Re: ambiguous call to "pow(int, unsigned int&)" in __magick_read__.cc:763

[Ben Abbott]

On Aug 27, 2011, at 5:38 AM, Carlo de Falco wrote:

> Building the current tip on OSX 10.6 fails in DLD-FUNCTIONS/__magick_read__.cc
> with the following error:
> 
> DLD-FUNCTIONS/__magick_read__.cc: In function 'void 
> encode_uint_image(std::vector<Magick::Image, std::allocator<Magick::Image> 
> >&, const octave_value&, bool)':
> DLD-FUNCTIONS/__magick_read__.cc:763: error: call of overloaded 'pow(int, 
> unsigned int&)' is ambiguous
> /usr/include/architecture/i386/math.h:343: note: candidates are: double 
> pow(double, double)
> /usr/include/c++/4.2.1/cmath:373: note:                 long double 
> std::pow(long double, int)
> /usr/include/c++/4.2.1/cmath:369: note:                 float std::pow(float, 
> int)
> /usr/include/c++/4.2.1/cmath:365: note:                 double 
> std::pow(double, int)
> /usr/include/c++/4.2.1/cmath:361: note:                 long double 
> std::pow(long double, long double)
> /usr/include/c++/4.2.1/cmath:357: note:                 float std::pow(float, 
> float)
> 
> I can fix the error by changing line 763 to
> 
> im.quantizeColors (static_cast<int> (pow (2, static_cast<double> 
> (bitdepth))));
> 
> but it doesn't look very clean to me, what is this the correct fix?
> 
> c.

I'm running MacOS 10.7, and building with gcc-4.4, and GraphicsMagick 1.3.12.

I don't see this error.

With your suggested change, the sources also build without error.

I'm not competent in c/c++, but I don't see anything about your suggested 
syntax that looks out of place.

Ben