Prerequisites:
rpm -ivh $CENTOS/bzip2-devel-1.0.3-3.x86_64.rpm
rpm -ivh $CENTOS/libidn-0.6.5-1.1.x86_64.rpm
rpm -ivh $CENTOS/curl-7.15.5-2.el5.x86_64.rpm
rpm -ivh $CENTOS/pkgconfig-0.21-1.fc6.x86_64.rpm
rpm -ivh $CENTOS/libidn-devel-0.6.5-1.1.x86_64.rpm
rpm -ivh $CENTOS/e2fsprogs-devel-1.39-10.el5.x86_64.rpm
rpm -ivh $CENTOS/krb5-devel-1.6.1-17.el5.x86_64.rpm
rpm -ivh $CENTOS/zlib-devel-1.2.3-3.x86_64.rpm
rpm -ivh $CENTOS/openssl-devel-0.9.8b-8.3.el5_0.2.x86_64.rpm
rpm -ivh $CENTOS/flex-2.5.4a-41.fc6.x86_64.rpm
rpm -ivh $CENTOS/libstdc++-devel-4.1.2-14.el5.x86_64.rpm
rpm -ivh $CENTOS/libxml2-devel-2.6.26-2.1.2.x86_64.rpm
rpm -ivh $CENTOS/libxslt-devel-1.1.17-2.x86_64.rpm
rpm -ivh $CENTOS/nmap-4.11-1.1.x86_64.rpm
rpm -ivh $CENTOS/swig-1.3.29-2.el5.x86_64.rpm
rpm -ivh $CENTOS/apr-1.2.7-11.x86_64.rpm
rpm -ivh $CENTOS/apr-util-1.2.7-6.x86_64.rpm
rpm -ivh $CENTOS/neon-0.25.5-5.1.x86_64.rpm
rpm -ivh $CENTOS/perl-URI-1.35-3.noarch.rpm
rpm -ivh $CENTOS/subversion-1.4.2-2.el5.x86_64.rpm
rpm -ivh $CENTOS/libtool-ltdl-1.5.22-6.1.x86_64.rpm
rpm -ivh $CENTOS/libtool-1.5.22-6.1.x86_64.rpm
rpm -ivh $CENTOS/libtool-ltdl-devel-1.5.22-6.1.x86_64.rpm
rpm -ivh $CENTOS/guile-1.8.0-8.20060831cvs.x86_64.rpm
rpm -ivh $CENTOS/libX11-devel-1.0.3-8.0.1.el5.x86_64.rpm $CENTOS/libXau-devel-1.0.1-3.1.x86_64.rpm $CENTOS/xorg-x11-proto-devel-7.1-9.el5.centos.x86_64.rpm $CENTOS/mesa-libGL-devel-6.5.1-7.5.el5.x86_64.rpm $CENTOS/libXdmcp-devel-1.0.1-2.1.x86_64.rpm
rpm -ivh $CENTOS/libjpeg-devel-6b-37.x86_64.rpm
rpm -ivh $CENTOS/libpng-1.2.10-7.0.2.x86_64.rpm
rpm -ivh $CENTOS/freetype-2.2.1-19.el5.x86_64.rpm
rpm -ivh $CENTOS/freetype-devel-2.2.1-19.el5.x86_64.rpm
rpm -ivh $CENTOS/gd-devel-2.0.33-9.3.fc6.x86_64.rpm $CENTOS/fontconfig-devel-2.4.1-6.el5.x86_64.rpm $CENTOS/libXpm-devel-3.5.5-3.x86_64.rpm $CENTOS/libpng-devel-1.2.10-7.0.2.x86_64.rpm $CENTOS/gd-2.0.33-9.3.fc6.x86_64.rpm

1. Install proj4
-tar -zxvf proj-4.4.9.tar.gz
-./configure
-make
-make install

2. Install geos
-bzip2 -d geos-3.0.0.tar.bz2
-tar -xvf geos-3.0.0.tar
-./configure –enable-python
-make
-make install

3. install postgres and postgis
rpm -ivh postgresql-libs-8.3.1-1PGDG.rhel5.x86_64.rpm
rpm -ivh postgresql-8.3.1-1PGDG.rhel5.x86_64.rpm
rpm -ivh postgresql-devel-8.3.1-1PGDG.rhel5.x86_64.rpm
rpm -ivh postgresql-server-8.3.1-1PGDG.rhel5.x86_64.rpm
rpm -ivh postgresql-contrib-8.3.1-1PGDG.rhel5.x86_64.rpm
rpm -ivh postgresql-plperl-8.3.1-1PGDG.rhel5.x86_64.rpm
rpm -ivh postgresql-plpython-8.3.1-1PGDG.rhel5.x86_64.rpm

# tar -zxvf postgis-1.3.3.tar.gz
# cd postgis-1.3.3
# ./configure –with-pgsql=/usr/bin/pg_config
# make
# make install

If you need to put the postgres data for mapserver, then:
initdb -E utf8 -D /var/lib/pgsql/data

