setting global standard

Author: JohanMabille

CMakeLists.txt

@@ -13,6 +13,12 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_VERBOSE_MAKEFILE ON)
 project(xtensor-blas)
 
+if(NOT CMAKE_CXX_STANDARD)
+    set(CMAKE_CXX_STANDARD 20)
+endif()
+message(STATUS "🔧 C++ standard: ${CMAKE_CXX_STANDARD}")
+
+
 set(INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/include)
 set(XTENSOR_BLAS_INCLUDE_DIR ${INCLUDE_DIR})