<p>Another main description in the first line is</p>
<p>CMakeFiles/mlpack_test.dir/sdp_primal_dual_test.cpp.o: In function arma::eGlue<<strong>...</strong>>::elem_type arma::op_dot::apply<<strong>...</strong>>(arma::eGlue<<strong>...</strong>> const&, arma::eGlue<<strong>...</strong>> const&)</p>
<p>I use "..." to omit template argument, we can know the function arma::op_dot::apply reference to arma::is_Mat_fixed_only, arma::op_dot::apply not in the sdp_primal_dual_test.cpp, but op_dot_meat.hpp, and sdp_primal_dual_test.cpp seems to be no place to use arma::op_dot::apply.</p>
<p>The is_Mat_fixed_only is defined in /armadillo_bits/traits.hpp, and op_dot_meat.hpp:215 use the is_Mat::value is reference to is_Mat_fixed_only.</p>
<p>What is the relationship between sdp_primal_dual_test.cpp and arma::op_dot::apply?</p>
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