allow redefinition of func_old_type functions

    void *memcpy(void*, const void*, unsigned);

This gave an error if memcpy() has been used before
implicitely,  e.g. for structure passing etc.

1 files changed, 7 insertions, 4 deletions

diff --git a/tccgen.c b/tccgen.c
index 933f76d..7ac05d3 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -115,10 +115,13 @@ static Sym *external_sym(int v, CType *type, int r)
         /* push forward reference */
         s = sym_push(v, type, r | VT_CONST | VT_SYM, 0);
         s->type.t |= VT_EXTERN;
-    } else {
-        if (!is_compatible_types(&s->type, type))
-            error("incompatible types for redefinition of '%s'", 
-                  get_tok_str(v, NULL));
+    } else if (s->type.ref == func_old_type.ref) {
+        s->type.ref = type->ref;
+        s->r = r | VT_CONST | VT_SYM;
+        s->type.t |= VT_EXTERN;
+    } else if (!is_compatible_types(&s->type, type)) {
+        error("incompatible types for redefinition of '%s'", 
+              get_tok_str(v, NULL));
     }
     return s;
 }