[I tried to post already yesterday, but my message somehow didn't get 
through]

When trying to build sage (the current develop-branch 7.5) I get an error 
on my debian box with a current sid-install. 

For the end of the logfile, see the end of this post. It also throws some 
of the following errors:

polymake_conversion.cc:176:56: error: cannot convert 
'pm::array_traits<pm::Integer>::iterator {aka pm::ptr_wrapper<pm::Integer, 
false>}' to 'const pm::Integer*' in initialization

I will gladly attach the entire log file, if that helps. 

part of logs/pkgs/singular-4.1.0p1.log:

../../../gfanlib/gfanlib_matrix.h: In instantiation of 
'gfan::Matrix<typ>::RowRef& gfan::Matrix<typ>::RowRef::operator=(const 
gfan::Vector<typ>&) [with typ = gfan::Rational]':
../../../gfanlib/gfanlib_matrix.h:777:57:   required from here
../../../gfanlib/gfanlib_matrix.h:221:24: warning: comparison between 
signed and unsigned integer expressions [-Wsign-compare]
         assert(v.size()==matrix.width);
                        ^
../../../gfanlib/gfanlib_matrix.h: In instantiation of 
'gfan::Matrix<typ>::RowRef& gfan::Matrix<typ>::RowRef::operator=(const 
gfan::Vector<typ>&) [with typ = gfan::Integer]':
../../../gfanlib/gfanlib_matrix.h:784:66:   required from here
../../../gfanlib/gfanlib_matrix.h:221:24: warning: comparison between 
signed and unsigned integer expressions [-Wsign-compare]
../../../gfanlib/gfanlib_matrix.h: In instantiation of 
'gfan::Matrix<typ>::RowRef& gfan::Matrix<typ>::RowRef::operator=(const 
gfan::Vector<typ>&) [with typ = int]':
../../../gfanlib/gfanlib_matrix.h:792:59:   required from here
../../../gfanlib/gfanlib_matrix.h:221:24: warning: comparison between 
signed and unsigned integer expressions [-Wsign-compare]
Makefile:573: recipe for target 'polymake_la-polymake_conversion.lo' failed
make[8]: *** [polymake_la-polymake_conversion.lo] Error 1



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