tile-linux-gnu-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

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/tile-linux-gnu-gcov - from package: gcc-tile-linux-gnu

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