sdcc-makebin: 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/sdcc-makebin - from package: sdcc

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

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