Enable C++17 for cmake modules (#13869)

Moved the lines which add c++17 to CXX_FLAGS before the include of
modules. After this c++17 features should be also supported in source
code of the modules.

CMakeLists.txt

@@ -478,6 +478,17 @@ endif(USE_KALLOC_ALIGNMENT)
 # need to be re-compiled every time. Using ccache 4.0+ can resolve this issue.
 include(cmake/utils/CCache.cmake)
 
+include(CheckCXXCompilerFlag)
+if(NOT MSVC)
+  check_cxx_compiler_flag("-std=c++17" SUPPORT_CXX17)
+  set(CMAKE_CXX_FLAGS "-std=c++17 ${CMAKE_CXX_FLAGS}")
+  set(CMAKE_CUDA_STANDARD 17)
+else()
+  check_cxx_compiler_flag("/std:c++17" SUPPORT_CXX17)
+  set(CMAKE_CXX_FLAGS "/std:c++17 ${CMAKE_CXX_FLAGS}")
+  set(CMAKE_CUDA_STANDARD 17)
+endif()
+
 # Module rules
 include(cmake/modules/VTA.cmake)
 include(cmake/modules/StandaloneCrt.cmake)
@@ -525,17 +536,6 @@ include(cmake/modules/Git.cmake)
 include(cmake/modules/LibInfo.cmake)
 include(cmake/modules/RustExt.cmake)
 
-include(CheckCXXCompilerFlag)
-if(NOT MSVC)
-  check_cxx_compiler_flag("-std=c++17" SUPPORT_CXX17)
-  set(CMAKE_CXX_FLAGS "-std=c++17 ${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CUDA_STANDARD 17)
-else()
-  check_cxx_compiler_flag("/std:c++17" SUPPORT_CXX17)
-  set(CMAKE_CXX_FLAGS "/std:c++17 ${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CUDA_STANDARD 17)
-endif()
-
 set(LIBINFO_FILE ${CMAKE_CURRENT_LIST_DIR}/src/support/libinfo.cc)
 add_lib_info(${LIBINFO_FILE})
 list(REMOVE_ITEM COMPILER_SRCS ${LIBINFO_FILE})