Update the EAGLE stars

src/stars/EAGLE/stars_iact.h

@@ -38,3 +38,20 @@ runner_iact_nonsym_stars_density(float r2, const float *dx, float hi, float hj,
   ++si->num_ngb_density;
 #endif
 }
+
+/**
+ * @brief Feedback interaction between two particles (non-symmetric).
+ *
+ * @param r2 Comoving square distance between the two particles.
+ * @param dx Comoving vector separating both particles (pi - pj).
+ * @param hi Comoving smoothing-length of particle i.
+ * @param hj Comoving smoothing-length of particle j.
+ * @param si First sparticle.
+ * @param pj Second particle (not updated).
+ * @param a Current scale factor.
+ * @param H Current Hubble parameter.
+ */
+__attribute__((always_inline)) INLINE static void
+runner_iact_nonsym_stars_feedback(float r2, const float *dx, float hi, float hj,
+                                  struct spart *restrict si,
+                                  struct part *restrict pj, float a, float H) {}