isl_map_subtract.c: make some internal functions static

diff --git a/isl_map_subtract.c b/isl_map_subtract.c
index 9dcf7c9..51fedcf 100644 (file)
--- a/isl_map_subtract.c
+++ b/isl_map_subtract.c
@@ -339,7 +339,7 @@ struct isl_subtract_diff_collector {
 
 /* isl_subtract_diff_collector callback.
  */
-int basic_map_subtract_add(struct isl_diff_collector *dc,
+static int basic_map_subtract_add(struct isl_diff_collector *dc,
                            __isl_take isl_basic_map *bmap)
 {
        struct isl_subtract_diff_collector *sdc;
@@ -430,7 +430,7 @@ struct isl_is_empty_diff_collector {
 
 /* isl_is_empty_diff_collector callback.
  */
-int basic_map_is_empty_add(struct isl_diff_collector *dc,
+static int basic_map_is_empty_add(struct isl_diff_collector *dc,
                            __isl_take isl_basic_map *bmap)
 {
        struct isl_is_empty_diff_collector *edc;