if ! [[ -d $HOME/SDK-archive/MacOSX10.14.sdk ]];then
echo"As of Nov 2019, Firefox does not build on Mac 10.15 without 10.14 SDK."
echo"Check out instructions on getting 10.14 sdk at https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Mac_OS_X_Prerequisites"
echo"and make sure to put SDK to $HOME/SDK-archive/MacOSX10.14.sdk/"
exit1
else
echo"-- configuting .mozconfig with 10.14 SDK path"