error: 'log1p' is not a member of 'std'

Question

I create a simple main function and above it, I include armadillo library.

#include <armadillo>

I compiled it using g++ (version of GCC is 5.3) and under cygwin 64bit on windowse 8. I turned on c++11 option and added -larmadillo for linking to armadillo library.

Once I compile the code, I receive such horrible error. The same code runs absolutely fine on windowse XP 32 bit.

usr/include/armadillo_bits/compiler_setup.hpp:73:88: note: #pragma message: WAR

NING: #define ARMA_DONT_USE_CXX11 before #include <armadillo>

     #pragma message ("WARNING: #define ARMA_DONT_USE_CXX11 before #include <arm

adillo>")



        ^

In file included from /usr/include/armadillo:310:0,

                 from main.cpp:1:

/usr/include/armadillo_bits/arma_cmath.hpp: In function 'float arma::arma_log1p(

float)':

/usr/include/armadillo_bits/arma_cmath.hpp:270:12: error: 'log1p' is not a membe

r of 'std'

     return std::log1p(x);

            ^

compilation terminated due to -Wfatal-errors.

Makefile:110: recipe for target 'main.o' failed

make: *** [main.o] Error 1