Mac OS 下g c 編譯工具無法使用

最近在mac os上做c++ 開發，卻遇到乙個讓人難以費解的問題。g++工具無法編譯c++原始碼，提示找不到__debug檔案(這個檔案我也不知道是做什麼用的，有知道的希望各位高手們能指點一下)。其實原始碼很簡單，就是簡單的hell world。

#include

using namespace std;

int main(){

cout << "hello world!" << endl;

return 0;

kevindemacbook-air:namespace kevin$ g++ hello.cpp

in file included from hello.cpp:1:

in file included from /library/developer/commandlinetools/usr/bin/../include/c++/v1/iostream:38:

in file included from /library/developer/commandlinetools/usr/bin/../include/c++/v1/ios:216:

in file included from /library/developer/commandlinetools/usr/bin/../include/c++/v1/__locale:15:

in file included from /library/developer/commandlinetools/usr/bin/../include/c++/v1/string:439:

in file included from /library/developer/commandlinetools/usr/bin/../include/c++/v1/algorithm:628:

in file included from /library/developer/commandlinetools/usr/bin/../include/c++/v1/memory:604:

/library/developer/commandlinetools/usr/bin/../include/c++/v1/iterator:341:10: fatal error: '__debug' file not found

#include <__debug>

^1 error generated.

發現上述問題後，baidu了the question，但是沒有結果。然後在google上找到了乙個湊效的解決方法(但作者沒有說明解決的緣由)

kevindemacbook-air:namespace kevin$

echo '#define _libcpp_assert(x, m) ((void)0)' | sudo tee -a /library/developer/commandlinetools/usr/include/c++/v1/__debug > /dev/null

password:

kevindemacbook-air:namespace kevin$ g++ hello.cpp

kevindemacbook-air:namespace kevin$ ./a.out

hello world!

感覺作者是建立了乙個__debug 檔案並在其中寫入了相應的內容,但是如果是這樣的話，那g++工具在安裝的時候就沒有這個檔案嗎？實在不明白怎麼回事。這裡只把一種解決方法貼出來，希望能幫到跟我一樣的人。如果有人知道這個方法的原理，煩請告知，不勝感激