在Windows上为Matlab构建libspline - 对重载函数'pow'的模糊调用

时间:2013-07-13 20:30:41

标签: c++ visual-studio matlab overload-resolution

我正在尝试在Windows上为Matlab构建libspline,可在此处获取:

http://ttic.uchicago.edu/~smaji/projects/libspline-release1.0.tar.gz

我收到以下错误:

>> make
additiveModel.cpp 
additiveModel.cpp(156) : error C2668: 'pow' : ambiguous call to overloaded function 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\math.h(583): could be 'long double pow(long double,int)' 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\math.h(535): or       'float pow(float,int)' 
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\math.h(497): or       'double pow(double,int)' 
        while trying to match the argument list '(int, int)' 

  C:\USR\ML\MATLAB~1\BIN\MEX.PL: Error: Compile of 'additiveModel.cpp' failed. 

??? Error using ==> mex at 208
Unable to complete successfully.

Error in ==> make at 4
mex -O -largeArrayDims -c additiveModel.cpp

如何解决?

1 个答案:

答案 0 :(得分:2)

additiveModel.cpp中的第156行是:

dimwts[2*i] = 1.0/pow(i+1,reg);

在这里,您可以看到传递给pow的两个参数都是int。由于powmath.h的重载不会超过两个int,因此在这种情况下,最佳可行功能不是唯一的,因此重载决策失败

您可以通过将第一个参数转换为合适的类型来解决此问题,例如double

dimwts[2*i] = 1.0/pow(static_cast<double>(i+1),reg);