id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6055	unqualified sqrt() fails to compile on SunCC/SunOS	Fedor Sergeev <Fedor.Sergeev@…>	Gunter	"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)"	Bugs	new	To Be Determined	uBLAS	Boost 1.47.0	Problem		SunCC