Errors building RMagick on Linux

Here are the sequence of commands that I've done running CentOS 4.3.
When I do the very last command 'make', I get the errors below. Any
ideas? thanks! chirag

cd /usr/local/src
wget http://image_magick.veidrodis.com/image_magick/ImageMagick.tar.gz
tar xvzf ImageMagick.tar.gz
cd ImageMagick-X.Y.Z
./configure --disable-static --with-modules --without-perl \
--without-magick-plus-plus --with-quantum-depth=8
make
make install

wget http://files.rubyforge.mmmultiworks.com/rmagick/RMagick-1.15.11.tar.gz
tar zxvf RMagick-1.15.11.tar.gz
cd RMagick-1.15.4
./configure
export LD_LIBRARY_PATH=/usr/local/lib
echo $LD_LIBRARY_PATH
make