add checks for when people have foolishly set things in their enviroment

echo ""

echo "Checking build system dependencies:"

#############################################################

#

# check build system 'environment'

#

#############################################################

if test -n "$CC" ; then

	echo "CC clean:					FALSE"

	/bin/echo -e "\n\nYou must run 'unset CC' so buildroot can run with";

	/bin/echo -e "a clean enviroment on your build machine\n";

	exit 1;

fi;

echo "CC clean:					Ok"

if test -n "$CXX" ; then

	echo "CXX clean:				FALSE"

	/bin/echo -e "\n\nYou must run 'unset CXX' so buildroot can run with";

	/bin/echo -e "a clean enviroment on your build machine\n";

	exit 1;

fi;

echo "CXX clean:					Ok"

if test -n "$CPP" ; then

	echo "CPP clean:				FALSE"

	/bin/echo -e "\n\nYou must run 'unset CPP' so buildroot can run with";

	/bin/echo -e "a clean enviroment on your build machine\n";

	exit 1;

fi;

echo "CPP clean:					Ok"

if test -n "$CXXFLAGS" ; then

	echo "CXXFLAGS clean:				FALSE"

	/bin/echo -e "\n\nYou must run 'unset CXXFLAGS' so buildroot can run with";

	/bin/echo -e "a clean enviroment on your build machine\n";

	exit 1;

fi;

echo "CXXFLAGS clean:					Ok"

if test -n "$CXXFLAGS" ; then

	echo "CXXFLAGS clean:				FALSE"

	/bin/echo -e "\n\nYou must run 'unset CXXFLAGS' so buildroot can run with";

	/bin/echo -e "a clean enviroment on your build machine\n";

	exit 1;

fi;

echo "CXXFLAGS clean:					Ok"

#############################################################

#

# check build system 'sed'