From Franc,ois: should we keep the directory part in the CPP guard?
+* Yacc.c: CPP Macros
+
+Do some people use YYPURE, YYLSP_NEEDED like we do in the test suite?
+They should not: it is not documented. But if they need to, let's
+find something clean (not like YYLSP_NEEDED...).
+
+
* readpipe
It should be replaced to avoid tmp files and to improve portability.