Update CXX compiler from 14 to 17

Similar to pytorch#678

Author: malfet

cpp/autograd/CMakeLists.txt

@@ -1,7 +1,7 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(autograd)
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 
 find_package(Torch REQUIRED)
 

cpp/dcgan/CMakeLists.txt

@@ -17,7 +17,7 @@ endif()
 
 add_executable(dcgan dcgan.cpp)
 target_link_libraries(dcgan "${TORCH_LIBRARIES}")
-set_property(TARGET dcgan PROPERTY CXX_STANDARD 14)
+set_property(TARGET dcgan PROPERTY CXX_STANDARD 17)
 
 if (MSVC)
   file(GLOB TORCH_DLLS "${TORCH_INSTALL_PREFIX}/lib/*.dll")

cpp/mnist/CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 project(mnist)
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 
 find_package(Torch REQUIRED)
 

cpp/regression/CMakeLists.txt

@@ -1,7 +1,7 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(regression)
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 
 find_package(Torch REQUIRED)
 

cpp/transfer-learning/CMakeLists.txt

@@ -14,5 +14,5 @@ target_link_libraries(example "${TORCH_LIBRARIES}")
 target_link_libraries(classify ${OpenCV_LIBS})
 target_link_libraries(classify "${TORCH_LIBRARIES}")
 
-set_property(TARGET classify PROPERTY CXX_STANDARD 14)
-set_property(TARGET example PROPERTY CXX_STANDARD 14)
+set_property(TARGET classify PROPERTY CXX_STANDARD 17)
+set_property(TARGET example PROPERTY CXX_STANDARD 17)

fx/native_interpreter/CMakeLists.txt

@@ -5,6 +5,6 @@ find_package(Torch REQUIRED)
 
 # Define our library target
 add_library(interpreter SHARED interpreter.cpp)
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 # Link against LibTorch
 target_link_libraries(interpreter "${TORCH_LIBRARIES}")