Running -current guarantees stuff like that will happen every once in a while.
Updated toolchain, GCC, make or even GTK+2, which seems to be the case here.
The first thing to do in most occasions is aquiring the latest upstream available version of the application source code.
Gcompris 9.3 is available, so use that one.
Also take a look at this
build script and especially the sed lines.
Hope it helps in the process.