unqualified sqrt() fails to compile on SunCC/SunOS

[Fedor Sergeev <Fedor.Sergeev@…>]

Compiling uBlas' test_complex_norms on SunOS with SunCC:

]  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.

The standard math header included here - <cmath> - does not inject math functions into the global namespace. The only standard way to use these functions (sqrt included) is via std:: namespace.

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.

std::sqrt works fine with all the compilers I tried (SunCC, g++).

(suggested patch attached)

[Fedor Sergeev <Fedor.Sergeev@…>]

patch for std::sqrt

[Fedor Sergeev <Fedor.Sergeev@…>]

compilers with strictly conforming STLs (like SunCC)

Sorry for slightly misleading cut-n-paste from a different ticket. No STL usage here.

Meant "compilers with strictly conforming standard headers (like SunCC)".