dlltool: 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/i686-w64-mingw32/bin/dlltool - from package: mingw32-binutils
/usr/x86_64-w64-mingw32/bin/dlltool - from package: mingw64-binutils

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

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