amd64-mingw32msvc-objcopy: 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 Debian possible default full paths are:

/usr/bin/amd64-mingw32msvc-objcopy - from package: mingw32-binutils

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

Error in other languages:
amd64-mingw32msvc-objcopy: bevel nie gevind nie
amd64-mingw32msvc-objcopy: comandă negăsită
amd64-mingw32msvc-objcopy: comando não encontrado
amd64-mingw32msvc-objcopy: commande introuvable
amd64-mingw32msvc-objcopy: command not found
amd64-mingw32msvc-objcopy: käsku ei ole
amd64-mingw32msvc-objcopy: không tìm thấy lệnh
amd64-mingw32msvc-objcopy: komanda nerasta
amd64-mingw32msvc-objcopy: Kommando nicht gefunden.
amd64-mingw32msvc-objcopy: kommandot finns inte
amd64-mingw32msvc-objcopy: komut yok
amd64-mingw32msvc-objcopy: nie znaleziono polecenia
amd64-mingw32msvc-objcopy: níor aimsíodh an t-ordú
amd64-mingw32msvc-objcopy: no se encontró la orden
amd64-mingw32msvc-objcopy: no s'ha trobat l'ordre
amd64-mingw32msvc-objcopy: opdracht niet gevonden
amd64-mingw32msvc-objcopy: parancs nem található
amd64-mingw32msvc-objcopy: perintah tidak ditemukan
amd64-mingw32msvc-objcopy: príkaz nenájdený
amd64-mingw32msvc-objcopy: příkaz nenalezen
amd64-mingw32msvc-objcopy: команда не найдена
amd64-mingw32msvc-objcopy: командата не е открита
amd64-mingw32msvc-objcopy: 命令找不到
amd64-mingw32msvc-objcopy: コマンドが見つかりません