Fix warning about redefined macro when multiple scanners are used.

diff --git a/src/main.c b/src/main.c
index 8a70b8d5a69415cc0538a140ff5e493428cd5170..87107022804ce4e38e78fe1efee1d7b864546d8a 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -1686,6 +1686,10 @@ void readin ()
                        }
                        else {
                                outn ("extern char *yytext;");
+
+                               outn("#ifdef yytext_ptr");
+                               outn("#undef yytext_ptr");
+                               outn("#endif");
                                outn ("#define yytext_ptr yytext");
                        }
                }