View Compilation Error

In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cmath:44:0,
                 from 0_0_32426709_28965.cpp:5:
GCC4.9.2/x86_64-w64-mingw32/include/math.h: In function 'int main()':
GCC4.9.2/x86_64-w64-mingw32/include/math.h:76:8: error: expected unqualified-id before string constant
 extern "C" {
        ^
GCC4.9.2/x86_64-w64-mingw32/include/math.h:1052:18: error: expected '}' before end of line
 #pragma pack(pop)
                  ^
GCC4.9.2/x86_64-w64-mingw32/include/math.h: At global scope:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:1052:18: error: expected declaration before end of line