title: Error installing HHVM at the very end CentOS 6.6
body: <p>Carefully followed the inscructions at: <a href="https://github.com/facebook/hhvm/wiki/Building-and-installing-HHVM-on-CentOS-6.6" rel="nofollow">https://github.com/facebook/hhvm/wiki/Building-and-installing-HHVM-on-CentOS-6.6</a></p>
  
  <p>Get to the very end and it fails. Rather frustrating. Any idea what the problem might be?</p>
  
  <pre><code>-- Found LIBGLOG: /usr/local/lib/libglog.so
  -- Could NOT find LIBINOTIFY (missing:  LIBINOTIFY_LIBRARY)
  -- Could NOT find LIBICONV (missing:  LIBICONV_LIBRARY)
  -- Performing Test LIBICONV_CONST
  -- Performing Test LIBICONV_CONST - Failed
  -- Found PkgConfig: /usr/bin/pkg-config (found version "0.23")
  -- Found LIBMEMCACHED: /usr/local/lib/libmemcached.so
  -- Found PCRE: /usr/lib64/libpcre.so
  -- Performing Test SYSTEM_PCRE_HAS_JIT
  -- Performing Test SYSTEM_PCRE_HAS_JIT - Failed
  -- System PCRE does not have JIT enabled - will use hhvm-third-party/pcre
  -- Found libevent: /usr/lib64/libevent.so
  -- Looking for evhttp_bind_socket_with_fd
  -- Looking for evhttp_bind_socket_with_fd - not found
  -- Could NOT find LibUODBC (missing:  LIBODBC_LIBRARIES LIBODBC_INCLUDE_DIRS)
  -- Found CURL: /usr/lib64/libcurl.so (found version "7.19.7")
  -- Looking for curl_multi_select
  -- Looking for curl_multi_select - not found
  -- Looking for curl_multi_wait
  -- Looking for curl_multi_wait - not found
  -- Found LibXml2: /usr/lib64/libxml2.so (found version "2.7.6")
  -- Found LibXslt: /usr/lib64/libxslt.so (found version "1.1.26")
  -- Found EXPAT: /usr/lib64/libexpat.so (found version "2.0.1")
  -- Using third-party bundled libsqlite3
  -- Could NOT find DOUBLE_CONVERSION (missing:  DOUBLE_CONVERSION_LIBRARY DOUBLE_CONVERSION_INCLUDE_DIR)
  -- Using third-party bundled double-conversion
  -- Could NOT find LZ4 (missing:  LZ4_LIBRARY LZ4_INCLUDE_DIR)
  -- Using third-party bundled LZ4
  -- Could NOT find FastLZ (missing:  FASTLZ_LIBRARY FASTLZ_INCLUDE_DIR)
  -- Using third-party bundled fastlz
  -- Could NOT find LIBZIP (missing:  LIBZIP_LIBRARY LIBZIP_INCLUDE_DIR_ZIP LIBZIP_INCLUDE_DIR_ZIPCONF)
  -- Using third-party bundled libzip
  -- Found ICU header files in /usr/include
  -- Found ICU libraries: /usr/lib64/libicuuc.so
  -- Performing Test JEMALLOC_VERSION_MINIMUM
  -- Performing Test JEMALLOC_VERSION_MINIMUM - Success
  -- Found jemalloc: /usr/local/lib/libjemalloc.so
  -- Found Intel TBB
  CMake Error at CMake/FindMcrypt.cmake:31 (message):
    Could NOT find mcrypt library.
  Call Stack (most recent call first):
    CMake/HPHPFindLibs.cmake:306 (find_package)
    CMake/HPHPSetup.cmake:125 (include)
    third-party/CMakeLists.txt:18 (include)
  
  
  -- Configuring incomplete, errors occurred!
  See also "/usr/local/hhvm/CMakeFiles/CMakeOutput.log".
  See also "/usr/local/hhvm/CMakeFiles/CMakeError.log".
  gahoachma@remote [/usr/local/hhvm]# sudo sed -i -e 's/$/..\/..\/..\/lib\/libmemcached.so/g' hphp/hhvm/CMakeFiles/hhvm.dir/link.txt
  sed: can't read hphp/hhvm/CMakeFiles/hhvm.dir/link.txt: No such file or directory
  gahoachma@remote [/usr/local/hhvm]# sudo sed -i -e 's/$/..\/..\/..\/lib\/libmemcached.so/g' hphp/hhvm/CMakeFiles/hhvm.dir/link.txt
  sed: can't read hphp/hhvm/CMakeFiles/hhvm.dir/link.txt: No such file or directory
  gahoachma@remote [/usr/local/hhvm]# sudo make
  make: *** No targets specified and no makefile found.  Stop.
  gahoachma@remote [/usr/local/hhvm]# make
  make: *** No targets specified and no makefile found.  Stop.
  gahoachma@remote [/usr/local/hhvm]# hhvm --version
  -bash: hhvm: command not found
  gahoachma@remote [/usr/local/hhvm]#
  </code></pre>