,✓,✓,✓,✓,,,,✓,✓,✓,✓,✓,,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓,✓
+windows-2019,✓,✓,✓,✓,,,✓,✓,,,✓,,,,,✓,,✓,✓,✓,,,,,,✓,,✓,✓,✓,✓
+windows-2022,✓,✓,✓,✓,,,✓,✓,,,✓,,,,,✓,,✓,✓,✓,,,,,,✓,,✓,✓,✓,✓

hw.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main() {
+    printf("hello world\n");
+    return 0;
+}

hw.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+    std::cout << "hello world\n";
+    return 0;
+}

setup-fortran.sh

@@ -45,11 +45,12 @@ install_gcc_apt()
 {
   sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/test
   sudo apt-get update
-  sudo apt-get install -y gcc-${version} gfortran-${version}
+  sudo apt-get install -y gcc-${version} gfortran-${version} g++-${version}
   sudo update-alternatives \
     --install /usr/bin/gcc gcc /usr/bin/gcc-${version} 100 \
     --slave /usr/bin/gfortran gfortran /usr/bin/gfortran-${version} \
-    --slave /usr/bin/gcov gcov /usr/bin/gcov-${version}
+    --slave /usr/bin/gcov gcov /usr/bin/gcov-${version} \
+    --slave /usr/bin/g++ g++ /usr/bin/g++-${version}
 
   export FC="gfortran"
   export CC="gcc"
@@ -59,6 +60,15 @@ install_gcc_apt()
 install_gcc_choco()
 {
   case $version in
+    13)
+      choco install mingw --version 13.2.0 --force
+      # mingw 13 on Windows doesn't create shims (http://disq.us/p/2w5c5tj)
+      # so hide Strawberry compilers and manually add mingw bin dir to PATH
+      mv /c/Strawberry/c/bin/gfortran "$RUNNER_TEMP/gfortran"
+      mv /c/Strawberry/c/bin/gcc "$RUNNER_TEMP/gcc"
+      mv /c/Strawberry/c/bin/g++ "$RUNNER_TEMP/g++"
+      echo "C:\ProgramData\mingw64\mingw64\bin" >> $GITHUB_PATH
+      ;;
     12)
       choco install mingw --version 12.2.0 --force
       ;;
@@ -75,7 +85,7 @@ install_gcc_choco()
       choco install mingw --version 8.5.0 --force
       ;;
     *)
-      echo "Unsupported version: $version (choose 8-12)"
+      echo "Unsupported version: $version (choose 8-13)"
       exit 1
       ;;
   esac