diff --git a/lib_debug/wmc_auto.c b/lib_debug/wmc_auto.c
index 30e7733f93523460838058541cadea64972e87c5..60c8df3006c48893d7570237f02a6111a3eadf74 100644
--- a/lib_debug/wmc_auto.c
+++ b/lib_debug/wmc_auto.c
@@ -818,7 +818,6 @@ static void *mem_alloc_block( size_t size, const char *size_str );
 
 void reset_mem( Counting_Size cnt_size )
 {
-    int16_t something;
     size_t tmp_size;
 
     /* initialize list of stack records */
@@ -838,7 +837,13 @@ void reset_mem( Counting_Size cnt_size )
     max_num_calls = MAX_NUM_RECORDS;
 
     /* initialize stack pointers */
+#if defined( __GNUC__ ) || defined( __clang__ )
+    /* GCC/Clang: use builtin (works for many targets) */
+    ptr_base_stack = __builtin_frame_address( 0 );
+#else
+    int16_t something;
     ptr_base_stack = &something;
+#endif
     ptr_max_stack = ptr_base_stack;
     ptr_current_stack = ptr_base_stack;
 
@@ -943,10 +948,14 @@ void reset_mem( Counting_Size cnt_size )
 
 void reset_stack( void )
 {
-    int16_t something;
-
     /* initialize/reset stack pointers */
+#if defined( __GNUC__ ) || defined( __clang__ )
+    /* GCC/Clang: use builtin (works for many targets) */
+    ptr_base_stack = __builtin_frame_address( 0 );
+#else
+    int16_t something;
     ptr_base_stack = &something;
+#endif
     ptr_max_stack = ptr_base_stack;
     ptr_current_stack = ptr_base_stack;
 
@@ -961,10 +970,15 @@ void reset_stack( void )
 
 int push_stack( const char *filename, const char *fctname )
 {
-    int16_t something;
     int32_t current_stack_size;
 
-    ptr_current_stack = &something;
+#if defined( __GNUC__ ) || defined( __clang__ )
+    /* GCC/Clang: use builtin (works for many targets) */
+    ptr_base_stack = __builtin_frame_address( 0 );
+#else
+    int16_t something;
+    ptr_base_stack = &something;
+#endif
 
     (void) *filename; /* to avoid compilation warning */