Add missing empty functions in the const-Lambda and const-du cooling models

src/cooling/EAGLE/cooling.c

@@ -667,7 +667,7 @@ float cooling_get_temperature(
  * @brief Compute the electron pressure of a #part based on the cooling
  * function.
  *
- * There are no subgrid properties in this model, we return 0.
+ * Does not exist in this model. We return 0.
  *
  * @param phys_const #phys_const data structure.
  * @param hydro_props The properties of the hydro scheme.

src/cooling/const_du/cooling.h

@@ -148,6 +148,53 @@ __attribute__((always_inline)) INLINE static float cooling_timestep(
   return cooling->cooling_tstep_mult * internal_energy / fabsf(cooling_rate);
 }
 
+/**
+ * @brief Compute the electron pressure of a #part based on the cooling
+ * function.
+ *
+ * Does not exist in this model. We return 0.
+ *
+ * @param phys_const #phys_const data structure.
+ * @param hydro_props The properties of the hydro scheme.
+ * @param us The internal system of units.
+ * @param cosmo #cosmology data structure.
+ * @param cooling #cooling_function_data struct.
+ * @param p #part data.
+ * @param xp Pointer to the #xpart data.
+ */
+__attribute__((always_inline)) INLINE static double
+cooling_get_electron_pressure(const struct phys_const* phys_const,
+                              const struct hydro_props* hydro_props,
+                              const struct unit_system* us,
+                              const struct cosmology* cosmo,
+                              const struct cooling_function_data* cooling,
+                              const struct part* p, const struct xpart* xp) {
+  return 0;
+}
+
+/**
+ * @brief Compute the y-Compton contribution of a #part based on the cooling
+ * function.
+ *
+ * Does not exist in this model. We return 0.
+ *
+ * @param phys_const #phys_const data structure.
+ * @param hydro_props The properties of the hydro scheme.
+ * @param us The internal system of units.
+ * @param cosmo #cosmology data structure.
+ * @param cooling #cooling_function_data struct.
+ * @param p #part data.
+ * @param xp Pointer to the #xpart data.
+ */
+__attribute__((always_inline)) INLINE static double cooling_get_ycompton(
+    const struct phys_const* phys_const, const struct hydro_props* hydro_props,
+    const struct unit_system* us, const struct cosmology* cosmo,
+    const struct cooling_function_data* cooling, const struct part* p,
+    const struct xpart* xp) {
+  error("This cooling model does not compute Compton Y!");
+  return 0.;
+}
+
 /**
  * @brief Sets the cooling properties of the (x-)particles to a valid start
  * state.

src/cooling/const_lambda/cooling.h

@@ -228,6 +228,53 @@ __attribute__((always_inline)) INLINE static float cooling_timestep(
     return cooling->cooling_tstep_mult * u / fabsf(cooling_du_dt);
 }
 
+/**
+ * @brief Compute the electron pressure of a #part based on the cooling
+ * function.
+ *
+ * Does not exist in this model. We return 0.
+ *
+ * @param phys_const #phys_const data structure.
+ * @param hydro_props The properties of the hydro scheme.
+ * @param us The internal system of units.
+ * @param cosmo #cosmology data structure.
+ * @param cooling #cooling_function_data struct.
+ * @param p #part data.
+ * @param xp Pointer to the #xpart data.
+ */
+__attribute__((always_inline)) INLINE static double
+cooling_get_electron_pressure(const struct phys_const* phys_const,
+                              const struct hydro_props* hydro_props,
+                              const struct unit_system* us,
+                              const struct cosmology* cosmo,
+                              const struct cooling_function_data* cooling,
+                              const struct part* p, const struct xpart* xp) {
+  return 0;
+}
+
+/**
+ * @brief Compute the y-Compton contribution of a #part based on the cooling
+ * function.
+ *
+ * Does not exist in this model. We return 0.
+ *
+ * @param phys_const #phys_const data structure.
+ * @param hydro_props The properties of the hydro scheme.
+ * @param us The internal system of units.
+ * @param cosmo #cosmology data structure.
+ * @param cooling #cooling_function_data struct.
+ * @param p #part data.
+ * @param xp Pointer to the #xpart data.
+ */
+__attribute__((always_inline)) INLINE static double cooling_get_ycompton(
+    const struct phys_const* phys_const, const struct hydro_props* hydro_props,
+    const struct unit_system* us, const struct cosmology* cosmo,
+    const struct cooling_function_data* cooling, const struct part* p,
+    const struct xpart* xp) {
+  error("This cooling model does not compute Compton Y!");
+  return 0.;
+}
+
 /**
  * @brief Sets the cooling properties of the (x-)particles to a valid start
  * state.