Fix leaked function symbols

- `free_heap()` in src/gc.c
- `symhash()` in src/symbol.c
- `no_optimize()` in mrbgems/mruby-compiler/core/codegen.c

2 files changed, 2 insertions, 2 deletions

diff --git a/src/gc.c b/src/gc.c
index ec52787e8..d07335eca 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -396,7 +396,7 @@ mrb_gc_init(mrb_state *mrb, mrb_gc *gc)
 
 static void obj_free(mrb_state *mrb, struct RBasic *obj, int end);
 
-void
+static void
 free_heap(mrb_state *mrb, mrb_gc *gc)
 {
   mrb_heap_page *page = gc->heaps;
diff --git a/src/symbol.c b/src/symbol.c
index 96ca9dd17..b26f2b1fd 100644
--- a/src/symbol.c
+++ b/src/symbol.c
@@ -91,7 +91,7 @@ sym_inline_unpack(mrb_sym sym, char *buf, mrb_int *lenp)
 }
 #endif
 
-uint8_t
+static uint8_t
 symhash(const char *key, size_t len)
 {
     uint32_t hash, i;