Cleanup: quiet unused but set warnings with CLANG

source/blender/blenkernel/intern/blendfile_link_append.c

@@ -1294,6 +1294,7 @@ void BKE_blendfile_link(BlendfileLinkAppendContext *lapp_context, ReportList *re
     BLO_library_link_end(mainl, &blo_handle, lapp_context->params);
     link_append_context_library_blohandle_release(lapp_context, lib_context);
   }
+  (void)item_idx; /* Quiet set-but-unused warning (may be removed). */
 
   /* Instantiate newly linked IDs as needed, if no append is scheduled. */
   if ((lapp_context->params->flag & FILE_LINK) != 0 &&
@@ -1688,6 +1689,7 @@ void BKE_blendfile_library_relocate(BlendfileLinkAppendContext *lapp_context,
     /* Should not be needed, all tagged IDs should have been deleted above, just 'in case'. */
     BKE_main_id_tag_all(bmain, LIB_TAG_DOIT, false);
   }
+  (void)item_idx; /* Quiet set-but-unused warning (may be removed). */
 
   /* Some datablocks can get reloaded/replaced 'silently' because they are not linkable
    * (shape keys e.g.), so we need another loop here to clear old ones if possible. */

source/blender/blenkernel/intern/gpencil_geom_legacy.cc

@@ -2102,6 +2102,7 @@ void BKE_gpencil_stroke_simplify_adaptive(bGPdata *gpd, bGPDstroke *gps, float e
       le = ls + 1;
     }
   }
+  (void)totmarked; /* Quiet set-but-unused warning (may be removed). */
 
   /* adding points marked */
   MDeformVert *old_dvert = nullptr;

source/blender/blenkernel/intern/tracking.cc

@@ -3121,6 +3121,7 @@ static void tracking_dopesheet_channels_segments_calc(MovieTrackingDopesheetChan
       }
 
       channel->tot_segment++;
+      (void)len; /* Quiet set-but-unused warning (may be removed). */
     }
 
     i++;

source/blender/draw/intern/draw_cache_impl_lattice.c

@@ -400,6 +400,7 @@ static GPUIndexBuf *lattice_batch_cache_get_edges(LatticeRenderData *rdata,
     else {
       BLI_assert(edge_len_real == edge_len);
     }
+    UNUSED_VARS_NDEBUG(edge_len_real);
 
     cache->edges = GPU_indexbuf_build(&elb);
   }

source/blender/editors/armature/meshlaplacian.cc

@@ -1667,6 +1667,7 @@ static void harmonic_coordinates_bind(MeshDeformModifierData *mmd, MeshDeformBin
       totinside++;
     }
   }
+  (void)totinside; /* Quiet set-but-unused warning (may be removed). */
 
   /* free temporary MDefBoundIsects */
   BLI_memarena_free(mdb->memarena);

source/blender/editors/mask/mask_shapekey.c

@@ -167,6 +167,7 @@ static int mask_shape_key_feather_reset_exec(bContext *C, wmOperator *UNUSED(op)
               i_abs++;
             }
           }
+          (void)i_abs; /* Quiet set-but-unused warning (may be removed). */
         }
         else {
           // printf("%s: skipping\n", __func__);
@@ -324,6 +325,7 @@ static int mask_shape_key_rekey_exec(bContext *C, wmOperator *op)
                 i_abs++;
               }
             }
+            (void)i_abs; /* Quiet set-but-unused warning (may be removed). */
 
             BKE_mask_layer_shape_free(mask_layer_shape_tmp);
           }

source/blender/editors/sculpt_paint/paint_cursor.cc

@@ -1091,6 +1091,7 @@ static void cursor_draw_tiling_preview(const uint gpuattr,
       }
     }
   }
+  (void)tile_pass; /* Quiet set-but-unused warning (may be removed). */
 }
 
 static void cursor_draw_point_with_symmetry(const uint gpuattr,

source/blender/geometry/intern/uv_parametrizer.cc

@@ -4162,6 +4162,7 @@ void uv_parametrizer_pack(ParamHandle *handle, float margin, bool do_rotate, boo
       unpacked++;
       continue;
     }
+    (void)unpacked; /* Quiet set-but-unused warning (may be removed). */
 
     geometry::PackIsland *pack_island = new geometry::PackIsland();
     pack_island->caller_index = i;

source/blender/sequencer/intern/image_cache.c

@@ -437,6 +437,7 @@ static SeqCacheKey *seq_cache_get_item_for_removal(Scene *scene)
       rkey = key;
     }
   }
+  (void)total_count; /* Quiet set-but-unused warning (may be removed). */
 
   finalkey = seq_cache_choose_key(scene, lkey, rkey);