title: Trouble Installing libsodium on Centos 6
body: <p>I'm running CENTOS 6.7 and Apache and PHP 5.4.x. I'm using the EPEL and REMI repositories. I'm trying to install the <code>libsodium</code> extension.</p>
  
  <p>It is my understanding that I need to install <code>libsodium</code> first, then the extension. Based on Googling, to get the right version, I ended on:</p>
  
  <pre><code>yum --enablerepo=remi install php54-php-pecl-libsodium
  </code></pre>
  
  <p>and I get the following result:</p>
  
  <pre><code>Installed:
    php54-php-pecl-libsodium.x86_64 0:1.0.5-1.el6.remi
  
  Dependency Installed:
    audit-libs-python.x86_64 0:2.3.7-5.el6
    environment-modules.x86_64 0:3.2.10-2.el6
    libcgroup.x86_64 0:0.40.rc1-17.el6_7
    libselinux-python.x86_64 0:2.0.94-5.8.el6
    libsemanage-python.x86_64 0:2.0.43-5.1.el6
    php54-php-common.x86_64 0:5.4.45-7.el6.remi
    php54-runtime.x86_64 0:2.1-4.el6.remi
    policycoreutils-python.x86_64 0:2.0.83-24.el6
    setools-libs.x86_64 0:3.3.7-4.el6
    setools-libs-python.x86_64 0:3.3.7-4.el6
    tcl.x86_64 1:8.5.7-6.el6
  </code></pre>
  
  <p>Then I type in:</p>
  
  <pre><code>pecl install libsodium
  </code></pre>
  
  <p>and I get:</p>
  
  <pre><code>[root@core3 tmp]# pecl install libsodium
  downloading libsodium-1.0.5.tgz ...
  Starting to download libsodium-1.0.5.tgz (169,801 bytes)
  .....................................done: 169,801 bytes
  9 source files, building
  running: phpize
  Configuring for:
  PHP Api Version:         20100412
  Zend Module Api No:      20100525
  Zend Extension Api No:   220100525
  building in /var/tmp/pear-build-rootAHK93D/libsodium-1.0.5
  running: /var/tmp/libsodium/configure --with-php-config=/usr/bin/php-config
  checking for grep that handles long lines and -e... /bin/grep
  checking for egrep... /bin/grep -E
  checking for a sed that does not truncate output... /bin/sed
  checking for cc... cc
  checking for C compiler default output file name... a.out
  checking whether the C compiler works... yes
  checking whether we are cross compiling... no
  checking for suffix of executables...
  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... re2c
  checking for re2c version... 0.13.5 (ok)
  checking for gawk... gawk
  checking for libsodium support... yes, shared
  checking for libsodium files in default path... not found
  configure: error: Please install libsodium - See https://github.com/jedisct1/libsodium
  ERROR: `/var/tmp/libsodium/configure --with-php-config=/usr/bin/php-config' failed
  </code></pre>
  
  <p>You can see the error seems to indicate that libsodium is not installed when it is. Am I missing a step?</p>