Stéphane Del Pino
--- a/CMakeLists.txt

+ 11

− 1
+++ b/CMakeLists.txt

+ 11

− 1
 @@ -6,6 +6,9 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 # Forbids in-source builds
 include(CheckNotInSources)

+# Check for some headers
+include(CheckIncludeFileCXX)
+
 # use PkgConfig to find packages
 find_package(PkgConfig REQUIRED)

 @@ -92,7 +95,7 @@ endif()

 # Checks if compiler version is compatible with Pugs sources
 set(GNU_CXX_MIN_VERSION "10.0.0")
-set(CLANG_CXX_MIN_VERSION "11.0.0")
+set(CLANG_CXX_MIN_VERSION "14.0.0")

 #------------------------------------------------------
 # Change Kokkos namespace to avoid conflicts
 @@ -404,6 +407,13 @@ set(CMAKE_CXX_STANDARD "20")
 set(KOKKOS_SOURCE_DIR "${PUGS_SOURCE_DIR}/packages/kokkos")
 set(KOKKOS_BINARY_DIR "${PUGS_BINARY_DIR}/packages/kokkos")

+# test since mdspan is not supported by g++-10 and clang-11 (used in CI)
+check_include_file_cxx("mdspan" CXX_MDSPAN_SUPPORT)
+if (NOT DEFINED ${CXX_MDSPAN_SUPPORT})
+  message(STATUS "Kokkos_ENABLE_IMPL_MDSPAN is deactivated since standard library does not support mdspan")
+  set(Kokkos_ENABLE_IMPL_MDSPAN OFF CACHE BOOL "")
+endif()
+
 # disable Kokkos deprecation warnings by default
 set(Kokkos_ENABLE_DEPRECATION_WARNINGS OFF CACHE BOOL "")