if [ -d "$topsrcdir/clang" ]; then
    # mozilla-central based build
    export CC=$topsrcdir/clang/bin/clang
    export CXX=$topsrcdir/clang/bin/clang++
elif [ -d "$topsrcdir/../clang" ]; then
    # comm-central based build
    export CC=$topsrcdir/../clang/bin/clang
    export CXX=$topsrcdir/../clang/bin/clang++
fi

ac_add_options --enable-stdcxx-compat
ac_add_options --with-ccache
