https://svn.boost.org/trac10/ticket/6055 <p> Compiling uBlas' test_complex_norms on SunOS with SunCC: </p> <pre class="wiki">] sunCC -library=stlport4 -I../ ../libs/numeric/ublas/test/test_complex_norms.cpp "../libs/numeric/ublas/test/test_complex_norms.cpp", line 37: Error: The function "sqrt" must have a prototype. "../libs/numeric/ublas/test/test_complex_norms.cpp", line 37: Error: The function "sqrt" must have a prototype. "../libs/numeric/ublas/test/test_complex_norms.cpp", line 65: Error: The function "sqrt" must have a prototype. "../libs/numeric/ublas/test/test_complex_norms.cpp", line 65: Error: The function "sqrt" must have a prototype. 4 Error(s) detected. </pre><p> The standard math header included here - &lt;cmath&gt; - does not inject math functions into the global namespace. The only standard way to use these functions (sqrt included) is via std:: namespace. </p> <p> All the uses of sqrt should be converted to std::sqrt, otherwise compilers with strictly conforming STLs (like SunCC -stlport4) will not be able to compile. </p> <p> std::sqrt works fine with all the compilers I tried (SunCC, g++). </p> <p> (suggested patch attached) </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/6055 Trac 1.4.3 Fedor Sergeev <Fedor.Sergeev@…> Tue, 25 Oct 2011 10:35:11 GMT https://svn.boost.org/trac10/ticket/6055 https://svn.boost.org/trac10/ticket/6055 <ul> <li><strong>attachment</strong> → <span class="trac-field-new">diffs</span> </li> </ul> <p> patch for std::sqrt </p> Ticket Fedor Sergeev <Fedor.Sergeev@…> Tue, 25 Oct 2011 10:38:54 GMT