Different compiler behavior with C++11

The following code

#include <vector>
#include <complex>
#include <algorithm>

template<class K>
inline void conjVec(int m, K* const in) {
    if(!std::is_same<typename std::remove_pointer<K>::type, double>::value)
#ifndef OK
        std::for_each(in, in + m, [](K& z) { z = std::conj(z); });
#else
        std::for_each(reinterpret_cast<std::complex<double>*>(in), reinterpret_cast<std::complex<double>*>(in) + m, [](std::complex<double>& z) { z = std::conj(z); });
#endif
}

int main(int argc, char* argv[]) {
    std::vector<double> nums;
    nums.emplace_back(1.0);
    conjVec(nums.size(), nums.data());
    return 0;
}

compiles fine on Linux with

1. Debian clang version 3.5.0-9


2. gcc version 4.9.1


3. icpc version 15.0.1

and on Mac OS X with

1. gcc version 4.9.2

but not with

1. clang-600.0.56


2. icpc version 15.0.1

except if the macro OK is defined. I don't know which are the faulty compilers, could someone let me know ? Thanks.