Исправление ошибки buildconf: libtool not found при сборке Apache 2.4.x

Если при сборке Apache 2.4 с помощью скрипта CustomBuild возникает ошибка:

Configuring httpd-2.4.10
found apr source: srclib/apr
found apr-util source: srclib/apr-util
rebuilding srclib/apr/configure
buildconf: checking installation...
buildconf: python version 2.4.3 (ok)
buildconf: autoconf version 2.68 (ok)
buildconf: libtool not found.
           You need libtool version 1.4 or newer installed
           to build APR from SVN.
./buildconf failed for apr
/usr/local/directadmin/custombuild/configure/ap2/configure.apache: 
line 3: ./configure: No such file or directory

*** There was an error while trying to configure Apache 2. 
Check the configure/ap2/configure.apache file

Устранить ее достаточно просто:

cd /usr/local/directadmin/custombuild
./build libtool && ./build autoconf && ./build automake

И повторяем сборку apache.