mingw-objdump: 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/mingw-objdump - from package: mingw-binutils-generic

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

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