xmlrpc-c-config: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/xmlrpc-c-config - from package: xmlrpc-c-devel

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/xmlrpc-c-config - from package: libxmlrpc-core-c3-dev

You may install the required package with command apt-get install {package}

Error in other languages:
xmlrpc-c-config: bevel nie gevind nie
xmlrpc-c-config: comandă negăsită
xmlrpc-c-config: comando não encontrado
xmlrpc-c-config: commande introuvable
xmlrpc-c-config: command not found
xmlrpc-c-config: käsku ei ole
xmlrpc-c-config: không tìm thấy lệnh
xmlrpc-c-config: komanda nerasta
xmlrpc-c-config: Kommando nicht gefunden.
xmlrpc-c-config: kommandot finns inte
xmlrpc-c-config: komut yok
xmlrpc-c-config: nie znaleziono polecenia
xmlrpc-c-config: níor aimsíodh an t-ordú
xmlrpc-c-config: no se encontró la orden
xmlrpc-c-config: no s'ha trobat l'ordre
xmlrpc-c-config: opdracht niet gevonden
xmlrpc-c-config: parancs nem található
xmlrpc-c-config: perintah tidak ditemukan
xmlrpc-c-config: príkaz nenájdený
xmlrpc-c-config: příkaz nenalezen
xmlrpc-c-config: команда не найдена
xmlrpc-c-config: командата не е открита
xmlrpc-c-config: 命令找不到
xmlrpc-c-config: コマンドが見つかりません