wx-config: 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/wx-config - from package: wxGTK-devel

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