Qt Creator:体系结构x86_64的未定义符号 [英] Qt Creator: Undefined symbols for architecture x86_64

问题描述

我在Qt Creator中有一个程序，可以在Windows机器上编译并正常运行.但是，当我尝试在Mac OS X(10.9)中进行编译时，我收到了以下消息:

I have a program in Qt creator that compiles and runs fine in a Windows machine. But as soon as I tried to compile it in a Mac OS X (10.9) I received these messages:

Undefined symbols for architecture x86_64:
  "std::__1::__basic_string_common<true>::__throw_length_error() const", referenced from:
      std::__1::enable_if<__is_forward_iterator<char*>::value, void>::type std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init<char*>(char*, char*) in libVolumeSelectorLib.a(NetCDFDataSource.o)
...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [UI.app/Contents/MacOS/UI] Error 1
14:38:02: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project VVSIT (kit: Desktop Qt 5.4.0 clang 64bit)
When executing step "Make"

我曾尝试清理并再次编译，以防Windows上构建的某些文件进入Mac，但事实并非如此，问题仍然存在.

I have tried cleaning and compiling again in case some file built on Windows had made it to the Mac, but that is not the case, the problem continues happening.

我检查了这些帖子，但它们的解决方案不起作用:

I've checked these posts but their solutions didn't work:

• QT-creator中架构x86_64的未定义符号
• https://stackoverflow.com/questions/23806544 /undefined-symbols-for-architecture-x86-64-in-qt-creator

• Undefined symbols for architecture x86_64 in QT-creator
• https://stackoverflow.com/questions/23806544/undefined-symbols-for-architecture-x86-64-in-qt-creator

有什么办法解决这个错误吗?

Any idea how to solve this error?

推荐答案

经过研究，我发现此线程:

After some research I found this thread: Qt5.1/Qt5.2 + XCode 5.0.2 + Mac OS 10.9 (Mavericks), Can’t link to the libraries

该链接包含对我有用的解决方案，我必须编辑该文件:

That link contains the solution that worked for me, I had to edit the file:

/Applications/Qt/5.4/clang_64/mkspecs/macx-clang/qmake.conf

并更改显示以下内容的行:

And change the line that says:

QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.7

收件人:

QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.9

之后，我清理了项目中的每个子项目，然后再次编译它们，现在一切正常.

After that, I cleaned every subproject in my project, and compiled them again, and all is working fine now.

如果您想知道clang++所做的更改是什么，那就是将参数-mmacosx-version-min=10.7更改为-mmacosx-version-min=10.9.

In case you wonder what does that change in the clang++ do, what it does is to change the parameter -mmacosx-version-min=10.7 to -mmacosx-version-min=10.9.

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