[firelet]

Today I install OpenFOAM v2.0.0 on Redhat Enterprise 5.0, there are some error as follows,

triSurface/interfaces/STL/readSTLASCII.L:59:25: error: no 'int yyFlexLexer::yywrap()' member function declared in class 'yyFlexLexer'
Make/linux64GccDPOpt/readSTLASCII.C: In member function 'int STLLexer::lex()':
Make/linux64GccDPOpt/readSTLASCII.C:5526:10: error: 'yy_buffer_stack' was not declared in this scope
Make/linux64GccDPOpt/readSTLASCII.C:5526:10: error: 'yy_buffer_stack_top' was not declared in this scope
Make/linux64GccDPOpt/readSTLASCII.C:5527:27: error: 'yyensure_buffer_stack' was not declared in this scope
Make/linux64GccDPOpt/readSTLASCII.C:5549:57: warning: use of old-style cast
Make/linux64GccDPOpt/readSTLASCII.C:5549:57: warning: use of old-style cast
Make/linux64GccDPOpt/readSTLASCII.C:5565:3: warning: use of old-style cast
Make/linux64GccDPOpt/readSTLASCII.C:5779:62: warning: use of old-style cast
Make/linux64GccDPOpt/readSTLASCII.C:5785:8: error: 'yy_buffer_stack' was not declared in this scope

How to solve this problem?
Thank you