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cmake/Modules/c++-standards.cmake

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+#
+# Copyright (C) 2018 by George Cave - gcave@stablecoder.ca
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+# Set the compiler standard to C++11
+macro(cxx_11)
+  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+  set(CMAKE_CXX_EXTENSIONS OFF)
+
+  if(MSVC_VERSION GREATER_EQUAL "1900" AND CMAKE_VERSION LESS 3.10)
+    include(CheckCXXCompilerFlag)
+    check_cxx_compiler_flag("/std:c++11" _cpp_latest_flag_supported)
+    if(_cpp_latest_flag_supported)
+      add_compile_options("/std:c++11")
+    endif()
+  endif()
+endmacro()
+
+# Set the compiler standard to C++14
+macro(cxx_14)
+  set(CMAKE_CXX_STANDARD 14)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+  set(CMAKE_CXX_EXTENSIONS OFF)
+
+  if(MSVC_VERSION GREATER_EQUAL "1900" AND CMAKE_VERSION LESS 3.10)
+    include(CheckCXXCompilerFlag)
+    check_cxx_compiler_flag("/std:c++14" _cpp_latest_flag_supported)
+    if(_cpp_latest_flag_supported)
+      add_compile_options("/std:c++14")
+    endif()
+  endif()
+endmacro()
+
+# Set the compiler standard to C++17
+macro(cxx_17)
+  set(CMAKE_CXX_STANDARD 17)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+  set(CMAKE_CXX_EXTENSIONS OFF)
+
+  if(MSVC_VERSION GREATER_EQUAL "1900" AND CMAKE_VERSION LESS 3.10)
+    include(CheckCXXCompilerFlag)
+    check_cxx_compiler_flag("/std:c++17" _cpp_latest_flag_supported)
+    if(_cpp_latest_flag_supported)
+      add_compile_options("/std:c++17")
+    endif()
+  endif()
+endmacro()
+
+# Set the compiler standard to C++20
+macro(cxx_20)
+  set(CMAKE_CXX_STANDARD 20)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+  set(CMAKE_CXX_EXTENSIONS OFF)
+endmacro()