如何在 macOS catalina 上解決此錯誤？

Question

我正在嘗試使用 g++ 編譯器編譯 Cpp 程序，但出現此錯誤：

Yuliam-MBP:Documents yuliamosh$ g++-9 -std=c++17 -Wall -Wextra -pedantic vector.cpp -o vector
In file included from /usr/local/Cellar/gcc/9.2.0_3/include/c++/9.2.0/bits/postypes.h:40,
                 from /usr/local/Cellar/gcc/9.2.0_3/include/c++/9.2.0/iosfwd:40,
                 from /usr/local/Cellar/gcc/9.2.0_3/include/c++/9.2.0/ios:38,
                 from /usr/local/Cellar/gcc/9.2.0_3/include/c++/9.2.0/ostream:3,
                 from /usr/local/Cellar/gcc/9.2.0_3/include/c++/9.2.0/iostream:39,
                 from vector.cpp:1:
/usr/local/Cellar/gcc/9.2.0_3/include/c++/9.2.0/cwchar:44:10: fatal error: wchar.h: No such file or directory
   44 | #include <wchar.h>
      |          ^~~~~~~~~
compilation terminated.

Answer 1

安裝
xcode-select --install

然后切換到新安裝的工具
sudo xcode-select --switch /Library/Developer/CommandLineTools/

您可能需要重置編譯工具的默認位置：

xcode-select --reset

這些是通常的修復。 可悲的是，他們都沒有為我工作！

這對我有用： 自制解決方案

Answer 2

似乎沒有找到“wchar.h”。

我建議按照此線程中的說明進行操作。