3. install gdal
./configure –with-png –with-libtiff –with-static-proj4=/usr/local/bin –with-python –with-perl –with-geos –with-pg=/usr/bin/pg_config

Note: If there is an error regarding libxpat.so because of 64 bit libraries, then edit GDALmake.opt and change /usr/lib to /usr/lib64
http://www.nabble.com/GDAL-v1.5.1-compile-error-on-RHEL5.-td17428872.html

GDAL is now configured for i686-pc-linux-gnu

Installation directory: /usr/local
C compiler: gcc -O2
C++ compiler: g++ -O2

LIBTOOL support: yes

LIBZ support: external
GRASS support: no
CFITSIO support: no
PCRaster support: internal
NETCDF support: no
LIBPNG support: external
LIBTIFF support: external
LIBGEOTIFF support: internal
LIBJPEG support: external
LIBGIF support: external
OGDI support: no
HDF4 support: no
HDF5 support: no
KAKADU support: no
JASPER support: no
ECW support: no
MrSID support: no
CURL support (wcs): yes
POSTGRESQL support: yes
MySQL support: yes
XERCES support: no
ODBC support: no
PGEO support: no
OCI support: no
SDE support: no
DODS support: no
SQLite support: no
DWGdirect support no
PANORAMA GIS support: no
INFORMIX DataBlade support:no
GEOS support: yes

Statically link PROJ.4: yes

Traditional Python: yes
NG SWIG Bindings: perl

enable OGR building: yes

make
make install

4. Remove any existing apache from rpm then install apache2 by source.
rpm -e httpd-2.2.3-11.el5.centos gnome-user-share-0.10-6.el5.x86_64
./configure –prefix=/usr/local/apache2 –enable-rewrite –enable-so –with-mpm=prefork
make
make install

5. rpm -ivh alsa-lib-devel-1.0.14-1.rc4.el5.x86_64.rpm esound-0.2.36-3.x86_64.rpm esound-devel-0.2.36-3.x86_64.rpm audiofile-0.2.6-5.x86_64.rpm mesa-libGLU-6.5.1-7.5.el5.x86_64.rpm mesa-libGLU-devel-6.5.1-7.5.el5.x86_64.rpm libXext-1.0.1-2.1.x86_64.rpm libXext-devel-1.0.1-2.1.x86_64.rpm libXrandr-devel-1.1.1-3.1.x86_64.rpm libXrender-devel-0.9.1-3.1.x86_64.rpm libXt-devel-1.0.2-3.1.fc6.x86_64.rpm audiofile-devel-0.2.6-5.x86_64.rpm libSM-devel-1.0.1-3.1.x86_64.rpm libICE-devel-1.0.1-2.1.x86_64.rpm

6. rpm -ivh SDL-1.2.10-8.el5.x86_64.rpm SDL-devel-1.2.10-8.el5.x86_64.rpm

7. Dont use agg-2.4! PLEASE read this post from mapserver trac ticket. Instead, download the packages form http://dag.wieers.com/rpm/packages/agg/

Note: For 64-bit packages:
- http://dag.wieers.com/rpm/packages/agg/agg-2.5-1.el5.rf.x86_64.rpm
- http://dag.wieers.com/rpm/packages/agg/agg-devel-2.5-1.el5.rf.x86_64.rpm

8. install mapserver. This assumes you have PHP, APACHE, POSTGRES, POSTGIS,
MYSQL already installed.

./configure \
–with-agg \
–with-jpeg \
–with-gd \
–with-freetype \
–with-png \
–with-ogr \
–with-proj \
–with-gdal \
–with-httpd=/usr/local/apache2/bin/httpd \
–with-tiff \
–with-wfs \
–with-wcs \
–with-sos \
–with-wmsclient \
–with-wfsclient \
–with-geos=/usr/local/bin/geos-config \
–with-gdal=/usr/local/bin/gdal-config \
–with-postgis=/usr/bin/pg_config

-make
-make install

9. Post Install Considerations:
ln -s /usr/local/lib/libproj.so.0 /usr/lib/libproj.so.0
ln -s /usr/local/lib/libgdal.so.1 /usr/lib/libgdal.so.1
ln -s /usr/local/lib/libgeos_c.so.1 /usr/lib/libgeos_c.so.1
ldconfig

10. cp -rf mapserv /usr/local/apache2/cgi-bin/
check mapserv
./mapserv -v
MapServer version 5.0.3 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=GEOS INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

11. cp the ff:
cp legend scalebar shp2img shp2pdf shptree shptreetst shptreevis sortshp
tile4ms /usr/local/apache2/cgi-bin/

12. cp $mapserver_install_dir/mapscript/php3/php_mapscript.so /usr/local/apache2/modules/

######################################
11. edit httpd.conf
setenv LD_LIBRARY_PATH /usr/local/lib

12. vi /etc/ld.so.conf
Add the following lines:
/usr/local/include
/usr/local/lib
run:
13 ldconfig