From 4ee7b30c206f7aec07e9a56625a772ebc3722c6e Mon Sep 17 00:00:00 2001
From: Nicolas Morales <nmmoral@sandia.gov>
Date: Mon, 30 Oct 2023 12:51:41 -0700
Subject: [PATCH] #291: build benchmarks and compiler benchmarks in the CI

---
 .github/workflows/cmake.yml | 12 ++++++------
 comp_bench/CMakeLists.txt   | 15 ++++++++++++++-
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index c3c22b99..1d8da8ef 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -44,27 +44,27 @@ jobs:
 
     - name: Create Build Environment
       run: cmake -E make_directory ${{github.workspace}}/mdspan-build
-      
+
     - name: Check Out
       uses: actions/checkout@v2
       with:
         path: ${{github.workspace}}/mdspan-src
-      
+
     - name: Configure CMake
       shell: bash
       working-directory: ${{github.workspace}}/mdspan-build
-      run: CXX=${{ matrix.compiler_prefix}}/${{ matrix.compiler_driver }} cmake $GITHUB_WORKSPACE/mdspan-src -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/mdspan-install -DMDSPAN_ENABLE_TESTS=ON -DMDSPAN_ENABLE_EXAMPLES=ON -DCMAKE_CXX_FLAGS=${{matrix.cxx_flags_extra}}
-      
+      run: CXX=${{ matrix.compiler_prefix}}/${{ matrix.compiler_driver }} cmake $GITHUB_WORKSPACE/mdspan-src -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/mdspan-install -DMDSPAN_ENABLE_TESTS=ON -DMDSPAN_ENABLE_EXAMPLES=ON -DMDSPAN_ENABLE_BENCHMARKS=ON -DMDSPAN_ENABLE_COMP_BENCH=ON -DCMAKE_CXX_FLAGS=${{matrix.cxx_flags_extra}}
+
     - name: Build
       shell: bash
       working-directory: ${{github.workspace}}/mdspan-build
       run: make -j
-      
+
     - name: Test
       working-directory: ${{github.workspace}}/mdspan-build
       shell: bash
       run: ctest
-            
+
     - name: Install
       shell: bash
       working-directory: ${{github.workspace}}/mdspan-build
diff --git a/comp_bench/CMakeLists.txt b/comp_bench/CMakeLists.txt
index 667b94f6..cfd27195 100644
--- a/comp_bench/CMakeLists.txt
+++ b/comp_bench/CMakeLists.txt
@@ -1,10 +1,23 @@
 
 include(metabench)
 
+# C++ standards that our benchmark will actually support
+set(_cbench_supported_standards 17 20 23)
+
+# Obtain the subset that are actually supported by the compiler
+set(_cbench_standards "")
+foreach(_std IN LISTS _cbench_supported_standards)
+  if ("cxx_std_${_std}" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
+    list(APPEND _cbench_standards "${_std}")
+  endif()
+endforeach()
+
+message(STATUS "Using the following C++ standards for compiler benchmarking: ${_cbench_standards}")
+
 function(add_cxx_comparison name template range)
 
     set(all_datasets)
-    foreach(std IN ITEMS 11 14 17)
+    foreach(std IN LISTS _cbench_standards)
       metabench_add_dataset(
           ${name}_${std}
           ${template}