gccxml: 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/gccxml - from package: gccxml

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

On Debian possible default full paths are:

/usr/bin/gccxml - from package: gccxml

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

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