Hello everyone, I'm new to using boost and I'm trying to use its quadrature routines, specifically the *tanh_sinh* integrator. I'm trying to run the examples here: <goog_14736225> https://www.boost.org/doc/libs/1_66_0/libs/math/doc/html/math_toolkit/double... I've been successful using it with the *double* datatype. However, I can't seem to work with the *Real* datatype. When I run the following, I'm successful. tanh_sinh<double> integrator;auto f = [](double x) { return 5*x + 7; };double Q = integrator.integrate(f);Q = integrator.integrate(f, 0.0, 1.1); But when I run the following: auto f = [](Real x) { return log(x)*log(1-x); };Real Q = integrator.integrate(f, (Real) 0, (Real) 1); I get the error: boost_test.cxx: In function ‘int main(int, char**)’: boost_test.cxx:47:15: error: ‘Real’ has not been declared auto f2 = [](Real x) { return log(x)*log(1-x); }; ^~~~ boost_test.cxx:48:2: error: ‘Real’ was not declared in this scope Real Q2 = integrator.integrate(f2, (Real) 0, (Real) 1); I think I need to include the right headers for this to go away. However, I'm not sure what the correct header file is. Thank you for your attention. -- Anirban Pal