compile l4 source files: idl-parser-driver.hh:62:1: error

 Hi,
when I compile TUDOS/lEnv tree downloaded form svn.tudo.org
, many errors apear in /todu/dice/src/parser/idl:
{{{
g++ -DHAVE_CONFIG_H -I. -I. -I../../..  -I../../../src -Wall
-I../../../src  -g -O2 -MT idl-parser.tab.o -MD -MP -MF
.deps/idl-parser.tab.Tpo -c -o idl-parser.tab.o
idl-parser.tab.cc
In file included from idl-parser.yy:109:0:
idl-parser-driver.hh:62:1: error： ‘token_type’ in ‘class
yy::idl_parser’ does not name a type
idl-parser.tab.cc: in function‘virtual int yy::idl_parser::parse()’:
idl-parser.tab.cc:352:42: error： ‘idllex' not declared in this scope
make[7]: *** [idl-parser.tab.o] Error 1
make[7]: Leaving directory ‘/todu/dice/src/parser/idl’
make[6]: *** [all-recursive] Error 1
make[6]: Leaving directory ‘todu/dice/src/parser’
}}}
Any help is appreciated
yuqing wang

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