OpenMP GPU offloading math library?

I am trying to offload code the GPU using OpenMP 4+ directives. I am using ubuntu 16.04 with GCC 7.2 and for general cases it is working fine. My problem comes when I am trying to offload a code that has a call to the sqrtf function that is defined in "math.h". The troubeling code is this:

#pragma omp target teams distribute \
map(to:posx[:n],posy[:n],posz[:n]) \
map(from:frcx[:n],frcy[:n],frcz[:n])
for (int i = 0; i < n; i++) {
  frcx[i] = 0.0f;
  frcy[i] = 0.0f;
  frcz[i] = 0.0f;

  for (int j = 0; j < n; j++) {
    float dx = posx[j] - posx[i];
    float dy = posy[j] - posy[i];
    float dz = posz[j] - posz[i];
    float distSqr = dx*dx + dy*dy + dz*dz + SOFTENING;
    float invDist = 1.0f / sqrtf(distSqr);
    float invDist3 = invDist * invDist * invDist;

    frcx[i] += dx * invDist3;
    frcy[i] += dy * invDist3;
    frcz[i] += dz * invDist3;
  }
}

When I try to compile it with:

$ gcc -Wall -O2 -march=native -mtune=native -fopenmp -o nbody_cpu_arrays_parallel_gpu common_funcs.c nbody_cpu_arrays_parallel_gpu.c -lm
unresolved symbol sqrtf
collect2: error: ld returned 1 exit status
mkoffload: fatal error: x86_64-linux-gnu-accel-nvptx-none-gcc-7 returned 1 exit status
compilation terminated.
lto-wrapper: fatal error: /usr/lib/gcc/x86_64-linux-gnu/7//accel/nvptx-none/mkoffload returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status

How can I make use of square root operations (or other mathematical functions) when offloading OMP code to GPUs?