gpgme-config: 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/gpgme-config - from package: gpgme-devel

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

On Debian possible default full paths are:

/usr/bin/gpgme-config - from package: libgpgme11-dev

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

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