bug:

----------------------------------------------------------------------
#define hexCh(c (c >= 10 ? 'a' + c - 10 : '0' + c)
  hexCh(c);

out:
jiang@jiang:~/test$ ./tcc -E c4.c
# 1 "c4.c"

(c >= 10 ? 'a' + c - 10 : '0' + c);
---------------------------------------------------------------

#define hexCh(c/3) (c >= 10 ? 'a' + c - 10 : '0' + c)
hexCh(c);

out:
jiang@jiang:~/test$ ./tcc -E c4.c
# 1 "c4.c"

/3) (c >= 10 ? 'a' + c - 10 : '0' + c);
jiang@jiang:~/test$

after patch:

# 1 "c4.c"
c4.c:1: error: may not appear in macro parameter list: "("
jiang@jiang:~/test$

jiang@jiang:~/test$ ./tcc -E c4.c
# 1 "c4.c"
c4.c:1: error: may not appear in macro parameter list: "/"
jiang@jiang:~/test$

1 files changed, 3 insertions, 4 deletions

diff --git a/tccpp.c b/tccpp.c
index 2da65cd..0cea7cf 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -1239,16 +1239,15 @@ ST_FUNC void parse_define(void)
                 next_nomacro();
             }
             if (varg < TOK_IDENT)
-                tcc_error("badly punctuated parameter list");
+                tcc_error( "\'%s\' may not appear in parameter list", get_tok_str(varg, NULL));
             s = sym_push2(&define_stack, varg | SYM_FIELD, is_vaargs, 0);
             *ps = s;
             ps = &s->next;
             if (tok != ',')
-                break;
+                continue;
             next_nomacro();
         }
-        if (tok == ')')
-            next_nomacro_spc();
+        next_nomacro_spc();
         t = MACRO_FUNC;
     }
     tok_str_new(&str);