/opt/petalinux/2021.1/sysroots/cortexa72-cortexa53-xilinx-linux/usr/include/xir/util/any.hpp:28:2: error: #error "must enable c++17"28 | #error "must enable c++17"| ^~~~~

定位到目標文件

/** Copyright 2019 Xilinx Inc.** 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.*/#pragma once #if __has_include(<any>) && __cplusplus > 201700 #include <any> #if !__cpp_lib_any > 0 #error "must enable -std=c++17 to use std::any" #endif namespace xir { using any = std::any; namespace stdx = ::std; } // namespace xir #else #error "must enable c++17" #endif

解決方法：
原因是寫的CMakeLists.txt文件沒有添加對C++17的支持，所以在工程目錄下的CMakeLists.txt中添加以下語句：

SET( CMAKE_CXX_FLAGS "-std=c++17 -O3")

其中，參數CMAKE_CXX_FLAGS含義是： set compiler for c++ language
而后面的-O3（是字母opq的o，大寫的歐）是用來調節編譯時的優化程度的，最高為-O3,最低為-O0（即不做優化）

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