Mapnik installation issue on centos 7

Hi All, I have been trying to setup osm on centos 7. I have been following this site https://github.com/lijenpan/osm/blob/master/osm-centos7.md. Most of the steps like installing postgres, boost c++ library I did had issue I managed to resolve them too. I am stucked at here git clone git://github.com/mapnik/mapnik

> cd maplink ./configure I got the
> following errors. ./configure scons:
> Reading SConscript files ...

Welcome to Mapnik...

Configuring build environment...
Configuring on Linux in *release mode*...
CXX c++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Checking for freetype-config... yes
Checking for dlfcn.h support ... no
Checking if compiler (c++) supports -std=c++14 flag... (cached) no
C++ compiler does not support C++14 standard (-std=c++14), which is required. Please upgrade your compiler
[root@localhost mapnik]# gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Then I google and manually download the latest release candidate and ran the ./configure command but I end up with different set of errors.

Could not find required header files for boost python Checking for pkg-config... yes Checking for pycairo... yes

Exiting... the following required dependencies were not found: - ltdl (GNU Libtool | more info: http://www.gnu.org/software/libtool) - boost version >=1.47 (more info see: https://github.com/mapnik/mapnik/wiki//MapnikInstallation & http://www.boost.org) - boost system (more info see: https://github.com/mapnik/mapnik/wiki//MapnikInstallation & http://www.boost.org) - boost filesystem (more info see: https://github.com/mapnik/mapnik/wiki//MapnikInstallation & http://www.boost.org) - boost regex (more info see: https://github.com/mapnik/mapnik/wiki//MapnikInstallation & http://www.boost.org) - boost thread (more info see: https://github.com/mapnik/mapnik/wiki//MapnikInstallation & http://www.boost.org) - boost python (more info see: https://github.com/mapnik/mapnik/wiki//MapnikInstallation & http://www.boost.org)

See '/usr/local/mapnik-v2.1.0rc2/config.log' for details on possible problems.

I tried to run yum install libtool-ltdl but it says already installed.