Mark a variable as unused in non-MPI build

diff --git a/src/gromacs/ewald/pme_pp.cpp b/src/gromacs/ewald/pme_pp.cpp
index 6b6d3c5832cdb0807f9d97d1a22b84618be114df..d9f92d146e2f6c687fead285b2c60c6136f1f749 100644 (file)
--- a/src/gromacs/ewald/pme_pp.cpp
+++ b/src/gromacs/ewald/pme_pp.cpp
@@ -293,6 +293,7 @@ static void gmx_pme_send_coeffs_coords(t_forcerec*                    fr,
     GMX_UNUSED_VALUE(c6B);
     GMX_UNUSED_VALUE(sigmaA);
     GMX_UNUSED_VALUE(sigmaB);
+    GMX_UNUSED_VALUE(x);
     GMX_UNUSED_VALUE(reinitGpuPmePpComms);
     GMX_UNUSED_VALUE(sendCoordinatesFromGpu);
     GMX_UNUSED_VALUE(coordinatesReadyOnDeviceEvent);