Does Android support log2

Does android supports log2 ? I already find that android doesnt support long double. When i tried to compile cdce3.c I received following error: ``` g++.dg/cdce3.C: In function 'void mlog2f(int)': g++.dg/cdce3.C:87: error: 'log2f' was not declared in this scope g++.dg/cdce3.C: In function 'void mlog2(int)': g++.dg/cdce3.C:87: error: 'log2' was not declared in this scope g++.dg/cdce3.C: In function 'void olog2f(int)': g++.dg/cdce3.C:108: error: 'log2f' was not declared in this scope g++.dg/cdce3.C: In function 'void olog2(int)': g++.dg/cdce3.C:108: error: 'log2' was not declared in this scope ``` Part of cdce3.c source code: ``` #define DEF_MATH_FUNC(prefix, name) NI void prefix##name##f (int x) \ { \ float yy = name##f ((float) x); \ STORE_RESULT; \ } \ NI void prefix##name (int x) \ { \ double yy = name ((double)x); \ STORE_RESULT; \ } #endif ......... DEF_MATH_FUNC (m,log2) DEF_MATH_FUNC (o,log2) ``` find full source code here.