U-Boot for DX(G) firmware 2.5.8:
- Download the Amazon source bundle
- Extract the u-boot archive from bundle
- Unarchive the sources
- DIY-KeK top post, select the link to the resources description
- Click to "Historic Compilers"
- Download the indicated tool-chain
- Unarchive it into /opt
- Read u-boot README and top of Makefile
- Set and export the three environment changes:
[**] export BUILD_DIR
[**] export CROSS_COMPILE
[**] export PATH (with the compiler as first on the path)
- cd to root of u-boot source
- make imx31_mario_config
- make