HELP!. INstalling PHP4 on a Cobalt RAQ 2!

Hi Im trying to isntall PHP4 on my Raq 2 but Im not having much luck. I was wondering if someone here could assist me. I uploaded apache and configured it and it worked fine. Its running in /usr/local/apache-x.x.x I uploaded the php zipped binary by ftp to /home/sites/home then mv php-4.0.4.tar.gz /usr/local then I unpacked it gunzip php-4.0.4.tar.gz then tar vxf php-4.0.4.tar It unpacked fine. I changed firectories cd php-4.0.4 I did the configure thing ./configure --with-mysql --with-apache=../apache_1.3.14 --enable-track-vars I pressed enter and it said loading config.cache and a long list of things came up. Then it ended and this was what I got. checking for working makeinfo... found checking whether to enable maintainer-specific portions of Makefiles... no checking host system type... mipsel-unknown-linux-gnu checking for gawk... gawk checking for bison... bison -y checking bison version... 1.25 (ok) checking for gcc... gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc ) is a cross-compiler... no checking whether we are using GNU C... yes checking whether gcc accepts -g... yes checking how to run the C preprocessor... gcc -E checking for AIX... no checking for gcc option to accept ANSI C... none needed checking for ranlib... ranlib checking whether gcc and cc understand -c and -o together... yes checking whether ln -s works... yes checking for flex... no checking for lex... no ./configure: flex: command not found checking for flex... lex checking for yywrap in -ll... no checking lex output file root... ./configure: lex: command not found configure: error: cannot find output from lex; giving up [root php-4.0.4]# If anyone can help me i would greatly appreciate it. Thanks.