Workaround '*_stubborn function is never used' cppcheck warnings

* dbg_mlc.c (GC_debug_malloc_stubborn, GC_debug_change_stubborn): Do
not define if CPPCHECK.
* mallocx.c (GC_malloc_stubborn, GC_end_stubborn_change): Likewise.
* include/gc.h (GC_debug_change_stubborn): Always mark as
GC_ATTR_DEPRECATED (regardless of CPPCHECK).
* tests/test.c [!PCR && !GC_WIN32_THREADS && !GC_PTHREADS && CPPCHECK]
(main): Remove UNTESTED(GC_debug_change_stubborn).

4 files changed, 17 insertions, 18 deletions

diff --git a/dbg_mlc.c b/dbg_mlc.c
index d09f309b..bf24aa35 100644
--- a/dbg_mlc.c
+++ b/dbg_mlc.c
@@ -619,13 +619,15 @@ STATIC void * GC_debug_generic_malloc(size_t lb, int knd, GC_EXTRA_PARAMS)
   }
 #endif /* DBG_HDRS_ALL */
 
-GC_API void * GC_CALL GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
-{
+#ifndef CPPCHECK
+  GC_API void * GC_CALL GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
+  {
     return GC_debug_malloc(lb, OPT_RA s, i);
-}
+  }
 
-GC_API void GC_CALL GC_debug_change_stubborn(
+  GC_API void GC_CALL GC_debug_change_stubborn(
                                 const void * p GC_ATTR_UNUSED) {}
+#endif /* !CPPCHECK */
 
 GC_API void GC_CALL GC_debug_end_stubborn_change(const void *p)
 {
diff --git a/include/gc.h b/include/gc.h
index 753b5c9a..b46ebab2 100644
--- a/include/gc.h
+++ b/include/gc.h
@@ -914,11 +914,7 @@ GC_API void GC_CALL GC_debug_free(void *);
 GC_API void * GC_CALL GC_debug_realloc(void * /* old_object */,
                         size_t /* new_size_in_bytes */, GC_EXTRA_PARAMS)
                         /* 'realloc' attr */ GC_ATTR_ALLOC_SIZE(2);
-GC_API
-#if !defined(CPPCHECK)
-  GC_ATTR_DEPRECATED
-#endif
-void GC_CALL GC_debug_change_stubborn(const void *);
+GC_API GC_ATTR_DEPRECATED void GC_CALL GC_debug_change_stubborn(const void *);
 GC_API void GC_CALL GC_debug_end_stubborn_change(const void *)
                                                         GC_ATTR_NONNULL(1);
 
diff --git a/mallocx.c b/mallocx.c
index 9e93c707..1aa45699 100644
--- a/mallocx.c
+++ b/mallocx.c
@@ -610,15 +610,17 @@ GC_API GC_ATTR_MALLOC char * GC_CALL GC_strndup(const char *str, size_t size)
   }
 #endif /* GC_REQUIRE_WCSDUP */
 
-GC_API void * GC_CALL GC_malloc_stubborn(size_t lb)
-{
-  return GC_malloc(lb);
-}
+#ifndef CPPCHECK
+  GC_API void * GC_CALL GC_malloc_stubborn(size_t lb)
+  {
+    return GC_malloc(lb);
+  }
 
-GC_API void GC_CALL GC_change_stubborn(const void *p GC_ATTR_UNUSED)
-{
-  /* Empty. */
-}
+  GC_API void GC_CALL GC_change_stubborn(const void *p GC_ATTR_UNUSED)
+  {
+    /* Empty. */
+  }
+#endif /* !CPPCHECK */
 
 GC_API void GC_CALL GC_end_stubborn_change(const void *p)
 {
diff --git a/tests/test.c b/tests/test.c
index 8ec8c13f..bccc8382 100644
--- a/tests/test.c
+++ b/tests/test.c
@@ -1969,7 +1969,6 @@ void GC_CALLBACK warn_proc(char *msg, GC_word p)
        UNTESTED(GC_set_stop_func);
        UNTESTED(GC_set_time_limit);
        UNTESTED(GC_malloc_explicitly_typed_ignore_off_page);
-       UNTESTED(GC_debug_change_stubborn);
        UNTESTED(GC_debug_strndup);
        UNTESTED(GC_deinit);
        UNTESTED(GC_strndup);