depends llvm " --llvm-root=$INSTALL_ROOT/usr --disable-llvm-version-check --disable-codegen-tests"&&
depends -sub CXX gcc &&
depends bison   &&
depends curl    &&
depends flex    &&
depends libxslt &&
depends python3 '--python=python3' &&
optional_depends ccache   '' '' 'optimise compile times' &&
optional_depends gdb      '' '' 'debugger' &&
optional_depends valgrind '' '' 'leak detector'

.