From 1b30da66e7f7c9fe7b66905c9d6a9fb1e82fe574 Mon Sep 17 00:00:00 2001
From: Axel Huebl <axel.huebl@plasma.ninja>
Date: Fri, 29 May 2020 15:38:43 -0700
Subject: [PATCH] C++20 Compatibility: GCC 10.1 (#949)

---
 .../workflows/dependencies/dependencies.sh    |  8 ++------
 .../dependencies/dependencies_gcc10.sh        | 17 ++++++++++++++++
 .../dependencies/dependencies_mac.sh          |  8 ++------
 .github/workflows/linux.yml                   | 20 +++++++++++++++++++
 4 files changed, 41 insertions(+), 12 deletions(-)
 create mode 100755 .github/workflows/dependencies/dependencies_gcc10.sh

diff --git a/.github/workflows/dependencies/dependencies.sh b/.github/workflows/dependencies/dependencies.sh
index 8c5312d5eb2..d0e86e99c0a 100755
--- a/.github/workflows/dependencies/dependencies.sh
+++ b/.github/workflows/dependencies/dependencies.sh
@@ -1,13 +1,9 @@
 #!/usr/bin/env bash
 #
-# Copyright 2020 Axel Huebl
+# Copyright 2020 The AMReX Community
 #
 # License: BSD-3-Clause-LBNL
-
-# search recursive inside a folder if a file contains tabs
-#
-# @result 0 if no files are found, else 1
-#
+# Authors: Axel Huebl
 
 set -eu -o pipefail
 
diff --git a/.github/workflows/dependencies/dependencies_gcc10.sh b/.github/workflows/dependencies/dependencies_gcc10.sh
new file mode 100755
index 00000000000..583c50182a9
--- /dev/null
+++ b/.github/workflows/dependencies/dependencies_gcc10.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Copyright 2020 The AMReX Community
+#
+# License: BSD-3-Clause-LBNL
+# Authors: Axel Huebl
+
+set -eu -o pipefail
+
+sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+sudo apt-get update
+
+sudo apt-get install -y --no-install-recommends \
+    build-essential    \
+    g++-10 gfortran-10 \
+    libopenmpi-dev     \
+    openmpi-bin
diff --git a/.github/workflows/dependencies/dependencies_mac.sh b/.github/workflows/dependencies/dependencies_mac.sh
index 245194504ce..7fa6878dbb9 100755
--- a/.github/workflows/dependencies/dependencies_mac.sh
+++ b/.github/workflows/dependencies/dependencies_mac.sh
@@ -1,13 +1,9 @@
 #!/usr/bin/env bash
 #
-# Copyright 2020 Axel Huebl
+# Copyright 2020 The AMReX Community
 #
 # License: BSD-3-Clause-LBNL
-
-# search recursive inside a folder if a file contains tabs
-#
-# @result 0 if no files are found, else 1
-#
+# Authors: Axel Huebl
 
 set -eu -o pipefail
 
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index cf33b1071d5..26ca812a498 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -36,6 +36,26 @@ jobs:
         cmake .. -DENABLE_TUTORIALS=ON
         make -j 2 tutorials
 
+  # Build libamrex and all tutorials
+  tutorials_cxx20:
+    name: GNU@10.1 C++20 [tutorials]
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Dependencies
+      run: .github/workflows/dependencies/dependencies_gcc10.sh
+    - name: Build & Install
+      run: |
+        mkdir build
+        cd build
+        cmake ..                     \
+            -DENABLE_TUTORIALS=ON    \
+            -DCMAKE_CXX_STANDARD=20  \
+            -DCMAKE_C_COMPILER=$(which gcc-10)              \
+            -DCMAKE_CXX_COMPILER=$(which g++-10)            \
+            -DCMAKE_Fortran_COMPILER=$(which gfortran-10)
+        make -j 2 tutorials
+
   # Build libamrex and all tutorials w/o MPI
   tutorials-nonmpi:
     name: GNU@7.5 C++14 non-MPI [tutorials]