gcov: command not found

Have You tried accessing the binary with the full path?

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/gcov - from package: gcc

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

On Debian possible default full paths are:

/usr/bin/gcov - from package: gcc

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