View Compilation Error

0_0_13600641_30914.cpp: In function 'double fabs(double)':
0_0_13600641_30914.cpp:17:8: error: redefinition of 'double fabs(double)'
 double fabs(double x)
        ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cmath:44:0,
                 from 0_0_13600641_30914.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:181:31: note: 'double fabs(double)' previously defined here
   __CRT_INLINE double __cdecl fabs (double x)
                               ^