缺少 C++ 头文件 <__debug>更新 OSX 命令行工具 6.3 后 [英] Missing C++ header <__debug> after updating OSX Command Line Tools 6.3

问题描述

从 App Store 更新到命令行工具 6.3 后，包括 或 在内的程序将导致文件未发现错误如下.cpp 没有什么有趣的，但包含在包含的标题之一中.

After updating to Command Line Tools 6.3 from the App Store, programs including <vector> or <iterator> which internally include <__debug> will cause file not found error as follows. The cpp is nothing interesting but includes in one of the included headers.

c++ -O3 -I/Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers -L/Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/build/binaries/clusterStaticLibrary /Users/farleylai/Documents/dev/git/ESMS/Optimizer/build/StreamIt/FIR/511/512/combined_threads.cpp -o streamit -lcluster -lpthread -lstdc++
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/build/StreamIt/FIR/511/512/combined_threads.cpp:9:
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers/node_server.h:22:
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers/thread_info.h:20:
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers/connection_info.h:19:
/Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers/socket_holder.h:43:25: warning: delete called on 'mysocket' that is abstract but has non-virtual destructor
      [-Wdelete-non-virtual-dtor]
    if (!is_mem_socket) delete sock;
                        ^
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/build/StreamIt/FIR/511/512/combined_threads.cpp:9:
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers/node_server.h:22:
In file included from /Users/farleylai/Documents/dev/git/ESMS/Optimizer/../StreamIt/src/cluster/headers/thread_info.h:26:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/vector:265:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/__bit_reference:15:
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/algorithm:641:10: fatal error: '__debug' file not found
#include <__debug>
         ^

有什么办法可以解决这个问题吗?我不希望指定任何额外的 C++ 标志.

Any ideas to fix this? I don't expect to specify any additional C++ flags.

谢谢.

PS:OSX 10.10.3 上的 MacBook pro

PS: MacBook pro on OSX 10.10.3

更新:

该问题已由 Apple 在其开发者论坛上验证.在命令行工具 6.2 中，__debug 的包含有条件地保护如下，但在 6.3 中没有.

The issue is verified by Apple on their developer's forum. In Command Line Tools 6.2, the inclusion of __debug is conditionally guarded as follows but not in 6.3.

#ifdef _LIBCPP_DEBUG
#   include <__debug>
#else
#   define _LIBCPP_ASSERT(x, m) ((void)0)
#endif

和 libcxx 人讨论了移除 __debug 的守卫 这里.感觉 __debug 在 OSX 上从来不存在.

And libcxx people talked about removing the guards of __debug here. It feels like __debug never exists on OSX.

推荐答案

通过 Apple 的开发者下载页面.

Downgrade the Command Line Tools to 6.2 via Apple's Developer Download Page.

请注意为您的 OS X 下载正确的版本:

Be careful to download the correct version for your OS X:

• OS X 10.10 commandlinetoolsosx10.10forxcode6.2.dmg
• OS X 10.9 commandlinetoolsosx10.9forxcode6.2.dmg

这是可行的，因为 __debug 的包含在命令行工具 6.2 中有条件地受到保护，如下所示，但在 6.3 中则不然.

This works because the inclusion of __debug is conditionally guarded as follows in Command Line Tools 6.2 but not in 6.3.

#ifdef _LIBCPP_DEBUG
#   include <__debug>
#else
#   define _LIBCPP_ASSERT(x, m) ((void)0)
#endif

我认为这是最安全的方法，因为:

In my opinion this is the safest way, because:

1. 您不会损害您的工具链
2. Apple 修复问题后，您可以通过 App Store 轻松升级
3. 如果您手动添加文件，则必须稍后将其删除，否则可能会出现更多问题

更新 - 21.04.2015

问题已修复，由 Apple 解决.安装命令行工具 6.3.1 后，一切正常！

Problem fixed by Apple. After installing Command Line Tools 6.3.1 everything works as expected!

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