I got the following error when I ./configure.
configure: error: png library not found... please install png.

What package I should install?

[mike@localhost webalizer-2.01-10]$ sudo ./configure
Password:
loading cache ./config.cache
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 whether ln -s works... yes
checking for a BSD compatible install... /usr/bin/install -c
checking how to run the C preprocessor... gcc -E
checking whether char is unsigned... no
checking for main in -l44bsd... no
checking for main in -lm... yes
checking for main in -lz... yes
checking for gzrewind in -lz... yes
checking for main in -lpng... no
configure: error: png library not found... please install png.

erm.. you should install libpng, as that's what it's asking for....

Where I can get libpng rpm package for Red Hat Linux 3.2.3-47?

your RHEL3 cd's

I still get the error message. But libpng is installed. Why I still cannot install webalizer.

[mike@localhost webalizer-2.01-10]$ rpm -qa | grep png
libpng-1.2.2-25

you need libpng-devel