makedepf90: 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/makedepf90 - from package: makedepf90

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

On Debian possible default full paths are:

/usr/bin/makedepf90 - from package: makedepf90

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

Error in other languages:
makedepf90: bevel nie gevind nie
makedepf90: comandă negăsită
makedepf90: comando não encontrado
makedepf90: commande introuvable
makedepf90: command not found
makedepf90: käsku ei ole
makedepf90: không tìm thấy lệnh
makedepf90: komanda nerasta
makedepf90: Kommando nicht gefunden.
makedepf90: kommandot finns inte
makedepf90: komut yok
makedepf90: nie znaleziono polecenia
makedepf90: níor aimsíodh an t-ordú
makedepf90: no se encontró la orden
makedepf90: no s'ha trobat l'ordre
makedepf90: opdracht niet gevonden
makedepf90: parancs nem található
makedepf90: perintah tidak ditemukan
makedepf90: príkaz nenájdený
makedepf90: příkaz nenalezen
makedepf90: команда не найдена
makedepf90: командата не е открита
makedepf90: 命令找不到
makedepf90: コマンドが見つかりません