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How to enable PHP GMP --with-gmp on DirectAdmin CustomBuild

Andy

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If you want to add any extra modules to PHP, they'll most likely need to be compiled in. Any module that needs to be compiled in will have a --with-gmp type flag which will need to be used.
  1. First, figure out which configure file your system is using. Type:
    Bash:
    cd /usr/local/directadmin/custombuild
    ./build used_configs | grep configure.php
    Depending on your PHP version, it might look like this:
    Code:
    PHP (default) configuration file: /usr/local/directadmin/custombuild/configure/fpm/configure.php72
    Change in the values if they're different.
  2. To add this flag, run the following:
    Bash:
    cd /usr/local/directadmin/custombuild
    mkdir -p custom/fpm
    cp -fp configure/fpm/configure.php72 custom/fpm/configure.php72
  3. Add your --with-gmp line to the end of the custom/fpm/configure.php72 file, and make sure the \ character exists at the end of all lines except the last one. The \ character tells the line configure line to loop to the next line, making the configure settings easier to read. Without the \ character to trigger the wrap, the next line becomes a separate command, which is not correct. (see error below). Once set, type:
    Bash:
    ./build php n
    Change configure.php5 to configure.php4 if you're using php4.
    If you're using suphp, the paths would be configure/suphp/configure.php5 and custom/suphp/configure.php5.
    • If you get the following error message:
      Code:
      configure: error: Unable to locate gmp.h
    • Check if the following file is exist:
      Code:
      /usr/include/x86_64-linux-gnu/gmp.h
      If not:
      Code:
      sudo apt-get install libgmp-dev
  4. Restart apache:
    RedHat:
    Bash:
    /sbin/service httpd restart
    FreeBSD:
    Bash:
    /usr/local/etc/rc.d/httpd restart
Another common error people run into looks like this:
Code:
/usr/local/directadmin/custombuild/custom/fpm/configure.php72: line 36: --with-gmp: command not found
Which simply means that the \ character was not correctly added on the line before --with-gmp.
 
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