pecl install intlしたいがintlがインストールできない。

お世話になっております。
表題の通りpect intlをインストールしたいのですが、できません。
CakePHPをインストールしたいのですが、つまずいています。

環境はPHP5.6 CentOS7です。

打ち込んだコマンド
#perl install intl

###発生している問題・エラーメッセージ
WARNING: channel "pecl.php.net" has updated its protocols, use "pecl channel-update pecl.php.net" to update
downloading intl-3.0.0.tgz ...
Starting to download intl-3.0.0.tgz (248,200 bytes)
..........................done: 248,200 bytes
150 source files, building
running: phpize
Configuring for:
PHP Api Version: 20131106
Zend Module Api No: 20131226
Zend Extension Api No: 220131226
Specify where ICU libraries and headers can be found [DEFAULT] : y
building in /var/tmp/pear-build-yokokawamasaruFtiKAi/intl-3.0.0
running: /var/tmp/intl/configure --with-php-config=/usr/bin/php-config --with-icu-dir=y
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for a sed that does not truncate output... /usr/bin/sed
checking for cc... cc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ISO C89... none needed
checking how to run the C preprocessor... cc -E
checking for icc... no
checking for suncc... no
checking whether cc understands -c and -o together... yes
checking for system library directory... lib
checking if compiler supports -R... no
checking if compiler supports -Wl,-rpath,... yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
checking for PHP prefix... /usr
checking for PHP includes... -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib
checking for PHP extension directory... /usr/lib64/php/modules
checking for PHP installed headers prefix... /usr/include/php
checking if debug is enabled... no
checking if zts is enabled... no
checking for re2c... no
configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
checking for gawk... gawk
checking whether to enable internationalization support... yes, shared
checking for location of ICU headers and libraries... not found
configure: error: Unable to detect ICU prefix or y/bin/icu-config failed. Please verify ICU install prefix and make sure icu-config works.
ERROR: `/var/tmp/intl/configure --with-php-config=/usr/bin/php-config --with-icu-dir=y' failed