For some experiments I intend to run I needed a costum Ambient and so I crabed the sources from the CVS and build my own (100% fresh and pure MorphOS-SDK on 100% fresh and pure MorphOS2.5) but ran into some problems.

After installing the extra files demanded by the makefile it wotked o.k sofar, but resizing Ambinet-windows resulted in GFX-trash (looks like the width of some blit isn't updated with the resize).

On further investigating it turned out that the default is to build MorphOS1.4 compatible binaries (USE_LEGACY 1), but disabling that led to errors:

<proto/cgxdither.h> MIA
IECLASS_EXTRAWKEY not defined
dl_BannedDeviceNames no such member in struct
-lmemblock MIA