Qt 4.8，Visual Studio 2013 编译错误答案

【问题标题】：Qt 4.8, Visual Studio 2013 compiling errorQt 4.8，Visual Studio 2013 编译错误
【发布时间】：2013-08-06 12:47:39
【问题描述】：

我按照 tutorial 使用 Visual Studio 2013 编译 Qt 4.8，但运行 nmake 后我得到：

C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSCallbackConstructor.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSCallbackFunction.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSCallbackObject.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSClassRef.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSContextRef.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSObjectRef.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
JSStringRef.cpp
JSValueRef.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
OpaqueJSString.cpp
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(103) : error C2491: 'round' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(110) : error C2491: 'roundf' : definition of dllimport function not allowed
C:\Qt\4.8.5.src\src\3rdparty\javascriptcore\JavaScriptCore\wtf/MathExtras.h(128) : error C2084: function 'bool signbit(double)' already has a body
        C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\math.h(324) : see previous definition of 'signbit'
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(615) : error C2264: 'signbit' : error in function definition or declaration; function not called
c:\qt\4.8.5.src\src\3rdparty\javascriptcore\javascriptcore\runtime\JSValue.h(696) : error C2264: 'signbit' : error in function definition or declaration; function not called
Generating Code...
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\BIN\cl.EXE"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\BIN\nmake.exe"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'cd' : return code '0x2'

感谢您的帮助

【问题讨论】：

标签： qt visual-studio-2012 compiler-construction qt4 visual-studio-2013

【解决方案1】：

要修复 'round' 和 'roundf' 错误，请替换（第 103 和 110 行）：

static double round(double num)
static float roundf(float num)

与：

static inline double round(double num)
static inline float roundf(float num)

要修复“signbit”错误，请使用以下宏（第 128 行）将其括起来：

#if _MSC_VER < 1800
inline bool signbit(double num) { return _copysign(1.0, num) < 0; }
#endif

【讨论】：

更好的是，使用官方patch。
我测试了 JPaget 和 Zdenik 的两个补丁，但它们在 Qt 4.8.6 中不起作用。这是唯一有效的答案。
基于 VS2013 中的扩展 C99 库 - 参见文章 C99 library support in Visual Studio 2013 将旧实现附上代码：#if _MSC_VER < 1800 ... #endif

【解决方案2】：

使用官方的patch 来获得 VS 2013 的兼容性。

【讨论】：

完整补丁是here

【解决方案3】：

您在编译之前是否运行过“vcvars32.bat”？ VC++的环境变量好像没有设置好。

有关 VC++ 环境的信息，请参阅http://msdn.microsoft.com/en-us/library/f2ccy3wt.aspx。

再见

【讨论】：

【解决方案4】：

您的问题是您使用的不是 Visual Studio 2012，而是 2013。VS 2012 是 VS11，而 VS 2013 是 VS12，您的路径“C:\Program Files (x86)\Microsoft Visual Studio 12.0”属于 VS 2013。

