Download Crosstool-NG 1.22.0

wget https://github.com/crosstool-ng/crosstool-ng/archive/crosstool-ng-1.22.0.tar.gz

Unpack and change directory

tar -zxf crosstool-ng-1.22.0.tar.gz && \
cd crosstool-ng-crosstool-ng-1.22.0

Bootstrap configuration and configure

./bootstrap && \
./configure --prefix=/opt/crosstool-ng \
  --with-sed=/opt/local/bin/gsed \
  --with-libtool=/opt/local/bin/glibtool \
  --with-libtoolize=/opt/local/bin/glibtoolize \
  --with-objcopy=/opt/local/bin/gobjcopy \
  --with-objdump=/opt/local/bin/gobjdump \
  --with-readelf=/opt/local/bin/greadelf

Build and install

make && \
sudo make install