The masterpath is /usr alone. I have also attached a print screen of the toolchain window.
Adding "env" to the prebuild path gave me this
Running target pre-build steps
env
GDM_KEYBOARD_LAYOUT=us
GNOME_KEYRING_PID=1387
USER=venkak2
HOME=/home/venkak2
XDG_SESSION_COOKIE=74d71d281f69a358b940af214fec4118-1343832244.477641-747832526
DESKTOP_SESSION=gnome
GTK_MODULES=canberra-gtk-module
GNOME_KEYRING_CONTROL=/tmp/keyring-th4bcF
MANDATORY_PATH=/usr/share/gconf/gnome.mandatory.path
LOGNAME=venkak2
DEFAULTS_PATH=/usr/share/gconf/gnome.default.path
USERNAME=venkak2
GDM_LANG=en_US.UTF-8
PATH=/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/bin:/usr/games
DISPLAY=:0.0
LANG=en_US.UTF-8
XAUTHORITY=/var/run/gdm/auth-for-venkak2-rbxGCm/database
SHELL=/bin/bash
GDMSESSION=gnome
SPEECHD_PORT=7561
PWD=/home/venkak2
XDG_CONFIG_DIRS=/etc/xdg/xdg-gnome:/etc/xdg
XDG_DATA_DIRS=/usr/share/gnome:/usr/local/share/:/usr/share/
LIBGL_DRIVERS_PATH=/usr/lib/fglrx/dri:/usr/lib32/fglrx/dri
SSH_AUTH_SOCK=/tmp/keyring-th4bcF/ssh
SSH_AGENT_PID=1441
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-kV2H1bAoFK,guid=2510adacb591559824110b2c501940b4
GNOME_DESKTOP_SESSION_ID=this-is-deprecated
SESSION_MANAGER=local/labroot:@/tmp/.ICE-unix/1405,unix/labroot:/tmp/.ICE-unix/1405
ORBIT_SOCKETDIR=/tmp/orbit-venkak2
G_FILENAME_ENCODING=UTF-8
LD_LIBRARY_PATH=
-------------- Build: Release in newtest ---------------
g++ -Wall -fexceptions -O2 -c /home/venkak2/newtest/main.cpp -o /home/venkak2/newtest/obj/Release/main.o
execvp(g++ -Wall -fexceptions -O2 -c /home/venkak2/newtest/main.cpp -o /home/venkak2/newtest/obj/Release/main.o) failed with error 2!
Process terminated with status 255 (0 minutes, 0 seconds)
0 errors, 0 warnings
>>g++ --version
op: g++ (Ubuntu 4.4.3-4ubuntu5.1) 4.4.3
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