Problem configuring binutils-2.9.1

[Franklyn Simon]

Hi,

In configuring binutils-2.9.1, I get the following messages:

checking lex output file root ./configure:line 1701: lex command not found
configure error cannot find output from lex: giving up
configure in /opt/gcc-4.3.2/binutils-2.9.1 failed exist.

My question is: Is this a nornal error?  Can you please help.

I am configuring and installing prerequisites for GCC

Thx