然而，核心问题是 VS 2013 兼容 C99，这会导致 V8 引擎和 javascriptcore 出现问题。

目前没有解决办法，只能手动打补丁。

【讨论】：

【解决方案5】：

上面提出的两个补丁还不够。就我而言，在将它们应用到 Qt 4.8.5 之后，我遇到了另一个错误：

HashSet.h(180) : error C2664: 'std::pair<WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *,WTF::IdentityExtractor<void *>,WTF::PtrHash<JSC::EncodedJSValue>,WTF::HashTraits<JS
C::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>>,void *>,bool>::pair(const std::pair<WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *,WTF::IdentityExtractor<void *>,WTF::P
trHash<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>>,void *>,bool> &)' : cannot convert argument 1 from 'std::pair<WTF::HashTableIterator<Key,Va
lue,Extractor,HashFunctions,Traits,KeyTraits>,bool>' to 'const std::pair<WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *,WTF::IdentityExtractor<void *>,WTF::PtrHash<JSC::EncodedJ
SValue>,WTF::HashTraits<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>>,void *>,bool> &'                                                                                               
        with                                                                                                                                                                                      
        [                                                                                                                                                                                         
            Key=void *                                                                                                                                                                            
,            Value=void *                                                                                                                                                                         
,            Extractor=WTF::IdentityExtractor<void *>                                                                                                                                             
,            HashFunctions=WTF::PtrHash<JSC::EncodedJSValue>                                                                                                                                      
,            Traits=WTF::HashTraits<JSC::EncodedJSValue>                                                                                                                                          
,            KeyTraits=WTF::HashTraits<JSC::EncodedJSValue>                                                                                                                                       
        ]                                                                                                                                                                                         
        Reason: cannot convert from 'std::pair<WTF::HashTableIterator<Key,Value,Extractor,HashFunctions,Traits,KeyTraits>,bool>' to 'const std::pair<WTF::HashTableConstIteratorAdapter<WTF::HashT
able<void *,void *,WTF::IdentityExtractor<void *>,WTF::PtrHash<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>>,void *>,bool>'                     
        with                                                                                                                                                                                      
        [                                                                                                                                                                                         
            Key=void *                                                                                                                                                                            
,            Value=void *                                                                                                                                                                         
,            Extractor=WTF::IdentityExtractor<void *>                                                                                                                                             
,            HashFunctions=WTF::PtrHash<JSC::EncodedJSValue>                                                                                                                                      
,            Traits=WTF::HashTraits<JSC::EncodedJSValue>                                                                                                                                          
,            KeyTraits=WTF::HashTraits<JSC::EncodedJSValue>                                                                                                                                       
        ]                                                                                                                                                                                         
        No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called                                                                          
        .\wtf/HashSet.h(179) : while compiling class template member function 'std::pair<WTF::HashTableConstIteratorAdapter<WTF::HashTable<void *,void *,WTF::IdentityExtractor<void *>,WTF::PtrHa
sh<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>,WTF::HashTraits<JSC::EncodedJSValue>>,void *>,bool> WTF::HashSet<void *,WTF::PtrHash<JSC::EncodedJSValue>,WTF::HashTraits<JSC::Encode
dJSValue>>::add(void *const &)'

解决方案是从 Git Qt4 存储库中获取 3 个文件：

/src/3rdparty/webkit/Source/JavaScriptCore/wtf/HashSet.h https://qt.gitorious.org/qt/mi-clone/raw/b45cc6bba9f85497eedf10cb5969d24273cb11db:src/3rdparty/webkit/Source/JavaScriptCore/wtf/HashSet.h

/src/3rdparty/webkit/Source/JavaScriptCore/wtf/MathExtras.h https://qt.gitorious.org/qt/mi-clone/raw/b45cc6bba9f85497eedf10cb5969d24273cb11db:src/3rdparty/webkit/Source/JavaScriptCore/wtf/MathExtras.h

/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h https://qt.gitorious.org/qt/mi-clone/raw/b45cc6bba9f85497eedf10cb5969d24273cb11db:src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h

【讨论】：

为清楚起见，我重新链接有问题的 cmets 建议的补丁：qt.gitorious.org/qt/qtscript/commit/… 和 qt.gitorious.org/qt/qtdeclarative/commit/…
由于带有补丁的 gitorious 站点离线几天（正在迁移东西），有人可以将 /src/3rdparty/**webkit**/Source/JavaScriptCore/wtf/HashSet 的补丁文件发送给我.h，因为这个错误在 qt 4.8.6 中仍然没有修复（尽管 /src/3rdparty/**javascriptcore**/JavaScriptCore/wtf/HashSet.h 编译）。谢谢，赫尔曼

【解决方案6】：

@AppDealer 的 awnser 可以工作，如果您必须将其应用于 MathExtras.h 文件的两个实例。（一个在JavaScriptCore 另一个在Webkit 之后你会遇到HashSet 构建问题。

No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called .\wtf/HashSet.h

这两个问题都可以在this issue 上找到patch。

【讨论】：